2024/03/28 更新

写真a

ハヤサカ キヨシ
早坂 圭司
HAYASAKA Kiyoshi
所属
教育研究院 自然科学系 数理物質科学系列 教授
理学部 理学科 教授
自然科学研究科 数理物質科学専攻 教授
職名
教授
外部リンク

学位

  • 博士(理学) ( 2001年3月   北海道大学 )

  • 修士(理学) ( 1996年3月   北海道大学 )

  • 学士(理学) ( 1994年3月   北海道大学 )

研究キーワード

  • 素粒子加速器実験

研究分野

  • 自然科学一般 / 素粒子、原子核、宇宙線、宇宙物理にする実験

経歴(researchmap)

  • 新潟大学   理学部   教授

    2021年8月 - 現在

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    国名:日本国

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  • 新潟大学   研究推進機構   研究教授

    2019年8月 - 2021年8月

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  • 新潟大学   理学部   准教授

    2016年3月 - 2021年8月

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  • 名古屋大学   素粒子宇宙起源研究機構   准教授

    2010年6月 - 2016年2月

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  • 名古屋大学   素粒子宇宙起源研究機構   特任准教授

    2009年10月 - 2010年5月

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  • 名古屋大学   理学部   特任助教

    2008年10月 - 2009年9月

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  • 名古屋大学   理学部   研究員(科研費RA)

    2003年4月 - 2008年9月

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▶ 全件表示

経歴

  • 新潟大学   教育研究院 自然科学系 数理物質科学系列   教授

    2021年8月 - 現在

  • 新潟大学   自然科学研究科 数理物質科学専攻   教授

    2021年8月 - 現在

  • 新潟大学   理学部 理学科   教授

    2021年8月 - 現在

  • 新潟大学   理学部 理学科   准教授

    2017年4月 - 2021年8月

  • 新潟大学   宇宙物理科学   准教授

    2016年3月 - 2017年3月

学歴

  • 北海道大学大学院   理学研究科   物理学専攻博士課程

    1996年4月 - 2001年3月

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  • 北海道大学大学院   理学研究科   物理学専攻修士課程

    1994年4月 - 1996年3月

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  • 北海道大学   理学部   物理学科

    1990年4月 - 1994年3月

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論文

  • Search for a dark leptophilic scalar produced in association with τ+τ- pair in e+e- annihilation at center-of-mass energies near 10.58 GeV

    D. Biswas, Sw Banerjee, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, P. Behera, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, S. Dubey, P. Ecker, D. Epifanov, T. Ferber, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, Y. Guan, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, S. Hazra, M. T. Hedges, D. Herrmann, M. Hernández Villanueva, W. S. Hou, C. L. Hsu, K. Inami, G. Inguglia, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. J. Kim, Y. K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, P. KriŽan, P. Krokovny, M. Kumar, K. Kumara, Y. J. Kwon, Y. T. Lai, M. Laurenza, S. C. Lee, D. Levit, J. Li, L. K. Li, Y. Li, L. Li Gioi, J. Libby, K. Lieret, Y. R. Lin

    Physical Review D   109 ( 3 )   2024年2月

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    掲載種別:研究論文(学術雑誌)  

    A dark leptophilic scalar (φL) is a hypothetical particle that couples only to leptons rather than quarks. We report on a search for φL in the e+e-→τ+τ-φL, φL→ℓ+ℓ-(ℓ=e,μ) process using 626 fb-1 of data collected by the Belle experiment near the ϒ(4S) resonance. We validate the backgrounds with multiple control regions in data, using a novel multiclass multivariate event classifier. In absence of a signal, we quote upper limits at the 90% confidence level on the coupling between φL and leptons. Our bounds, obtained in a blinded approach, are 19% more constraining than the previous limits, averaged over the mass range 0.04≤mφL≤6.5 GeV. We exclude the parameter space below 4 GeV favored by measurement of the anomalous magnetic moment of the muon.

    DOI: 10.1103/PhysRevD.109.032002

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  • Search for the decay Bs0 →j/ψπ0 at Belle experiment

    D. Kumar, B. Bhuyan, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, Sw Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, C. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, Z. DoleŽal, T. V. Dong, P. Ecker, D. Epifanov, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, S. Hazra, D. Herrmann, W. S. Hou, C. L. Hsu, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Kalita, A. B. Kaliyar, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara, T. Kumita, A. Kuzmin, Y. J. Kwon, T. Lam, S. C. Lee, D. Levit, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, Y. Ma, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola

    Physical Review D   109 ( 3 )   2024年2月

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    掲載種別:研究論文(学術雑誌)  

    We have analyzed 121.4 fb-1 of data collected at the ?(5S) resonance by the Belle experiment using the KEKB asymmetric-energy e+e- collider to search for the decay Bs0→J/ψπ0. We observe no signal and report an upper limit on the branching fraction B(Bs0→J/ψπ0) of 1.21×10-5 at 90% confidence level. This result is the most stringent, improving the previous bound by 2 orders of magnitude.

    DOI: 10.1103/PhysRevD.109.032007

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  • Search for baryon and lepton number violating decays D →pℓ

    S. Maity, R. Garg, S. Bahinipati, V. Bhardwaj, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw Banerjee, M. Bauer, J. Bennett, M. Bessner, D. Biswas, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, M. Bračko, P. Branchini, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, S. Das, N. Dash, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, T. V. Dong, P. Ecker, D. Epifanov, T. Ferber, B. G. Fulsom, V. Gaur, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, S. Hazra, W. S. Hou, C. L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, Y. Jin, D. Kalita, C. Kiesling, C. H. Kim, D. Y. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, P. KriŽan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, T. Lam, S. C. Lee, D. Levit, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, K. Lieret, D. Liventsev, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, F. Metzner, R. Mizuk, G. B. Mohanty, R. Mussa, M. Nakao, D. Narwal

    Physical Review D   109 ( 3 )   2024年2月

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    掲載種別:研究論文(学術雑誌)  

    We search for the baryon and lepton number violating charm decays, D→pℓ, where D is either a D0 or a D¯0 and ℓ is a muon or an electron, using a data sample of 921 fb-1 collected by the Belle detector at the KEKB asymmetric energy e+e- collider. In the absence of significant signals, we set upper limits on the branching fractions in the range (5-8)×10-7 at a 90% confidence level, depending on the decay mode.

    DOI: 10.1103/PhysRevD.109.L031101

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  • Observation of charmed strange meson pair production in ϒ (2S) decays and in e+e- annihilation at s =10.52 GeV

    B. S. Gao, W. J. Zhu, X. L. Wang, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, Sw Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, A. Bondar, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, P. Ecker, T. Ferber, D. Ferlewicz, B. G. Fulsom, V. Gaur, A. Giri, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, S. Hazra, M. T. Hedges, D. Herrmann, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, P. KriŽan, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, Y. T. Lai, S. C. Lee, D. Levit, P. Lewis, L. K. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev

    Physical Review D   108 ( 11 )   2023年12月

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    掲載種別:研究論文(学術雑誌)  

    We observe the process ϒ(2S)→Ds(∗)+DsJ- and continuum production e+e-→Ds(∗)+DsJ- at s=10.52 GeV (and their charge conjugates) using the data samples collected by the Belle detector at KEKB, where DsJ- is Ds1(2536)- or Ds2∗(2573)-. Both DsJ- states are identified through their decay into K̄D¯(∗). We measure the products of branching fractions B(ϒ(2S)→Ds(∗)+DsJ-)B(DsJ-→K̄D¯(∗)) and the Born cross sections σBorn(e+e-→Ds(∗)+DsJ-)B(DsJ-→K̄D¯(∗)), and then compare the ratios R1B(ϒ(2S)→Ds(∗)+DsJ-)/B(ϒ(2S)→μ+μ-) for ϒ(2S) decays and R2σBorn(e+e-→Ds(∗)+DsJ-)/σBorn(e+e-→μ+μ-) for continuum production. We obtain R1/R2=9.7±2.3±1.1, 6.8±2.1±0.8, 10.2±3.3±2.5, and 3.4±2.1±0.8 for the Ds+Ds1(2536)-, Ds∗+Ds1(2536)-, Ds+Ds2∗(2573)-, and Ds∗+Ds2∗(2573)- final states in the DsJ-→K-D¯(∗)0 modes, respectively. The measured R1/R2 values indicate that the strong decay dominates in ϒ(2S)→Ds(∗)+DsJ- processes. We also measure the ratios of branching fractions B(Ds1(2536)-→KS0D∗(2010)-)/B(Ds1(2536)-→K-D∗(2007)0)=0.48±0.07±0.02 and B(Ds2∗(2573)-→KS0D-)/B(Ds2∗(2573)-→K-D0)=0.49±0.10±0.02, which are consistent with isospin symmetry. The second ratio is the first measurement of this quantity. Here, the first uncertainties are statistical and the second are systematic.

    DOI: 10.1103/PhysRevD.108.112015

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  • Study of B+ →p n ¯ π0

    K. N. Chu, Y. R. Lin, M. Z. Wang, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, Sw Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Biswas, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, S. Halder, X. Han, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, K. Huang, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, Y. Jin, K. K. Joo, D. Kalita, A. B. Kaliyar, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara, A. Kuzmin

    Physical Review D   108 ( 11 )   2023年12月

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    掲載種別:研究論文(学術雑誌)  

    We search for the tree-diagram dominated process B+→pn¯π0, using a data sample of 772×106BB¯ pairs collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. This is the first search with the Belle detector for a decay mode including an antineutron. No significant signal is observed and a 90% credible upper limit on the branching fraction is set at 6.3×10-6.

    DOI: 10.1103/PhysRevD.108.112007

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  • Search for CP violation in D (s)+ →k+ KS0 h+h- (h=K, π) decays and observation of the Cabibbo-suppressed decay Ds+ →k+K- KS0 π+

    H. K. Moon, E. Won, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, D. Biswas, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, V. Chekelian, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, J. Cochran, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, D. Dossett, S. Dubey, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, S. Halder, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar

    Physical Review D   108 ( 11 )   2023年12月

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    掲載種別:研究論文(学術雑誌)  

    We search for CP violation by measuring a T-odd asymmetry in the Cabibbo-suppressed D+→K+KS0π+π- decay, and in the Cabibbo-favored Ds+→K+KS0π+π- and D+→K+K-KS0π+ decays. We use 980 fb-1 of data collected by the Belle detector running at the KEKB asymmetric-energy e+e- collider. The CP-violating T-odd parameter aCPT-odd is measured to be aCPT-odd(D+→K+KS0π+π-)=(0.34±0.87±0.32)%, aCPT-odd(Ds+→K+KS0π+π-)=(-0.46±0.63±0.38)%, and aCPT-odd(D+→K+K-KS0π+)=(-3.34±2.66±0.35)%, where the first uncertainty is statistical and the second is systematic. We also report the first observation of the Cabibbo-suppressed decay Ds+→K+K-KS0π+. The branching fraction is measured relative to that of the analogous Cabibbo-favored decay: B(Ds+→K+K-KS0π+)/B(Ds+→K+KS0π+π-)=(1.36±0.15±0.04)%.

    DOI: 10.1103/PhysRevD.108.L111102

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  • First Simultaneous Determination of Inclusive and Exclusive |Vub |

    L. Cao, F. Bernlochner, K. Tackmann, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Marino, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, T. Ferber, D. Ferlewicz, A. Frey, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, D. Kalita, K. H. Kang, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, T. Kuhr, R. Kumar

    Physical Review Letters   131 ( 21 )   2023年11月

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    掲載種別:研究論文(学術雑誌)  

    The first simultaneous determination of the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element Vub using inclusive and exclusive decays is performed with the full Belle data set at the (4S) resonance, corresponding to an integrated luminosity of 711 fb-1. We analyze collision events in which one B meson is fully reconstructed in hadronic modes. This allows for the reconstruction of the hadronic Xu system of the semileptonic b→uν¯ decay. We separate exclusive B→πν¯ decays from other inclusive B→Xuν¯ and backgrounds with a two-dimensional fit that utilizes the number of charged pions in the Xu system and the four-momentum transfer q2 between the B and Xu systems. Combining our measurement with information from lattice QCD and QCD calculations of the inclusive partial rate as well as external experimental information on the shape of the B→πν¯ form factor, we determine |Vubexcl|=(3.78±0.23±0.16±0.14)×10-3 and |Vubincl|=(3.88±0.20±0.31±0.09)×10-3, respectively, with the uncertainties being the statistical error, systematic errors, and theory errors. The ratio of |Vubexcl|/|Vubincl|=0.97±0.12 is compatible with unity.

    DOI: 10.1103/PhysRevLett.131.211801

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  • Search for a Heavy Neutrino in τ Decays at Belle

    D. Liventsev, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, R. Ayad, V. Babu, Sw Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Biswas, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, A. Chen, B. G. Cheon, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. DoleŽal, T. V. Dong, D. Dossett, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, X. Han, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, M. Hernández Villanueva, C. L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, A. B. Kaliyar, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y. J. Kwon, T. Lam, J. S. Lange, S. C. Lee, P. Lewis, L. K. Li, Y. Li, L. Li Gioi, J. Libby, K. Lieret

    Physical Review Letters   131 ( 21 )   2023年11月

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    掲載種別:研究論文(学術雑誌)  

    We report on a search for a heavy Majorana neutrino in the decays τ-→π-νh, νh→π± =e, μ. The results are obtained using the full data sample of 988 fb-1 collected with the Belle detector at the KEKB asymmetric energy e+e- collider, which contains 912×106 ττ pairs. We observe no significant signal and set 95% CL upper limits on the couplings of the heavy right-handed neutrinos to the conventional standard model left-handed neutrinos in the mass range 0.2-1.6 GeV/c2. This is the first study of a mixed couplings of heavy neutrinos to τ leptons and light-flavor leptons.

    DOI: 10.1103/PhysRevLett.131.211802

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  • Precise Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math> Lifetime at Belle II

    I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, J. Baudot, M. Bauer, A. Baur, A. Beaubien, J. Becker, P. K. Behera, J. V. Bennett, F. U. Bernlochner, V. Bertacchi, M. Bertemes, E. Bertholet, M. Bessner, S. Bettarini, B. Bhuyan, F. Bianchi, T. Bilka, D. Biswas, D. Bodrov, A. Bondar, A. Bozek, M. Bračko, P. Branchini, R. A. Briere, T. E. Browder, A. Budano, S. Bussino, M. Campajola, L. Cao, G. Casarosa, C. Cecchi, J. Cerasoli, M.-C. Chang, P. Chang, P. Cheema, V. Chekelian, B. G. Cheon, K. Chilikin, K. Chirapatpimol, H.-E. Cho, K. Cho, S.-K. Choi, S. Choudhury, J. Cochran, L. Corona, S. Das, F. Dattola, S. A. De La Motte, G. de Marino, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, S. Dey, R. Dhamija, A. Di Canto, F. Di Capua, J. Dingfelder, Z. Doležal, I. Domínguez Jiménez, T. V. Dong, M. Dorigo, K. Dort, S. Dreyer, S. Dubey, G. Dujany, P. Ecker, D. Epifanov, P. Feichtinger, D. Ferlewicz, C. Finck, G. Finocchiaro, A. Fodor, F. Forti, A. Frey, B. G. Fulsom, A. Gabrielli, E. Ganiev, M. Garcia-Hernandez, A. Garmash, G. Gaudino, V. Gaur, A. Gaz, A. Gellrich, G. Ghevondyan, D. Ghosh, H. Ghumaryan, G. Giakoustidis, R. Giordano, A. Giri, A. Glazov, B. Gobbo, R. Godang, O. Gogota, P. Goldenzweig, W. Gradl, E. Graziani, D. Greenwald, Z. Gruberová, T. Gu, Y. Guan, K. Gudkova, Y. Han, K. Hayasaka, H. Hayashii, S. Hazra, C. Hearty, I. Heredia de la Cruz, A. Hershenhorn, T. Higuchi, E. C. Hill, M. Hoek, M. Hohmann, C.-L. Hsu, T. Humair, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, S. Ito, R. Itoh, M. Iwasaki, P. Jackson, W. W. Jacobs, D. E. Jaffe, E.-J. Jang, Q. P. Ji, S. Jia, Y. Jin, H. Junkerkalefeld, A. B. Kaliyar, J. Kandra, G. Karyan, T. Kawasaki, F. Keil, C. Ketter, C. Kiesling, C.-H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, H. Kindo, K. Kinoshita, P. Kodyš, T. Koga, S. Kohani, K. Kojima, A. Korobov, S. Korpar, R. Kowalewski, T. M. G. Kraetzschmar, P. Križan, P. Krokovny, T. Kuhr, J. Kumar, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, S. Lacaprara, Y.-T. Lai, T. Lam, J. S. Lange, M. Laurenza, R. Leboucher, F. R. Le Diberder, P. Leitl, D. Levit, P. M. Lewis, L. K. Li, J. Libby, Q. Y. Liu, Z. Q. Liu, D. Liventsev, S. Longo, T. Lueck, C. Lyu, Y. Ma, M. Maggiora, S. P. Maharana, R. Maiti, S. Maity, R. Manfredi, E. Manoni, M. Mantovano, D. Marcantonio, S. Marcello, C. Marinas, C. Martellini, A. Martini, T. Martinov, L. Massaccesi, M. Masuda, T. Matsuda, K. Matsuoka, D. Matvienko, S. K. Maurya, J. A. McKenna, R. Mehta, F. Meier, M. Merola, F. Metzner, M. Milesi, C. Miller, M. Mirra, K. Miyabayashi, G. B. Mohanty, N. Molina-Gonzalez, S. Mondal, S. Moneta, H.-G. Moser, M. Mrvar, R. Mussa, I. Nakamura, Y. Nakazawa, A. Narimani Charan, M. Naruki, Z. Natkaniec, A. Natochii, L. Nayak, G. Nazaryan, N. K. Nisar, S. Nishida, H. Ono, F. Otani, E. R. Oxford, P. Pakhlov, G. Pakhlova, A. Paladino, A. Panta, E. Paoloni, S. Pardi, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, I. Peruzzi, R. Peschke, R. Pestotnik, F. Pham, M. Piccolo, L. E. Piilonen, T. Podobnik, S. Pokharel, C. Praz, S. Prell, E. Prencipe, M. T. Prim, H. Purwar, P. Rados, G. Raeuber, S. Raiz, M. Reif, S. Reiter, M. Remnev, I. Ripp-Baudot, G. Rizzo, J. M. Roney, A. Rostomyan, N. Rout, G. Russo, S. Sandilya, A. Sangal, L. Santelj, Y. Sato, V. Savinov, B. Scavino, C. Schmitt, C. Schwanda, A. J. Schwartz, Y. Seino, A. Selce, K. Senyo, J. Serrano, M. E. Sevior, C. Sfienti, W. Shan, X. D. Shi, T. Shillington, J.-G. Shiu, D. Shtol, A. Sibidanov, F. Simon, R. J. Sobie, M. Sobotzik, A. Soffer, A. Sokolov, E. Solovieva, S. Spataro, B. Spruck, M. Starič, P. Stavroulakis, Z. S. Stottler, R. Stroili, M. Sumihama, H. Svidras, M. Takahashi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, O. Tittel, D. Tonelli, E. Torassa, K. Trabelsi, I. Tsaklidis, K. Unger, Y. Unno, K. Uno, S. Uno, P. Urquijo, Y. Ushiroda, S. E. Vahsen, R. van Tonder, K. E. Varvell, M. Veronesi, V. S. Vismaya, L. Vitale, R. Volpe, B. Wach, S. Wallner, E. Wang, M.-Z. Wang, X. L. Wang, Z. Wang, A. Warburton, M. Watanabe, C. Wessel, E. Won, X. P. Xu, B. D. Yabsley, S. Yamada, W. Yan, S. B. Yang, K. Yoshihara, C. Z. Yuan, Y. Yusa, Y. Zhang, V. Zhilich, J. S. Zhou, Q. D. Zhou, V. I. Zhukova, R. Žlebčík

    Physical Review Letters   131 ( 17 )   2023年10月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevlett.131.171803

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  • Evidence for B0 →p ς ¯ 0π- at Belle

    C. Y. Chang, M. Z. Wang, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, F. Bernlochner, M. Bessner, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, L. Cao, D. Červenkov, M. C. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. DoleŽal, T. V. Dong, S. Dubey, P. Ecker, T. Ferber, D. Ferlewicz, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, K. Hayasaka, H. Hayashii, S. Hazra, M. T. Hedges, D. Herrmann, W. S. Hou, C. L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, T. Kuhr, M. Kumar, K. Kumara, A. Kuzmin

    Physical Review D   108 ( 5 )   2023年9月

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    掲載種別:研究論文(学術雑誌)  

    We search for the B0→pς¯0π- decay with ς¯0→Λ¯γ, where the γ is not measured, using a data sample corresponding to an integrated luminosity of 711 fb-1 which contains 772×106 BB¯ pairs, collected around the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure for the first time the B0→pς¯0π- branching fraction to be B(B0→pς¯0π-)=(1.17-0.40+0.43(stat)±0.07(syst))×10-6 with a significance of 3.0σ. We simultaneously measure the branching fraction for the related channel B0→pΛ¯π- with much improved precision.

    DOI: 10.1103/PhysRevD.108.052011

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  • Search for Bs0 → ℓ<sup>∓</sup> τ<sup>±</sup> with the semi-leptonic tagging method at Belle

    L. Nayak, S. Nishida, A. Giri, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, S. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, D. Biswas, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, J. Cochran, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, D. Dossett, S. Dubey, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, S. Halder, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin

    Journal of High Energy Physics   2023 ( 8 )   2023年9月

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    掲載種別:研究論文(学術雑誌)  

    We present a search for the lepton-flavor-violating decays Bs0 → ℓ∓ τ±, where ℓ = e, μ, using the full data sample of 121 fb−1 collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e− collider. We use Bs0B¯s0 events in which one Bs0 meson is reconstructed in a semileptonic decay mode and the other in the signal mode. We find no evidence for Bs0 → ℓ∓ τ± decays and set upper limits on their branching fractions at 90% confidence level as B (Bs0 → e∓ τ±) < 14 × 10−4 and B (Bs0 → μ∓ τ±) < 7.3 × 10−4. Our result represents the first upper limit on the Bs0 → e∓ τ± decay rate. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP08(2023)178

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  • Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math> -Meson Decays at Belle II

    L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, J. Baudot, M. Bauer, A. Baur, A. Beaubien, J. Becker, J. V. Bennett, E. Bernieri, F. U. Bernlochner, V. Bertacchi, M. Bertemes, E. Bertholet, M. Bessner, S. Bettarini, V. Bhardwaj, B. Bhuyan, F. Bianchi, T. Bilka, S. Bilokin, D. Biswas, D. Bodrov, J. Borah, A. Bozek, M. Bračko, R. A. Briere, T. E. Browder, A. Budano, S. Bussino, M. Campajola, L. Cao, G. Casarosa, C. Cecchi, J. Cerasoli, M.-C. Chang, R. Cheaib, P. Cheema, V. Chekelian, B. G. Cheon, K. Chilikin, K. Chirapatpimol, H.-E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, S. Choudhury, J. Cochran, L. Corona, S. Cunliffe, F. Dattola, E. De La Cruz-Burelo, S. A. De La Motte, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, M. Dorigo, D. Dossett, S. Dreyer, S. Dubey, G. Dujany, P. Ecker, M. Eliachevitch, P. Feichtinger, T. Ferber, D. Ferlewicz, T. Fillinger, G. Finocchiaro, A. Fodor, F. Forti, A. Frey, B. G. Fulsom, A. Gabrielli, E. Ganiev, M. Garcia-Hernandez, G. Gaudino, V. Gaur, A. Gaz, A. Gellrich, G. Ghevondyan, R. Giordano, A. Giri, A. Glazov, B. Gobbo, R. Godang, P. Goldenzweig, W. Gradl, T. Grammatico, S. Granderath, E. Graziani, Z. Gruberová, T. Gu, K. Gudkova, S. Halder, T. Hara, K. Hayasaka, H. Hayashii, S. Hazra, C. Hearty, M. T. Hedges, I. Heredia de la Cruz, M. Hernández Villanueva, A. Hershenhorn, T. Higuchi, E. C. Hill, M. Hohmann, C.-L. Hsu, T. Iijima, K. Inami, G. Inguglia, N. Ipsita, A. Ishikawa, S. Ito, R. Itoh, M. Iwasaki, W. W. Jacobs, E.-J. Jang, Q. P. Ji, S. Jia, Y. Jin, H. Junkerkalefeld, M. Kaleta, A. B. Kaliyar, G. Karyan, T. Kawasaki, C. Kiesling, C.-H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, H. Kindo, K. Kinoshita, P. Kodyš, S. Kohani, K. Kojima, A. Korobov, S. Korpar, E. Kovalenko, R. Kowalewski, P. Križan, P. Krokovny, J. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, S. Lacaprara, J. S. Lange, M. Laurenza, R. Leboucher, F. R. Le Diberder, D. Levit, P. M. Lewis, L. K. Li, J. Libby, Z. Liptak, Q. Y. Liu, Z. Q. Liu, D. Liventsev, S. Longo, T. Lueck, C. Lyu, Y. Ma, M. Maggiora, S. P. Maharana, R. Maiti, S. Maity, R. Manfredi, E. Manoni, A. C. Manthei, M. Mantovano, C. Marinas, L. Martel, C. Martellini, A. Martini, L. Massaccesi, M. Masuda, K. Matsuoka, D. Matvienko, S. K. Maurya, J. A. McKenna, F. Meier, M. Merola, F. Metzner, M. Milesi, C. Miller, K. Miyabayashi, R. Mizuk, G. B. Mohanty, S. Moneta, M. Mrvar, R. Mussa, I. Nakamura, K. R. Nakamura, M. Nakao, Y. Nakazawa, A. Narimani Charan, M. Naruki, D. Narwal, A. Natochii, L. Nayak, G. Nazaryan, N. K. Nisar, S. Nishida, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, A. Paladino, A. Panta, S. Pardi, H. Park, J. Park, B. Paschen, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, I. Peruzzi, R. Peschke, R. Pestotnik, L. E. Piilonen, G. Pinna Angioni, P. L. M. Podesta-Lerma, T. Podobnik, S. Pokharel, L. Polat, C. Praz, S. Prell, E. Prencipe, M. T. Prim, H. Purwar, N. Rad, P. Rados, G. Raeuber, M. Reif, S. Reiter, I. Ripp-Baudot, G. Rizzo, L. B. Rizzuto, P. Rocchetti, J. M. Roney, A. Rostomyan, N. Rout, D. A. Sanders, S. Sandilya, A. Sangal, L. Santelj, Y. Sato, B. Scavino, C. Schwanda, Y. Seino, A. Selce, K. Senyo, M. E. Sevior, C. Sfienti, W. Shan, C. Sharma, C. P. Shen, T. Shillington, J.-G. Shiu, F. Simon, J. B. Singh, J. Skorupa, R. J. Sobie, A. Soffer, A. Sokolov, E. Solovieva, S. Spataro, B. Spruck, M. Starič, S. Stefkova, R. Stroili, Y. Sue, M. Sumihama, W. Sutcliffe, S. Y. Suzuki, H. Svidras, M. Takizawa, U. Tamponi, K. Tanida, N. Taniguchi, F. Tenchini, R. Tiwary, D. Tonelli, E. Torassa, K. Trabelsi, I. Tsaklidis, I. Ueda, Y. Uematsu, T. Uglov, K. Unger, Y. Unno, K. Uno, S. Uno, P. Urquijo, Y. Ushiroda, S. E. Vahsen, R. van Tonder, G. S. Varner, K. E. Varvell, A. Vinokurova, V. S. Vismaya, L. Vitale, A. Vossen, S. Wallner, E. Wang, M.-Z. Wang, X. L. Wang, A. Warburton, M. Watanabe, S. Watanuki, M. Welsch, C. Wessel, E. Won, X. P. Xu, B. D. Yabsley, S. Yamada, W. Yan, S. B. Yang, H. Ye, J. H. Yin, Y. M. Yook, K. Yoshihara, Y. Zhai, Y. Zhang, V. Zhilich, Q. D. Zhou, X. Y. Zhou, V. I. Zhukova, R. Žlebčík

    Physical Review Letters   131 ( 5 )   2023年8月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevlett.131.051804

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  • Observation of a threshold cusp at the Λη threshold in the pK- mass spectrum with Λc+ →pK-π+ decays

    S. B. Yang, K. Tanida, J. K. Ahn, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Pietro, R. Dhamija, F. Di Capua, Z. DoleŽal, T. V. Dong, D. Dossett, D. Epifanov, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. J. Kim, Y. K. Kim, H. Kindo, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y. J. Kwon, T. Lam, J. S. Lange, M. Laurenza, J. Y. Lee, S. C. Lee

    Physical Review D   108 ( 3 )   2023年8月

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    掲載種別:研究論文(学術雑誌)  

    We observe a narrow peaking structure in the pK- invariant-mass spectrum near the Λη threshold. The peak is clearly seen in 1.5 million events of Λc+→pK-π+ decay using the 980 fb-1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. We try two approaches to explain this structure: as a new resonance and as a cusp at the Λη threshold. The best fit is obtained with a coherent sum of a Flatté function and a constant background amplitude with the reduced χ2 of 257/243 (p=0.25), while the fits to Breit-Wigner functions are unfavored by more than 7σ. The best fit explains the structure as a cusp at the Λη threshold, and the obtained parameters are consistent with the known properties of Λ(1670). The observation gives the first identification of a threshold cusp in hadrons from the spectrum shape.

    DOI: 10.1103/PhysRevD.108.L031104

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  • First Measurement of the Michel Parameter ζ′ in the τ- →μ- ν ¯ μντ Decay at Belle

    D. Bodrov, P. Pakhlov, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, A. Bobrov, A. Bondar, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, D. Greenwald, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, D. Kalita, A. B. Kaliyar, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, H. Kindo, K. Kinoshita, P. Kodyš, S. Korpar, P. KriŽan, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, Y. J. Kwon, J. S. Lange, S. C. Lee

    Physical Review Letters   131 ( 2 )   2023年7月

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    掲載種別:研究論文(学術雑誌)  

    We report the first measurement of the Michel parameter ζ′ in the τ-→μ-ν¯μντ decay with a new method proposed just recently. The measurement is based on the reconstruction of the τ-→μ-ν¯μντ events with subsequent muon decay in flight in the Belle central drift chamber. The analyzed data sample of 988 fb-1 collected by the Belle detector corresponds to approximately 912×106 τ+τ- pairs. We measure ζ′=0.22±0.94(stat)±0.42(syst), which is in agreement with the standard model prediction of ζ′=1. Statistical uncertainty dominates in this study, being a limiting factor, while systematic uncertainty is well under control. Our analysis proved the practicability of this promising method and its prospects for further precise measurement in future experiments.

    DOI: 10.1103/PhysRevLett.131.021801

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  • Study of the muon decay-in-flight in the τ- →μ- ν ¯ μντ decay to measure the Michel parameter ζ′

    D. Bodrov, P. Pakhlov, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, A. Bobrov, A. Bondar, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, B. G. Cheon, K. Chilikin, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, D. Greenwald, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, D. Kalita, A. B. Kaliyar, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, H. Kindo, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, P. KriŽan, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, Y. J. Kwon, J. S. Lange

    Physical Review D   108 ( 1 )   2023年7月

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    掲載種別:研究論文(学術雑誌)  

    We present the first measurement of the Michel parameter ζ′ in the τ-→μ-ν¯μντ decay using the full data sample of 988 fb-1 collected by the Belle detector operating at the KEKB asymmetric energy e+e- collider. The method is based on the reconstruction of the μ-→e-ν¯eνμ decay-in-flight in the Belle central drift chamber and relies on the correlation between muon spin and its daughter electron momentum. We study the main sources of the background that can imitate the signal decay, such as kaon and pion decays-in-flight and charged particle scattering on the detector material. Highly efficient methods of their suppression are developed and applied to select 165 signal-candidate events. We obtain ζ′=0.22±0.94±0.42 where the first uncertainty is statistical, and the second one is systematic. The result is in agreement with the Standard Model prediction of ζ′=1.

    DOI: 10.1103/PhysRevD.108.012003

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  • Measurement of differential distributions of B →d∗ℓ ν ¯ ℓ and implications on |Vcb |

    M. T. Prim, F. Bernlochner, F. Metzner, K. Lieret, T. Kuhr, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw Banerjee, M. Bauer, P. Behera, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Biswas, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, L. Cao, D. Červenkov, M. C. Chang, V. Chekelian, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Das, N. Dash, G. De Marino, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, A. Frey, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, M. Hernández Villanueva, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko

    Physical Review D   108 ( 1 )   2023年7月

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    掲載種別:研究論文(学術雑誌)  

    We present a measurement of the differential shapes of exclusive B→D∗ℓν¯ℓ (B=B-,B¯0 and ℓ=e, μ) decays with hadronic tag-side reconstruction for the full 711 fb-1 Belle dataset. We extract the Caprini-Lellouch-Neubert (CLN) and Boyd-Grinstein-Lebed (BGL) form factor parameters and use an external input for the absolute branching fractions to determine the Cabibbo-Kobayashi-Maskawa matrix element and find |Vcb|CLN=(40.2±0.9)×10-3 and |Vcb|BGL=(40.7±1.0)×10-3 with the zero-recoil lattice QCD point F(1)=0.906±0.013. We also perform a study of the impact of beyond zero-recoil lattice QCD calculations on the |Vcb| determinations. Additionally, we present the lepton-flavor universality ratio Reμ=B(B→D∗eν¯e)/B(B→D∗μν¯μ)=0.993±0.023±0.023, the electron and muon forward-backward asymmetry and their difference ΔAFB=0.028±0.028±0.008, and the electron and muon D∗ longitudinal polarization fraction and their difference ΔFLD∗=0.030±0.025±0.007. The uncertainties quoted correspond to the statistical and systematic uncertainties, respectively.

    DOI: 10.1103/PhysRevD.108.012002

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  • Search for lepton-flavor-violating τ decays into a lepton and a vector meson using the full Belle data sample

    N. Tsuzuki, K. Inami, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, J. Cochran, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, D. Dossett, S. Dubey, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, V. Gaur, A. Giri, P. Goldenzweig, Y. Guan, K. Gudkova, X. Han, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, W. S. Hou, C. L. Hsu, T. Iijima, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, M. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, S. C. Lee, J. Li, L. K. Li, Y. Li, J. Libby, K. Lieret, Y. R. Lin, D. Liventsev, Y. Ma

    Journal of High Energy Physics   2023 ( 6 )   2023年6月

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    掲載種別:研究論文(学術雑誌)  

    Charged-lepton-flavor-violation is predicted in several new physics scenarios. We update the analysis of τ lepton decays into a light charged lepton (ℓ = e ± or μ ±) and a vector meson (V 0 = ρ 0, ϕ, ω, K *0, or K¯ *0) using 980 fb−1 of data collected with the Belle detector at the KEKB collider. No significant excess of such signal events is observed, and thus 90% credibility level upper limits are set on the τ → ℓV 0 branching fractions in the range of (1.7–4.3) × 10−8. These limits are improved by 30% on average from the previous results. [Figure not available: see fulltext.].

    DOI: 10.1007/JHEP06(2023)118

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  • First Measurement of the B+ →π+π0π0 Branching Fraction and CP Asymmetry

    Y. T. Lai, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, A. Bobrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, T. Czank, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, T. Higuchi, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, A. B. Kaliyar, K. H. Kang, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, T. Lam, J. S. Lange, M. Laurenza, S. C. Lee

    Physical Review Letters   130 ( 18 )   2023年5月

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    掲載種別:研究論文(学術雑誌)  

    We study B+→π+π0π0 using 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure an inclusive branching fraction of (19.0±1.5±1.4)×10-6 and an inclusive CP asymmetry of (9.2±6.8±0.7)%, where the first uncertainties are statistical and the second are systematic, and a B+→ρ(770)+π0 branching fraction of (11.2±1.1±0.9-1.6+0.8)×10-6, where the third uncertainty is due to possible interference with B+→ρ(1450)+π0. We present the first observation of a structure around 1 GeV/c2 in the π0π0 mass spectrum, with a significance of 6.4σ, and measure a branching fraction to be (6.9±0.9±0.6)×10-6. We also report a measurement of local CP asymmetry in this structure.

    DOI: 10.1103/PhysRevLett.130.181804

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  • First observation of B → D ¯ 1 (→ D ¯ π+π-) ℓ+ν ℓ and measurement of the B → D ¯ (∗)π ℓ+ν ℓ and B → D ¯ (∗)π+π- ℓ+ν ℓ branching fractions with hadronic tagging at Belle

    F. Meier, A. Vossen, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, F. Bernlochner, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, L. Cao, D. Červenkov, M. C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, Y. Jin, A. B. Kaliyar, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, Y. J. Kwon

    Physical Review D   107 ( 9 )   2023年5月

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    掲載種別:研究論文(学術雑誌)  

    We report measurements of the ratios of branching fractions for B→D¯(∗)πℓ+νℓ and B→D¯(∗)π+π-ℓ+νℓ relative to B→D¯∗ℓ+νℓ decays with ℓ=e, μ. These results are obtained from a data sample that contains 772×106BB¯ pairs collected near the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. Fully reconstructing both B mesons in the event, we obtain B(B0→D¯0π-ℓ+νℓ)B(B0→D∗-ℓ+νℓ)=(7.23±0.36±0.14)%, B(B+→D-π+ℓ+νℓ)B(B+→D¯∗0ℓ+νℓ)=(6.78±0.24±0.18)%, B(B0→D¯∗0π-ℓ+νℓ)B(B0→D∗-ℓ+νℓ)=(11.10±0.48±0.23)%, B(B+→D∗-π+ℓ+νℓ)B(B+→D¯∗0ℓ+νℓ)=(9.50±0.33±0.34)%, B(B0→D-π+π-ℓ+νℓ)B(B0→D∗-ℓ+νℓ)=(2.91±0.37±0.26)%, B(B+→D¯0π+π-ℓ+νℓ)B(B+→D¯∗0ℓ+νℓ)=(3.10±0.26±0.22)%, B(B0→D∗-π+π-ℓ+νℓ)B(B0→D∗-ℓ+νℓ)=(0.99±0.43±0.20)%, B(B+→D¯∗0π+π-ℓ+νℓ)B(B+→D¯∗0ℓ+νℓ)=(1.25±0.27±0.15)%, where the uncertainties are statistical and systematic, respectively. These are the most precise measurements of these branching fraction ratios to date. The invariant mass spectra of the Dπ, D∗π, and Dππ systems are studied, and the branching fraction products B(B0→D2∗-ℓ+νℓ)×B(D2∗-→D¯0π-)=(0.157±0.015±0.005)%, B(B+→D¯0∗0ℓ+νℓ)×B(D¯0∗0→D-π+)=(0.054±0.022±0.005)%, B(B+→D¯2∗0ℓ+νℓ)×B(D¯2∗0→D-π+)=(0.163±0.011±0.008)%, B(B0→D1-ℓ+νℓ)×B(D1-→D¯∗0π-)=(0.306±0.050±0.029)%, B(B0→D1′-ℓ+νℓ)×B(D1′-→D¯∗0π-)=(0.206±0.068±0.025)%, B(B0→D2∗-ℓ+νℓ)×B(D2∗-→D¯∗0π-)=(0.051±0.040±0.010)%, B(B+→D¯10ℓ+νℓ)×B(D¯10→D∗-π+)=(0.249±0.023±0.015)%, B(B+→D¯1′0ℓ+νℓ)×B(D¯1′0→D∗-π+)=(0.138±0.036±0.009)%, B(B+→D¯2∗0ℓ+νℓ)×B(D¯2∗0→D∗-π+)=(0.137±0.026±0.009)%, B(B0→D1-ℓ+νℓ)×B(D1-→D-π+π-)=(0.102±0.013±0.009)%, B(B+→D¯10ℓ+νℓ)×B(D¯10→D¯0π+π-)=(0.105±0.011±0.009)%, are extracted. This is the first observation of the decays B→D¯1ℓ+νℓ with D1→Dπ+π-.

    DOI: 10.1103/PhysRevD.107.092003

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  • Multi-Resolution Convolutional Dictionary Learning For Riverbed Dynamics Modeling 査読

    E.Kobayashi, H.Yasuda, K.Hayasaka, Y.Otake, S.Ono, S.Muramatsu

    Proc. of 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)   2023年5月

  • Study of e+e- → ς0 ς ¯ 0 and ς+ ς ¯ - by initial state radiation method at Belle

    G. Gong, L. K. Li, Y. Zhang, W. Yan, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, A. Chen, Y. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. DoleŽal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, K. Gudkova, S. Halder, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, R. Kumar, K. Kumara, Y. J. Kwon, T. Lam, J. S. Lange, S. C. Lee, P. Lewis, C. H. Li, Y. Li, Y. B. Li

    Physical Review D   107 ( 7 )   2023年4月

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    掲載種別:研究論文(学術雑誌)  

    The processes e+e-→ς0ς¯0 and e+e-→ς+ς¯- are studied using initial-state-radiation events in a sample of 980 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The cross sections from the mass threshold to 3 GeV/c2 and the effective form factors of ς0 and ς+ are measured. In the charmonium region, we observe the decays J/ψ→ς0ς¯0 and J/ψ→ς+ς¯- and determine the respective branching fractions.

    DOI: 10.1103/PhysRevD.107.072008

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  • First Observation of Λπ+ and Λπ- Signals near the K ¯ N (I=1) Mass Threshold in Λc+ → Λπ+π+π- Decay

    Y. Ma, J. Yelton, K. Tanida, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, K. Gudkova, C. Hadjivasiliou, S. Halder, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, A. B. Kaliyar, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, R. Kumar, K. Kumara, Y. J. Kwon, T. Lam, J. S. Lange, S. C. Lee, P. Lewis, L. K. Li

    Physical Review Letters   130 ( 15 )   2023年4月

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    掲載種別:研究論文(学術雑誌)  

    Using the data sample of 980 fb-1 collected with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we present the results of an investigation of the Λπ+ and Λπ- invariant mass distributions looking for substructure in the decay Λc+→Λπ+π+π-. We find a significant signal in each mass distribution. When interpreted as resonances, we find for the Λπ+ (Λπ-) combination a mass of 1434.3±0.6(stat)±0.9(syst) MeV/c2 [1438.5±0.9(stat)±2.5(syst) MeV/c2], an intrinsic width of 11.5±2.8(stat)±5.3(syst) MeV/c2 [33.0±7.5(stat)±23.6(syst) MeV/c2] with a significance of 7.5σ (6.2σ). As these two signals are very close to the K̄N threshold, we also investigate the possibility of a K̄N cusp, and find that we cannot discriminate between these two interpretations due to the limited size of the data sample.

    DOI: 10.1103/PhysRevLett.130.151903

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  • Search for CP violation and measurement of branching fractions and decay asymmetry parameters for Λ<inf>c</inf><sup>+</sup>→Λh<sup>+</sup> and Λ<inf>c</inf><sup>+</sup>→Σ<sup>0</sup>h<sup>+</sup> (h=K,π)

    L. K. Li, W. Shan, K. Kinoshita, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, V. Babu, S. Bahinipati, Sw Banerjee, P. Behera, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, J. Borah, M. Bračko, P. Branchini, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, D. Epifanov, T. Ferber, A. Frey, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, G. Gong, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, K. Inami, A. Ishikawa, R. Itoh, W. W. Jacobs, E. J. Jang, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, Y. T. Lai, T. Lam, J. S. Lange, S. C. Lee, J. Li, S. X. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, M. Masuda

    Science Bulletin   68 ( 6 )   583 - 592   2023年3月

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    掲載種別:研究論文(学術雑誌)  

    We report a study of Λc+→Λh+ and Λc+→Σ0h+ (h=K,π) decays based on a data sample of 980fb-1 collected with the Belle detector at the KEKB energy-asymmetric e+e- collider. The first results of direct CP asymmetry in two-body singly Cabibbo-suppressed (SCS) decays of charmed baryons are measured, ACPdir(Λc+→ΛK+)=+0.021±0.026±0.001 and ACPdir(Λc+→Σ0K+)=+0.025±0.054±0.004. We also make the most precise measurement of the decay asymmetry parameters (α) for the four modes of interest and search for CP violation via the α-induced CP asymmetry (ACPα). We measure ACPα(Λc+→ΛK+)=-0.023±0.086±0.071 and ACPα(Λc+→Σ0K+)=+0.08±0.35±0.14, which are the first ACPα results for SCS decays of charmed baryons. We search for Λ-hyperon CP violation in Λc+→(Λ,Σ0)π+ and find ACPα(Λ→pπ-)=+0.013±0.007±0.011. This is the first time that hyperon CP violation has been measured via Cabibbo-favored charm decays. No evidence of baryon CP violation is found. We also obtain the most precise branching fractions for two SCS Λc+ decays, B(Λc+→ΛK+)=(6.57±0.17±0.11±0.35)×10-4 and B(Λc+→Σ0K+)=(3.58±0.19±0.06±0.19)×10-4. The first uncertainties are statistical and the second systematic, while the third uncertainties come from the uncertainties on the world average branching fractions of Λc+→(Λ,Σ0)π+.

    DOI: 10.1016/j.scib.2023.02.017

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  • Search for the decay B0s → π0 π0 at Belle 査読

    J. Borah, B. Bhuyan, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw. Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, D. Biswas, D. Bodrov, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, V. Chekelian, C. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, D. Epifanov, D. Ferlewicz, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, M. Hernández Villanueva, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, Q. P. Ji, Y. Jin, K. K. Joo, D. Kalita, A. B. Kaliyar, K. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, Y. J. Kwon, K. Lalwani, T. Lam, J. S. Lange, M. Laurenza, S. C. Lee, D. Levit, L. K. Li, Y. Li, L. Li Gioi, J. Libby, Y. R. Lin, D. Liventsev, T. Luo, M. Masuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, R. Mussa, I. Nakamura, M. Nakao, D. Narwal, Z. Natkaniec, A. Natochii, L. Nayak, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, J. Park, S. H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, M. Röhrken, A. Rostomyan, G. Russo, Y. Sakai, S. Sandilya, L. Santelj, V. Savinov, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, W. Shan, M. Shapkin, C. Sharma, C. P. Shen, J. G. Shiu, F. Simon, J. B. Singh, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, R. van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, A. Vossen, D. Wang, M. Z. Wang, M. Watanabe, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, J. Yelton, J. H. Yin, Y. Yook, C. Z. Yuan, L. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   107 ( 5 )   2023年3月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.107.l051101

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  • Two-particle angular correlations in e+e− collisions to hadronic final states in two reference coordinates at Belle

    Y.-C. Chen, Y.-J. Lee, P. Chang, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, V. Chekelian, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, W.-S. Hou, C.-L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y.-J. Kwon, T. Lam, J. S. Lange, S. C. Lee, J. Li, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, C.-W. Lin, K. Lieret, D. Liventsev, M. Masuda, T. Matsuda, S. K. Maurya, F. Meier, M. Merola, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Mrvar, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, N. Rout, G. Russo, S. Sandilya, A. Sangal, L. Santelj, V. Savinov, G. Schnell, C. Schwanda, R. Seidl, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, K. Uno, S. Uno, P. Urquijo, R. van Tonder, G. Varner, A. Vinokurova, A. Vossen, E. Waheed, E. Wang, M.-Z. Wang, X. L. Wang, M. Watanabe, S. Watanuki, E. Won, W. Yan, S. B. Yang, J. H. Yin, C. Z. Yuan, Y. Yusa, Y. Zhai, Z. P. Zhang, V. Zhilich, V. Zhukova

    Journal of High Energy Physics   2023 ( 3 )   2023年3月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Springer Science and Business Media LLC  

    Abstract

    We present the analysis of two-particle angular correlations using coordinate systems defined with the conventional beam axis and the event thrust axis. We propose the latter as a good representation for the correlation structure interpretation in the e<sup>+</sup>e<sup>−</sup> collision system. The e<sup>+</sup>e<sup>−</sup> collisions to hadronic final states at center-of-mass energies of $$ \sqrt{s} $$ = 10.52 GeV and 10.58 GeV are recorded by the Belle detector at KEKB. In this paper, results on the first dataset are supplementary to the previous Belle publication [1]. At the same time, the latter is the first two-particle correlation measurement at collision energy on the Υ(4S) resonance and is sensitive to its decay products. Measurements are reported as a function of the charged-particle multiplicity. Finally, a qualitative understanding of the correlation structure is discussed using a combination of Monte Carlo simulations and experimental data.

    DOI: 10.1007/jhep03(2023)171

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  • Averages of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>b</mml:mi></mml:math> -hadron, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>c</mml:mi></mml:math> -hadron, and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>τ</mml:mi></mml:math> -lepton properties as of 2021

    Y. Amhis, Sw. Banerjee, E. Ben-Haim, E. Bertholet, F. U. Bernlochner, M. Bona, A. Bozek, C. Bozzi, J. Brodzicka, V. Chobanova, M. Chrzaszcz, S. Duell, U. Egede, M. Gersabeck, T. Gershon, P. Goldenzweig, K. Hayasaka, D. Johnson, M. Kenzie, T. Kuhr, O. Leroy, A. Lusiani, H.-L. Ma, M. Margoni, K. Miyabayashi, R. Mizuk, P. Naik, T. Nanut Petrič, A. Oyanguren, A. Pompili, M. T. Prim, M. Roney, M. Rotondo, O. Schneider, C. Schwanda, A. J. Schwartz, J. Serrano, A. Soffer, D. Tonelli, P. Urquijo, J. Yelton

    Physical Review D   107 ( 5 )   2023年3月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.107.052008

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  • Search for X ( 3872 ) → π+ π− π0 at Belle 査読

    J. H. Yin, E. Won, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, K. K. Joo, H. Kakuno, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, T. Lam, J. S. Lange, S. C. Lee, C. H. Li, J. Li, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, K. Miyabayashi, R. Mizuk, G. B. Mohanty, H. K. Moon, M. Mrvar, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, S. Patra, S. Paul, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, N. Rout, G. Russo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, J. B. Singh, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, K. Sumisawa, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, M. Uchida, T. Uglov, Y. Unno, K. Uno, S. Uno, R. van Tonder, G. Varner, A. Vinokurova, E. Waheed, E. Wang, M.-Z. Wang, M. Watanabe, S. Watanuki, B. D. Yabsley, W. Yan, S. B. Yang, C. Z. Yuan, Y. Yusa, Y. Zhai, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    Physical Review D   107 ( 5 )   2023年3月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    We present a search for the decay X(3872)→π+π-π0 in the (772±11)×106 ϒ(4S)→BB¯ data sample collected at the Belle detector, where the X(3872) is produced in B±→K±X(3872) and B0→KS0X(3872) decays. We do not observe a signal, and set 90% credible upper limits for two different models of the decay processes: if the decay products are distributed uniformly in phase space, B(X(3872)→π+π-π0)<1.3%, and if M(π+π-) is concentrated near the mass of the D0D¯0 pair in the process X(3872)→D0D¯∗0+c.c.→D0D¯0π0→π+π-π0, B(X(3872)→π+π-π0)<1.2×10-3.

    DOI: 10.1103/physrevd.107.052004

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  • Measurement of the branching fraction and search for CP violation in D0 → K0S K0S π+ π− decays at Belle 査読

    A. Sangal, A. J. Schwartz, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, N. Dash, G. De Pietro, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, D. Dossett, D. Epifanov, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, Y. Guan, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, D. Herrmann, W.-S. Hou, C.-L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y.-J. Kwon, T. Lam, J. S. Lange, M. Laurenza, S. C. Lee, C. H. Li, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, A. Martini, M. Masuda, D. Matvienko, S. K. Maurya, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, H. K. Moon, R. Mussa, M. Nakao, D. Narwal, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, N. Rout, G. Russo, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, K. Sumisawa, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, K. Uno, S. Uno, Y. Ushiroda, Y. Usov, R. van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, E. Waheed, E. Wang, M.-Z. Wang, M. Watanabe, S. Watanuki, J. Wiechczynski, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    Physical Review D   107 ( 5 )   2023年3月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.107.052001

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  • Angular analysis of the low K+ K− invariant mass enhancement in B+ → K+ K− π+ decays 査読

    C.-L. Hsu, M. E. Sevior, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, T. Bloomfield, A. Bobrov, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, D. Dossett, S. Dubey, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, W.-S. Hou, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, C. Kiesling, C. H. Kim, D. Y. Kim, Y.-K. Kim, T. D. Kimmel, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, T. Kuhr, R. Kulasiri, K. Kumara, A. Kuzmin, Y.-J. Kwon, Y.-T. Lai, J. S. Lange, M. Laurenza, S. C. Lee, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, F. Meier, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, A. Passeri, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, K. Sumisawa, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, Y. Tao, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, R. van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, E. Waheed, C. H. Wang, E. Wang, X. L. Wang, M. Watanabe, S. Watanuki, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   107 ( 3 )   2023年2月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    We study the decay B+→K+K-π+ and investigate the angular distribution of K+K- pairs with invariant mass below 1.1 GeV/c2. This region exhibits both a strong enhancement in signal and very large direct CP violation. We construct a coherent sum model for the angular distribution of the S- and P-wave, and report the ratio of their amplitudes, the relative phase and the forward-backward asymmetry. We also report absolute differential branching fractions and direct CP asymmetry for the decay in bins of MK+K- and the differential branching fractions in bins of MK+π-. The results are based on a data sample that contains 772×106 BB¯ pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The result favors the presence of S- and D-waves in low MK+K- region to the detriment of a P-wave.

    DOI: 10.1103/physrevd.107.032013

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  • Measurement of the B+/B0 production ratio in e+ e− collisions at the Υ(4S) resonance using B → J/ψ (ℓℓ) K decays at Belle 査読

    S. Choudhury, S. Sandilya, K. Trabelsi, A. Giri, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, C. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, D. Cinabro, S. Das, G. De Pietro, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, D. Epifanov, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, D. Herrmann, W.-S. Hou, C.-L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E.-J. Jang, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, H. Kindo, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y.-J. Kwon, T. Lam, J. S. Lange, M. Laurenza, S. C. Lee, P. Lewis, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, I. Nakamura, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, S.-H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, S. Prell, E. Prencipe, M. T. Prim, N. Rout, G. Russo, Y. Sakai, A. Sangal, L. Santelj, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, J. B. Singh, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, R. van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, A. Vossen, E. Waheed, E. Wang, M.-Z. Wang, X. L. Wang, M. Watanabe, S. Watanuki, E. Won, X. Xu, B. D. Yabsley, S. B. Yang, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Y. Zhai, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   107 ( 3 )   2023年2月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    We measure the ratio of branching fractions for the ϒ(4S) decays to B+B- and B0B¯0 using B+→J/ψ(ℓℓ)K+ and B0→J/ψ(ℓℓ)K0 samples, where J/ψ(ℓℓ) stands for J/ψ→ℓ+ℓ- (ℓ=e or μ), with 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector. We find the decay rate ratio of ϒ(4S)→B+B- over ϒ(4S)→B0B¯0 to be 1.065±0.012±0.019±0.047, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in B→J/ψ(ℓℓ)K.

    DOI: 10.1103/physrevd.107.l031102

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  • Measurement of the mass and width of the Λc( 2625 )+ charmed baryon and the branching ratios of Λc(2625)+ → Σ0c π+ and Λc(2625)+ → Σ++c π− 査読

    D. Wang, J. Yelton, I. Adachi, J. K. Ahn, H. Aihara, D. M. Asner, H. Atmacan, R. Ayad, V. Babu, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Biswas, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, A. Chen, B. G. Cheon, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, D. Dossett, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, X. Han, K. Hayasaka, H. Hayashii, M. T. Hedges, C.-L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, A. B. Kaliyar, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y.-J. Kwon, T. Lam, J. S. Lange, S. C. Lee, D. Levit, P. Lewis, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, Y.-R. Lin, D. Liventsev, T. Matsuda, D. Matvienko, F. Meier, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, R. Mussa, I. Nakamura, T. Nakano, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Oskin, G. Pakhlova, S. Pardi, H. Park, J. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, N. Rout, G. Russo, S. Sandilya, A. Sangal, L. Santelj, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, W. Shan, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, A. Sokolov, E. Solovieva, M. Starič, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, S. Uno, R. van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, M.-Z. Wang, X. L. Wang, M. Watanabe, S. Watanuki, O. Werbycka, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, J. H. Yin, C. Z. Yuan, L. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   107 ( 3 )   2023年2月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.107.032008

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.107.032008/fulltext

  • Search for a Dark Photon and an Invisible Dark Higgs Boson in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> and Missing Energy Final States with the Belle II Experiment

    F. Abudinén, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, V. Babu, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, J. Baudot, A. Baur, A. Beaubien, J. Becker, P. K. Behera, J. V. Bennett, E. Bernieri, F. U. Bernlochner, M. Bertemes, E. Bertholet, M. Bessner, B. Bhuyan, F. Bianchi, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, A. Bolz, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, S. Bussino, M. Campajola, G. Casarosa, C. Cecchi, V. Chekelian, C. Chen, Y. Q. Chen, B. G. Cheon, K. Chilikin, K. Chirapatpimol, H.-E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, S. Choudhury, D. Cinabro, L. Corona, S. Cunliffe, F. Dattola, G. de Marino, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, S. Dey, A. De Yta-Hernandez, R. Dhamija, A. Di Canto, F. Di Capua, J. Dingfelder, Z. Doležal, I. Domínguez Jiménez, T. V. Dong, M. Dorigo, K. Dort, D. Dossett, S. Dreyer, S. Dubey, G. Dujany, M. Eliachevitch, D. Epifanov, P. Feichtinger, T. Ferber, D. Ferlewicz, T. Fillinger, C. Finck, G. Finocchiaro, K. Flood, A. Fodor, F. Forti, A. Frey, B. G. Fulsom, E. Ganiev, M. Garcia-Hernandez, V. Gaur, A. Gaz, A. Gellrich, R. Giordano, A. Giri, B. Gobbo, R. Godang, P. Goldenzweig, W. Gradl, S. Granderath, E. Graziani, D. Greenwald, T. Gu, K. Gudkova, J. Guilliams, C. Hadjivasiliou, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, S. Hazra, C. Hearty, M. T. Hedges, I. Heredia de la Cruz, M. Hernández Villanueva, A. Hershenhorn, T. Higuchi, E. C. Hill, M. Hoek, M. Hohmann, C.-L. Hsu, T. Iijima, K. Inami, G. Inguglia, N. Ipsita, A. Ishikawa, S. Ito, R. Itoh, M. Iwasaki, P. Jackson, W. W. Jacobs, D. E. Jaffe, E.-J. Jang, Q. P. Ji, S. Jia, Y. Jin, H. Junkerkalefeld, H. Kakuno, A. B. Kaliyar, J. Kandra, K. H. Kang, R. Karl, G. Karyan, T. Kawasaki, C. Ketter, H. Kichimi, C. Kiesling, C.-H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Koga, S. Kohani, K. Kojima, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, R. Kowalewski, T. M. G. Kraetzschmar, P. Križan, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara, T. Kunigo, Y.-J. Kwon, S. Lacaprara, Y.-T. Lai, T. Lam, J. S. Lange, M. Laurenza, R. Leboucher, S. C. Lee, L. K. Li, Y. B. Li, J. Libby, K. Lieret, Q. Y. Liu, D. Liventsev, S. Longo, A. Lozar, T. Lueck, C. Lyu, M. Maggiora, R. Maiti, S. Maity, R. Manfredi, E. Manoni, S. Marcello, C. Marinas, L. Martel, A. Martini, L. Massaccesi, M. Masuda, K. Matsuoka, J. A. McKenna, F. Meier, M. Merola, F. Metzner, M. Milesi, C. Miller, K. Miyabayashi, G. B. Mohanty, N. Molina-Gonzalez, S. Moneta, H. Moon, M. Mrvar, I. Nakamura, K. R. Nakamura, M. Nakao, H. Nakayama, A. Narimani Charan, M. Naruki, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, P. Oskin, G. Pakhlova, A. Paladino, A. Panta, S. Pardi, K. Parham, H. Park, S.-H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, M. Piccolo, L. E. Piilonen, G. Pinna Angioni, P. L. M. Podesta-Lerma, T. Podobnik, S. Pokharel, L. Polat, C. Praz, S. Prell, E. Prencipe, M. T. Prim, H. Purwar, N. Rad, P. Rados, S. Raiz, A. Ramirez Morales, M. Reif, S. Reiter, M. Remnev, I. Ripp-Baudot, G. Rizzo, S. H. Robertson, D. Rodríguez Pérez, J. M. Roney, A. Rostomyan, N. Rout, D. Sahoo, D. A. Sanders, S. Sandilya, L. Santelj, Y. Sato, B. Scavino, J. Schueler, C. Schwanda, Y. Seino, A. Selce, K. Senyo, J. Serrano, M. E. Sevior, C. Sfienti, T. Shillington, J.-G. Shiu, A. Sibidanov, F. Simon, J. B. Singh, J. Skorupa, A. Soffer, A. Sokolov, E. Solovieva, S. Spataro, B. Spruck, M. Starič, S. Stefkova, Z. S. Stottler, R. Stroili, M. Sumihama, K. Sumisawa, W. Sutcliffe, S. Y. Suzuki, H. Svidras, M. Tabata, M. Takizawa, U. Tamponi, S. Tanaka, K. Tanida, H. Tanigawa, F. Tenchini, R. Tiwary, D. Tonelli, E. Torassa, N. Toutounji, K. Trabelsi, M. Uchida, I. Ueda, Y. Uematsu, T. Uglov, K. Unger, Y. Unno, K. Uno, S. Uno, Y. Ushiroda, S. E. Vahsen, R. van Tonder, G. S. Varner, K. E. Varvell, A. Vinokurova, L. Vitale, V. Vobbilisetti, E. Waheed, H. M. Wakeling, E. Wang, M.-Z. Wang, A. Warburton, M. Watanabe, S. Watanuki, M. Welsch, C. Wessel, H. Windel, E. Won, X. P. Xu, B. D. Yabsley, S. Yamada, W. Yan, S. B. Yang, H. Ye, J. H. Yin, K. Yoshihara, C. Z. Yuan, Y. Yusa, L. Zani, Y. Zhang, V. Zhilich, Q. D. Zhou, X. Y. Zhou, V. I. Zhukova, R. Žlebčík

    Physical Review Letters   130 ( 7 )   2023年2月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevlett.130.071804

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  • Search for rare decays B+ → D(*)+s η, D(*)+s¯ K0, D+ η, and D+ K0 査読

    M. Kumar, V. Bhardwaj, K. Lalwani, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, V. Babu, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, P. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, N. Dash, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, D. Dossett, D. Epifanov, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, T. Hara, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E.-J. Jang, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, D. Kalita, K. H. Kang, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, R. Kumar, K. Kumara, Y.-J. Kwon, T. Lam, J. S. Lange, M. Laurenza, S. C. Lee, C. H. Li, J. Li, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Mrvar, I. Nakamura, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, M. V. Purohit, N. Rout, G. Russo, S. Sandilya, A. Sangal, L. Santelj, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, J. B. Singh, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, T. Tsuboyama, M. Uchida, Y. Unno, S. Uno, R. van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, E. Waheed, E. Wang, M.-Z. Wang, X. L. Wang, M. Watanabe, S. Watanuki, O. Werbycka, J. Wiechczynski, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Y. Zhai, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   107 ( 3 )   2023年2月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    We present a study of rare decay modes B+→Ds+h0, B+→Ds∗+h0, and B+→D+h0, where h0 denotes the neutral meson η or K0, using a data sample of (772±10)×106 BB¯ events produced at the ϒ(4S) resonance. The data were collected by the Belle detector operating at the asymmetric-energy KEKB collider. We find no evidence for these decays, so we set upper limits at the 90% confidence level on the branching fractions of B+→Ds+h0, Ds∗+h0, and D+h0 decay modes. Along with these rare decay modes, we report improved measurements of the color-suppressed decay branching fractions B(B¯0→D0η)=(26.6±1.2±2.1)×10-5 and B(B¯0→D0K̄0)=(5.6±0.5±0.2)×10-5. The first and second quoted uncertainties are statistical and systematic, respectively.

    DOI: 10.1103/physrevd.107.l031101

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  • Measurement of the branching fractions for Cabibbo-suppressed decays D+ → K+ K− π+ π0 and D+( s ) → K+ π− π+ π0 at Belle 査読

    L. K. Li, A. J. Schwartz, K. Kinoshita, E. Won, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, P. Chang, A. Chen, B. G. Cheon, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, D. Dossett, D. Epifanov, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, D. Greenwald, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, D. Herrmann, W.-S. Hou, C.-L. Hsu, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Kalita, A. B. Kaliyar, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, K. T. Kim, Y.-K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, Y.-T. Lai, T. Lam, M. Laurenza, S. C. Lee, J. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, A. Martini, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, H. K. Moon, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, J.-G. Shiu, F. Simon, J. B. Singh, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, K. Uno, S. Uno, Y. Ushiroda, Y. Usov, R. van Tonder, G. Varner, K. E. Varvell, A. Vossen, E. Waheed, E. Wang, M.-Z. Wang, X. L. Wang, S. Watanuki, O. Werbycka, J. Wiechczynski, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   107 ( 3 )   2023年2月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    We present measurements of the branching fractions for the singly Cabibbo-suppressed decays D+→K+K-π+π0 and Ds+→K+π-π+π0, and the doubly Cabibbo-suppressed decay D+→K+π-π+π0, based on 980 fb-1 of data recorded by the Belle experiment at the KEKB e+e- collider. We measure these modes relative to the Cabibbo-favored modes D+→K-π+π+π0 and Ds+→K+K-π+π0. Our results for the ratios of branching fractions are B(D+→K+K-π+π0)/B(D+→K-π+π+π0)=(11.32±0.13±0.26)%, B(D+→K+π-π+π0)/B(D+→K-π+π+π0)=(1.68±0.11±0.03)%, and B(Ds+→K+π-π+π0)/B(Ds+→K+K-π+π0)=(17.13±0.62±0.51)%, where the uncertainties are statistical and systematic, respectively. The second value corresponds to (5.83±0.42)×tan4θC, where θC is the Cabibbo angle; this value is larger than other measured ratios of branching fractions for a doubly Cabibbo-suppressed charm decay to a Cabibbo-favored decay. Multiplying these results by world average values for B(D+→K-π+π+π0) and B(Ds+→K+K-π+π0) yields B(D+→K+K-π+π0)=(7.08±0.08±0.16±0.20)×10-3, B(D+→K+π-π+π0)=(1.05±0.07±0.02±0.03)×10-3, and B(Ds+→K+π-π+π0)=(9.44±0.34±0.28±0.32)×10-3, where the third uncertainty is due to the branching fraction of the normalization mode. The first two results are consistent with, but more precise than, the current world averages. The last result is the first measurement of this branching fraction.

    DOI: 10.1103/physrevd.107.033003

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  • First search for the weak radiative decays Λ+c → Σ+ γ and Ξ0c → Ξ0 γ 査読

    Y. Li, C. P. Shen, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, V. Babu, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, P. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, N. Dash, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, D. Dossett, D. Epifanov, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E.-J. Jang, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y.-J. Kwon, T. Lam, J. S. Lange, M. Laurenza, S. C. Lee, C. H. Li, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, M. Mrvar, I. Nakamura, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, N. Rout, G. Russo, S. Sandilya, A. Sangal, L. Santelj, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, J.-G. Shiu, J. B. Singh, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, T. Tsuboyama, M. Uchida, Y. Unno, S. Uno, R. van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, E. Waheed, E. Wang, M.-Z. Wang, M. Watanabe, S. Watanuki, O. Werbycka, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Y. Zhai, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   107 ( 3 )   2023年2月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.107.032001

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.107.032001/fulltext

  • Measurement of branching fractions of $\Lambda_c^+\to{}pK_S^0K_S^0$ and $\Lambda_c^+\to{}pK_S^0\eta$ at Belle 査読

    Longke Li, Kay Kinoshita, Ichiro Adachi, Jung Keun Ahn, Hiroaki Aihara, Said Al Said, David Asner, Tagir Aushev, Rachid Ayad, Varghese Babu, Seema Bahinipati, swagato banerjee, Prafulla Kumar Behera, Konstantin Belous, Jake Bennett, Martin Bessner, BIPUL BHUYAN, Tadeas Bilka, Diptaparna Biswas, Alexander Bobrov, Denis Bodrov, giovanni bonvicini, Jyotirmoi Borah, Andrzej Bożek, Marko Bračko, Paolo Branchini, Thomas E Browder, Antonio Budano, Marcello Campajola, Daniel Červenkov, M.-C. Chang, Augustine Chen, ByungGu Cheon, Kirill Chilikin, Kihyeon Cho, Sungjin Cho, YOUNG-IL CHOI, Seema Choudhury, David Cinabro, Sanjeeda Bharati Das, Guglielmo De Nardo, Giacomo De Pietro, Rashmi Dhamija, Francesco Di Capua, Jochen Dingfelder, Zdeněk Doležal, T. V. Dong, Denis Epifanov, Torben Ferber, Daniel Ferlewicz, Bryan FULSOM, Renu, Vipin Gaur, Alexey Garmash, Anjan Giri, Pablo Goldenzweig, Bostjan Golob, Guanda Gong, Enrico Graziani, Yinghui Guan, Kristina Gudkova, Christos Hadjivasiliou, Soumen Halder, Xiao Han, Kiyoshi Hayasaka, Hisaki Hayashii, Michael Thomas Hedges, Wei-Shu Hou, Chia-Ling Hsu, Kenji Inami, N Sushree Ipsita, A. Ishikawa, Ryosuke Itoh, Masako Iwasaki, W. W. Jacobs, Eunji Jang, Qingping Ji, Sen Jia, Yifan Jin, Kyung Kwang Joo, Kookhyun Kang, Takeo Kawasaki, Cheolhun Kim, Doris Yangsoo Kim, Kyungho KIM, Yongkyu kim, Peter Kodyš, Alexandr Korobov, Samo Korpar, Evgeniy Kovalenko, Peter Križan, Pavel Krokovny, Thomas Kuhr, Manish Kumar, RAJEEV KUMAR, Kospalage kumara, Young-Joon Kwon, Tommy Lam, Jens Sören Lange, Seungcheol Lee, Chunhua Li, Suxian Li Li, Yang Li, Yubo Li, Luigi LI GIOI, James Libby, Kilian Lieret, Yuan-Ru Lin, Dmitri Liventsev, Tao Luo, Masataka Masuda, Tatsuro Matsuda, Dmitry Matvienko, Shubhangi Krishan Maurya, Frank Meier, Mario Merola, Felix Metzner, Kenkichi Miyabayashi, Roman Mizuk, Roberto Mussa, isamu nakamura, Takashi Nakano, Mikihiko Nakao, Zbigniew Natkaniec, Andrii Natochii, Lopamudra Nayak, M. Nayak, N. K. Nisar, Shohei Nishida, Satoru Ogawa, Hiroaki Ono, Pavel Pakhlov, Galina Pakhlova, Silvio Pardi, Hwanbae Park, Junewoo Park, antonio passeri, Sourav Patra, Stephan Paul, Rok Pestotnik, Leo Piilonen, Tomaž Podobnik, Elisabetta Prencipe, Markus Tobias Prim, Armine Rostomyan, N. Rout, Guido Russo, Yoshihide Sakai, Saurabh Sandilya, Vladimir Savinov, Gunar Schnell, Jeffrey Schueler, Christoph Schwanda, Alan Schwartz, Yoshiaki Seino, Katsumi Senyo, Martin Sevior, Wei Shan, Mikhail Shapkin, Chanchal Sharma, Chengping Shen, Jing-Ge Shiu, Frank Simon, J.B. Singh, Elena Solovieva, Staric Marko, Jan Strube, Mizuki Sumihama, Takayuki SUMIYOSHI, Makoto Takizawa, umberto tamponi, shishuai tang, Kiyoshi Tanida, Francesco Tenchini, Makoto Uchida, Timofey Uglov, Yuuji Unno, Kenta Uno, SHOJI UNO, PHILLIP URQUIJO, Sven Vahsen, Raynette van Tonder, Gary Varner, Kevin Varvell, Anna Vinokurova, Anselm Vossen, Dazhi Wang, MIN-ZU WANG, Xiaolong Wang, minori Watanabe, Shun Watanuki, Olga Werbycka, Jaroslaw Wiechczynski, Eunil Won, Xinping Xu, Bruce Yabsley, Wenbiao Yan, Seongbae Yang, John Yelton, Junhao Yin, Chang-Zheng Yuan, Li Yuan, Yosuke Yusa, Ziping Zhang, Victor Zhilich, Valentina Zhukova

    Phys.Rev.D   107 ( 3 )   032004 - 032004   2023年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.107.032004

    arXiv

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  • Measurements of branching fractions of Λc+ → ς+η and Λc+ → ς+η′ and asymmetry parameters of Λc+ → ς+π0, Λc+ → ς+η, and Λc+ → ς+η′

    S. X. Li, C. P. Shen, I. Adachi, J. K. Ahn, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, G. De Pietro, R. Dhamija, F. Di Capua, T. V. Dong, T. Ferber, A. Frey, B. G. Fulsom, V. Gaur, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, C. L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, W. W. Jacobs, Y. Jin, K. K. Joo, D. Kalita, A. B. Kaliyar, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, T. Lam, J. S. Lange, S. C. Lee, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, M. Masuda, T. Matsuda, S. K. Maurya, F. Meier, M. Merola, F. Metzner, R. Mizuk, R. Mussa

    Physical Review D   107 ( 3 )   2023年2月

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    掲載種別:研究論文(学術雑誌)  

    We report a study of Λc+→ς+π0, Λc+→ς+η, and Λc+→ς+η′ using the data sample corresponding to an integrated luminosity of 980 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The branching fractions relative to Λc+→ς+π0 are measured as BΛc+→ς+η/BΛc+→ς+π0=0.25±0.03±0.01 and BΛc+→ς+η′/BΛc+→ς+π0=0.33±0.06±0.02. Using BΛc+→ς+π0=(1.25±0.10)%, we obtain BΛc+→ς+η=(3.14±0.35±0.17±0.25)×10-3 and BΛc+→ς+η′=(4.16±0.75±0.25±0.33)×10-3. Here the uncertainties are statistical, systematic, and from BΛc+→ς+π0, respectively. The ratio of the branching fraction of Λc+→ς+η′ with respect to that of Λc+→ς+η is measured to be BΛc+→ς+η′/BΛc+→ς+η=1.34±0.28±0.08. We update the asymmetry parameter of Λc+→ς+π0, ας+π0=-0.48±0.02±0.02, with a considerably improved precision. The asymmetry parameters of Λc+→ς+η and Λc+→ς+η′ are measured to be ας+η=-0.99±0.03±0.05 and ας+η′=-0.46±0.06±0.03 for the first time.

    DOI: 10.1103/PhysRevD.107.032003

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  • Measurement of the Lambda(+)(c) Lifetime

    F. Abudinen, L. Aggarwal, H. Ahmed, J. K. Ahn, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, V. Babu, H. Bae, P. Bambade, Sw. Banerjee, S. Bansal, J. Baudot, M. Bauer, A. Baur, A. Beaubien, J. Becker, J. Bennett, E. Bernieri, F. U. Bernlochner, V. Bertacchi, M. Bertemes, E. Bertholet, M. Bessner, S. Bettarini, V. Bhardwaj, F. Bianchi, T. Bilka, D. Biswas, D. Bodrov, A. Bolz, G. Bonvicini, A. Bozek, M. Bracko, P. Branchini, R. A. Briere, T. E. Browder, A. Budano, S. Bussino, M. Campajola, L. Cao, G. Casarosa, C. Cecchi, M. -C. Chang, P. Chang, R. Cheaib, P. Cheema, C. Chen, Y. Q. Chen, Y. -T. Chen, B. G. Cheon, K. Chilikin, K. Chirapatpimol, H. -E. Cho, K. Cho, S. -J. Cho, S. -K. Choi, S. Choudhury, D. Cinabro, L. Corona, L. M. Cremaldi, S. Cunliffe, F. Dattola, E. De La Cruz-Burelo, S. A. De La Motte, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, A. De Yta-Hernandez, R. Dhamija, A. Di Canto, F. Di Capua, J. Dingfelder, Z. Dolezal, I. Dominguez Jimeinez, T. V. Dong, M. Dorigo, K. Dort, D. Dossett, S. Dreyer, G. Dujany, M. Eliachevitch, D. Epifanov, P. Feichtinger, T. Ferber, D. Ferlewicz, T. Fillinger, G. Finocchiaro, K. Flood, A. Fodor, F. Forti, A. Frey, B. G. Fulsom, A. Gabrielli, E. Ganiev, M. Garcia-Hernandez, A. Gaz, A. Gellrich, G. Ghevondyan, R. Giordano, A. Giri, A. Glazov, B. Gobbo, R. Godang, P. Goldenzweig, W. Gradl, S. Granderath, D. Greenwald, T. Gu, Y. Guan, K. Gudkova, J. Guilliams, S. Halder, K. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, S. Hazra, C. Hearty, I. Heredia de la Cruz, M. Hernandez Villanueva, A. Hershenhorn, T. Higuchi, M. Hohmann, T. Humair, T. Iijima, K. Inami, G. Inguglia, N. Ipsita, A. Ishikawa, S. Ito, R. Itoh, M. Iwasaki, Y. Iwasaki, P. Jackson, W. W. Jacobs, D. E. Jaffe, Q. P. Ji, Y. Jin, H. Junkerkalefeld, M. Kaleta, J. Kandra, K. H. Kang, R. Karl, G. Karyan, C. Kiesling, C. -H. Kim, D. Y. Kim, K. -H. Kim, Y. -K. Kim, H. Kindo, K. Kinoshita, P. Kodys, T. Koga, S. Kohani, K. Kojima, A. Korobov, S. Korpar, E. Kovalenko, R. Kowalewski, T. M. G. Kraetzschmar, P. Krizan, P. Krokovny, T. Kuhr, J. Kumar, R. Kumar, K. Kumara, T. Kunigo, Y. -J Kwon, S. Lacaprara, T. Lam, L. Lanceri, J. S. Lange, M. Laurenza, R. Leboucher, S. C. Lee, P. Leitl, D. Levit, L. K. Li, S. X. Li, Y. B. Li, J. Libby, Z. Liptak, Q. Y. Liu, D. Liventsev, S. Longo, T. Lueck, C. Lyu, M. Maggiora, R. Maiti, S. Maity, R. Manfredi, E. Manoni, S. Marcello, C. Marinas, L. Martel, A. Martini, L. Massaccesi, M. Masuda, K. Matsuoka, D. Matvienko, J. A. McKenna, F. Meier, M. Merola, M. Milesi, C. Miller, K. Miyabayashi, G. B. Mohanty, N. Molina-Gonzalez, S. Moneta, H. Moon, H. -G. Moser, M. Mrvar, R. Mussa, I. Nakamura, M. Nakao, H. Nakayama, A. Narimani Charan, M. Naruki, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, G. Nazaryan, C. Niebuhr, N. K. Nisar, S. Nishida, K. Nishimura, H. Ono, P. Oskin, E. R. Oxford, G. Pakhlova, A. Paladino, A. Panta, E. Paoloni, S. Pardi, K. Parham, H. Park, S. -H Park, A. Passeri, T. K. Pedlar, I. Peruzzi, R. Peschke, R. Pestotnik, F. Pham, L. E. Piilonen, G. Pinna Angioni, P. L. M. Podesta-Lerma, T. Podobnik, S. Pokharel, L. Polat, C. Praz, S. Prell, E. Prencipe, M. T. Prim, H. Purwar, N. Rad, P. Rados, S. Raiz, M. Reif, S. Reiter, I. Ripp-Baudot, G. Rizzo, S. H. Robertson, J. M. Roney, A. Rostomyan, N. Rout, G. Russo, D. A. Sanders, S. Sandilya, A. Sangal, L. Santelj, Y. Sato, V. Savinov, B. Scavino, C. Schwanda, A. J. Schwartz, Y. Seino, A. Selce, K. Senyo, J. Serrano, C. Sfienti, C. P. Shen, T. Shillington, J. -G. Shiu, A. Sibidanov, F. Simon, R. J. Sobie, A. Soffer, A. Sokolov, E. Solovieva, S. Spataro, B. Spruck, M. Staric, S. Stefkova, R. Stroili, J. Strube, M. Sumihama, K. Sumisawa, W. Sutcliffe, S. Y. Suzuki, H. Svidras, M. Takahashi, M. Takizawa, U. Tamponi, S. Tanaka, K. Tanida, H. Tanigawa, N. Taniguchi, F. Tenchini, R. Tiwary, D. Tonelli, E. Torassa, N. Toutounji, K. Trabelsi, M. Uchida, K. Unger, Y. Unno, K. Uno, S. Uno, P. Urquijo, Y. Ushiroda, S. E. Vahsen, R. van Tonder, G. S. Varner, K. E. Varvell, A. Vinokurova, L. Vitale, V. Vobbilisetti, E. Waheed, H. M. Wakeling, E. Wang, M. -Z. Wang, X. L. Wang, A. Warburton, S. Watanuki, M. Welsch, C. Wessel, J. Wiechczynski, H. Windel, E. Won, X. P. Xu, B. D. Yabsley, S. Yamada, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, K. Yoshihara, Y. Yusa, Y. Zhang, V. Zhilich, Q. D. Zhou, V. I. Zhukova, R. Zlebcik

    PHYSICAL REVIEW LETTERS   130 ( 7 )   2023年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    An absolute measurement of the A+c lifetime is reported using A+c -> pK-pi+ decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the (sic)(4S) resonance, is 207.2 fb(-1). The result, tau(Lambda(+)(c)) = 203.20 10.89 10.77 fs, where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.

    DOI: 10.1103/PhysRevLett.130.071802

    Web of Science

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  • Measurement of two-photon decay width of χ<inf>c2</inf>(1P) in γγ → χ<inf>c2</inf>(1P) → J/ψγ at Belle

    Y. Seino, K. Hayasaka, S. Uehara, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Das, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, C. Hadjivasiliou, H. Hayashii, W. S. Hou, C. L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, H. Kakuno, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, T. Lam, J. S. Lange, S. C. Lee, C. H. Li, J. Li, L. K. Li, Y. Li

    Journal of High Energy Physics   2023 ( 1 )   2023年2月

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    掲載種別:研究論文(学術雑誌)  

    We report the measurement of the two-photon decay width of χc2(1P) in two-photon processes at the Belle experiment. We analyze the process γγ → χc2(1P) → J/ψγ, J/ψ → ℓ+ℓ− (ℓ = e or μ) using a data sample of 971 fb−1 collected with the Belle detector at the KEKB e+e− collider. In this analysis, the product of the two-photon decay width of χc2(1P) and the branching fraction is determined to be Γγγ(χc2(1P))B(χc2(1P)→J/ψγ)B(J/ψ→ℓ+ℓ−)=14.8±0.3(stat.)±0.7(syst.) eV, which corresponds to Γγγ(χc2(1P)) = 653 ± 13(stat.) ± 31(syst.) ± 17(B.R.) eV, where the third uncertainty is from B(χc2(1P) → J/ψγ) and B(J/ψ → ℓ+ℓ−). [Figure not available: see fulltext.].

    DOI: 10.1007/JHEP01(2023)160

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  • Evidence of a New Excited Charmed Baryon Decaying to Σ_{c}(2455)^{0,++}π^{±}. 国際誌

    Y B Li, C P Shen, I Adachi, H Aihara, D M Asner, H Atmacan, T Aushev, R Ayad, V Babu, S Bahinipati, P Behera, K Belous, J Bennett, M Bessner, V Bhardwaj, B Bhuyan, T Bilka, D Bodrov, J Borah, A Bozek, M Bračko, P Branchini, T E Browder, A Budano, M Campajola, D Červenkov, M-C Chang, P Chang, B G Cheon, K Chilikin, H E Cho, K Cho, S-J Cho, S-K Choi, Y Choi, S Choudhury, D Cinabro, S Das, G De Pietro, R Dhamija, F Di Capua, J Dingfelder, Z Doležal, T V Dong, D Dossett, D Epifanov, B G Fulsom, R Garg, V Gaur, A Garmash, A Giri, P Goldenzweig, E Graziani, T Gu, Y Guan, K Gudkova, C Hadjivasiliou, K Hayasaka, H Hayashii, W-S Hou, C-L Hsu, T Iijima, K Inami, N Ipsita, A Ishikawa, R Itoh, M Iwasaki, Y Iwasaki, W W Jacobs, E-J Jang, Q P Ji, S Jia, Y Jin, K K Joo, G Karyan, T Kawasaki, H Kichimi, C Kiesling, C H Kim, D Y Kim, K-H Kim, Y-K Kim, H Kindo, K Kinoshita, P Kodyš, T Konno, A Korobov, S Korpar, E Kovalenko, P Križan, P Krokovny, M Kumar, R Kumar, K Kumara, Y-J Kwon, T Lam, J S Lange, M Laurenza, S C Lee, C H Li, J Li, L K Li, Y Li, L Li Gioi, J Libby, K Lieret, D Liventsev, M Masuda, T Matsuda, D Matvienko, S K Maurya, F Meier, M Merola, F Metzner, K Miyabayashi, R Mizuk, G B Mohanty, I Nakamura, M Nakao, Z Natkaniec, A Natochii, L Nayak, M Niiyama, N K Nisar, S Nishida, S Ogawa, H Ono, P Oskin, P Pakhlov, G Pakhlova, S Pardi, H Park, S-H Park, S Patra, S Paul, T K Pedlar, R Pestotnik, L E Piilonen, T Podobnik, E Prencipe, M T Prim, N Rout, G Russo, S Sandilya, L Santelj, V Savinov, G Schnell, J Schueler, C Schwanda, Y Seino, K Senyo, M E Sevior, M Shapkin, C Sharma, J-G Shiu, J B Singh, A Sokolov, E Solovieva, M Starič, Z S Stottler, M Sumihama, T Sumiyoshi, W Sutcliffe, M Takizawa, U Tamponi, K Tanida, F Tenchini, K Trabelsi, T Tsuboyama, M Uchida, T Uglov, Y Unno, S Uno, Y Usov, R van Tonder, G Varner, K E Varvell, E Waheed, E Wang, M-Z Wang, M Watanabe, S Watanuki, O Werbycka, J Wiechczynski, E Won, B D Yabsley, W Yan, S B Yang, J Yelton, J H Yin, C Z Yuan, Y Yusa, Y Zhai, Z P Zhang, V Zhilich, V Zhukova

    Physical review letters   130 ( 3 )   031901 - 031901   2023年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We present the study of B[over ¯]^{0}→Σ_{c}(2455)^{0,++}π^{±}p[over ¯] decays based on 772×10^{6}  BB[over ¯] events collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. The Σ_{c}(2455)^{0,++} candidates are reconstructed via their decay to Λ_{c}^{+}π^{∓} and Λ_{c}^{+} decays to pK^{-}π^{+}, pK_{S}^{0}, and Λπ^{+} final states. The corresponding branching fractions are measured to be B(B[over ¯]^{0}→Σ_{c}(2455)^{0}π^{+}p[over ¯])=(1.09±0.06±0.07)×10^{-4} and B(B[over ¯]^{0}→Σ_{c}(2455)^{++}π^{-}p[over ¯])=(1.84±0.11±0.12)×10^{-4}, which are consistent with the world average values with improved precision. A new structure is found in the M_{Σ_{c}(2455)^{0,++}π^{± } } spectrum with a significance of 4.2σ including systematic uncertainty. The structure is possibly an excited Λ_{c}^{+} and is tentatively named Λ_{c}(2910)^{+}. Its mass and width are measured to be (2913.8±5.6±3.8)  MeV/c^{2} and (51.8±20.0±18.8)  MeV, respectively. The products of branching fractions for the Λ_{c}(2910)^{+} are measured to be B(B[over ¯]^{0}→Λ_{c}(2910)^{+}p[over ¯])×B(Λ_{c}(2910)^{+}→Σ_{c}(2455)^{0}π^{+})=(9.5±3.6±1.6)×10^{-6} and B(B[over ¯]^{0}→Λ_{c}(2910)^{+}p[over ¯])×B(Λ_{c}(2910)^{+}→Σ_{c}(2455)^{++}π^{-})=(1.24±0.35±0.10)×10^{-5}. Here, the first and second uncertainties are statistical and systematic, respectively.

    DOI: 10.1103/PhysRevLett.130.031901

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  • Study of e+e- →ηφ via initial state radiation at Belle

    W. J. Zhu, B. S. Gao, X. L. Wang, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, D. Epifanov, D. Ferlewicz, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, K. Hayasaka, H. Hayashii, C. L. Hsu, K. Inami, N. Ipsita, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, Q. P. Ji, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, K. Lalwani, T. Lam, M. Laurenza, S. C. Lee, J. Li, L. K. Li, Y. Li, L. Li Gioi, J. Libby, K. Lieret

    Physical Review D   107 ( 1 )   2023年1月

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    掲載種別:研究論文(学術雑誌)  

    Using 980 fb-1 of data collected on and around the (nS) (n=1, 2, 3, 4, 5) resonances with the Belle detector at the KEKB collider, we measure the cross section of e+e-→ηφ from threshold to 3.95 GeV via initial state radiation. There are clear φ(1680) and J/ψ signals but no significant φ(2170) signal in the ηφ final state. The branching fraction B[J/ψ→ηφ] is measured to be (7.2±0.8±0.5)×10-4. The resonant parameters of φ(1680) are determined to be mφ(1680)=(1696±8±10) MeV/c2 (statistical and systematic errors, respectively), Γφ(1680)=(175±13±16) MeV and, depending on the possible presence of predominantly constructive or destructive interference between φ(1680) and continuum production, Γφ(1680)e+e-·B[φ(1680)→ηφ] and B[φ(1680)→ηφ] are determined to be (75±10±11) eV and (25±12±2)% or (207±16±20) eV and (23±10±2)%, respectively. The upper limit for Γφ(2170)e+e-·B[φ(2170)→ηφ] is determined to be either 0.17 or 18.6 eV at the 90% confidence level.

    DOI: 10.1103/PhysRevD.107.012006

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  • Measurements of the branching fractions B (B ¯ 0 →d∗+π-) and B (B ¯ 0 →d∗+K-) and tests of QCD factorization

    J. F. Krohn, D. Ferlewicz, P. Urquijo, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. DoleŽal, T. V. Dong, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, P. Goldenzweig, B. Golob, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, T. Hara, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y. J. Kwon, T. Lam, M. Laurenza, S. C. Lee, J. Li

    Physical Review D   107 ( 1 )   2023年1月

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    掲載種別:研究論文(学術雑誌)  

    Using (771.6±10.6)×106 BB¯ meson pairs recorded by the Belle experiment at the KEKB e+e- collider, we report the branching fractions B(B¯0→D∗+π-)=(2.62±0.02±0.09)×10-3 and B(B¯0→D∗+K-)=(2.22±0.06±0.08)×10-4; the quoted uncertainties are statistical and systematic, respectively. A measurement of the ratio of these branching fractions is also presented, RK/π=B(B¯→D∗+K-)/B(B¯→D∗+π-)=(8.41±0.24±0.13)×10-2, where systematic uncertainties due to the D∗+ meson reconstruction cancel out. Furthermore, we report a new QCD factorization test based on the measured ratios for B¯→D∗+h- and B¯→D∗+ℓ-ν decays at squared momentum transfer values equivalent to the mass of the h=π or K hadron. The parameters |a1(h)| are measured to be |a1(π)|=0.884±0.004±0.003±0.016 and |a1(K)|=0.913±0.019±0.008±0.013, where the last uncertainties account for all external inputs. These values are approximately 15% lower than those expected from theoretical predictions. Subsequently, flavor SU(3) symmetry is tested by measuring the ratios for pions and kaons, |a1(K)|2/|a1(π)|2=1.066±0.042±0.018±0.023, as well as for different particle species. The ratio is consistent with unity and therefore no evidence for SU(3) symmetry breaking effects is found at the 5% precision level.

    DOI: 10.1103/PhysRevD.107.012003

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  • Search for the decay B<sup>0</sup><inf>s</inf>→η<sup>′</sup>K<sup>0</sup><inf>S</inf>

    T. Pang, V. Savinov, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, P. Behera, K. Belous, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, D. Dossett, S. Dubey, D. Epifanov, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, S. Halder, K. Hayasaka, H. Hayashii, M. T. Hedges, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, J. Kahn, D. Kalita, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kumar

    Physical Review D   106 ( 5 )   2022年9月

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    掲載種別:研究論文(学術雑誌)  

    We report the results of the first search for the decay B0s→η′K0S using 121.4 fb-1 of data collected at the Γ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe no signal and set a 90% confidence-level upper limit of 8.16×10-6 on the B0s→η′KS0 branching fraction.

    DOI: 10.1103/PhysRevD.106.L051103

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  • Measurement of the branching fractions of the B+ →ηâ "+νâ " and B+ →η′â "+νâ " decays with signal-side only reconstruction in the full q2 range

    U. Gebauer, C. Beleño, A. Frey, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M. C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, S. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan

    Physical Review D   106 ( 3 )   2022年8月

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    掲載種別:研究論文(学術雑誌)  

    The branching fractions of the decays B+→ηâ "+νâ "and B+→η′â "+νâ "are measured, where â "is either an electron or a muon, using a data sample of 711 fb-1 containing 772×106BB¯ pairs collected at the I (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e-collider. To reduce the dependence of the result on the form factor model, the measurement is performed over the entire q2 range. The resulting branching fractions are B(B+→ηâ "+νâ ")=(2.83±0.55(stat.)±0.34(syst.))×10-5 and B(B+→η′â "+νâ ")=(2.79±1.29(stat.)±0.30(syst.))×10-5.

    DOI: 10.1103/PhysRevD.106.032013

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  • Search for Z′ →μ+μ- in the Lμ-Lτ gauge-symmetric model at Belle

    T. Czank, I. Jaegle, A. Ishikawa, I. Adachi, K. Adamczyk, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, F. Bernlochner, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M. C. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. DoleŽal, T. V. Dong, S. Eidelman, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, Y. Guan, K. Gudkova, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, T. Higuchi, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, B. H. Kim, C. H. Kim, D. Y. Kim, K. H. Kim, S. H. Kim, Y. K. Kim, P. Kodyš, I. Komarov, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, K. Kumara

    Physical Review D   106 ( 1 )   2022年7月

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    掲載種別:研究論文(学術雑誌)  

    We search for a new gauge boson Z′ that couples only to heavy leptons and their corresponding neutrinos in the process e+e-→Z′(→μ+μ-)μ+μ-, using a 643 fb-1 data sample collected by the Belle experiment at or near the ϒ(1S,2S,3S,4S,5S) resonances at the KEKB collider. While previous searches for Z′ performed a data-based estimation of the initial state radiation effect, our search for the Z′ is the first to include effects due to initial state radiation in the signal simulated samples that were used in estimating the detection efficiency. No signal is observed in the Z′ mass range of 0.212-10 GeV/c2, and we set an upper limit on the coupling strength, g′, constraining the possible Z′ contribution to the anomalous magnetic dipole moment of the muon.

    DOI: 10.1103/PhysRevD.106.012003

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  • Flow-Path Fitting From Images With Fourier Basis For River Health Assessment 査読

    Yuki TAKAHASHI, Shogo MURAMATSU, Hiroyasu YASUDA, Kiyoshi HAYASAKA, Yu OTAKE

    Proc. of the IEEE International Conference in Image Processing (IEEE ICIP 2022)   2022年7月

  • Study of γγ →γψ (2S) at Belle

    X. L. Wang, B. S. Gao, W. J. Zhu, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, M. Campajola, D. Červenkov, M. C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, R. Dhamija, F. Di Capua, Z. DoleŽal, T. V. Dong, S. Eidelman, T. Ferber, D. Ferlewicz, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, C. Hadjivasiliou, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, J. Kahn, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, S. H. Kim, Y. K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, R. Kroeger, P. Krokovny, R. Kulasiri, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, P. Lewis

    Physical Review D   105 ( 11 )   2022年6月

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    掲載種別:研究論文(学術雑誌)  

    Using 980 fb-1 of data at and around the I (nS) (n=1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetric-energy e+e-collider, the two-photon process γγ→γψ(2S) is studied from the threshold to 4.2 GeV for the first time. Two structures are seen in the invariant mass distribution of γψ(2S): one at MR1=3922.4±6.5±2.0 MeV/c2 with a width of ΓR1=22±17±4 MeV, and another at MR2=4014.3±4.0±1.5 MeV/c2 with a width of ΓR2=4±11±6 MeV; the signals are parametrized with the incoherent sum of two Breit-Wigner functions. The first structure is consistent with the X(3915) or the χc2(3930), and the local statistical significance is determined to be 3.1σ with the systematic uncertainties included. The second matches none of the known charmonium or charmoniumlike states, and its global significance is determined to be 2.8σ including the look-elsewhere effect. The production rates are ΓγγB(R1→γψ(2S))=9.8±3.6±1.3 eV assuming (JPC,|λ|)=(0++,0) or 2.0±0.7±0.2 eV with (2++,2) for the first structure and ΓγγB(R2→γψ(2S))=6.2±2.2±0.8 eV with (0++,0) or 1.2±0.4±0.2 eV with (2++,2) for the second. Here, the first errors are statistical and the second systematic, and λ is the helicity.

    DOI: 10.1103/PhysRevD.105.112011

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  • First test of lepton flavor universality in the charmed baryon decays ωc0 → ω-ℓ+νℓ using data of the Belle experiment

    Y. B. Li, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, F. Bernlochner, M. Bessner, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, K. Gudkova, C. Hadjivasiliou, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, J. Kahn, K. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, K. T. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, R. Kroeger, P. Krokovny, M. Kumar, R. Kumar, K. Kumara

    Physical Review D   105 ( 9 )   2022年5月

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    掲載種別:研究論文(学術雑誌)  

    We present the first observation of the ωc0→ω-μ+νμ decay and present measurements of the branching fraction ratios of the ωc0→ω-ℓ+νℓ decays compared to the reference mode ωc0→ω-π+, (ℓ=e or μ). This analysis is based on 89.5 fb-1, 711 fb-1, and 121.1 fb-1 data samples collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at the center-of-mass energies of 10.52 GeV, 10.58 GeV, and 10.86 GeV, respectively. The ωc0 signal yields are extracted by fitting Mωℓ and Mωπ spectra. The branching fraction ratios B(ωc0→ω-e+νe)/B(ωc0→ω-π+) and B(ωc0→ω-μ+νμ)/B(ωc0→ω-π+) are measured to be 1.98±0.13(stat)±0.08(syst) and 1.94±0.18(stat)±0.10(syst), respectively. The ratio of B(ωc0→ω-e+νe)/B(ωc0→ω-μ+νμ) is measured to be 1.02±0.10(stat)±0.02(syst), which is consistent with the expectation of lepton flavor universality.

    DOI: 10.1103/PhysRevD.105.L091101

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  • Search for charged lepton flavor violating decays of ϒ (1S)

    S. Patra, V. Bhardwaj, K. Trabelsi, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, D. Epifanov, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez, Villanueva, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, K. T. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny

    Journal of High Energy Physics   2022 ( 5 )   2022年5月

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    掲載種別:研究論文(学術雑誌)  

    We present a search for the charged lepton-flavor-violating decays ϒ(1S) →ℓ±ℓ′∓ and radiative charged lepton-flavour-violating decays ϒ(1S) → γℓ±ℓ′∓ [ℓ,ℓ′ = e, μ, τ] using the 158 million ϒ(2S) sample collected by the Belle detector at the KEKB collider. This search uses ϒ(1S) mesons produced in ϒ(2S) → π+π− ϒ(1S) transitions. We do not find any significant signal, so we provide upper limits on the branching fractions at the 90% confidence level. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP05(2022)095

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  • Measurement of the branching fraction and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> asymmetry for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mover accent="true"><mml:mi>D</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mn>0</mml:mn></mml:msup><mml:mi>π</mml:mi></mml:math> decays

    T. Bloomfield, M. E. Sevior, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, M. Bessner, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M.-C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, S. Dubey, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, W.-S. Hou, C.-L. Hsu, T. Iijima, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, C. H. Kim, D. Y. Kim, H. J. Kim, S. H. Kim, Y.-K. Kim, T. D. Kimmel, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y.-J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, C. H. Li, J. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, T. Luo, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, S. Mohanty, H. K. Moon, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Ritter, A. Rostomyan, N. Rout, M. Rozanska, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, K. Sumisawa, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, M. Uchida, K. Uno, S. Uno, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, K. E. Varvell, A. Vossen, E. Waheed, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, M. Watanabe, S. Watanuki, O. Werbycka, J. Wiechczynski, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    Physical Review D   105 ( 7 )   2022年4月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.105.072007

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  • Measurement of Two-Particle Correlations of Hadrons in e+e-Collisions at Belle

    Y. C. Chen, Y. J. Lee, P. Chang, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Bodrov, J. Borah, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, V. Chekelian, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, T. V. Dong, D. Dossett, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, A. Giri, P. Goldenzweig, T. Gu, K. Gudkova, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, A. B. Kaliyar, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, R. Kroeger, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, Y. T. Lai, T. Lam, J. S. Lange, M. Laurenza, S. C. Lee, J. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, C. W. Lin, D. Liventsev, A. Martini, M. Masuda, T. Matsuda, D. Matvienko

    Physical Review Letters   128 ( 14 )   2022年4月

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    掲載種別:研究論文(学術雑誌)  

    The measurement of two-particle angular correlation functions in high-multiplicity e+e-collisions at s=10.52 GeV is reported. In this study, the 89.5 fb-1 of hadronic e+e-annihilation data collected by the Belle detector at KEKB are used. Two-particle angular correlation functions are measured in the full relative azimuthal angle (Δφ) and three units of pseudorapidity (Δη), defined by either the electron beam axis or the event-shape thrust axis, and are studied as a function of charged-particle multiplicity. The measurement in the thrust axis analysis, with mostly outgoing quark pairs determining the reference axis, is sensitive to the region of additional soft gluon emissions. No significant anisotropic collective behavior is observed with either coordinate analyses. Near-side jet correlations appear to be absent in the thrust axis analysis. The measurements are compared to predictions from various event generators and are expected to provide new constraints to the phenomenological models in the low-energy regime.

    DOI: 10.1103/PhysRevLett.128.142005

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  • An improved search for the electric dipole moment of the τ lepton

    K. Inami, K. Hayasaka, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, M. Bessner, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, S. Dubey, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, D. Greenwald, K. Gudkova, C. Hadjivasiliou, O. Hartbrich, H. Hayashii, M. T. Hedges, W.-S. Hou, C.-L. Hsu, T. Iijima, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E.-J. Jang, Y. Jin, C. W. Joo, K. K. Joo, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, S. H. Kim, Y.-K. Kim, T. D. Kimmel, K. Kinoshita, P. Kodyš, T. Konno, S. Korpar, P. Križan, R. Kroeger, P. Krokovny, R. Kulasiri, M. Kumar, R. Kumar, K. Kumara, Y.-J. Kwon, K. Lalwani, J. S. Lange, S. C. Lee, C. H. Li, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, S. Mohanty, T. J. Moon, M. Nakao, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, S.-H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, A. Rabusov, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, J.-G. Shiu, B. Shwartz, F. Simon, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, K. Sumisawa, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, S. Uno, Y. Ushiroda, R. Van Tonder, G. Varner, A. Vinokurova, C. H. Wang, E. Wang, P. Wang, M. Watanabe, S. Watanuki, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova

    Journal of High Energy Physics   2022 ( 4 )   2022年4月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Springer Science and Business Media LLC  

    Abstract

    We report a measurement of the electric dipole moment of the τ lepton (dτ) using an 833 fb<sup>−1</sup> data sample collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e<sup>+</sup>e<sup>−</sup> collider. Using an optimal observable method, we obtain the real and imaginary parts of d<sub>τ</sub> as Re(d<sub>τ</sub>) = (−0.62 ± 0.63) × 10<sup>−17</sup>ecm and Im(d<sub>τ</sub>) = (−0.40 ± 0.32) × 10<sup>−17</sup>ecm, respectively. These results are consistent with null electric dipole moment at the present level of experimental sensitivity and improve the sensitivity by about a factor of three.

    DOI: 10.1007/jhep04(2022)110

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  • First measurement of the $$ {\Lambda}_c^{+} $$ → pη′ decay

    S. X. Li, J. X. Cui, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, P. Behera, K. Belous, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, T. Gu, T. Hara, K. Hayasaka, H. Hayashii, W.-S. Hou, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y.-J. Kwon, T. Lam, M. Laurenza, S. C. Lee, J. Li, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, A. Martini, M. Masuda, T. Matsuda, D. Matvienko, S. K. Maurya, F. Meier, M. Merola, K. Miyabayashi, R. Mizuk, R. Mussa, M. Nakao, D. Narwal, Z. Natkaniec, A. Natochii, L. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, S.-H. Park, S. Patra, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, M. T. Prim, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, V. Shebalin, J.-G. Shiu, B. Shwartz, F. Simon, E. Solovieva, S. Stanič, M. Starič, Z. S. Stottler, M. Sumihama, K. Sumisawa, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, Y. Unno, K. Uno, S. Uno, P. Urquijo, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, D. Wang, E. Wang, M.-Z. Wang, S. Watanuki, E. Won, X. Xu, B. D. Yabsley, W. Yan, H. Ye, J. H. Yin, Y. Yusa, Y. Zhai, V. Zhilich, V. Zhukova

    Journal of High Energy Physics   2022 ( 3 )   2022年3月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Springer Science and Business Media LLC  

    Abstract

    We present the first measurement of the branching fraction of the singly Cabibbo-suppressed (SCS) decay $$ {\Lambda}_c^{+} $$→ pη′ with η′ → ηπ<sup>+</sup>π<sup>−</sup>, using a data sample corresponding to an integrated luminosity of 981 fb<sup>−1</sup>, collected by the Belle detector at the KEKB e<sup>+</sup>e<sup>−</sup> asymmetric-energy collider. A significant $$ {\Lambda}_c^{+} $$→ pη′ signal is observed for the first time with a signal significance of 5.4σ. The relative branching fraction with respect to the normalization mode $$ {\Lambda}_c^{+} $$→ pK<sup>−</sup>π<sup>+</sup> is measured to be$$ \frac{\mathcal{B}\left({\Lambda}_c^{+}\to p\eta^{\prime}\right)}{\mathcal{B}\left({\Lambda}_c^{+}\to {pK}^{-}{\pi}^{+}\right)}=\left(7.54\pm 1.32\pm 0.73\right)\times {10}^{-3}, $$

    where the uncertainties are statistical and systematic, respectively. Using the world-average value of $$ \mathcal{B}\left({\Lambda}_c^{+}\to {pK}^{-}{\pi}^{+}\right) $$ = (6.28 ± 0.32) × 10<sup>−2</sup>, we obtain$$ \mathcal{B}\left({\Lambda}_c^{+}\to p\eta^{\prime}\right)=\left(4.73\pm 0.82\pm 0.46\pm 0.24\right)\times {10}^{-4}, $$

    where the uncertainties are statistical, systematic, and from $$ \mathcal{B}\left({\Lambda}_c^{+}\to {pK}^{-}{\pi}^{+}\right) $$, respectively.

    DOI: 10.1007/jhep03(2022)090

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    その他リンク: https://link.springer.com/article/10.1007/JHEP03(2022)090/fulltext.html

  • Capture method for digital twin of formation processes of sand bars 査読

    Daichi Moteki, Takenori Murai, Tsuyoshi Hoshino, Hiroyasu Yasuda, Shogo Muramatsu, Kiyoshi Hayasaka

    Physics of Fluids   34 ( 034117 )   034117 - 034117   2022年3月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1063/5.0085574

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  • Search for a Light Higgs Boson in Single-Photon Decays of ϒ (1S) Using ϒ (2S) →π+π- ϒ (1S) Tagging Method

    S. Jia, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. DoleŽal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, Y. Guan, K. Gudkova, C. Hadjivasiliou, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, Y. Jin, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, S. Kohani, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, R. Kroeger, P. Krokovny, M. Kumar, R. Kumar, K. Kumara

    Physical Review Letters   128 ( 8 )   2022年2月

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    掲載種別:研究論文(学術雑誌)  

    We search for a light Higgs boson (A0) decaying into a τ+τ- or μ+μ- pair in the radiative decays of ϒ(1S). The production of ϒ(1S) mesons is tagged by ϒ(2S)→π+π-ϒ(1S) transitions, using 158×106 ϒ(2S) events accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant A0 signals in the mass range from the τ+τ- or μ+μ- threshold to 9.2 GeV/c2 are observed. We set the upper limits at 90% credibility level (C.L.) on the product branching fractions for ϒ(1S)→γA0 and A0→τ+τ- varying from 3.8×10-6 to 1.5×10-4. Our results represent an approximately twofold improvement on the current world best upper limits for the ϒ(1S)→γA0(→τ+τ-) production. For A0→μ+μ-, the upper limits on the product branching fractions for ϒ(1S)→γA0 and A0→μ+μ- are at the same level as the world average limits, and vary from 3.1×10-7 to 1.6×10-5. The upper limits at 90% credibility level on the Yukawa coupling fϒ(1S) and mixing angle sinθA0 are also given.

    DOI: 10.1103/PhysRevLett.128.081804

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  • Search for tetraquark states Xcc s- s- in Ds+ Ds+ (Ds∗+ Ds∗+) final states at Belle

    X. Y. Gao, Y. Li, C. P. Shen, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, P. Behera, K. Belous, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, A. Bobrov, D. Bodrov, G. Bonvicini, J. Borah, A. Bozek, M. Bračko, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, D. Dossett, D. Epifanov, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, Y. K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara

    Physical Review D   105 ( 3 )   2022年2月

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    掲載種別:研究論文(学術雑誌)  

    A search for double-heavy tetraquark state candidates Xccs¯s¯ decaying to Ds+Ds+ and Ds∗+Ds∗+ is presented for the first time using the data samples of 102×106 ϒ(1S) and 158×106 ϒ(2S) events, and the data samples at s=10.52, 10.58, and 10.867 GeV corresponding to integrated luminosities of 89.5, 711.0, and 121.4 fb-1, respectively, accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. The invariant-mass spectra of the Ds+Ds+ and Ds∗+Ds∗+ are studied to search for possible resonances. No significant signals are observed, and the 90% confidence level upper limits on the product branching fractions [B(ϒ(1S,2S)→Xccs¯s¯+anything)×B(Xccs¯s¯→Ds+Ds+(Ds∗+Ds∗+))] in ϒ(1S,2S) inclusive decays and the product values of Born cross section and branching fraction [σ(e+e-→Xccs¯s¯+anything)×B(Xccs¯s¯→Ds+Ds+(Ds∗+Ds∗+))] in e+e- collisions at s=10.52, 10.58, and 10.867 GeV under different assumptions of Xccs¯s¯ masses and widths are obtained.

    DOI: 10.1103/PhysRevD.105.032002

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  • Study of B¯0→D+h−(h=K/π) decays at Belle

    E. Waheed, P. Urquijo, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, H. Kichimi, C. H. Kim, D. Y. Kim, K.-H. Kim, K. T. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, M. Kumar, R. Kumar, K. Kumara, Y.-J. Kwon, Y.-T. Lai, J. S. Lange, M. Laurenza, S. C. Lee, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, R. Mussa, M. Nakao, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, H. Park, S.-H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, F. Simon, J. B. Singh, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, K. Uno, S. Uno, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, X. L. Wang, J. Wiechczynski, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   105 ( 1 )   2022年1月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.105.012003

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  • Measurement of B(Bs→DsX) with Bs semileptonic tagging

    B. Wang, K. Kinoshita, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, P. Behera, C. Beleño, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, A. Chen, K. Chilikin, H. E. Cho, K. Cho, S.-K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, F. Di Capua, S. Di Carlo, Z. Doležal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, Y. Guan, K. Hayasaka, H. Hayashii, W.-S. Hou, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, S. Jia, Y. Jin, D. Joffe, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, C. Kiesling, D. Y. Kim, K. T. Kim, S. H. Kim, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, A. Kuzmin, Y.-J. Kwon, J. S. Lange, I. S. Lee, J. Y. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, T. Luo, J. MacNaughton, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, R. Mizuk, G. B. Mohanty, R. Mussa, M. Nakao, K. J. Nath, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, Y. Onuki, G. Pakhlova, B. Pal, T. Pang, S. Pardi, H. Park, S.-H. Park, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, V. Popov, E. Prencipe, M. Prim, M. Ritter, A. Rostomyan, G. Russo, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, V. Shebalin, J.-G. Shiu, A. Sokolov, E. Solovieva, M. Starič, J. F. Strube, T. Sumiyoshi, M. Takizawa, K. Tanida, F. Tenchini, T. Uglov, S. Uno, Y. Usov, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, C. H. Wang, M.-Z. Wang, P. Wang, O. Werbycka, E. Won, S. B. Yang, H. Ye, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    Physical Review D   105 ( 1 )   2022年1月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.105.012004

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.105.012004/fulltext

  • Search for the decay B-s(0) -> eta eta

    B. Bhuyan, K. J. Nath, J. Borah, Adachi, I, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, Aulchenko, V, T. Aushev, R. Ayad, Babu, V, Badhrees, I, A. M. Bakich, P. Behera, J. Bennett, Bhardwaj, V, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, Chekelian, V, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S-K Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, F. Di Capua, S. Di Carlo, Z. Dolezal, T. Dong, S. Dubey, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, Gaur, V, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, J. Haba, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, W-S Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Joffe, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, R. Kroeger, P. Krokovny, R. Kumar, A. Kuzmin, Y-J Kwon, J. S. Lange, J. K. Lee, J. Y. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, P-C Lu, T. Luo, J. MacNaughton, C. MacQueen, M. Masuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, T. Mori, R. Mussa, T. Nakano, M. Nakao, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, Y. Onuki, P. Pakhlov, G. Pakhlova, B. Pal, T. Pang, S. Pardi, H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, Popov, V, E. Prencipe, M. Ritter, A. Rostomyan, G. Russo, Y. Sakai, M. Salehi, S. Sandilya, L. Santelj, T. Sanuki, Savinov, V, O. Schneider, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, Shebalin, V, C. P. Shen, J-G Shiu, E. Solovieva, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vossen, C. H. Wang, M-Z Wang, P. Wang, J. Wiechczynski, E. Won, S. B. Yang, H. Ye, J. H. Yin, Y. Yusa, Z. P. Zhang, Zhilich, V, Zhukova, V

    PHYSICAL REVIEW D   105 ( 1 )   2022年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report results from a search for the decay B-s(0) -> eta eta using 121.4 fb(-1) of data collected at the Upsilon(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We do not observe any signal and set an upper limit on the branching fraction of 14.3 x 10(-5) at 90% confidence level. This result represents a significant improvement over the previous most stringent limit.

    DOI: 10.1103/PhysRevD.105.012007

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  • Measurements of q2 moments of inclusive B→Xcℓ+νℓ decays with hadronic tagging

    R. van Tonder, L. Cao, W. Sutcliffe, M. Welsch, F. U. Bernlochner, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bračko, P. Branchini, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, S. Dubey, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Konno, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, J. S. Lange, M. Laurenza, S. C. Lee, P. Lewis, C. H. Li, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, S. Mohanty, M. Mrvar, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, S.-H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, A. Rabusov, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, L. Santelj, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, G. Varner, K. E. Varvell, E. Waheed, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, X. L. Wang, M. Watanabe, S. Watanuki, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   104 ( 11 )   2021年12月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.104.112011

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.104.112011/fulltext

  • Measurement of Differential Branching Fractions of Inclusive <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msub><mml:mi>X</mml:mi><mml:mi>u</mml:mi></mml:msub><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>+</mml:mo></mml:msup><mml:msub><mml:mi>ν</mml:mi><mml:mo>ℓ</mml:mo></mml:msub></mml:math> Decays

    L. Cao, W. Sutcliffe, R. Van Tonder, F. U. Bernlochner, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, J. Biswal, A. Bobrov, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, P. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, T. Czank, N. Dash, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, S. Dubey, D. Epifanov, T. Ferber, D. Ferlewicz, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, T. Gu, K. Gudkova, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, M. Hernandez Villanueva, W.-S. Hou, C.-L. Hsu, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, K. K. Joo, J. Kahn, K. H. Kang, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, S. H. Kim, Y.-K. Kim, T. D. Kimmel, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, S. C. Lee, C. H. Li, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, S. Mohanty, M. Mrvar, M. Nakao, A. Natochii, L. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Röhrken, A. Rostomyan, N. Rout, M. Rozanska, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, M. Starič, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, S. Uno, P. Urquijo, S. E. Vahsen, G. Varner, K. E. Varvell, E. Waheed, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, X. L. Wang, M. Watanabe, S. Watanuki, O. Werbycka, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review Letters   127 ( 26 )   2021年12月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevlett.127.261801

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  • Study of e+e−→ϒ(1S,2S)η and e+e−→ϒ(1S)η′ at s=10.866  GeV with the Belle detector

    E. Kovalenko, A. Garmash, P. Krokovny, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, M. Bessner, T. Bilka, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M.-C. Chang, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, F. Di Capua, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Giri, P. Goldenzweig, D. Greenwald, K. Gudkova, C. Hadjivasiliou, T. Hara, K. Hayasaka, W.-S. Hou, C.-L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, Y. Jin, K. K. Joo, G. Karyan, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, S. H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, P. Križan, R. Kroeger, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, K. Lalwani, J. S. Lange, S. C. Lee, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Nakao, A. Natochii, L. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, A. Rabusov, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, T. Sanuki, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, C. Sharma, J.-G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, K. Uno, S. Uno, P. Urquijo, Y. Usov, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, C. H. Wang, M.-Z. Wang, P. Wang, M. Watanabe, O. Werbycka, E. Won, W. Yan, S. B. Yang, H. Ye, J. H. Yin, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   104 ( 11 )   2021年12月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.104.112006

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.104.112006/fulltext

  • Search for B^{+}→K^{+}νν[over ¯] Decays Using an Inclusive Tagging Method at Belle II. 国際誌

    F Abudinén, I Adachi, K Adamczyk, P Ahlburg, H Aihara, N Akopov, A Aloisio, N Anh Ky, D M Asner, H Atmacan, T Aushev, V Aushev, A Baur, V Babu, S Baehr, P Bambade, Sw Banerjee, S Bansal, J Baudot, J Becker, P K Behera, J V Bennett, E Bernieri, F U Bernlochner, M Bertemes, E Bertholet, M Bessner, S Bettarini, F Bianchi, T Bilka, D Biswas, A Bozek, M Bračko, P Branchini, N Braun, T E Browder, A Budano, S Bussino, M Campajola, L Cao, G Casarosa, C Cecchi, D Červenkov, P Chang, R Cheaib, V Chekelian, C Chen, Y-T Chen, B G Cheon, K Chilikin, K Chirapatpimol, K Cho, S-J Cho, S Choudhury, D Cinabro, L Corona, L M Cremaldi, S Cunliffe, T Czank, F Dattola, E De La Cruz-Burelo, G de Marino, G De Nardo, M De Nuccio, G De Pietro, R de Sangro, M Destefanis, S Dey, A De Yta-Hernandez, A Di Canto, F Di Capua, J Dingfelder, Z Doležal, I Domínguez Jiménez, T V Dong, K Dort, S Dubey, S Duell, G Dujany, S Eidelman, M Eliachevitch, D Epifanov, T Ferber, D Ferlewicz, T Fillinger, G Finocchiaro, S Fiore, A Fodor, F Forti, A Frey, B G Fulsom, N Gabyshev, E Ganiev, M Garcia-Hernandez, A Garmash, V Gaur, A Gaz, A Gellrich, R Giordano, A Giri, A Glazov, B Gobbo, R Godang, P Goldenzweig, B Golob, P Grace, W Gradl, E Graziani, D Greenwald, Y Guan, K Gudkova, C Hadjivasiliou, S Halder, K Hara, O Hartbrich, K Hayasaka, H Hayashii, S Hazra, C Hearty, I Heredia de la Cruz, M Hernández Villanueva, A Hershenhorn, T Higuchi, E C Hill, H Hirata, M Hoek, M Hohmann, C-L Hsu, T Humair, T Iijima, K Inami, G Inguglia, J Irakkathil Jabbar, A Ishikawa, R Itoh, M Iwasaki, Y Iwasaki, P Jackson, W W Jacobs, D E Jaffe, Y Jin, C Joo, H Junkerkalefeld, A B Kaliyar, J Kandra, K H Kang, R Karl, G Karyan, T Kawasaki, C Ketter, H Kichimi, C Kiesling, C-H Kim, D Y Kim, Y-K Kim, T D Kimmel, P Kodyš, T Koga, S Kohani, T Konno, A Korobov, S Korpar, E Kovalenko, T M G Kraetzschmar, F Krinner, P Križan, P Krokovny, T Kuhr, J Kumar, M Kumar, R Kumar, K Kumara, T Kunigo, S Kurz, A Kuzmin, Y-J Kwon, S Lacaprara, Y-T Lai, C La Licata, L Lanceri, J S Lange, M Laurenza, K Lautenbach, F R Le Diberder, S C Lee, P Leitl, D Levit, P M Lewis, C Li, L K Li, S X Li, Y B Li, J Libby, K Lieret, Z Liptak, Q Y Liu, D Liventsev, S Longo, A Lozar, T Lueck, C Lyu, M Maggiora, S Maity, R Manfredi, E Manoni, S Marcello, C Marinas, A Martini, M Masuda, T Matsuda, K Matsuoka, D Matvienko, F Meier, M Merola, F Metzner, M Milesi, C Miller, K Miyabayashi, H Miyake, R Mizuk, G B Mohanty, H-G Moser, M Mrvar, F J Müller, C Murphy, R Mussa, K R Nakamura, M Nakao, Z Natkaniec, A Natochii, M Nayak, G Nazaryan, C Niebuhr, N K Nisar, S Nishida, K Nishimura, S Ogawa, Y Onishchuk, H Ono, Y Onuki, P Oskin, H Ozaki, P Pakhlov, G Pakhlova, A Paladino, T Pang, A Panta, E Paoloni, S Pardi, H Park, S-H Park, B Paschen, A Passeri, A Pathak, S Patra, S Paul, T K Pedlar, I Peruzzi, R Pestotnik, M Piccolo, L E Piilonen, P L M Podesta-Lerma, T Podobnik, S Pokharel, G Polat, V Popov, C Praz, S Prell, E Prencipe, M T Prim, N Rad, P Rados, S Raiz, M Remnev, I Ripp-Baudot, M Ritter, G Rizzo, L B Rizzuto, S H Robertson, D Rodríguez Pérez, J M Roney, A Rostomyan, N Rout, G Russo, D Sahoo, D A Sanders, S Sandilya, A Sangal, L Santelj, Y Sato, V Savinov, B Scavino, J Schueler, C Schwanda, A J Schwartz, R M Seddon, Y Seino, A Selce, K Senyo, J Serrano, M E Sevior, C Sfienti, J-G Shiu, B Shwartz, A Sibidanov, F Simon, R J Sobie, A Soffer, A Sokolov, E Solovieva, S Spataro, B Spruck, M Starič, S Stefkova, Z S Stottler, R Stroili, M Sumihama, K Sumisawa, D J Summers, W Sutcliffe, S Y Suzuki, H Svidras, M Tabata, M Takahashi, M Takizawa, U Tamponi, S Tanaka, K Tanida, H Tanigawa, N Taniguchi, P Taras, F Tenchini, D Tonelli, E Torassa, N Toutounji, K Trabelsi, M Uchida, Y Unno, K Uno, S Uno, P Urquijo, Y Ushiroda, Y V Usov, S E Vahsen, R van Tonder, G S Varner, K E Varvell, A Vinokurova, L Vitale, B Wach, E Waheed, H M Wakeling, W Wan Abdullah, M-Z Wang, X L Wang, A Warburton, S Watanuki, J Webb, M Welsch, C Wessel, J Wiechczynski, H Windel, X P Xu, B D Yabsley, S Yamada, W Yan, S B Yang, H Ye, J Yelton, J H Yin, Y M Yook, K Yoshihara, C Z Yuan, Y Yusa, L Zani, V Zhilich, Q D Zhou, X Y Zhou, V I Zhukova

    Physical review letters   127 ( 18 )   181802 - 181802   2021年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    A search for the flavor-changing neutral-current decay B^{+}→K^{+}νν[over ¯] is performed at the Belle II experiment at the SuperKEKB asymmetric energy electron-positron collider. The data sample corresponds to an integrated luminosity of 63  fb^{-1} collected at the ϒ(4S) resonance and a sample of 9  fb^{-1} collected at an energy 60 MeV below the resonance. Because the measurable decay signature involves only a single charged kaon, a novel measurement approach is used that exploits not only the properties of the B^{+}→K^{+}νν[over ¯] decay, but also the inclusive properties of the other B meson in the ϒ(4S)→BB[over ¯] event, to suppress the background from other B meson decays and light-quark pair production. This inclusive tagging approach offers a higher signal efficiency compared to previous searches. No significant signal is observed. An upper limit on the branching fraction of B^{+}→K^{+}νν[over ¯] of 4.1×10^{-5} is set at the 90% confidence level.

    DOI: 10.1103/PhysRevLett.127.181802

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  • Search for lepton-flavor-violating tau-lepton decays to ℓγ at Belle

    K. Uno, K. Hayasaka, K. Inami, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, J. Bennett, F. Bernlochner, M. Bessner, V. Bhardwaj, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, M. Campajola, D. Červenkov, M.-C. Chang, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, C. Hadjivasiliou, T. Hara, O. Hartbrich, H. Hayashii, M. Hernandez Villanueva, W.-S. Hou, C.-L. Hsu, T. Iijima, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, Y. Jin, K. K. Joo, K. H. Kang, Y. Kato, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, S. H. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, Y.-T. Lai, J. S. Lange, S. C. Lee, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, K. Matsuoka, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Nakao, H. Nakazawa, A. Natochii, L. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, K. Ogawa, S. Ogawa, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, S. Paul, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, C. Sharma, C. P. Shen, J.-G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, A. Vossen, E. Waheed, C. H. Wang, E. Wang, M.-Z. Wang, X. L. Wang, O. Werbycka, E. Won, B. D. Yabsley, W. Yan, H. Ye, J. H. Yin, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova

    Journal of High Energy Physics   2021 ( 10 )   2021年10月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Springer Science and Business Media LLC  

    Abstract

    Charged lepton flavor violation is forbidden in the Standard Model but possible in several new physics scenarios. In many of these models, the radiative decays τ<sup>±</sup> → ℓ<sup>±</sup>γ (ℓ = e, μ) are predicted to have a sizeable probability, making them particularly interesting channels to search at various experiments. An updated search via τ<sup>±</sup> → ℓ<sup>±</sup>γ using full data of the Belle experiment, corresponding to an integrated luminosity of 988 fb<sup>−1</sup>, is reported for charged lepton flavor violation. No significant excess over background predictions from the Standard Model is observed, and the upper limits on the branching fractions, $$ \mathcal{B} $$(τ<sup>±</sup> → μ<sup>±</sup>γ) ≤ 4.2 × 10<sup>−8</sup> and $$ \mathcal{B} $$(τ<sup>±</sup> → e<sup>±</sup>γ) ≤ 5.6 × 10<sup>−8</sup>, are set at 90% confidence level.

    DOI: 10.1007/jhep10(2021)019

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    その他リンク: https://link.springer.com/article/10.1007/JHEP10(2021)019/fulltext.html

  • Measurement of the branching fraction of Lambda(+)(c) -> p omega decay at Belle

    S. X. Li, L. K. Li, C. P. Shen, Adachi, I, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, P. Behera, K. Belous, J. Bennett, M. Bessner, Bhardwaj, V, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bracko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Cervenkov, M-C Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S-J Cho, S-K Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Dolezal, T. Dong, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, Gaur, V, N. Gabyshev, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, T. Gu, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, W-S Hou, C-L Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, Y. Kato, H. Kichimi, C. H. Kim, D. Y. Kim, K-H Kim, K. T. Kim, Y-K Kim, K. Kinoshita, P. Kodys, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Krizan, R. Kroeger, P. Krokovny, R. Kumar, K. Kumara, Y-J Kwon, Y-T Lai, J. S. Lange, M. Laurenza, S. C. Lee, J. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, R. Mizuk, R. Mussa, M. Nakao, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, H. Park, S-H Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, Popov, V, E. Prencipe, M. T. Prim, M. Rohrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, L. Santelj, T. Sanuki, Savinov, V, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, J-G Shiu, F. Simon, A. Sokolov, E. Solovieva, M. Staric, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, K. Uno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, C. H. Wang, E. Wang, M-Z Wang, P. Wang, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, Y. Yusa, Z. P. Zhang, Zhilich, V, Zhukova, V

    PHYSICAL REVIEW D   104 ( 7 )   2021年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using 980.6 fb(-1) of data collected with the Belle detector operating at the KEKB asymmetric-energy e(+)e(-), we present a measurement of the branching fraction of the singly Cabibbo-suppressed decay Lambda(+)(c) -> p omega. A clear Lambda(+)(c) signal is observed for Lambda(+)(c) -> p omega with a statistical significance of 9.1 standard deviations, and we measure the ratio of branching fractions B(Lambda(+)(c) -> p omega)/Bo(Lambda(+)(c) -> p omega)/B(Lambda(+)(c) -> pK(-)pi(+)) = (1.32 +/- 0.12(stat) +/- 0.10(syst)) x 10(-2), from which we infer the branching fraction, B(Lambda(+)(c) -> p omega) = (8.27 +/- 0.75(stat) +/- 0.62(syst) +/- 0.42(ref) x 10(-4). The first quoted uncertainty is statistical, the second systematic, and the third from the reference mode Lambda(+)(c) -> pK(-) pi(+).

    DOI: 10.1103/PhysRevD.104.072008

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  • Measurements of the Branching Fractions of the Semileptonic Decays Ξ_{c}^{0}→Ξ^{-}ℓ^{+}ν_{ℓ} and the Asymmetry Parameter of Ξ_{c}^{0}→Ξ^{-}π^{+}. 国際誌

    Y B Li, C P Shen, I Adachi, K Adamczyk, H Aihara, S Al Said, D M Asner, T Aushev, R Ayad, V Babu, P Behera, J Bennett, M Bessner, V Bhardwaj, B Bhuyan, T Bilka, J Biswal, G Bonvicini, A Bozek, M Bračko, T E Browder, M Campajola, D Červenkov, M-C Chang, A Chen, B G Cheon, K Chilikin, K Cho, S-J Cho, S-K Choi, Y Choi, S Choudhury, D Cinabro, S Cunliffe, S Das, N Dash, G De Nardo, R Dhamija, F Di Capua, T V Dong, S Eidelman, D Epifanov, T Ferber, B G Fulsom, R Garg, V Gaur, N Gabyshev, A Garmash, A Giri, P Goldenzweig, O Grzymkowska, K Gudkova, C Hadjivasiliou, O Hartbrich, K Hayasaka, H Hayashii, M Hernandez Villanueva, C-L Hsu, A Ishikawa, R Itoh, M Iwasaki, Y Iwasaki, W W Jacobs, S Jia, Y Jin, C W Joo, K K Joo, K H Kang, G Karyan, Y Kato, H Kichimi, C H Kim, D Y Kim, K-H Kim, S H Kim, K Kinoshita, P Kodyš, T Konno, A Korobov, S Korpar, E Kovalenko, P Križan, R Kroeger, P Krokovny, T Kuhr, M Kumar, R Kumar, K Kumara, A Kuzmin, Y-J Kwon, K Lalwani, J S Lange, I S Lee, S C Lee, C H Li, L K Li, L Li Gioi, J Libby, K Lieret, D Liventsev, M Masuda, D Matvienko, J T McNeil, F Metzner, R Mizuk, G B Mohanty, T J Moon, T Mori, R Mussa, A Natochii, L Nayak, M Nayak, M Niiyama, N K Nisar, S Nishida, K Nishimura, S Ogawa, H Ono, Y Onuki, P Pakhlov, G Pakhlova, T Pang, S Pardi, H Park, S Patra, S Paul, T K Pedlar, R Pestotnik, L E Piilonen, T Podobnik, V Popov, E Prencipe, M T Prim, M Röhrken, A Rostomyan, N Rout, G Russo, D Sahoo, Y Sakai, S Sandilya, L Santelj, T Sanuki, V Savinov, G Schnell, C Schwanda, Y Seino, K Senyo, M Shapkin, C Sharma, J-G Shiu, A Sokolov, E Solovieva, M Starič, Z S Stottler, M Sumihama, U Tamponi, K Tanida, F Tenchini, M Uchida, S Uehara, T Uglov, K Uno, S Uno, Y Usov, R Van Tonder, G Varner, A Vinokurova, A Vossen, C H Wang, M-Z Wang, P Wang, X L Wang, M Watanabe, S Watanuki, E Won, X Xu, W Yan, S B Yang, H Ye, J H Yin, C Z Yuan, Z P Zhang, V Zhilich, V Zhukova

    Physical review letters   127 ( 12 )   121803 - 121803   2021年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Using data samples of 89.5 and 711  fb^{-1} recorded at energies of sqrt[s]=10.52 and 10.58 GeV, respectively, with the Belle detector at the KEKB e^{+}e^{-} collider, we report measurements of branching fractions of semileptonic decays Ξ_{c}^{0}→Ξ^{-}ℓ^{+}ν_{ℓ} (ℓ=e or μ) and the CP-asymmetry parameter of Ξ_{c}^{0}→Ξ^{-}π^{+} decay. The branching fractions are measured to be B(Ξ_{c}^{0}→Ξ^{-}e^{+}ν_{e})=(1.31±0.04±0.07±0.38)% and B(Ξ_{c}^{0}→Ξ^{-}μ^{+}ν_{μ})=(1.27±0.06±0.10±0.37)%, and the decay parameter α_{Ξπ} is measured to be 0.63±0.03±0.01 with much improved precision compared with the current world average. The corresponding ratio B(Ξ_{c}^{0}→Ξ^{-}e^{+}ν_{e})/B(Ξ_{c}^{0}→Ξ^{-}μ^{+}ν_{μ}) is 1.03±0.05±0.07, which is consistent with the expectation of lepton flavor universality. The first measured asymmetry parameter A_{CP}=(α_{Ξ^{-}π^{+ } }+α_{Ξ[over ¯]^{+}π^{- } })/(α_{Ξ^{-}π^{+ } }-α_{Ξ[over ¯]^{+}π^{- } })=0.024±0.052±0.014 is found to be consistent with zero. The first and the second uncertainties above are statistical and systematic, respectively, while the third ones arise due to the uncertainty of the Ξ_{c}^{0}→Ξ^{-}π^{+} branching fraction.

    DOI: 10.1103/PhysRevLett.127.121803

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  • Measurement of the masses and widths of the Σc(2455)+ and Σc(2520)+ baryons

    J. Yelton, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, Y. Kato, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, S. H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, K. Kumara, Y.-J. Kwon, J. S. Lange, M. Laurenza, S. C. Lee, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, J. T. McNeil, M. Merola, K. Miyabayashi, R. Mizuk, G. B. Mohanty, T. J. Moon, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, K. Sumisawa, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, C. H. Wang, D. Wang, E. Wang, M.-Z. Wang, P. Wang, M. Watanabe, S. Watanuki, E. Won, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   104 ( 5 )   2021年9月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.104.052003

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.104.052003/fulltext

  • Measurement of branching fractions and search for CP violation in D0 → π+π−η, D0 → K+K−η, and D0 → ϕη at Belle

    L. K. Li, A. J. Schwartz, K. Kinoshita, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, M. Bessner, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M.-C. Chang, P. Chang, V. Chekelian, A. Chen, Y. Q. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, A. Giri, P. Goldenzweig, B. Golob, E. Graziani, T. Gu, Y. Guan, C. Hadjivasiliou, S. Halder, K. Hayasaka, W.-S. Hou, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, S. H. Kim, Y.-K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, K. Lalwani, M. Laurenza, S. C. Lee, C. H. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, M. Masuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, T. Mori, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, S.-H. Park, A. Passeri, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, M. Takizawa, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, K. Uno, S. Uno, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, C. H. Wang, M.-Z. Wang, P. Wang, X. L. Wang, S. Watanuki, E. Won, B. D. Yabsley, W. B. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova

    Journal of High Energy Physics   2021 ( 9 )   2021年9月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Springer Science and Business Media LLC  

    Abstract

    We measure the branching fractions and CP asymmetries for the singly Cabibbo-suppressed decays D<sup>0</sup> → π<sup>+</sup>π<sup>−</sup>η, D<sup>0</sup> → K<sup>+</sup>K<sup>−</sup>η, and D<sup>0</sup> → ϕη, using 980 fb<sup>−1</sup> of data from the Belle experiment at the KEKB e<sup>+</sup>e<sup>−</sup> collider. We obtain$$ {\displaystyle \begin{array}{c}\mathcal{B}\left({D}^0\to {\pi}^{+}{\pi}^{-}\eta \right)=\left[1.22\pm 0.02\left(\mathrm{stat}\right)\pm 0.02\left(\mathrm{syst}\right)\pm 0.03\left({\mathcal{B } }_{\mathrm{ref } }\right)\right]\times {10}^{-3},\\ {}\mathcal{B}\left({D}^0\to {K}^{+}{K}^{-}\eta \right)=\left[{1.80}_{-0.06}^{+0.07}\left(\mathrm{stat}\right)\pm 0.04\left(\mathrm{syst}\right)\pm 0.05\left({\mathcal{B } }_{\mathrm{ref } }\right)\right]\times {10}^{-4},\\ {}\mathcal{B}\left({D}^0\to \phi \eta \right)=\left[1.84\pm 0.09\left(\mathrm{stat}\right)\pm 0.06\left(\mathrm{syst}\right)\pm 0.05\left({\mathcal{B } }_{\mathrm{ref } }\right)\right]\times {10}^{-4},\end{array } } $$

    where the third uncertainty ($$ \mathcal{B} $$<sub>ref</sub>) is from the uncertainty in the branching fraction of the reference mode D<sup>0</sup> → K<sup>−</sup>π<sup>+</sup>η. The color-suppressed decay D<sup>0</sup> → ϕη is observed for the first time, with very high significance. The results for the CP asymmetries are$$ {\displaystyle \begin{array}{c}{A}_{CP}\left({D}^0\ {\pi}^{+}{\pi}^{-}\eta \right)=\left[0.9\pm 1.2\left(\mathrm{stat}\right)\pm 0.5\left(\mathrm{syst}\right)\right]\%,\\ {}{A}_{CP}\left({D}^0\to {K}^{+}{K}^{-}\eta \right)=\left[-1.4\pm 3.3\left(\mathrm{stat}\right)\pm 1.1\left(\mathrm{syst}\right)\right]\%,\\ {} ACP\ \left({D}^0\to \phi \eta \right)=\left[-1.9\pm 4.4\left(\mathrm{stat}\right)\pm 0.6\left(\mathrm{syst}\right)\right]\%.\end{array } } $$

    The results for D<sup>0</sup> → π<sup>+</sup>π<sup>−</sup>η are a significant improvement over previous results. The branching fraction and A<sub>CP</sub> results for D<sup>0</sup> → K<sup>+</sup>K<sup>−</sup>η, and the ACP result for D<sup>0</sup> → ϕη, are the first such measurements. No evidence for CP violation is found in any of these decays.

    DOI: 10.1007/jhep09(2021)075

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    その他リンク: https://link.springer.com/article/10.1007/JHEP09(2021)075/fulltext.html

  • River Flow Path Control With Reinforcement Learning

    Dongqi Liu, Yutaka Naito, Chen Zhang, Shogo Muramatsu, Hiroyasu Yasuda, Kiyoshi Hayasaka, Yu Otake

    2021 IEEE International Conference on Autonomous Systems (ICAS)   2021年8月

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    掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    DOI: 10.1109/icas49788.2021.9551113

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  • Search for the decay Bs0 →η′η

    N. K. Nisar, V. Savinov, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M. C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. DoleŽal, T. V. Dong, S. Dubey, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, S. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar

    Physical Review D   104 ( 3 )   2021年8月

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    掲載種別:研究論文(学術雑誌)  

    We report the results of the first search for the decay Bs0→η′η using 121.4 fb-1 of data collected at the I (5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e-collider. We observe no significant signal and set a 90% confidence-level upper limit of 6.5×10-5 on the branching fraction of this decay.

    DOI: 10.1103/PhysRevD.104.L031101

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  • Measurements of partial branching fractions of inclusive B →xuℓ+νℓ decays with hadronic tagging

    L. Cao, W. Sutcliffe, R. Van Tonder, F. U. Bernlochner, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, S. Dubey, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, Y. Guan, C. Hadjivasiliou, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, H. B. Jeon, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, B. H. Kim, C. H. Kim, D. Y. Kim, H. J. Kim, K. H. Kim, S. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, D. Kotchetkov

    Physical Review D   104 ( 1 )   2021年7月

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    掲載種別:研究論文(学術雑誌)  

    We present measurements of partial branching fractions of inclusive semileptonic B→Xuℓ+νℓ decays using the full Belle dataset of 711 fb-1 of integrated luminosity at the ϒ(4S) resonance and for ℓ=e, μ. Inclusive semileptonic B→Xuℓ+νℓ decays are Cabibbo-Kobayashi-Maskawa (CKM) suppressed and measurements are complicated by the large background from CKM favored B→Xcℓ+νℓ transitions, which have a similar signature. Using machine learning techniques, we reduce this and other backgrounds effectively, while retaining access to a large fraction of the B→Xuℓ+νℓ phase space and high signal efficiency. We measure partial branching fractions in three phase-space regions covering about 31% to 86% of the accessible B→Xuℓ+νℓ phase space. The most inclusive measurement corresponds to the phase space with lepton energies of EℓB>1 GeV, and we obtain ΔB(B→Xuℓ+νℓ)=(1.59±0.07±0.16)×10-3 from a two-dimensional fit of the hadronic mass spectrum and the four-momentum-transfer squared distribution, with the uncertainties denoting the statistical and systematic error. We find |Vub|=(4.10±0.09±0.22±0.15)×10-3 from an average of four calculations for the partial decay rate with the third uncertainty denoting the average theory error. This value is higher but compatible with the determination from exclusive semileptonic decays within 1.3 standard deviations. In addition, we report charmless inclusive partial branching fractions separately for B+ and B0 mesons as well as for electron and muon final states. No isospin breaking or lepton flavor universality violating effects are observed.

    DOI: 10.1103/PhysRevD.104.012008

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  • Search for Bs0 →η′Xs s ¯ at Belle using a semi-inclusive method SEARCH for Bs0 →η′Xs s ¯ ... DUBEY et al.

    S. Dubey, T. E. Browder, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, M. Bessner, B. Bhuyan, S. Bilokin, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, M. Campajola, D. Červenkov, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, R. Dhamija, F. Di Capua, Z. DoleŽal, D. Dossett, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, D. Greenwald, Y. Guan, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, E. J. Jang, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, T. Kawasaki, H. Kichimi, C. H. Kim, D. Y. Kim, S. H. Kim, Y. K. Kim, T. D. Kimmel, K. Kinoshita, S. Korpar, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, K. Kumara, Y. J. Kwon, K. Lalwani, J. S. Lange, S. C. Lee, C. H. Li, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, C. Macqueen, M. Masuda, T. Matsuda, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, S. Mohanty

    Physical Review D   104 ( 1 )   2021年7月

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    掲載種別:研究論文(学術雑誌)  

    We report the first search for the penguin-dominated process Bs0→η′Xss¯ using a semi-inclusive method. A 121.4 fb-1 integrated luminosity ϒ(5S) data set collected by the Belle experiment, at the KEKB asymmetric-energy e+e- collider, is used. We observe no statistically significant signal and, including all uncertainties, we set a 90% confidence level upper limit on the partial branching fraction at 1.4×10-3 for M(Xss¯)≤2.4 GeV/c2.

    DOI: 10.1103/PhysRevD.104.012007

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  • Measurement of branching fractions and CP asymmetries for Ds+→K+(η,π0) and Ds+→π+(η,π0) decays at Belle

    Y. Guan, A. J. Schwartz, K. Kinoshita, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, P. Behera, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M.-C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, S. H. Kim, Y.-K. Kim, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, M. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, P. Lewis, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, G. B. Mohanty, M. Mrvar, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. V. Purohit, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, B. Shwartz, F. Simon, J. B. Singh, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, Z. S. Stottler, M. Sumihama, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, T. Uglov, Y. Unno, S. Uno, P. Urquijo, R. Van Tonder, G. Varner, A. Vossen, E. Waheed, C. H. Wang, M.-Z. Wang, P. Wang, X. L. Wang, S. Watanuki, O. Werbycka, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   103 ( 11 )   2021年6月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.103.112005

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.103.112005/fulltext

  • Sparse-Coded Dynamic Mode Decomposition on Graph for Prediction of River Water Level Distribution

    Yusuke ARAI, Shogo MURAMATSU, Hiroyasu YASUDA, Kiyoshi HAYASAKA, Yu OTAKE

    ICASSP 2021 - 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)   2021年6月

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    掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IEEE  

    DOI: 10.1109/icassp39728.2021.9414533

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  • Measurement of the branching fraction of the decay B+ →π+π-ℓ+νℓ in fully reconstructed events at Belle

    C. Beleño, A. Frey, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, P. Behera, J. Bennett, F. Bernlochner, V. Bhardwaj, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, P. Chang, A. Chen, K. Chilikin, K. Cho, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, Y. Guan, O. Hartbrich, K. Hayasaka, H. Hayashii, W. S. Hou, K. Inami, A. Ishikawa, M. Iwasaki, W. W. Jacobs, H. B. Jeon, Y. Jin, K. K. Joo, C. Kiesling, B. H. Kim, D. Y. Kim, K. H. Kim, S. H. Kim, Y. K. Kim, T. D. Kimmel, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, A. Kuzmin, Y. J. Kwon, K. Lalwani, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, T. Luo, J. Macnaughton, C. Macqueen, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, G. B. Mohanty, T. J. Moon, T. Mori, M. Mrvar, M. Nakao, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov

    Physical Review D   103 ( 11 )   2021年6月

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    掲載種別:研究論文(学術雑誌)  

    We present an analysis of the exclusive B+→π+π-ℓ+νℓ decay, where ℓ represents an electron or a muon, with the assumption of charge-conjugation symmetry and lepton universality. The study exploits the full ϒ(4S) data sample collected by the Belle detector, corresponding to 711 fb-1 of integrated luminosity. Events are selected by fully reconstructing one B meson in hadronic decay modes, subsequently determining the properties of the other B meson. We extract the signal yields using a binned maximum-likelihood fit to the missing-mass squared distribution in bins of the invariant mass of the two pions or the momentum transfer squared. We measure a total branching fraction of B(B+→π+π-ℓ+νℓ)=[22.7-1.6+1.9(stat)±3.5(syst)]×10-5, where the uncertainties are statistical and systematic, respectively. This result is the first reported measurement of this decay.

    DOI: 10.1103/PhysRevD.103.112001

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  • First determination of the spin and parity of the charmed-strange baryon Ξc (2970)+

    T. J. Moon, K. Tanida, Y. Kato, S. K. Kim, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, C. Beleño, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M. C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, F. Di Capua, Z. DoleŽal, T. V. Dong, D. Dossett, S. Dubey, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, B. H. Kim, D. Y. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, Y. K. Kim, T. D. Kimmel, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, I. S. Lee, J. Y. Lee

    Physical Review D   103 ( 11 )   2021年6月

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    掲載種別:研究論文(学術雑誌)  

    We report results from a study of the spin and parity of Ξc(2970)+ using a 980 fb-1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. The decay angle distributions in the chain Ξc(2970)+→Ξc(2645)0π+→Ξc+π-π+ are analyzed to determine the spin of this charmed-strange baryon. The angular distributions strongly favor the Ξc(2970)+ spin J=1/2 over 3/2 or 5/2, under an assumption that the lowest partial wave dominates in the decay. We also measure the ratio of Ξc(2970)+ decay branching fractions R=B[Ξc(2970)+→Ξc(2645)0π+]/B[Ξc(2970)+→Ξc′0π+]=1.67±0.29(stat)-0.09+0.15(syst)±0.25(IS), where the last uncertainty is due to possible isospin-symmetry-breaking effects. This R value favors the spin-parity JP=1/2+ with the spin of the light-quark degrees of freedom sl=0. This is the first determination of the spin and parity of a charmed-strange baryon.

    DOI: 10.1103/PhysRevD.103.L111101

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  • Measurement of the resonant and nonresonant branching ratios in Ξc0 → Ξ0K+K-

    J. T. McNeil, J. Yelton, J. Bennett, I. Adachi, K. Adamczyk, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, M. Bessner, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. DoleŽal, T. V. Dong, S. Eidelman, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, Y. Guan, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, K. Huang, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, H. Kichimi, B. H. Kim, C. H. Kim, D. Y. Kim, S. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, S. Korpar, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, M. Kumar, K. Kumara, Y. J. Kwon, K. Lalwani, S. C. Lee, J. Li, L. K. Li, Y. B. Li, L. Li Gioi

    Physical Review D   103 ( 11 )   2021年6月

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    掲載種別:研究論文(学術雑誌)  

    Using the entire data sample of 980 fb-1 integrated luminosity collected with the Belle detector at the KEKB asymmetric-energy e+e- collider, we present an amplitude analysis measuring the branching fractions of the Cabibbo-allowed, W-exchange resonant decay Ξc0→Ξ0φ(→K+K-) with a polarized φ and the nonresonant decay via a direct process Ξc0→Ξ0K+K-. We present these measurements, relative to the normalization mode Ξ-π+, and find branching ratios B(Ξc0→Ξ0φ(→K+K-))(BΞc0→Ξ-π+)=0.036±0.004(stat.)±0.002(syst.) and B(Ξc0→Ξ0K+K-)B(Ξc0→Ξ-π+)=0.039±0.004(stat.)±0.002(syst.), which suggest that only minor cusping peaks occur in the combinatorial background of ω∗-→Ξ0K- due to these Ξc0 decays.

    DOI: 10.1103/PhysRevD.103.112002

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  • Measurement of the energy dependence of the e <sup>+</sup> e <sup>−</sup> → BB¯ , BB¯ <sup>∗</sup> and B<sup>∗</sup>B¯ <sup>∗</sup> exclusive cross sections

    R. Mizuk, A. Bondar, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M. C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, J. Dingfelder, Z. Doležal, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, P. Goldenzweig, B. Golob, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, K. Huang, T. Iijima, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, S. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, K. Kumara, A. Kuzmin, Y. J. Kwon, S. C. Lee, P. Lewis, J. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, M. Masuda, T. Matsuda

    Journal of High Energy Physics   2021 ( 6 )   2021年6月

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    掲載種別:研究論文(学術雑誌)  

    We report the first measurement of the exclusive cross sections e+e− → BB¯ , e+e− → BB¯ ∗, and e+e− → B∗B¯ ∗ in the energy range from 10.63 GeV to 11.02 GeV. The B mesons are fully reconstructed in a large number of hadronic final states and the three channels are identified using a beam-constrained-mass variable. The shapes of the exclusive cross sections show oscillatory behavior with several maxima and minima. The results are obtained using data collected by the Belle experiment at the KEKB asymmetric-energy e+e− collider. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP06(2021)137

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  • Measurements of branching fractions and asymmetry parameters of Ξc0→Λ<sup>K¯∗0</sup> , Ξc0→<sup>Σ0</sup><sup>K¯∗0</sup> , and Ξc0→<sup>Σ+</sup><sup>K∗−</sup> decays

    S. Jia, S. S. Tang, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, M. Bessner, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M. C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, G. De Nardo, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, K. Flood, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, O. Hartbrich, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, Y. Jin, K. K. Joo, G. Karyan, Y. Kato, H. Kichimi, C. H. Kim, D. Y. Kim, K. H. Kim, S. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, K. Kumara, A. Kuzmin, Y. J. Kwon, K. Lalwani, J. S. Lange, S. C. Lee, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen

    Journal of High Energy Physics   2021 ( 6 )   2021年6月

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    掲載種別:研究論文(学術雑誌)  

    Using a data sample of 980 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, we study the processes of Ξc0→ΛK¯∗0, Ξc0→Σ0K¯∗0, and Ξc0→Σ+K∗− for the first time. The relative branching ratios to the normalization mode of Ξc0→Ξ−π+ are measured to beB(Ξc0→ΛK¯∗0)/B(Ξc0→Ξ−π+)=0.18±0.02(stat.)±0.01(syst.),B(Ξc0→Σ0K¯∗0)/B(Ξc0→Ξ−π+)=0.69±0.03(stat.)±0.03(syst.),B(Ξc0→Σ+K∗−)/B(Ξc0→Ξ−π+)=0.34±0.06(stat.)±0.02(syst.), where the uncertainties are statistical and systematic, respectively. We obtainB(Ξc0→ΛK¯∗0)=(3.3±0.3(stat.)±0.2(syst.)±1.0(ref.))×10−3,B(Ξc0→Σ0K¯∗0)=(12.4±0.5(stat.)±0.5(syst.)±3.6(ref.))×10−3,B(Ξc0→Σ+K∗0)=(6.1±1.0(stat.)±0.4(syst.)±1.8(ref.))×10−3, where the uncertainties are statistical, systematic, and from B(Ξc0→Ξ−π+), respectively. The asymmetry parameters α(Ξc0→ΛK¯∗0) and α(Ξc0→Σ+K∗−) are 0.15 ± 0.22(stat.) ± 0.04(syst.) and −0.52 ± 0.30(stat.) ± 0.02(syst.), respectively, where the uncertainties are statistical followed by systematic. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP06(2021)160

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  • Measurements of the branching fractions of Λc+→pη and Λc+→pπ0 decays at Belle

    S. X. Li, C. P. Shen, I. Adachi, J. K. Ahn, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, J. Bennett, F. Bernlochner, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M.-C. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, K. Gudkova, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, W.-S. Hou, C.-L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E.-J. Jang, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, B. H. Kim, C. H. Kim, D. Y. Kim, K.-H. Kim, S. H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, R. Mizuk, S. Mohanty, T. Mori, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, H. Ono, Y. Onuki, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, V. Shebalin, J.-G. Shiu, B. Shwartz, E. Solovieva, S. Stanič, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, K. Uno, S. Uno, P. Urquijo, R. Van Tonder, G. Varner, A. Vossen, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, S. Watanuki, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    Physical Review D   103 ( 7 )   2021年4月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.103.072004

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  • Test of Lepton-Flavor Universality in B -> K*l(+)l(-) Decays at Belle

    S. Wehle, Adachi, I, K. Adamczyk, H. Aihara, D. M. Asner, H. Atmacan, Aulchenko, V, T. Aushev, R. Ayad, Babu, V, P. Behera, M. Berger, Bhardwaj, V, J. Biswal, A. Bozek, T. E. Browder, M. Campajola, L. Cao, M-C Chang, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, F. Di Capua, S. Dubey, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, Gaur, V, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, D. Greenwald, Y. Guan, J. Haba, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, T. Higuchi, W-S Hou, C-L Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Joffe, J. Kahn, A. B. Kaliyar, G. Karyan, H. Kichimi, D. Y. Kim, K. T. Kim, S. H. Kim, Y-K Kim, K. Kinoshita, Komarov, I, S. Korpar, D. Kotchetkov, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, K. Kumara, A. Kuzmin, Y-J Kwon, J. S. Lange, J. Y. Lee, S. C. Lee, Y. B. Li, J. Libby, Z. Liptak, D. Liventsev, T. Luo, J. MacNaughton, M. Masuda, T. Matsuda, J. T. McNeil, M. Merola, F. Metzner, H. Miyata, R. Mizuk, G. B. Mohanty, T. J. Moon, R. Mussa, M. Nakao, A. Natochii, M. Nayak, C. Niebuhr, M. Niiyama, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, S-H Park, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, Popov, V, E. Prencipe, M. T. Prim, P. K. Resmi, M. Ritter, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, Savinov, V, O. Schneider, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, J-G Shiu, B. Shwartz, E. Solovieva, J. F. Strube, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, S. E. Vahsen, R. Van Tonder, G. Varner, K. E. Varvell, V. Vorobyev, C. H. Wang, M-Z Wang, P. Wang, X. L. Wang, E. Won, X. Xu, S. B. Yang, H. Ye, J. H. Yin, C. Z. Yuan, Z. P. Zhang, Zhilich, V, Zhukova, V, Zhulanov, V

    PHYSICAL REVIEW LETTERS   126 ( 16 )   2021年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of R-K(*), the branching fraction ratio B(B -> K* mu(+)mu(-))/B(B -> K* e(+) e(-)), for both charged and neutral B mesons. The ratio for the charged case RK*+ is the first measurement ever performed. In addition, we report absolute branching fractions for the individual modes in bins of the squared dilepton invariant mass q(2). The analysis is based on a data sample of 711 fb(-1), containing 772 x 10(6) B (B) over bar events, recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The obtained results are consistent with standard model expectations.

    DOI: 10.1103/PhysRevLett.126.161801

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  • Erratum: Measurements of the branching fractions ofΛc+→pηandΛc+→pπ0decays at Belle (Physical Review D (2019) 100 (052007) DOI: 10.1103/PhysRevD.100.052007)

    E. Waheed, P. Urquijo, D. Ferlewicz, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, I. Badhrees, V. Bansal, P. Behera, C. Belenõ, F. Bernlochner, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Di Carlo, Z. DoleŽal, T. V. Dong, D. Dossett, S. Eidelman, D. Epifanov, J. E. Fast, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, J. Kahn, A. B. Kaliyar, G. Karyan, T. Kawasaki, C. H. Kim, D. Y. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. J. Kwon, J. S. Lange, J. Y. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby

    Physical Review D   103 ( 7 )   2021年4月

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    掲載種別:研究論文(学術雑誌)  

    There was an error in the calculation of the value of NB0 in the original transcript. The value of f00 was erroneously set to 0.500 in the code (the value used in Monte Carlo studies), not the world average value of 0.486 as specified in the transcript. The effect of this change is to increase the quoted values of F(1)|Vcb|?EW by 1.4% and the branching fraction by 2.9%. The associated relative systematic uncertainties remain unchanged from the original transcript. Below, we report on the resulting changes in the measurement. The fit results from the Caprini-Lellouch-Neubert (CLN) and Boyd, Grinstein and Lebed (BGL) parameterizations are given in Tables I and II, respectively. (Table Presented).

    DOI: 10.1103/PhysRevD.103.079901

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  • Search for the dark photon in B-0 -> A ' A ', A ' -> e(+)e(-), mu(+)mu(-), and pi(+)pi(-) decays at Belle

    Y. Li, Y. B. Li, C. P. Shen, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, P. Behera, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, L. Cao, D. Cervenkov, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, S. Di Carlo, Z. Dolezal, T. V. Dong, S. Eidelman, J. E. Fast, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, B. Grube, T. Hara, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, H. Kichimi, C. H. Kim, D. Y. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. -J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, P. Lewis, C. H. Li, L. K. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, H. Miyata, R. Mizuk, R. Mussa, M. Nakao, K. J. Nath, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, S. -H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Roehrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, J. -G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, R. Van Tonder, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, X. L. Wang, M. Watanabe, E. Won, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    JOURNAL OF HIGH ENERGY PHYSICS   ( 4 )   2021年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER  

    We present a search for the dark photon A in the B-0 -> A ' A ' decays, where A ' subsequently decays to e(+)e(-), mu(+)mu(-), and pi(+)pi(-). The search is performed by analyzing 772 x 10(6) B (B) over bar events collected by the Belle detector at the KEKB e(+)e(-) energy-asymmetric collider at the Upsilon(4S) resonance. No signal is found in the dark photon mass range 0.01 GeV/c(2) <= m(A ') <= 2.62 GeV/c(2), and we set upper limits of the branching fraction of B-0 -> A ' A ' at the 90% confidence level. The products of branching fractions, B(B-0 -> A ' A ) x B(A '-> e(+)e(-))(2) and B(B-0 -> A ' A ') x B(A '-> mu(+)mu(-))(2), have limits of the order of 10(-8) depending on the A ' mass. Furthermore, considering A ' decay rate to each pair of charged particles, the upper limits of B(B-0 -> A ' A '), we obtain the Higgs portal coupling for each assumed dark photon and dark Higgs mass. The Higgs portal couplings are of the order of 10(-2)-10(-1) at m(h ') similar or equal to m(B0) +/- 40 MeV/c(2) and 10(-1)-1 at mh ' similar or equal to m(B0) +/- 3 GeV/c(2).

    DOI: 10.1007/JHEP04(2021)191

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  • Measurement of branching fraction and search for CP violation in B→ϕϕK

    S. Mohanty, A. B. Kaliyar, V. Gaur, G. B. Mohanty, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, T. Aziz, V. Babu, S. Bahinipati, P. Behera, M. Bessner, V. Bhardwaj, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S.-J. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, S. Eidelman, T. Ferber, B. G. Fulsom, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, B. H. Kim, C. H. Kim, D. Y. Kim, S. H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Konno, S. Korpar, D. Kotchetkov, P. Križan, P. Krokovny, R. Kulasiri, M. Kumar, R. Kumar, K. Kumara, Y.-J. Kwon, K. Lalwani, S. C. Lee, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, Z. Liptak, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, R. Mizuk, T. J. Moon, R. Mussa, M. Nakao, A. Natochii, L. Nayak, M. Nayak, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, Y. Onuki, P. Oskin, G. Pakhlova, S. Pardi, C. W. Park, H. Park, S.-H. Park, S. Patra, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, J.-G. Shiu, B. Shwartz, F. Simon, E. Solovieva, M. Starič, Z. S. Stottler, J. F. Strube, T. Sumiyoshi, M. Takizawa, K. Tanida, Y. Tao, F. Tenchini, M. Uchida, Y. Unno, S. Uno, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, X. L. Wang, S. Watanuki, J. Wiechczynski, E. Won, X. Xu, B. D. Yabsley, W. Yan, H. Ye, J. H. Yin, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   103 ( 5 )   2021年3月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.103.052013

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  • Evidence for X (3872) →j/ψ π+ π-Produced in Single-Tag Two-Photon Interactions

    Y. Teramoto, S. Uehara, M. Masuda, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, P. Behera, C. Belenõ, J. Bennett, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, Z. DoleŽal, T. V. Dong, S. Eidelman, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, D. Greenwald, C. Hadjivasiliou, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, J. Kahn, A. B. Kaliyar, K. H. Kang, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, B. H. Kim, D. Y. Kim, S. H. Kim, Y. K. Kim, T. D. Kimmel, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, K. Kumara, A. Kuzmin, Y. J. Kwon, K. Lalwani

    Physical Review Letters   126 ( 12 )   2021年3月

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    掲載種別:研究論文(学術雑誌)  

    We report the first evidence for X(3872) production in two-photon interactions by tagging either the electron or the positron in the final state, exploring the highly virtual photon region. The search is performed in e+e-→e+e-J/ψ π+ π-, using 825 fb-1 of data collected by the Belle detector operated at the KEKB e+e-collider. We observe three X(3872) candidates, where the expected background is 0.11±0.10 events, with a significance of 3.2σ. We obtain an estimated value for γB(X(3872)→J/ψ π+ π-) assuming the Q2 dependence predicted by a cc meson model, where-Q2 is the invariant mass squared of the virtual photon. No X(3915)→J/ψ π+ π-candidates are found.

    DOI: 10.1103/PhysRevLett.126.122001

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  • Measurement of branching fractions of Λc+ →η Λπ+, η ς0π+, Λ (1670)π+, and η ς (1385)+

    J. Y. Lee, K. Tanida, Y. Kato, S. K. Kim, S. B. Yang, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, C. Beleño, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, C. L. Hsu, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, K. H. Kang, G. Karyan, H. Kichimi, C. Kiesling, B. H. Kim, D. Y. Kim, K. H. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, K. Kumara, A. Kuzmin, Y. J. Kwon, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby

    Physical Review D   103 ( 5 )   2021年3月

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    掲載種別:研究論文(学術雑誌)  

    We report branching fraction measurements of four decay modes of the Λc+ baryon, each of which includes an η meson and a Λ baryon in the final state, and all of which are measured relative to the Λc+→pK-π+ decay mode. The results are based on a 980 fb-1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. Two decays, Λc+→ης0π+ and Λ(1670)π+, are observed for the first time, while the measurements of the other decay modes, Λc+→ηΛπ+ and ης(1385)+, are more precise than those made previously. We obtain relative branching fractions of B(Λc+→ηΛπ+)/B(Λc+→pK-π+)=0.293±0.003±0.014, B(Λc+→ης0π+)/B(Λc+→pK-π+)=0.120±0.006±0.010, B(Λc+→Λ(1670)π+)×B(Λ(1670)→ηΛ)/B(Λc+→pK-π+)=(5.54±0.29±0.73)×10-2, and B(Λc+→ης(1385)+)/B(Λc+→pK-π+)=0.192±0.006±0.016. The mass and width of the Λ(1670) are also precisely determined to be 1674.3±0.8±4.9 MeV/c2 and 36.1±2.4±4.8 MeV, respectively, where the uncertainties are statistical and systematic, respectively.

    DOI: 10.1103/PhysRevD.103.052005

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  • Test of lepton flavor universality and search for lepton flavor violation in B -> Kll decays

    Y. Li, Y. B. Li, C. P. Shen, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, P. Behera, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, L. Cao, D. Cervenkov, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, S. Di Carlo, Z. Dolezal, T. V. Dong, S. Eidelman, J. E. Fast, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, B. Grube, T. Hara, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, H. Kichimi, C. H. Kim, D. Y. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. -J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, P. Lewis, C. H. Li, L. K. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, H. Miyata, R. Mizuk, R. Mussa, M. Nakao, K. J. Nath, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, S. -H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Roehrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, J. -G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, R. Van Tonder, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, X. L. Wang, M. Watanabe, E. Won, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    JOURNAL OF HIGH ENERGY PHYSICS   ( 3 )   2021年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER  

    We present measurements of the branching fractions for the decays B -> K mu(+)mu(-) and B -> Ke(+)e(-), and their ratio (R-K), using a data sample of 711 fb(-1) that contains 772 x 10(6) B (B) over bar events. The data were collected at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The ratio RK is measured in five bins of dilepton invariant-mass-squared (q(2)): q(2) is an element of (0.1, 4.0), (4.00, 8.12), (1.0, 6.0), (10.2, 12.8) and (> 14.18) GeV2/c(4), along with the whole q(2) region. The R-K value for q(2) is an element of (1.0, 6.0) GeV2/c(4) is 1.03(-0.24)(+0.28) +/- 0.01. The first and second uncertainties listed are statistical and systematic, respectively. All results for R-K are consistent with Standard Model predictions. We also measure CP-averaged isospin asymmetries in the same q(2) bins. The results are consistent with a null asymmetry, with the largest difference of 2.6 standard deviations occurring for the q(2) is an element of (1.0, 6.0) GeV2/c(4) bin in the mode with muon final states. The measured differential branching fractions, dB/dq(2), are consistent with theoretical predictions for charged B decays, while the corresponding values are below the expectations for neutral B decays. We have also searched for lepton-flavor-violating B -> K mu(+/-)e(-/+) decays and set 90% confidence-level upper limits on the branching fraction in the range of 10(-8) for B+ -> K+ mu(+/-)e(-/+), and B-0 -> K-0 mu(+/-) e(-/+) modes.

    DOI: 10.1007/JHEP03(2021)105

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  • Measurement of time-dependent CP violation parameters in B0→KS0KS0KS0 decays at Belle 査読

    K. H. Kang, H. Park, T. Higuchi, K. Miyabayashi, K. Sumisawa, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, A. M. Bakich, P. Behera, C. Beleño, J. Bennett, V. Bhardwaj, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M.-C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S.-K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, Z. Doležal, T. V. Dong, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, D. Greenwald, Y. Guan, O. Hartbrich, K. Hayasaka, H. Hayashii, M. Hernandez Villanueva, W.-S. Hou, C.-L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E.-J. Jang, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, K.-H. Kim, S. H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, R. Kulasiri, R. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, J. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, J. MacNaughton, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, H. Miyata, R. Mizuk, G. B. Mohanty, T. J. Moon, T. Mori, T. Morii, M. Mrvar, R. Mussa, M. Nakao, H. Nakazawa, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, K. Ogawa, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. V. Purohit, M. Ritter, M. Röhrken, A. Rostomyan, N. Rout, M. Rozanska, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, J.-G. Shiu, E. Solovieva, S. Stanič, M. Starič, Z. S. Stottler, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, G. Varner, A. Vinokurova, V. Vorobyev, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, X. L. Wang, S. Watanuki, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    Physical Review D   103 ( 3 )   2021年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    We measure the time-dependent CP violation parameters in B0→KS0KS0KS0 decays using 772×106BB¯ pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The obtained mixing-induced and direct CP asymmetries are -0.71±0.23 (stat)±0.05 (syst) and 0.12±0.16 (stat)±0.05 (syst), respectively. These values are consistent with the Standard Model predictions. The significance of CP violation differs from zero by 2.5 standard deviations.

    DOI: 10.1103/physrevd.103.032003

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.103.032003/fulltext

  • Search for lepton-number- and baryon-number-violating tau decays at Belle

    D. Sahoo, G. B. Mohanty, K. Trabelsi, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, V. Babu, S. Bahinipati, P. Behera, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M.-C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, F. Di Capua, J. Dingfelder, Z. Doležal, T. V. Dong, S. Dubey, S. Eidelman, D. Epifanov, T. Ferber, D. Ferlewicz, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, Y. Guan, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, W.-S. Hou, C.-L. Hsu, K. Huang, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, S. H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, T. Konno, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, A. Kuzmin, Y.-J. Kwon, K. Lalwani, I. S. Lee, S. C. Lee, C. H. Li, J. Li, L. K. Li, Y. B. Li, J. Libby, K. Lieret, D. Liventsev, T. Luo, J. MacNaughton, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, R. Mizuk, S. Mohanty, T. J. Moon, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, C. W. Park, H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Ritter, M. Röhrken, A. Rostomyan, N. Rout, M. Rozanska, G. Russo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, C. P. Shen, J.-G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, Z. S. Stottler, J. F. Strube, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, V. Vorobyev, E. Waheed, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, M. Watanabe, S. Watanuki, S. Wehle, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, Y. Yusa, V. Zhilich, V. Zhukova, V. Zhulanov

    Physical Review D   102 ( 11 )   2020年12月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.102.111101

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  • Search for a doubly charged DDK bound state in ϒ (1S, 2S) inclusive decays and via direct production in e+e- collisions at s =10.520, 10.580, and 10.867 GeV SEARCH for A DOUBLY CHARGED DDK BOUND STATE in ... LI Y. et al.

    Y. Li, S. Jia, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, M. C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, F. Di Capua, J. Dingfelder, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, Y. Guan, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, C. L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, D. Y. Kim, K. H. Kim, S. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodyš, T. Konno, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, M. Kumar, R. Kumar, K. Kumara, Y. J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, C. H. Li

    Physical Review D   102 ( 11 )   2020年12月

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    掲載種別:研究論文(学術雑誌)  

    We report the results of a first search for a doubly charged DDK bound state, denoted the R++, in ϒ(1S) and ϒ(2S) inclusive decays and via direct production in e+e- collisions at s=10.520, 10.580, and 10.867 GeV. The search uses data accumulated with the Belle detector at the KEKB asymmetric-energy e+e- collider. No significant signals are observed in the D+Ds∗+ invariant-mass spectra of all studied modes. The 90% credibility level upper limits on their product branching fractions in ϒ(1S) and ϒ(2S) inclusive decays (B(ϒ(1S, 2S)→R+++anything)×B(R++→D+Ds∗+)), the product values of Born cross section and branching fraction in e+e- collisions (σ(e+e-→R+++anything)×B(R++→D+Ds∗+)) at s=10.520, 10.580, and 10.867 GeV under different assumptions of R++ masses varying from 4.13 to 4.17 GeV/c2 and widths varying from 0 to 5 MeV are obtained.

    DOI: 10.1103/PhysRevD.102.112001

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  • Search for transitions from Upsilon(4S) and Upsilon(5S) to eta(b) (1S) and eta(b) (2S) with emission of an omega meson

    J. Yelton, Adachi, I, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, Babu, V, S. Bahinipati, P. Behera, C. Beleno, J. Bennett, Bhardwaj, V, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, D. Cervenkov, M-C Chang, P. Chang, Chekelian, V, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S-J Cho, S-K Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, Z. Dolezal, T. Dong, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, Gaur, V, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, W-S Hou, C-L Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, B. H. Kim, D. Y. Kim, S. H. Kim, Y-K Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, R. Kroeger, P. Krokovny, R. Kulasiri, R. Kumar, K. Kumara, A. Kuzmin, Y-J Kwon, K. Lalwani, J. S. Lange, S. C. Lee, P. Lewis, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, Z. Liptak, D. Liventsev, T. Luo, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, J. T. McNeil, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, T. J. Moon, T. Mori, M. Mrvar, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, A. Natochii, M. Nayak, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S-H Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, Popov, V, E. Prencipe, M. T. Prim, M. Ritter, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Savinov, V, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, Shebalin, V, C. P. Shen, J-G Shiu, B. Shwartz, J. B. Singh, A. Sokolov, E. Solovieva, M. Staric, Z. S. Stottler, J. F. Strube, M. Sumihama, K. Sumisawa, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, V. Vorobyev, E. Waheed, C. H. Wang, E. Wang, M-Z Wang, P. Wang, X. L. Wang, M. Watanabe, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, Z. P. Zhang, Zhilich, V, Zhukova, V, Zhulanov, V

    PHYSICAL REVIEW D   102 ( 9 )   2020年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using data collected in the Belle experiment at the KEKB asymmetric-energy e(+) e(-) collider we search for transitions Upsilon(4S) -> eta(b)(1S)omega, Upsilon(5S) -> eta(b)(1S)omega and Upsilon(5S) -> eta(b)(2S)omega. No significant signals are observed and we set 90% confidence level upper limits on the corresponding visible cross sections: 0.2 ph, 0.4 pb and 1.9 pb, respectively.

    DOI: 10.1103/PhysRevD.102.092011

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  • Measurement of the charm-mixing parameter yCP in D0→KS0ω decays at Belle

    M. Nayak, D. Cinabro, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, C. Beleño, J. Bennett, V. Bhardwaj, B. Bhuyan, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-K. Choi, Y. Choi, S. Choudhury, S. Cunliffe, N. Dash, G. De Nardo, F. Di Capua, S. Di Carlo, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, T. Hara, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, B. H. Kim, C. H. Kim, D. Y. Kim, S. H. Kim, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kumar, Y.-J. Kwon, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, R. Mizuk, G. B. Mohanty, T. J. Moon, R. Mussa, M. Nakao, Z. Natkaniec, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, K. Ogawa, S. Ogawa, H. Ono, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S.-H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, P. K. Resmi, M. Ritter, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, V. Shebalin, J.-G. Shiu, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, Z. S. Stottler, J. F. Strube, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, R. Van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, A. Vossen, C. H. Wang, M.-Z. Wang, P. Wang, X. L. Wang, M. Watanabe, E. Won, X. Xu, S. B. Yang, H. Ye, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    Physical Review D   102 ( 7 )   2020年10月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.102.071102

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  • Study of electromagnetic decays of orbitally excited Xi(c) baryons

    J. Yelton, Adachi, I, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, Babu, V, S. Bahinipati, P. Behera, C. Beleno, J. Bennett, Bhardwaj, V, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, D. Cervenkov, M-C Chang, P. Chang, Chekelian, V, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S-J Cho, S-K Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, Z. Dolezal, T. Dong, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, Gaur, V, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, C. Hadjivasiliou, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, M. Hernandez Villanueva, W-S Hou, C-L Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, C. W. Joo, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, B. H. Kim, D. Y. Kim, S. H. Kim, Y-K Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, R. Kroeger, P. Krokovny, R. Kulasiri, R. Kumar, K. Kumara, A. Kuzmin, Y-J Kwon, K. Lalwani, J. S. Lange, S. C. Lee, P. Lewis, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, Z. Liptak, D. Liventsev, T. Luo, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, J. T. McNeil, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, T. J. Moon, T. Mori, M. Mrvar, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, A. Natochii, M. Nayak, N. K. Nisar, S. Nishida, K. Ogawa, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S-H Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, Popov, V, E. Prencipe, M. T. Prim, M. Ritter, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Savinov, V, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, Shebalin, V, C. P. Shen, J-G Shiu, B. Shwartz, J. B. Singh, A. Sokolov, E. Solovieva, M. Staric, Z. S. Stottler, J. F. Strube, M. Sumihama, K. Sumisawa, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, V. Vorobyev, E. Waheed, C. H. Wang, E. Wang, M-Z Wang, P. Wang, X. L. Wang, M. Watanabe, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. H. Yin, Z. P. Zhang, Zhilich, V, Zhukova, V, Zhulanov, V

    PHYSICAL REVIEW D   102 ( 7 )   2020年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using 980 fb(-1) of data collected with the Belle detector operating at the KEKB asymmetric-energy e(+) e(-) collider, we report a study of the electromagnetic decays of excited charmed baryons Xi(c)(2790) and Xi(c)(2815). A clear signal (8.6 standard deviations) is observed for Xi(c)(2815)(0) -> Xi(0)(c)gamma, and we measure: B[Xi(c)(2815)(0) -> Xi(0)(c)gamma]/B[Xi(c)(2815)(0) -> Xi(c)(2645)(+)pi(-) -> Xi(0)(c)pi(+)pi(-)] = - 0.41 +/- 0.05 +/- 0.03. We also present evidence (3.8 standard deviations) for the similar decay of the Xi(c)(2790)(0) and measure:B[Xi(c)(2790)(0) -> Xi(0)(c)gamma]/B[Xi(c)(2790)(0) -> Xi(c)'(+)pi(-) -> Xi(+)(c)gamma pi(-)] = 0.13 +/- 0.03 +/- 0.02. The first quoted uncertainties are statistical and the second systematic. We find no hint of the analogous decays of the Xi(c)(2815)(+) and Xi(c)(2790)(+) baryons and set upper limits at the 90% confidence level of: B[Xi(c)(2815)(0) -> Xi(0)(c)gamma]/B[Xi(c)(2815)(0) -> Xi(c)(2645)(0)pi(+) -> Xi(+)(c)pi(-)pi(+)] < 0.09, and B[Xi(c)(2790)(+) -> Xi(0)(c)gamma]/B[Xi(c)(2815)(+) -> Xi(c)'(0)pi(+) -> Xi(0)(c)gamma pi(+)] < 0.06. Approximate values of the partial widths of the decays are extracted, which can be used to discriminate between models of the underlying quark structure of these excited states.

    DOI: 10.1103/PhysRevD.102.071103

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  • Search for B0 decays to invisible final states ( +γ ) at Belle

    Y. Ku, P. Chang, I. Adachi, K. Adamczyk, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, P. Behera, C. Beleño, J. Bennett, V. Bhardwaj, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, M.-C. Chang, V. Chekelian, K. Chilikin, K. Cho, S.-K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, P. Goldenzweig, O. Grzymkowska, Y. Guan, O. Hartbrich, K. Hayasaka, H. Hayashii, M. Hernandez Villanueva, T. Higuchi, W.-S. Hou, C.-L. Hsu, K. Huang, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, S. Jia, Y. Jin, K. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, T. D. Kimmel, K. Kinoshita, P. Kodyš, S. Korpar, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, Y.-J. Kwon, Y.-T. Lai, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, C. MacQueen, D. Matvienko, M. Merola, R. Mizuk, G. B. Mohanty, T. J. Moon, T. Mori, R. Mussa, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, H. Park, S.-H. Park, S. Patra, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, M. T. Prim, M. Ritter, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, Y. Sakai, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, K. Senyo, M. Shapkin, J.-G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, A. Vinokurova, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, X. L. Wang, M. Watanabe, E. Won, X. Xu, S. B. Yang, H. Ye, C. Z. Yuan, Z. P. Zhang, V. Zhukova

    Physical Review D   102 ( 1 )   2020年7月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.102.012003

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  • Dalitz analysis of D0→K−π+η decays at Belle

    Y. Q. Chen, L. K. Li, W. B. Yan, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, P. Behera, J. Bennett, V. Bhardwaj, T. Bilka, J. Biswal, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M.-C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, F. Di Capua, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, Y. Guan, O. Hartbrich, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E.-J. Jang, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, T. Kawasaki, D. Y. Kim, S. H. Kim, T. D. Kimmel, K. Kinoshita, P. Kodyš, S. Korpar, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, A. Kuzmin, Y.-J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, J. MacNaughton, C. MacQueen, M. Masuda, D. Matvienko, M. Merola, K. Miyabayashi, R. Mizuk, S. Mohanty, M. Mrvar, R. Mussa, M. Nakao, Z. Natkaniec, M. Nayak, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, A. Rabusov, M. Ritter, M. Röhrken, N. Rout, G. Russo, D. Sahoo, Y. Sakai, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, J. Schueler, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, J.-G. Shiu, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, S. Uno, P. Urquijo, G. Varner, V. Vorobyev, E. Waheed, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, M. Watanabe, E. Won, X. Xu, S. B. Yang, H. Ye, J. H. Yin, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    Physical Review D   102 ( 1 )   2020年7月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.102.012002

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  • Evidence for a vector charmoniumlike state in e+e−→Ds+Ds2*(2573)−+c.c.

    S. Jia, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, I. Badhrees, P. Behera, K. Belous, J. Bennett, D. Besson, V. Bhardwaj, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S.-K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, F. Di Capua, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, O. Hartbrich, K. Hayasaka, H. Hayashii, W.-S. Hou, C.-L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. B. Jeon, Y. Jin, K. K. Joo, G. Karyan, T. Kawasaki, C. Kiesling, B. H. Kim, D. Y. Kim, K.-H. Kim, S. H. Kim, Y.-K. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, R. Kulasiri, A. Kuzmin, Y.-J. Kwon, K. Lalwani, J. S. Lange, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, J. MacNaughton, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, R. Mizuk, T. J. Moon, T. Mori, M. Mrvar, M. Nakao, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, A. Rostomyan, N. Rout, G. Russo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, J.-G. Shiu, B. Shwartz, E. Solovieva, S. Stanič, M. Starič, Z. S. Stottler, J. F. Strube, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, R. Van Tonder, G. Varner, A. Vinokurova, C. H. Wang, E. Wang, M.-Z. Wang, P. Wang, X. L. Wang, M. Watanabe, E. Won, X. Xu, W. Yan, S. B. Yang, H. Ye, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    Physical Review D   101 ( 9 )   2020年5月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Physical Society (APS)  

    DOI: 10.1103/physrevd.101.091101

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  • First search for the η<inf>c2</inf>(1D) in B decays at Belle 査読

    K. Chilikin, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, C. Beleño, K. Belous, J. Bennett, V. Bhardwaj, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M. C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, F. Di Capua, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, O. Hartbrich, K. Hayasaka, H. Hayashii, M. Hernandez Villanueva, W. S. Hou, C. L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, G. Karyan, Y. Kato, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, K. H. Kim, S. H. Kim, Y. K. Kim, T. D. Kimmel, K. Kinoshita, P. Kodyš, S. Korpar, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, A. Kuzmin, Y. J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby

    Journal of High Energy Physics   2020 ( 5 )   2020年5月

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    掲載種別:研究論文(学術雑誌)  

    © 2020, The Author(s). The first dedicated search for the ηc2(1D) is carried out using the decays B+→ ηc2(1D)K+, B0 → ηc2(1D)KS0, B0→ ηc2(1D)π−K+, and B+→ ηc2(1D)π+KS0 with ηc2(1D) → hcγ. No significant signal is found. For the ηc2(1D) mass range between 3795 and 3845 MeV/c2, the branching-fraction upper limits are determined to be ℬ(B+→ ηc2(1D)K+) × ℬ(ηc2(1D) → hcγ) < 3.7 × 10−5, ℬ(B0→ ηc2(1D)K0) × ℬ(ηc2(1D) → hcγ) < 3.5 × 10−5, ℬ(B0→ ηc2(1D)π−K+) × ℬ(ηc2(1D) → hcγ) < 1.0 × 10−4, and ℬ(B+→ ηc2(1D)π+KS0) × ℬ(ηc2(1D) → hcγ) < 1.1 × 10−4 at 90% C.L. The analysis is based on the 711 fb−1 data sample collected on the ϒ(4S) resonance by the Belle detector, which operated at the KEKB asymmetric-energy e+e− collider. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP05(2020)034

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  • Measurement of R (D) and R (D∗) with a Semileptonic Tagging Method 査読

    G. Caria, P. Urquijo, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, P. Behera, C. Beleño, J. Bennett, B. Bhuyan, T. Bilka, J. Biswal, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, D. Červenkov, P. Chang, R. Cheaib, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, F. Di Capua, S. Di Carlo, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, D. Greenwald, O. Grzymkowska, Y. Guan, O. Hartbrich, K. Hayasaka, H. Hayashii, T. Higuchi, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. H. Kim, D. Y. Kim, H. J. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, J. F. Krohn, P. Krokovny, T. Kuhr, R. Kumar, Y. J. Kwon, J. S. Lange, I. S. Lee, J. K. Lee, S. C. Lee

    Physical Review Letters   124 ( 16 )   161803   2020年4月

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    掲載種別:研究論文(学術雑誌)  

    © 2020 authors. The experimental results on the ratios of branching fractions R(D)=B(B→Dτ-ντ)/B(B→Dℓ-νℓ) and R(D∗)=B(B→D∗τ-ντ)/B(B→D∗ℓ-νℓ), where ℓ denotes an electron or a muon, show a long-standing discrepancy with the standard model predictions, and might hint at a violation of lepton flavor universality. We report a new simultaneous measurement of R(D) and R(D∗), based on a data sample containing 772×106 BB events recorded at the ϒ(4S) resonance with the Belle detector at the KEKB e+e- collider. In this analysis the tag-side B meson is reconstructed in a semileptonic decay mode and the signal-side τ is reconstructed in a purely leptonic decay. The measured values are R(D)=0.307±0.037±0.016 and R(D∗)=0.283±0.018±0.014, where the first uncertainties are statistical and the second are systematic. These results are in agreement with the standard model predictions within 0.2, 1.1, and 0.8 standard deviations for R(D), R(D∗), and their combination, respectively. This work constitutes the most precise measurements of R(D) and R(D∗) performed to date as well as the first result for R(D) based on a semileptonic tagging method.

    DOI: 10.1103/PhysRevLett.124.161803

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  • Study of B →p p ππ STUDY of B →p p ππ CHU K. et al. 査読

    K. Chu, M. Z. Wang, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, P. Behera, C. Belenõ, J. Bennett, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, M. Campajola, L. Cao, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, F. Di Capua, S. Di Carlo, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Hartbrich, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, G. Karyan, T. Kawasaki, D. Y. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, P. KriŽan, R. Kroeger, P. Krokovny, R. Kulasiri, Y. J. Kwon, Y. T. Lai, I. S. Lee, S. C. Lee, L. K. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, T. Luo, M. Masuda, D. Matvienko, M. Merola, K. Miyabayashi, R. Mizuk, G. B. Mohanty, T. Mori

    Physical Review D   101 ( 5 )   2020年3月

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    掲載種別:研究論文(学術雑誌)  

    © 2020 authors. Using a data sample of 772×106 BB pairs collected on the Ï'(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e-collider, we report the observation of B0→ppπ+π- A nd the first observation of B+→ppπ+π0. We measure a decay branching fraction of (0.83±0.17±0.17)×10-6 in B0→ppπ+π-for Mπ+π-<1.22 GeV/c2 with a significance of 5.5 standard deviations. The contribution from B0→ppK0 is excluded. We measure a decay branching fraction of (4.58±1.17±0.67)×10-6 for B+→ppπ+π0 with Mπ+π0<1.3 GeV/c2 with a significance of 5.4 standard deviations. We study the difference of the Mpp distributions in B0→ppπ+π- A nd B+→ppπ+π0.

    DOI: 10.1103/PhysRevD.101.052012

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  • Measurement of the integrated luminosity of the Phase 2 data of the Belle II experiment 査読

    F. Abudinén, I. Adachi, P. Ahlburg, H. Aihara, N. Akopov, A. Aloisio, F. Ameli, L. Andricek, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, T. Aziz, K. Azmi, V. Babu, S. Baehr, S. Bahinipati, A. M. Bakich, P. Bambade, Sw Banerjee, S. Bansal, V. Bansal, M. Barrett, J. Baudot, A. Beaulieu, J. Becker, P. K. Behera, J. V. Bennett, E. Bernieri, F. U. Bernlochner, M. Bertemes, M. Bessner, S. Bettarini, V. Bhardwaj, F. Bianchi, T. Bilka, S. Bilokin, D. Biswas, G. Bonvicini, A. Bozek, M. Bračko, P. Branchini, N. Braun, T. E. Browder, A. Budano, S. Bussino, M. Campajola, L. Cao, G. Casarosa, C. Cecchi, D. Červenkov, M. C. Chang, P. Chang, R. Cheaib, V. Chekelian, Y. Q. Chen, Y. T. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. Cho, S. K. Choi, S. Choudhury, D. Cinabro, L. Corona, L. M. Cremaldi, S. Cunliffe, T. Czank, F. Dattola, E. De La Cruz-Burelo, G. De Nardo, M. De Nuccio, G. De Pietro, R. De Sangro, M. Destefanis, S. Dey, A. De Yta-Hernandez, F. Di Capua, S. Di Carlo, J. Dingfelder, Z. Doležal, I. Domínguez Jiménez, T. V. Dong, K. Dort, S. Dubey, S. Duell, S. Eidelman, M. Eliachevitch, T. Ferber, D. Ferlewicz, G. Finocchiaro, S. Fiore, A. Fodor, F. Forti, A. Frey, B. G. Fulsom, M. Gabriel, E. Ganiev

    Chinese Physics C   44 ( 2 )   021001-1 - 021001-12   2020年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd. From April to July 2018, a data sample at the peak energy of the γ(4S) resonance was collected with the Belle II detector at the SuperKEKB electron-positron collider. This is the first data sample of the Belle II experiment. Using Bhabha and digamma events, we measure the integrated luminosity of the data sample to be (496.3 ± 0.3 ± 3.0) pb-1, where the first uncertainty is statistical and the second is systematic. This work provides a basis for future luminosity measurements at Belle II.

    DOI: 10.1088/1674-1137/44/2/021001

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  • Update of inclusive cross sections of single and pairs of identified light charged hadrons 査読

    R. Seidl, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, I. Badhrees, P. Behera, K. Belous, J. Bennett, B. Bhuyan, J. Biswal, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, M. -C. Chang, V. Chekelian, A. Chen, K. Chilikin, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, K. Hayasaka, H. Hayashii, W. -S. Hou, K. Huang, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, G. Karyan, D. Y. Kim, S. H. Kim, P. Kodyš, S. Korpar, P. Križan, R. Kroeger, P. Krokovny, A. Kuzmin, Y. -J. Kwon, S. C. Lee, Y. B. Li, L. Li Gioi, J. Libby, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, R. Mizuk, R. Mussa, M. Nakao, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, S. -H. Park, S. Patra, S. Paul, T. K. Pedlar, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Ritter, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, M. E. Sevior, M. Shapkin, V. Shebalin, J. -G. Shiu, B. Shwartz, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, Y. Usov, R. Van Tonder, G. Varner, V. Vorobyev, A. Vossen, C. H. Wang, M. -Z. Wang, P. Wang, S. Watanuki, E. Won, X. Xu, S. B. Yang, J. Yelton, Z. P. Zhang, V. Zhilich, V. Zhukova

    2020年1月

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    We report new measurements of the production cross sections of pairs of
    charged pions and kaons as a function of their fractional energies using
    various fractional-energy definitions. Two different fractional-energy
    definitions were used and compared to the conventional fractional-energy
    definition reported previously. The new variables aim at either identifying
    dihadron cross sections in terms of single-hadron fragmentation functions, or
    to provide a means of characterizing the transverse momentum created in the
    fragmentation process. The results were obtained applying the updated
    initial-state radiation correction used in other recent Belle publications on
    light-hadron production cross sections. In addition, production cross sections
    of single charged pions, kaons, and protons were also updated using this
    initial-state radiation correction. The cross sections are obtained from a
    $558\,{\rm fb}^{-1}$ data sample collected at the $\Upsilon(4S)$ resonance with
    the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider.

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  • Observation of a vector charmoniumlike state in e+e-→ Ds+ Ds1 (2536)-+ c. c. 査読

    S. Jia, C. P. Shen, C. Z. Yuan, X. L. Wang, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, P. Behera, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, S. Di Carlo, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, H. Kichimi, B. H. Kim, C. H. Kim, D. Y. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, R. Kroeger, P. Krokovny, R. Kulasiri, A. Kuzmin, Y. J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, P. Lewis, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata

    Physical Review D   100 ( 11 )   2019年12月

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    掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. Using a data sample of 921.9 fb-1 collected with the Belle detector, we study the process of e+e-→Ds+Ds1(2536)-+c.c. via initial-state radiation. We report the first observation of a vector charmoniumlike state decaying to Ds+Ds1(2536)-+c.c. with a significance of 5.9σ, including systematic uncertainties. The measured mass and width are (4625.9-6.0+6.2(stat)±0.4(syst)) MeV/c2 and (49.8-11.5+13.9(stat)±4.0(syst)) MeV, respectively. The product of the e+e-→Ds+Ds1(2536)-+c.c. cross section and the branching fraction of Ds1(2536)-→D∗0K-is measured from the DsDs1(2536) threshold to 5.59 GeV.

    DOI: 10.1103/PhysRevD.100.111103

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  • Search for an invisibly decaying $Z^{\prime}$ boson at Belle II in $e^+ e^- \to μ^+ μ^- (e^{\pm} μ^{\mp})$ plus missing energy final states 査読

    Belle II Collaboration, I. Adachi, P. Ahlburg, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, T. Aziz, V. Babu, S. Baehr, P. Bambade, Sw. Banerjee, V. Bansal, M. Barrett, J. Baudot, J. Becker, P. K. Behera, J. V. Bennett, E. Bernieri, F. U. Bernlochner, M. Bertemes, M. Bessner, S. Bettarini, F. Bianchi, D. Biswas, A. Bozek, M. Bračko, P. Branchini, R. A. Briere, T. E. Browder, A. Budano, L. Burmistrov, S. Bussino, M. Campajola, L. Cao, G. Casarosa, C. Cecchi, D. Červenkov, M. -C. Chang, R. Cheaib, V. Chekelian, Y. Q. Chen, Y. -T. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. Cho, S. -K. Choi, S. Choudhury, D. Cinabro, L. Corona, L. M. Cremaldi, S. Cunliffe, T. Czank, F. Dattola, E. De La Cruz-Burelo, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, S. Dey, A. De Yta-Hernandez, F. Di Capua, Z. Doležal, I. Domínguez Jiménez, T. V. Dong, K. Dort, D. Dossett, S. Dubey, S. Duell, G. Dujany, S. Eidelman, M. Eliachevitch, J. E. Fast, T. Ferber, D. Ferlewicz, G. Finocchiaro, S. Fiore, A. Fodor, F. Forti, B. G. Fulsom, E. Ganiev, M. Garcia-Hernandez, R. Garg, V. Gaur, A. Gaz, A. Gellrich, J. Gemmler, T. Geßler, R. Giordano, A. Giri, B. Gobbo, R. Godang, P. Goldenzweig, B. Golob, P. Gomis, W. Gradl, E. Graziani, D. Greenwald, Y. Guan, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, C. Hearty, M. T. Hedges, I. Heredia de la Cruz, M. Hernández Villanueva, A. Hershenhorn, T. Higuchi, E. C. Hill, M. Hoek, C. -L. Hsu, Y. Hu, T. Iijima, K. Inami, G. Inguglia, J. Irakkathil Jabbar, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, D. E. Jaffe, E. -J. Jang, H. B. Jeon, S. Jia, Y. Jin, C. Joo, K. K. Joo, J. Kahn, H. Kakuno, A. B. Kaliyar, J. Kandra, G. Karyan, Y. Kato, T. Kawasaki, B. H. Kim, C. -H. Kim, D. Y. Kim, K. -H. Kim, S. -H. Kim, Y. K. Kim, Y. Kim, T. D. Kimmel, H. Kindo, C. Kleinwort, P. Kodyš, T. Koga, S. Kohani, I. Komarov, S. Korpar, N. Kovalchuk, T. M. G. Kraetzschmar, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, J. Kumar, M. Kumar, R. Kumar, K. Kumara, S. Kurz, A. Kuzmin, Y. -J. Kwon, S. Lacaprara, C. La Licata, L. Lanceri, J. S. Lange, K. Lautenbach, I. -S. Lee, S. C. Lee, P. Leitl, D. Levit, L. K. Li, Y. B. Li, J. Libby, K. Lieret, L. Li Gioi, Z. Liptak, Q. Y. Liu, D. Liventsev, S. Longo, T. Luo, Y. Maeda, M. Maggiora, E. Manoni, S. Marcello, C. Marinas, A. Martini, M. Masuda, T. Matsuda, K. Matsuoka, D. Matvienko, F. Meggendorfer, J. C. Mei, F. Meier, M. Merola, F. Metzner, M. Milesi, C. Miller, K. Miyabayashi, H. Miyake, R. Mizuk, K. Azmi, G. B. Mohanty, T. Moon, T. Morii, H. -G. Moser, F. Mueller, F. J. Müller, Th. Muller, G. Muroyama, R. Mussa, E. Nakano, M. Nakao, M. Nayak, G. Nazaryan, D. Neverov, C. Niebuhr, N. K. Nisar, S. Nishida, K. Nishimura, M. Nishimura, B. Oberhof, K. Ogawa, Y. Onishchuk, H. Ono, Y. Onuki, P. Oskin, H. Ozaki, P. Pakhlov, G. Pakhlova, A. Paladino, A. Panta, E. Paoloni, H. Park, B. Paschen, A. Passeri, A. Pathak, S. Paul, T. K. Pedlar, I. Peruzzi, R. Peschke, R. Pestotnik, M. Piccolo, L. E. Piilonen, V. Popov, C. Praz, E. Prencipe, M. T. Prim, M. V. Purohit, P. Rados, R. Rasheed, S. Reiter, M. Remnev, P. K. Resmi, I. Ripp-Baudot, M. Ritter, G. Rizzo, L. B. Rizzuto, S. H. Robertson, D. Rodríguez Pérez, J. M. Roney, C. Rosenfeld, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, A. Sangal, L. Santelj, P. Sartori, Y. Sato, V. Savinov, B. Scavino, J. Schueler, C. Schwanda, R. M. Seddon, Y. Seino, A. Selce, K. Senyo, C. Sfienti, C. P. Shen, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, R. J. Sobie, A. Soffer, A. Sokolov, E. Solovieva, S. Spataro, B. Spruck, M. Starič, S. Stefkova, Z. S. Stottler, R. Stroili, J. Strube, M. Sumihama, T. Sumiyoshi, D. J. Summers, S. Y. Suzuki, M. Tabata, M. Takizawa, U. Tamponi, S. Tanaka, K. Tanida, N. Taniguchi, P. Taras, F. Tenchini, E. Torassa, K. Trabelsi, T. Tsuboyama, M. Uchida, K. Unger, Y. Unno, S. Uno, Y. Ushiroda, S. E. Vahsen, R. van Tonder, G. S. Varner, K. E. Varvell, A. Vinokurova, L. Vitale, A. Vossen, M. Wakai, H. M. Wakeling, W. Wan Abdullah, C. H. Wang, M. -Z. Wang, A. Warburton, M. Watanabe, J. Webb, S. Wehle, C. Wessel, J. Wiechczynski, H. Windel, E. Won, B. Yabsley, S. Yamada, W. Yan, S. B. Yang, H. Ye, J. H. Yin, M. Yonenaga, C. Z. Yuan, Y. Yusa, L. Zani, Z. Zhang, V. Zhilich, Q. D. Zhou, X. Y. Zhou, V. I. Zhukova

    2019年12月

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    Theories beyond the standard model often predict the existence of an
    additional neutral boson, the $Z^{\prime}$. Using data collected by the Belle
    II experiment during 2018 at the SuperKEKB collider, we perform the first
    searches for the invisible decay of a $Z^{\prime}$ in the process $e^+ e^- \to
    \mu^+ \mu^- Z^{\prime}$ and of a lepton-flavor-violating $Z^{\prime}$ in $e^+
    e^- \to e^{\pm} \mu^{\mp} Z^{\prime}$. We do not find any excess of events and
    set 90\% credibility level upper limits on the cross sections of these
    processes. We translate the former, in the framework of an $L_{\mu}-L_{\tau}$
    theory, into upper limits on the $Z^{\prime}$ coupling constant at the level of
    $5 \times 10^{-2}$ -- $1$ $M_{Z^\prime}\leq 6$ GeV/$c^2$.

    arXiv

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  • Measurements of the branching fractions $\mathcal{B}\mathbf{(}{B}^{ { - } }{\rightarrow}{\overline{ { {\Lambda } } } }_{c}^{ { - } }{ { {\Xi } } }_{c}^{ { '}0}\mathbf{)}$, $\mathcal{B}\mathbf{(}{B}^{ { - } }{\rightarrow}{\overline{ { {\Lambda } } } }_{c}^{ { - } }{ { {\Xi } } }_{c}\mathbf{(}2645{)}^{0}\mathbf{)}$ and $\mathcal{B}\mathbf{(}{B}^{ { - } }{\rightarrow}{\overline{ { {\Lambda } } } }_{c}^{ { - } }{ { {\Xi } } }_{c}\mathbf{(}2790{\mathbf{) } }^{0}\mathbf{)}$ 査読 国際共著 国際誌

    The Belle collaboration (K.Hayasaka は 177人中53番目)

    Phys. Rev. D   100 ( 11 )   112010-1 - 112010-8   2019年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.100.112010

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  • Measurements of the Branching Fractions ${\cal B}(B^{-} \to \barΛ_{c}^{-} Ξ_{c}^{'0})$, ${\cal B}(B^{-} \to \barΛ_{c}^{-} Ξ_{c}(2645)^{0})$ and ${\cal B}(B^{-} \to \barΛ_{c}^{-} Ξ_{c}(2790)^{0}) $ 査読

    Belle Collaboration, Y. Li, Y. B. Li, C. P. Shen, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, P. Behera, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, G. De Nardo, F. Di Capua, S. Di Carlo, Z. Doležal, T. V. Dong, S. Eidelman, J. E. Fast, T. Ferber, D. Ferlewicz, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, B. Grube, T. Hara, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, G. Karyan, H. Kichimi, C. H. Kim, D. Y. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. -J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, P. Lewis, C. H. Li, L. K. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, C. MacQueen, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, H. Miyata, R. Mizuk, R. Mussa, K. J. Nath, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, T. Pang, S. Pardi, H. Park, S. -H. Park, S. Patra, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, M. Röhrken, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, J. -G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, Z. S. Stottler, M. Sumihama, T. Sumiyoshi, W. Sutcliffe, M. Takizawa, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, R. Van Tonder, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, X. L. Wang, M. Watanabe, E. Won, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    2019年11月

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    Using the data sample of 711 fb$^{-1}$ of $\Upsilon(4S)$ on-resonance data
    taken by the Belle detector at the KEKB asymmetric-energy electron-positron
    collider, we present the first measurements of branching fractions of the
    decays $B^{-} \to \bar{\Lambda}_{c}^{-} \Xi_{c}^{'0}$, $B^{-} \to
    \bar{\Lambda}_{c}^{-} \Xi_{c}(2645)^{0}$, and $B^{-} \to \bar{\Lambda}_{c}^{-}
    \Xi_{c}(2790)^{0} $. The signal yields for these decays are extracted from the
    recoil mass spectrum of the system recoiling against $\bar{\Lambda}_{c}^{-}$
    baryons in selected $B^-$ candidates. The branching fraction of $B^{-} \to
    \bar{\Lambda}_{c}^{-} \Xi_{c}(2790)^{0}$ is measured to be $ (1.1 \pm 0.4 \pm
    0.2)\times 10^{-3}$, where the first uncertainty is statistical and the second
    systematic. The 90\% credibility level upper limits on ${\cal B}(B^{-} \to
    \bar{\Lambda}_{c}^{-} \Xi_{c}^{'0})$ and ${\cal B}(B^{-} \to
    \bar{\Lambda}_{c}^{-} \Xi_{c}(2645)^{0})$ are determined to be $6.5\times
    10^{-4}$ and $7.9\times 10^{-4}$, respectively.

    DOI: 10.1103/PhysRevD.100.112010

    arXiv

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  • Azimuthal asymmetries of back-to-back ${\pi}^{\pm}{-}({\pi}^{0},{\eta},{\pi}^{\pm})$ pairs in ${e}^{+}{e}^{ { - } }$ annihilation 査読 国際共著 国際誌

    The Belle collaboration (K.Hayasaka は 133人中39番目)

    Phys. Rev. D   100 ( 9 )   092008-1 - 092008-26   2019年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.100.092008

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  • Observation of τ- →π-ντe+e- and search for τ- →π-ντμ+μ- 査読 国際共著 国際誌

    Y. Jin, H. Aihara, D. Epifanov, I. Adachi, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, V. Bansal, P. Behera, M. Berger, V. Bhardwaj, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, M. Campajola, L. Cao, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Di Carlo, Z. DoleŽal, T. V. Dong, D. Dossett, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, D. Greenwald, O. Grzymkowska, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, K. Huang, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, D. Joffe, K. K. Joo, J. Kahn, A. B. Kaliyar, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, R. Kulasiri, R. Kumar, A. Kuzmin, Y. J. Kwon, K. Lalwani, J. S. Lange, J. Y. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret

    Physical Review D   100 ( 7 )   071101-1 - 071101-9   2019年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. We present the first measurements of branching fractions of rare tau-lepton decays, τ-→π-ντ+- (=e or μ), using a data sample corresponding to 562 fb-1 collected at a center-of-mass energy of 10.58 GeV with the Belle detector at the KEKB asymmetric-energy e+e- collider. The τ-→π-ντe+e- decay is observed for the first time with 7.0σ significance. The partial branching fraction determined by the structure-dependent mechanisms mediated by either a vector or an axial-vector current for the mass region Mπee>1.05 GeV/c2 is measured to be B(τ-→π-ντe+e-)[Mπ-e+e->1.05 GeV/c2]=(5.90±0.53±0.85±0.11)×10-6, where the first uncertainty is statistical, the second is systematic, and the third is due to model dependence. In the full phase space, due to the different detection efficiencies for the structure-dependent mechanisms mediated by axial-vector and vector currents, the branching fraction varies from BA(τ-→π-ντe+e-)=(1.46±0.13±0.21)×10-5 to BV(τ-→π-ντe+e-)=(3.01±0.27±0.43)×10-5, respectively. An upper limit is set on the branching fraction of the τ-→π-ντμ+μ- decay, B(τ-→π-ντμ+μ-)<1.14×10-5, at the 90% confidence level.

    DOI: 10.1103/PhysRevD.100.071101

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  • Observation of a new structure near 10.75 GeV in the energy dependence of the e <sup>+</sup> e <sup>−</sup> → ϒ (nS)π <sup>+</sup> π <sup>−</sup> (n = 1, 2, 3) cross sections 査読

    Mizuk R, Bondar A, Adachi I, Aihara H, Asner D.M, Aulchenko V, Aushev T, Ayad R, Badhrees I, Bahinipati S, Bakich A.M, Behera P, Bele{\~n}o C, Berger M, Bhardwaj V, Bilka T, Biswal J, Bozek A, Bra?ko M, Browder T.E, Campajola M, Cao L, ?ervenkov D, Chen A, Cheon B.G, Chilikin K, Cho H.E, Cho K, Choi S.-K, Choi Y, Cinabro D, Cunliffe S, Dash N, De Nardo G, Di Capua F, Di Carlo S, Dole?al Z, Dong T.V, Eidelman S, Epifanov D, Fast J.E, Ferber T, Fulsom B.G, Gaur V, Garmash A, Giri A, Goldenzweig P, Golob B, Grzymkowska O, Hara T, Hartbrich O, Hayasaka K, Hayashii H, Hou W.-S, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs W.W, Jin Y, Joffe D, Joo K.K, Kang K.H, Karyan G, Kawasaki T, Kichimi H, Kim D.Y, Kim H.J, Kim K.T, Kim S.H, Kinoshita K, Kody? P, Korpar S, Kotchetkov D, Kri?an P, Kroeger R, Krokovny P, Kuhr T, Kumar R, Kuzmin A, Lange J.S, Lee J.Y, Lee S.C, Li L.K, Gioi L.L, Libby J, Lieret K, Liventsev D, Luo T, MacNaughton J, MacQueen C, Masuda M, Matsuda T, Matvienko D, Merola M, Miyata H, Mohanty G.B, Mori T, Mussa R, Nakano T, Nakao M, Nath K.J, Natkaniec Z, Nayak M, Niiyama M, Nisar N.K, Nishida S, Nishimura K, Ogawa S, Olsen S.L, Ono H, Onuki Y, Oskin P, Ostrowicz W, Pakhlov P, Pakhlova G, Pal B, Pang T, Pardi S, Park S.-H, Paul S, Pedlar T.K, Pestotnik R, Piilonen L.E, Popov V, Prencipe E, Ritter M, Rostomyan A, Russo G, Sakai Y, Salehi M, Sandilya S, Sanuki T, Savinov V, Schneider O, Schnell G, Schueler J, Schwanda C, Seino Y, Senyo K, Seon O, Sevior M.E, Shebalin V, Shen C.P, Shiu J.-G, Shwartz B, Sokolov A, Solovieva E, Stari? M, Strube J.F, Sumihama M, Sumiyoshi T, Sutcliffe W, Takizawa M, Tamponi U, Tanida K, Tenchini F, Trabelsi K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Vahsen S.E, Van Tonder R, Varner G, Vinokurova A, Wang B, Wang C.H, Wang M.-Z, Wang P, Won E, Yang S.B, Ye H, Yuan C.Z, Yusa Y, Zhang Z.P, Zhilich V, Zhukova V

    Journal of High Energy Physics   2019 ( 10 )   2019年10月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1007/JHEP10(2019)220

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  • First measurement of the CKM angle ϕ <inf>3</inf> withS B <sup>±</sup> → D(KS0 π <sup>+</sup> π <sup> −</sup> π <sup>0</sup>) K <sup>±</sup> decays 査読

    P. K. Resmi, J. Libby, K. Trabelsi, et. al, Belle Collaboation

    Journal of High Energy Physics   2019 ( 10 )   2019年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019, The Author(s). We present the first model-independent measurement of the CKM unitarity triangle angle ϕ3 using B±→ D(KS0π+π−π0) K± decays, where D indicates either a D0 or D¯ 0 meson. Measurements of the strong-phase difference of the D →KS0π+π−π0 amplitude obtained from CLEO-c data are used as input. This analysis is based on the full Belle data set of 772 × 106BB¯ events collected at the Υ(4S) resonance. We obtain ϕ3 = (5.7−8.8+10.2±3.5±5.7)° and the suppressed amplitude ratio rB = 0.323±0.147±0.023±0.051. Here the first uncertainty is statistical, the second is the experimental systematic, and the third is due to the precision of the strong-phase parameters measured from CLEO-c data. The 95% confidence interval on ϕ3 is (−29.7, 109.5)°, which is consistent with the current world average. [Figure not available: see fulltext.]

    DOI: 10.1007/JHEP10(2019)178

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  • Measurement of the CKM matrix element |Vcb | from B0 →d∗-ℓ+νℓ at Belle 査読

    E. Waheed, P. Urquijo, D. Ferlewicz, et. al, Belle Collaboation

    Physical Review D   100 ( 5 )   2019年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. We present a new measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| from B0→D∗-ℓ+νℓ decays, reconstructed with the full Belle data set of 711 fb-1 integrated luminosity. Two form factor parametrizations, originally conceived by the Caprini-Lellouch-Neubert (CLN) and the Boyd, Grinstein and Lebed (BGL) groups, are used to extract the product F(1)ηEW|Vcb| and the decay form factors, where F(1) is the normalization factor and ηEW is a small electroweak correction. In the CLN parametrization we find F(1)ηEW|Vcb|=(35.06±0.15±0.56)×10-3, ρ2=1.106±0.031±0.007, R1(1)=1.229±0.028±0.009, R2(1)=0.852±0.021±0.006. For the BGL parametrization we obtain F(1)ηEW|Vcb|=(34.93±0.23±0.59)×10-3, which is consistent with the world average when correcting for F(1)ηEW. The branching fraction of B0→D∗-ℓ+νℓ is measured to be B(B0→D∗-ℓ+νℓ)=(4.90±0.02±0.16)%. We also present a new test of lepton flavor universality violation in semileptonic B decays, B(B0→D∗-e+ν)B(B0→D∗-μ+ν)=1.01±0.01±0.03. The errors quoted correspond to the statistical and systematic uncertainties, respectively. This is the most precise measurement of F(1)ηEW|Vcb| and form factors to date and the first experimental study of the BGL form factor parametrization in an experimental measurement.

    DOI: 10.1103/PhysRevD.100.052007

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  • Search for ω (2012) →k Ξ (1530) →kπ Ξ at Belle 査読 国際共著 国際誌

    S. Jia, C. P. Shen, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, A. M. Bakich, P. Behera, C. Beleño, J. Bennett, M. Berger, V. Bhardwaj, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, G. De Nardo, F. Di Capua, S. Di Carlo, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, O. Hartbrich, K. Hayasaka, H. Hayashii, W. S. Hou, K. Huang, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, Y. Jin, D. Joffe, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, D. Y. Kim, H. J. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, R. Kumar, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, J. K. Lee, J. Y. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret

    Physical Review D   100 ( 3 )   032006-1 - 032006-11   2019年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . Using data samples of e+e- collisions collected at the I(1S), I(2S), and I(3S) resonances with the Belle detector, we search for the three-body decay of the ω(2012) baryon to KπΞ. This decay is predicted to dominate for models describing the ω(2012) as a KΞ(1530) molecule. No significant ω(2012) signals are observed in the studied channels, and 90% credibility level upper limits on the ratios of the branching fractions relative to KΞ decay modes are obtained.

    DOI: 10.1103/PhysRevD.100.032006

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  • First measurements of absolute branching fractions of the Ξc+ baryon at Belle 査読 国際共著 国際誌

    Y. B. Li, C. P. Shen, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, A. M. Bakich, Y. Ban, V. Bansal, P. Behera, C. Beleño, M. Berger, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Di Carlo, Z. DoleŽal, D. Dossett, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Grube, O. Grzymkowska, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Joffe, K. K. Joo, A. B. Kaliyar, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, C. H. Kim, D. Y. Kim, H. J. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, J. K. Lee, J. Y. Lee, S. C. Lee, C. H. Li, L. K. Li, L. Li Gioi

    Physical Review D   100 ( 3 )   031101-1 - 031101-8   2019年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We present the first measurements of the absolute branching fractions of Ξc+ decays into Ξ-π+π+ and pK-π+ final states. Our analysis is based on a data set of (772±11)×106 BB̄ pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e- collider. We measure the absolute branching fraction of B̄0→Λ̄c-Ξc+ with the Ξc+ recoiling against Λ̄c- in B̄0 decays resulting in B(B̄0→Λ̄c-Ξc+)=[1.16±0.42(stat.)±0.15(syst.)]×10-3. We then measure the product branching fractions B(B̄0→Λ̄c-Ξc+)B(Ξc+→Ξ-π+π+) and B(B̄0→Λ̄c-Ξc+)B(Ξc+→pK-π+). Dividing these product branching fractions by B̄0→Λ̄c-Ξc+ yields B(Ξc+→Ξ-π+π+)=[2.86±1.21(stat.)±0.38(syst.)]% and B(Ξc+→pK-π+)=[0.45±0.21(stat.)±0.07(syst.)]%. Our result for B(Ξc+→Ξ-π+π+) can be combined with Ξc+ branching fractions measured relative to Ξc+→Ξ-π+π+ to set the absolute scale for many Ξc+ branching fractions.

    DOI: 10.1103/PhysRevD.100.031101

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  • Search for B0 →x (3872)γ 査読 国際共著 国際誌

    P. C. Chou, P. Chang, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, P. Behera, J. Bennett, M. Berger, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, O. Grzymkowska, J. Haba, O. Hartbrich, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Joffe, K. K. Joo, A. B. Kaliyar, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, R. Kulasiri, R. Kumar, T. Kumita, A. Kuzmin, Y. J. Kwon, Y. T. Lai, J. S. Lange, J. K. Lee, J. Y. Lee, S. C. Lee, C. H. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret

    Physical Review D   100 ( 1 )   012002-1 - 012002-8   2019年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. We report the results of a search for the decay B0→X(3872)(→J/ψπ+π-)γ. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb-1 and containing 772×106BB pairs, collected with the Belle detector at the KEKB asymmetric-energy e+e- collider running at the (4S) resonance energy. We find no evidence for a signal and place an upper limit of B(B0→X(3872)γ)×B(X(3872)→J/ψπ+π-)<5.1×10-7 at 90% confidence level.

    DOI: 10.1103/PhysRevD.100.012002

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  • Measurement of branching fraction and final-state asymmetry for the ${\overline{B } }^{0}{\rightarrow}{K}_{S}^{0}{K}^{ { \mp } }{ { \pi } }^{\pm}$ decay 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   100 ( 1 )   011101-1 - 011101-9   2019年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.100.011101

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  • Evidence for ${B}^{+}{\rightarrow}{h}_{c}{K}^{+}$ and observation of ${ { \eta } }_{c}(2S){\rightarrow}p\overline{p}{ { \pi } }^{+}{ { \pi } }^{ { - } }$ 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   100 ( 1 )   012001-1 - 012001-16   2019年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.100.012001

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  • Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive e+e- annihilation at s =10.58 GeV 査読

    R. Seidl, I. Adachi, J. K. Ahn, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, A. M. Bakich, V. Bansal, P. Behera, C. Beleño, M. Berger, V. Bhardwaj, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, L. Cao, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Di Carlo, Z. DoleŽal, T. V. Dong, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, K. Hayasaka, H. Hayashii, W. S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, T. Kawasaki, H. Kichimi, C. Kiesling, C. H. Kim, D. Y. Kim, H. J. Kim, J. B. Kim, S. H. Kim, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, J. K. Lee, J. Y. Lee, S. C. Lee, D. Levit, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, J. Macnaughton, M. Masuda, T. Matsuda

    Physical Review D   99 ( 11 )   112006-1 - 112006-15   2019年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. We report measurements of the production cross sections of charged pions, kaons, and protons as a function of fractional energy, the event-shape variable called thrust, and the transverse momentum with respect to the thrust axis. These measurements access the transverse momenta created in the fragmentation process, which are of critical importance to the understanding of any transverse-momentum-dependent distribution and fragmentation functions. The low transverse-momentum part of the cross sections can be well described by Gaussians in transverse momentum as is generally assumed but the fractional-energy dependence is nontrivial and different hadron types have varying Gaussian widths. The width of these Gaussians decreases with thrust and shows an initially rising, then decreasing fractional-energy dependence. The widths for pions and kaons are comparable within uncertainties, while those for protons are significantly narrower. These single-hadron cross sections and Gaussian widths are obtained from a 558 fb-1 data sample collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.

    DOI: 10.1103/PhysRevD.99.112006

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  • Search for $X(3872)$ and $X(3915)$ decay into ${ { \chi } }_{c1}{ { \pi } }^{0}$ in $B$ decays at Belle 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   99 ( 11 )   111101-1 - 111101-8   2019年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.99.111101

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  • A new approach for measuring the muon anomalous magnetic moment and electric dipole moment 査読

    M. Abe, S. Bae, G. Beer, G. Bunce, H. Choi, S. Choi, M. Chung, W. Da Silva, S. Eidelman, M. Finger, Y. Fukao, T. Fukuyama, S. Haciomeroglu, K. Hasegawa, K. Hayasaka, N. Hayashizaki, H. Hisamatsu, T. Iijima, H. Iinuma, H. Ikeda, M. Ikeno, K. Inami, K. Ishida, T. Itahashi, M. Iwasaki, Y. Iwashita, Y. Iwata, R. Kadono, S. Kamal, T. Kamitani, S. Kanda, F. Kapusta, K. Kawagoe, N. Kawamura, B. Kim, Y. Kim, T. Kishishita, R. Kitamura, H. Ko, T. Kohriki, Y. Kondo, T. Kume, M. J. Lee, S. Lee, W. Lee, G. M. Marshall, Y. Matsuda, T. Mibe, Y. Miyake, T. Murakami, K. Nagamine, H. Nakayama, S. Nishimura, D. Nomura, T. Ogitsu, S. Ohsawa, K. Oide, Y. Oishi, S. Okada, A. Olin, Z. Omarov, M. Otani, G. Razuvaev, A. Rehman, N. Saito, N. F. Saito, K. Sasaki, O. Sasaki, N. Sato, Y. Sato, Y. K. Semertzidis, H. Sendai, Y. Shatunov, K. Shimomura, M. Shoji, B. Shwartz, P. Strasser, Y. Sue, T. Suehara, C. Sung, K. Suzuki, T. Takatomi, M. Tanaka, J. Tojo, Y. Tsutsumi, T. Uchida, K. Ueno, S. Wada, E. Won, H. Yamaguchi, T. Yamanaka, A. Yamamoto, T. Yamazaki, H. Yasuda, M. Yoshida, T. Yoshioka

    Progress of Theoretical and Experimental Physics   2019 ( 5 )   2019年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 The Author(s). This paper introduces a new approach to measure the muon magnetic moment anomaly aμ = (g - 2)/2 and the muon electric dipole moment (EDM) dμ at the J-PARC muon facility. The goal of our experiment is to measure aμ and dμ using an independent method with a factor of 10 lower muon momentum, and a factor of 20 smaller diameter storage-ring solenoid compared with previous and ongoing muon g - 2 experiments with unprecedented quality of the storage magnetic field. Additional significant differences from the present experimental method include a factor of 1000 smaller transverse emittance of the muon beam (reaccelerated thermal muon beam), its efficient vertical injection into the solenoid, and tracking each decay positron from muon decay to obtain its momentum vector. The precision goal for aμ is a statistical uncertainty of 450 parts per billion (ppb), similar to the present experimental uncertainty, and a systematic uncertainty less than 70 ppb. The goal for EDM is a sensitivity of 1.5 × 10-21 ecm.

    DOI: 10.1093/ptep/ptz030

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  • Evidence for the decay ${B}^{0}{\rightarrow}p\overline{p}{ { \pi } }^{0}$ 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   99 ( 9 )   091104-1 - 091104-8   2019年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.99.091104

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  • Search for the B →y (4260)K, y (4260) →j /ψπ+π- decays 査読

    R. Garg, V. Bhardwaj, J. B. Singh, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, V. Bansal, C. Beleño, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, L. Cao, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. DoleŽal, T. V. Dong, Z. Drásal, S. Eidelman, J. E. Fast, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, B. Golob, O. Grzymkowska, J. Haba, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, T. Kawasaki, H. Kichimi, D. Y. Kim, J. B. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kumar, Y. J. Kwon, J. S. Lange, J. K. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, P. C. Lu, T. Luo, J. Macnaughton, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, T. Mori

    Physical Review D   99 ( 7 )   071102-1 - 071102-8   2019年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. We report the results of a search for the B→Y(4260)K, Y(4260)→J/ψπ+π- decays. This study is based on a data sample corresponding to an integrated luminosity of 711 fb-1, collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We investigate the J/ψπ+π- invariant mass distribution in the range 4.0 to 4.6 GeV/c2 using both B+→J/ψπ+π-K+ and B0→J/ψπ+π-KS0 decays. We find excesses of events above the background levels, with significances of 2.1 and 0.9 standard deviations for charged and neutral B→Y(4260)K decays, respectively, taking into account the systematic uncertainties. These correspond to upper limits on the product of branching fractions, B(B+→Y(4260)K+)×B(Y(4260)→J/ψπ+π-)<1.4×10-5 and B(B0→Y(4260)K0)×B(Y(4260)→J/ψπ+π-)<1.7×10-5 at the 90% confidence level.

    DOI: 10.1103/PhysRevD.99.071102

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  • First measurements of absolute branching fractions of the Ξc <inf>0</inf> Baryon at Belle 査読

    Y. B. Li, C. P. Shen, C. Z. Yuan, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, I. Badhrees, Y. Ban, V. Bansal, C. Belenõ, M. Berger, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bondar, A. Bozek, M. Bračko, L. Cao, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, S. Di Carlo, Z. DoleŽal, T. V. Dong, Z. Drásal, S. Eidelman, J. E. Fast, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, D. Greenwald, B. Grube, K. Hayasaka, H. Hayashii, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Joffe, K. K. Joo, G. Karyan, T. Kawasaki, H. Kichimi, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kumita, A. Kuzmin, Y. J. Kwon, J. Y. Lee, S. C. Lee, L. K. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, J. Macnaughton, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, R. Mussa, E. Nakano, M. Nakao, K. J. Nath, M. Nayak, M. Niiyama

    Physical Review Letters   122 ( 8 )   082001-1 - 082001-7   2019年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 Authors. Published by the American Physical Society. We present the first measurements of absolute branching fractions of Ξc 0 decays into Ξ-π+, ΛK-π+, and pK-K-π+ final states. The measurements are made using a dataset comprising (772±11)×106 BB̄ pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e-collider. We first measure the absolute branching fraction for B-→Λ̄c-Ξc 0 using a missing-mass technique; the result is B(B-→Λ̄c-Ξc 0 )=(9.51±2.10±0.88)×10-4. We subsequently measure the product branching fractions B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →Ξ-π+), B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →ΛK-π+), and B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →pK-K-π+) with improved precision. Dividing these product branching fractions by the result for B-→Λ̄c-Ξc 0 yields the following branching fractions: B(Ξc 0 →Ξ-π+)=(1.80±0.50±0.14)%, B(Ξc 0 →ΛK-π+)=(1.17±0.37±0.09)%, and B(Ξc 0 →pK-K-π+)=(0.58±0.23±0.05)%. For the above branching fractions, the first uncertainties are statistical and the second are systematic. Our result for B(Ξc 0 →Ξ-π+) can be combined with Ξc 0 branching fractions measured relative to Ξc 0 →Ξ-π+ to yield other absolute Ξc 0 branching fractions.

    DOI: 10.1103/PhysRevLett.122.082001

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  • Observation of Ξ (1620)0 and Evidence for Ξ (1690)0 in Ξc+ → Ξ-π+π+ Decays 査読

    M. Sumihama, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, C. Beleño, M. Berger, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, T. Czank, N. Dash, S. Di Carlo, Z. DoleŽal, T. V. Dong, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, S. Hirose, W. S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, G. Karyan, Y. Kato, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, R. Kumar, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda

    Physical Review Letters   122 ( 7 )   072501-1 - 072501-7   2019年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. We report the first observation of the double strange baryon Ξ(1620)0 in its decay to Ξ-π+ via Ξc+→Ξ-π+π+ decays based on a 980 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The mass and width are measured to be 1610.4±6.0(stat)-4.2+6.1 (syst) MeV/c2 and 59.9±4.8(stat)-7.1+2.8(syst) MeV, respectively. We obtain 4.0σ evidence of the Ξ(1690)0 with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S=-2.

    DOI: 10.1103/PhysRevLett.122.072501

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  • Observation of B+ →p Λ ̄ K+K- and B+ → p ̄ Λk+K+ OBSERVATION of ... P.-C. LU et al. 査読

    P. C. Lu, M. Z. Wang, R. Chistov, P. Chang, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, C. Beleño, M. Berger, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, L. Cao, D. Červenkov, M. C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. DoleŽal, T. V. Dong, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, S. Hirose, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. J. Kwon, Y. T. Lai

    Physical Review D   99 ( 3 )   032003-1 - 032003-9   2019年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We report the study of B+→pΛ̄K+K- and B+→p̄ΛK+K+ decays using a 772×106 BB̄ pair data sample recorded on the Ï (4S) resonance with the Belle detector at KEKB. The following branching fractions are measured: B(B+→pΛ̄K+K-)=(4.10-0.43+0.45±0.50)×10-6, B(B+→p̄ΛK+K+)=(3.70-0.37+0.39±0.44)×10-6, B(ηc→pΛ̄K-+c.c.)=(2.83-0.34+0.36±0.35)×10-3 and B(B+→pΛ̄φ)=(7.95±2.09±0.77)×10-7, where c.c. denotes the corresponding charge-conjugation process. The intermediate resonance decays are excluded in the four-body decay measurements. We also find evidence for B(ηc→Λ(1520)Λ̄+c.c.)=(3.48±1.48±0.46)×10-3 and B(B+→Λ(1520)Λ̄K+)=(2.23±0.63±0.25)×10-6. No significant signals are found for J/ψ→Λ(1520)Λ̄+c.c. and B+→Λ̄(1520)ΛK+; we set the 90% confidence level upper limits on their decay branching fractions as <1.80×10-3 and <2.08×10-6, respectively.

    DOI: 10.1103/PhysRevD.99.032003

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  • Measurements of isospin asymmetry and difference of direct CP asymmetries in inclusive B →xsγ decays 査読

    S. Watanuki, A. Ishikawa, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, C. Beleño, M. Berger, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, L. Cao, D. Červenkov, P. Chang, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Di Carlo, J. Dingfelder, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, A. Frey, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, Y. Guan, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, T. Julius, G. Karyan, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kumar, A. Kuzmin, Y. J. Kwon, I. S. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk

    Physical Review D   99 ( 3 )   032012-1 - 032012-13   2019年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We report measurements of isospin asymmetry Δ0- and difference of direct CP asymmetries ΔACP between charged and neutral B→Xsγ decays. This analysis is based on the data sample containing 772×106BB̄ pairs that was collected with the Belle detector at the KEKB energy-asymmetric e+e- collider. Using a sum-of-exclusive technique with invariant Xs mass up to 2.8 GeV/c2, we obtain Δ0-=[-0.48±1.49(stat)±0.97(syst)±1.15(f+-/f00)]% and ΔACP=[+3.69±2.65(stat)±0.76(syst)]%, where the last uncertainty for Δ0- is due to the uncertainty on the production ratio of B+B- to B0B̄0 in Ï (4S) decays. The measured value of Δ0- is consistent with zero, allowing us to constrain the resolved photon contribution in the B→Xsγ, and improve the branching fraction prediction. The result for ΔACP is consistent with the prediction of the SM. We also measure the direct CP asymmetries for charged and neutral B→Xsγ decays. All the measurements are the most precise to date.

    DOI: 10.1103/PhysRevD.99.032012

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  • Measurements of branching fraction and direct $CP$ asymmetry in ${B}^{\pm}{\rightarrow}{K}_{S}^{0}{K}_{S}^{0}{K}^{\pm}$ and a search for ${B}^{\pm}\rightarrow K_S^0K_S^0\pi^\pm$ 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   99 ( 3 )   031102-1 - 031102-9   2019年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.99.031102

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  • Search for a Light CP -odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment 査読

    I. S. Seong, S. E. Vahsen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, A. M. Bakich, V. Bansal, P. Behera, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, L. Cao, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, J. Dingfelder, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, B. Golob, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, T. Higuchi, W. S. Hou, C. L. Hsu, K. Huang, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi

    Physical Review Letters   122 ( 1 )   011801-1 - 011801-8   2019年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. We report on the first Belle search for a light CP-odd Higgs boson, A0, that decays into low mass dark matter, χ, in final states with a single photon and missing energy. We search for events produced via the dipion transition (2S)→ (1S)π+π-, followed by the on-shell process (1S)→γA0 with A0→χχ, or by the off-shell process (1S)→γχχ. Utilizing a data sample of 157.3×106 (2S) decays, we find no evidence for a signal. We set limits on the branching fractions of such processes in the mass ranges MA0<8.97 GeV/c2 and Mχ<4.44 GeV/c2. We then use the limits on the off-shell process to set competitive limits on WIMP-nucleon scattering in the WIMP mass range below 5 GeV/c2.

    DOI: 10.1103/PhysRevLett.122.011801

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  • Measurement of time-dependent CP violation in B0 → KS0 π0π0 decays 査読

    Y. Yusa, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bozek, M. Bračko, T. E. Browder, L. Cao, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, T. V. Dong, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, Y. Guan, J. Haba, K. Hayasaka, H. Hayashii, S. Hirose, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, K. H. Kang, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, T. Kuhr, R. Kumar, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, N. K. Nisar, S. Nishida

    Physical Review D   99 ( 1 )   011102-1 - 011102-7   2019年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We report a measurement of time-dependent CP violation in B0→KS0π0π0 decays using a data sample of 772×106 BB pairs collected by the Belle experiment running at the ?(4S) resonance at the KEKB e+e- collider. This decay proceeds mainly via a b→sdd "penguin" amplitude. The results are sin2φ1eff=0.92-0.31+0.27 (stat.) ±0.11 (syst.) and A=0.28±0.21 (stat.) ±0.04 (syst.), which are the most precise measurements of CP violation in this decay mode to date. The value for the CP-violating parameter sin2φ1eff is consistent with that obtained using decay modes proceeding via a b→ccs "tree" amplitude.

    DOI: 10.1103/PhysRevD.99.011102

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  • Search for CP violation with kinematic asymmetries in the D0 →k+K-π+π- decay 査読

    J. B. Kim, E. Won, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, P. Behera, C. Beleño, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, L. Cao, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, D. Greenwald, Y. Guan, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, S. Jia, Y. Jin, D. Joffe, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, R. Kulasiri, A. Kuzmin, Y. J. Kwon, Y. T. Lai, K. Lalwani, J. S. Lange, I. S. Lee, J. K. Lee, J. Y. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, Z. Liptak, D. Liventsev, P. C. Lu

    Physical Review D   99 ( 1 )   011104-1 - 011104-7   2019年1月

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    © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We search for CP violation in the singly-Cabibbo-suppressed decay D0→K+K-π+π- using data corresponding to an integrated luminosity of 988 fb-1 collected by the Belle detector at the KEKB e+e- collider. We measure a set of five kinematically dependent CP asymmetries, of which four asymmetries are measured for the first time. The set of asymmetry measurements can be sensitive to CP violation via interference between the different partial-wave contributions to the decay and performed on other pseudoscalar decays. We find no evidence of CP violation.

    DOI: 10.1103/PhysRevD.99.011104

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  • Observation of Transverse Λ / Λ Hyperon Polarization in e+e- Annihilation at Belle 査読

    Y. Guan, A. Vossen, I. Adachi, K. Adamczyk, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, C. Beleño, M. Berger, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, L. Cao, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, J. Dingfelder, Z. DoleŽal, T. V. Dong, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, B. Golob, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, S. Hirose, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. J. Kwon, J. S. Lange

    Physical Review Letters   122 ( 4 )   042001-1 - 042001-8   2019年

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    © 2019 authors. We report the first observation of the spontaneous polarization of Λ and Λ hyperons transverse to the production plane in e+e- annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive Λ/Λ production, we also report results with subtracted feed-down contributions from Σ0 and charm. This measurement uses a dataset of 800.4 fb-1 collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV. We observe a significant polarization that rises with the fractional energy carried by the Λ/Λ hyperon.

    DOI: 10.1103/PhysRevLett.122.042001

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  • First Evidence for cos2β&gt;0 and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity 査読

    I. Adachi, T. Adye, H. Ahmed, J. K. Ahn, H. Aihara, S. Akar, M. S. Alam, J. Albert, F. Anulli, N. Arnaud, D. M. Asner, D. Aston, H. Atmacan, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, Sw Banerjee, V. Bansal, R. J. Barlow, G. Batignani, A. Beaulieu, P. Behera, M. Bellis, E. Ben-Haim, D. Bernard, F. U. Bernlochner, S. Bettarini, D. Bettoni, A. J. Bevan, V. Bhardwaj, B. Bhuyan, F. Bianchi, M. Biasini, J. Biswal, V. E. Blinov, M. Bomben, A. Bondar, G. R. Bonneaud, A. Bozek, C. Bozzi, M. Bračko, T. E. Browder, D. N. Brown, D. N. Brown, C. Bünger, P. R. Burchat, A. R. Buzykaev, R. Calabrese, A. Calcaterra, G. Calderini, S. Di Carlo, M. Carpinelli, C. Cartaro, G. Casarosa, R. Cenci, D. S. Chao, J. Chauveau, R. Cheaib, A. Chen, C. Chen, C. H. Cheng, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, S. Choudhury, M. Chrzaszcz, G. Cibinetto, D. Cinabro, J. Cochran, J. P. Coleman, M. R. Convery, G. Cowan, R. Cowan, L. Cremaldi, S. Cunliffe, N. Dash, M. Davier, C. L. Davis, F. De Mori, G. De Nardo, A. G. Denig, R. De Sangro, B. Dey, F. Di Lodovico, S. Dittrich, Z. DoleŽal, J. Dorfan, Z. Drásal, V. P. Druzhinin, W. Dunwoodie, M. Ebert, B. Echenard, S. Eidelman, G. Eigen, A. M. Eisner, S. Emery, D. Epifanov

    Physical Review Letters   121 ( 26 )   261801-1 - 261801-11   2018年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We present first evidence that the cosine of the CP-violating weak phase 2β is positive, and hence exclude trigonometric multifold solutions of the Cabibbo-Kobayashi-Maskawa (CKM) Unitarity Triangle using a time-dependent Dalitz plot analysis of B0→D(∗)h0 with D→KS0π+π- decays, where h0 {π0,η,ω} denotes a light unflavored and neutral hadron. The measurement is performed combining the final data sets of the BABAR and Belle experiments collected at the (4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×106BB pairs recorded by the BABAR detector and (772±11)×106BB pairs recorded by the Belle detector. The results of the measurement are sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle β of the CKM Unitarity Triangle is β=[22.5±4.4(stat)±1.2(syst)±0.6(model)]°. The measurement assumes no direct CP violation in B0→D(∗)h0 decays. The quoted model uncertainties are due to the composition of the D0→KS0π+π- decay amplitude model, which is newly established by performing a Dalitz plot amplitude analysis using a high-statistics e+e-→cc data sample. CP violation is observed in B0→D(∗)h0 decays at the level of 5.1 standard deviations. The significance for cos2β>0 is 3.7 standard deviations. The trigonometric multifold solution π/2-β=(68.1±0.7)° is excluded at the level of 7.3 standard deviations. The measurement resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle.

    DOI: 10.1103/PhysRevLett.121.261801

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  • Observation of I (2S) →γηb (1S) Decay 査読

    B. G. Fulsom, T. K. Pedlar, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, C. Beleño, M. Berger, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, L. Cao, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, J. Dingfelder, Z. DoleŽal, T. V. Dong, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, S. Hirose, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi

    Physical Review Letters   121 ( 23 )   232001-1 - 232001-8   2018年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We report the observation of I(2S)→γηb(1S) decay based on an analysis of the inclusive photon spectrum of 24.7 fb-1 of e+e- collisions at the I(2S) center-of-mass energy collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure a branching fraction of B[I(2S)→γηb(1S)]=(6.1-0.7-0.6+0.6+0.9)×10-4 and derive an ηb(1S) mass of 9394.8-3.1-2.7+2.7+4.5 MeV/c2, where the uncertainties are statistical and systematic, respectively. The significance of our measurement is greater than 7 standard deviations, constituting the first observation of this decay mode.

    DOI: 10.1103/PhysRevLett.121.232001

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  • Search for the rare decay of B+ →+νγ with improved hadronic tagging 査読

    M. Gelb, F. U. Bernlochner, P. Goldenzweig, F. Metzner, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, I. Badhrees, V. Bansal, P. Behera, C. Beleño, B. Bhuyan, J. Biswal, A. Bobrov, M. Bračko, N. Braun, L. Cao, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, J. Gemmler, A. Giri, D. Greenwald, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, W. S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Joffe, K. K. Joo, J. Kahn, A. B. Kaliyar, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, S. H. Kim, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, J. K. Lee, J. Y. Lee, S. C. Lee, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, P. C. Lu, M. Lubej, T. Luo, J. Macnaughton, M. Masuda, M. Merola, K. Miyabayashi

    Physical Review D   98 ( 11 )   112016-1 - 112016-13   2018年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We present the result of the search for the rare B meson decay of B+→+νγ with =e,μ. For the search the full data set recorded by the Belle experiment of 711 fb-1 integrated luminosity near the (4S) resonance is used. Signal candidates are reconstructed for photon energies Eγ larger than 1 GeV using a novel multivariate tagging algorithm. The novel algorithm fully reconstructs the second B meson produced in the collision using hadronic modes and was specifically trained to recognize the signal signature in combination with hadronic tag-side B meson decays. This approach greatly enhances the performance. Background processes that can mimic this signature, mainly charmless semileptonic decays and continuum processes, are suppressed using multivariate methods. The number of signal candidates is determined by analyzing the missing mass squared distribution as inferred from the signal side particles and the kinematic properties of the tag-side B meson. No significant excess over the background-only hypothesis is observed and upper limits on the partial branching fraction ΔB with Eγ>1 GeV individually for electron and muon final states as well as for the average branching fraction of both lepton final states are reported. We find a Bayesian upper limit of ΔB(B+→+νγ)<3.0×10-6 at 90% CL and also report an upper limit on the first inverse moment of the light-cone distribution amplitude of the B meson of λB>0.24 GeV at 90% CL.

    DOI: 10.1103/PhysRevD.98.112016

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  • Measurement of the branching fraction and time-dependent CP asymmetry for B0 →j /ψπ0 decays 査読

    B. Pal, A. J. Schwartz, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, I. Badhrees, S. Bahinipati, V. Bansal, P. Behera, C. Beleño, B. Bhuyan, T. Bilka, J. Biswal, A. Bozek, M. Bračko, L. Cao, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. DoleŽal, S. Eidelman, D. Epifanov, J. E. Fast, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, B. Golob, Y. Guan, T. Hara, K. Hayasaka, H. Hayashii, T. Higuchi, W. S. Hou, C. L. Hsu, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, D. Joffe, T. Julius, G. Karyan, D. Y. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, R. Kulasiri, R. Kumar, A. Kuzmin, Y. J. Kwon, K. Lalwani, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, P. C. Lu, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, T. Mori, E. Nakano, M. Nakao, K. J. Nath, Z. Natkaniec, M. Nayak, S. Nishida, S. Ogawa, H. Ono, G. Pakhlova

    Physical Review D   98 ( 11 )   112008-1 - 112008-8   2018年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We measure the branching fraction and time-dependent CP-violating asymmetry for B0→J/ψπ0 decays using a data sample of 711 fb-1 collected on the (4S) resonance by the Belle experiment running at the KEKB e+e- collider. The branching fraction is measured to be B(B0→J/ψπ0)=[1.62±0.11(stat)±0.06(syst)]×10-5, which is the most precise measurement to date. The measured CP asymmetry parameters are S=-0.59±0.19(stat)±0.03(syst) and A=-0.15±0.14(stat)+0.04-0.03(syst). The mixing-induced CP asymmetry (S) differs from the case of no CP violation by 3.0 standard deviations, and the direct CP asymmetry (A) is consistent with zero.

    DOI: 10.1103/PhysRevD.98.112008

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  • Measurement of the decays Λc → Σππ at Belle 査読

    M. Berger, C. Schwanda, K. Suzuki, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, D. Cinabro, T. Czank, N. Dash, S. Di Carlo, Z. DoleŽal, D. Dutta, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, O. Grzymkowska, Y. Guan, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, S. Jia, Y. Jin, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev

    Physical Review D   98 ( 11 )   112006-1 - 112006-10   2018年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We report measurements of the branching fractions of the decays Λc+→Σ+π-π+, Λc+→Σ0π+π0 and Λc+→Σ+π0π0 relative to the reference channel Λc+→pK-π+. The analysis is based on the full data sample collected at and near the (4S) resonance by the Belle detector at the KEKB asymmetric-energy e+e- collider, corresponding to an integrated luminosity of 711 fb-1. We measure B(Λc+→Σ+π-π+)/B(Λc+→pK-π+)=0.719±0.003±0.024, B(Λc+→Σ0π+π0)/B(Λc+→pK-π+)=0.575±0.005±0.036 and B(Λc+→Σ+π0π0)/B(Λc+→pK-π+)=0.247±0.006±0.019. The listed uncertainties are statistical and systematic, respectively.

    DOI: 10.1103/PhysRevD.98.112006

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  • Measurement of ${cos}2{\beta}$ in ${B}^{0}{\rightarrow}{D}^{\mathbf{(}*\mathbf{) } }{h}^{0}$ with $D{\rightarrow}{K}_{S}^{0}{ { \pi } }^{+}{ { \pi } }^{ { - } }$ decays by a combined time-dependent Dalitz plot analysis of BaBar and Belle data 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   98 ( 11 )   112012-1 - 112012-29   2018年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.98.112012

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  • Observation of e <sup>+</sup> e <sup>-</sup> → γχ <inf>c1</inf> and search for e <sup>+</sup> e <sup>-</sup> → γχ <inf>c0</inf> , γχ <inf>c2</inf> , and γη <inf>c</inf> at √s near 10.6 GeV at Belle 査読

    S. Jia, X. L. Wang, C. P. Shen, C. Z. Yuan, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, V. Bansal, P. Behera, C. Beleño, M. Berger, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, L. Cao, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. DoleŽal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, A. Frey, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, D. Greenwald, J. Haba, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, Y. Jin, D. Joffe, J. Kahn, A. B. Kaliyar, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, A. Kuzmin, Y. J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, J. Y. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li

    Physical Review D   98 ( 9 )   092015-1 - 092015-8   2018年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. Using data samples of 89.5 fb-1, 711.0 fb-1, and 121.4 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at center-of-mass energies 10.52, 10.58, and 10.867 GeV, respectively, we study the exclusive reactions e+e-→γχcJ (J=0, 1, 2) and e+e-→γηc. A significant γχc1 signal is observed for the first time at s=10.58 GeV with a significance of 5.1σ including systematic uncertainties. No significant excesses for γχc0, γχc2, and γηc final states are found, and we set 90% credibility level upper limits on the Born cross sections (σB) at 10.52 GeV, 10.58 GeV, and 10.867 GeV. Together with cross sections measured by BESIII at lower center-of-mass energies, the energy dependency of σB(e+e-→γχc1) is obtained.

    DOI: 10.1103/PhysRevD.98.092015

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  • Observation of e+e- →π+π-π0χb1,2 (1P) and search for e+e- →φχb1,2 (1P) at s =10.96 - 11.05 GeV 査読

    J. H. Yin, C. Z. Yuan, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, P. Behera, C. Beleño, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, L. Cao, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, J. Dingfelder, Z. DoleŽal, T. V. Dong, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, S. Hirose, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev

    Physical Review D   98 ( 9 )   091102-1 - 091102-9   2018年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We report searches for the processes e+e-→π+π-π0χbJ and e+e-→φχbJ (J=1, 2) based on data samples collected by the Belle experiment at the KEKB collider. We report the first observation of the process e+e-→(π+π-π0)non-ωχb1 and first evidence for e+e-→ωχbJ in the vicinity of the ?(11020) resonance, with center-of-mass energies from 10.96 to 11.05 GeV. The significances for (π+π-π0)non-ωχb1 and ωχbJ are greater than 5.3σ and 4.0σ, respectively. We also investigate the energy dependence of the e+e-→π+π-π0χbJ cross section, but we cannot determine whether the contributions are from the ?(10860) and ?(11020) resonances or nonresonant continuum processes. The signals for e+e-→φχbJ are not significant, and the upper limits of the Born cross sections at the 90% confidence level are 0.7 and 1.0 pb for e+e-→φχb1 and φχb2, respectively, for center-of-mass energies from 10.96 to 11.05 GeV.

    DOI: 10.1103/PhysRevD.98.091102

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  • Graph Learning & Fast Transform Coding of 3D River Data 査読

    Weihang Liao, Gene Cheung, Shogo Muramatsu, Hiroyasu Yasuda, Kiyoshi Hayasaka

    Graph Learning & Fast Transform Coding of 3D River Data, Proc. of APSIPA Annual Summit and Conf.   1313 - 1317   2018年11月

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)  

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  • Evidence of a structure in $\bar{K}^{0} \Lambda_{c}^{+}$ consistent with a charged $\Xi_c(2930)^{+}$, and updated measurement of $\bar{B}^0\rightarrow\bar{K}^0 \Lambda_c^+ \bar{\Lambda}_c^-$ at Belle 査読

    The Belle collaboration, K, Hayasaka は

    The European Physical Journal C   78 ( 11 )   928-1 - 928-10   2018年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1140/epjc/s10052-018-6425-5

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  • Measurement of ηc (1S), ηc (2S), and nonresonant η′π+π- production via two-photon collisions 査読

    Q. N. Xu, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bondar, A. Bozek, M. Bračko, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, T. Czank, N. Dash, S. Di Carlo, Z. DoleŽal, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, P. Goldenzweig, Y. Guan, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, I. Jaegle, H. B. Jeon, Y. Jin, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, R. Kulasiri, Y. J. Kwon, I. S. Lee, S. C. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, H. K. Moon, T. Mori

    Physical Review D   98 ( 7 )   072001-1 - 072001-17   2018年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We report the measurement of γγ→ηc(1S),ηc(2S)→η′π+π- with η′ decays to γρ and ηπ+π- using 941 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The ηc(1S) mass and width are measured to be M=[2984.6±0.7 (stat)±2.2 (syst)±0.3 (model)] MeV/c2 and Γ=[30.8-2.2+2.3 (stat)±2.5 (syst)±1.4 (model)] MeV, respectively. First observation of ηc(2S)→η′π+π- with a significance of 5.5σ including systematic error is obtained, and the ηc(2S) mass is measured to be M=[3635.1±3.7 (stat)±2.9 (syst)±0.4 (model)] MeV/c2. The products of the two-photon decay width and branching fraction (B) of decays to η′π+π- are determined to be ΓγγΓγγB=[65.4±2.6 (stat)±7.8 (syst)] eV for ηc(1S) and [5.6-1.1+1.2 (stat)±1.1 (syst)] eV for ηc(2S). The cross sections for γγ→η′π+π- and η′f2(1270) are measured for the first time.

    DOI: 10.1103/PhysRevD.98.072001

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  • Search for the lepton-flavor-violating decay B <sup>0</sup> → K <sup>*0</sup> μ <sup>±</sup> e <sup>∓</sup> 査読

    S. Sandilya, K. Trabelsi, A. J. Schwartz, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, P. Behera, C. Beleño, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, L. Cao, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, J. Dingfelder, Z. DoleŽal, T. V. Dong, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, B. Golob, D. Greenwald, Y. Guan, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, S. Hirose, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri

    Physical Review D   98 ( 7 )   071101-1 - 071101-8   2018年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We have searched for the lepton-flavor-violating decay B0→K∗0μ±e using a data sample of 711 fb-1 that contains 772×106 BB̄ pairs. The data were collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. No signals were observed, and we set 90% confidence level upper limits on the branching fractions of B(B0→K∗0μ+e-)<1.2×10-7, B(B0→K∗0μ-e+)<1.6×10-7, and, for both decays combined, B(B0→K∗0μ±e)<1.8×10-7. These are the most stringent limits on these decays to date.

    DOI: 10.1103/PhysRevD.98.071101

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  • Observation of an Excited Ω- Baryon 査読

    J. Yelton, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, C. Beleño, M. Berger, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, T. Czank, N. Dash, S. Di Carlo, Z. DoleŽal, T. V. Dong, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, D. Greenwald, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, S. Hirose, W. S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, G. Karyan, Y. Kato, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kumar, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev

    Physical Review Letters   121 ( 5 )   052003-1 - 052003-7   2018年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. Using data recorded with the Belle detector, we observe a new excited hyperon, an Ω∗- candidate decaying into Ξ0K- and Ξ-KS0 with a mass of 2012.4±0.7(stat)±0.6(syst) MeV/c2 and a width of Γ=6.4-2.0+2.5(stat)±1.6(syst) MeV. The Ω∗- is seen primarily in (1S), (2S), and (3S) decays.

    DOI: 10.1103/PhysRevLett.121.052003

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  • Inclusive study of bottomonium production in association with an η meson in e<sup>+</sup>e<sup>-</sup> annihilations near Υ(5 S) : Belle Collaboration 査読

    U. Tamponi, E. Guido, R. Mussa, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, D. Cinabro, S. Cunliffe, T. Czank, N. Dash, S. Di Carlo, Z. Doležal, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, P. Goldenzweig, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, I. Jaegle, H. B. Jeon, Y. Jin, K. K. Joo, T. Julius, K. H. Kang, T. Kawasaki, H. Kichimi, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, R. Kulasiri, Y. J. Kwon, I. S. Lee, S. C. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, T. Mori

    European Physical Journal C   78 ( 8 )   633-1 - 633-10   2018年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018, The Author(s). We study bottomonium production in association with an η meson in e+e- annihilations near the Υ(5 S) , at a centre-of-mass energy of s=10.866 GeV. The results are based on the 121.4 fb- 1 data sample collected by the Belle experiment at the asymmetric-energy KEKB collider. Only the η meson is reconstructed and the missing-mass spectrum of η candidates is investigated. We observe the e+e-→ ηΥJ(1 D) process and find evidence for the e+e-→ ηΥ(2 S) process, while no significant signals of Υ(1 S) , hb(1 P) , nor hb(2 P) are found. Cross sections for the studied processes are reported.

    DOI: 10.1140/epjc/s10052-018-6086-4

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  • Search for B- →μ- ν μ Decays at the Belle Experiment 査読

    A. Sibidanov, K. E. Varvell, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, T. Czank, N. Dash, S. Di Carlo, Z. DoleŽal, Z. Drásal, D. Dutta, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, P. Goldenzweig, D. Greenwald, Y. Guan, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, S. Hirose, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, K. K. Joo, T. Julius, J. Kahn, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda

    Physical Review Letters   121 ( 3 )   031801-1 - 031801-8   2018年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We report the results of a search for the rare, purely leptonic decay B-→μ-ν μ performed with a 711 fb-1 data sample that contains 772×106 BB pairs, collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The signal events are selected based on the presence of a high momentum muon and the topology of the rest of the event showing properties of a generic B-meson decay, as well as the missing energy and momentum being consistent with the hypothesis of a neutrino from the signal decay. We find a 2.4 standard deviation excess above background including systematic uncertainties, which corresponds to a branching fraction of B(B-→μ-νμ)=(6.46±2.22±1.60)×10-7 or a frequentist 90% confidence level interval on the B-→μ-ν μ branching fraction of [2.9,10.7]×10-7.

    DOI: 10.1103/PhysRevLett.121.031801

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  • Measurement of the branching fraction of B →d (∗)πν at Belle using hadronic tagging in fully reconstructed events 査読

    A. Vossen, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, I. Badhrees, V. Bansal, C. Beleño, B. Bhuyan, T. Bilka, J. Biswal, A. Bondar, A. Bozek, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. DoleŽal, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, P. Goldenzweig, E. Guido, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, M. T. Hedges, S. Hirose, W. S. Hou, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, S. Jia, Y. Jin, T. Julius, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, T. Kumita, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, M. Masuda, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, M. Nayak, M. Niiyama, S. Nishida, H. Ono, P. Pakhlov, G. Pakhlova

    Physical Review D   98 ( 1 )   012005-1 - 012005-9   2018年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We report a measurement of the branching fractions of the decays B→D(∗)πν. The analysis uses 772×106 BB. pairs produced in e+e-→(4S) data recorded by the Belle experiment at the KEKB asymmetric-energy e+e- collider. The tagging B meson in the decay is fully reconstructed in a hadronic decay mode. On the signal side, we reconstruct the decay B→D(∗)πν(=e,μ). The measured branching fractions are B(B+→D-π++ν)=[4.55±0.27 (stat.)±0.39 (syst.)]×10-3, B(B0→D.0π-+ν)=[4.05±0.36 (stat.)±0.41 (syst.)]×10-3, B(B+→D∗-π++ν)=[6.03±0.43 (stat.)±0.38 (syst.)]×10-3, and B(B0→D.∗0π-+ν)=[6.46±0.53 (stat.)±0.52 (syst.)]×10-3. These are in good agreement with the current world-average values.

    DOI: 10.1103/PhysRevD.98.012005

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  • Search for ϒ(1S,2S)→Zc+Zc(′)− and e+e−→Zc+Zc(′)− at s=10.52 , 10.58, and 10.867 GeV 査読

    S. Jia, C. P. Shen, C. Z. Yuan, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, V. Bansal, P. Behera, C. Beleño, B. Bhuyan, T. Bilka, J. Biswal, A. Bozek, M. Bračko, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. DoleŽal, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, S. Hirose, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, T. Julius, G. Karyan, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, T. Kumita, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, J. MacNaughton, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, H. Miyata

    Physical Review D   97 ( 11 )   112004-1 - 112004-16   2018年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 American Physical Society. The first search for double charged charmoniumlike state production in Ï?(1S) and Ï?(2S) decays and in e+e- annihilation at s=10.52, 10.58, and 10.867 GeV is conducted using data collected with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant signals are observed in any of the studied modes, and the 90% credibility level upper limits on their product branching fractions in Ï?(1S) and Ï?(2S) decays [B(Ï?(1S,2S)→Zc+Zc(′)-)×B(Zc+→π++cc) (cc=J/ψ, χc1(1P), ψ(2S))] and the product of Born cross section and branching fraction for e+e-→Zc+Zc(′)- (σ(e+e-→Zc+Zc(′)-)×B(Zc+→π++cc)) at s=10.52, 10.58, and 10.867 GeV are determined. Here, Zc refers to the Zc(3900) and Zc(4200) observed in the πJ/ψ final state, the Zc1(4050) and Zc2(4250) in the πχc1(1P) final state, and the Zc(4050) and Zc(4430) in the πψ(2S) final state.

    DOI: 10.1103/PhysRevD.97.112004

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  • Measurement of time-dependent CP asymmetries in B0 → KS0 ηγ decays 査読

    H. Nakano, A. Ishikawa, K. Sumisawa, H. Yamamoto, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, V. Bansal, P. Behera, C. Beleño, B. Bhuyan, T. Bilka, J. Biswal, A. Bozek, M. Bračko, D. Červenkov, V. Chekelian, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. DoleŽal, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, Y. Guan, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, S. Hirose, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, T. Julius, A. B. Kaliyar, G. Karyan, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, T. Kumita, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. Li, Y. B. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, J. Macnaughton, M. Masuda, T. Matsuda

    Physical Review D   97 ( 9 )   092003-1 - 092003-10   2018年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We report a measurement of time-dependent CP violation parameters in B0→KS0ηγ decays. The study is based on a data sample, containing 772×106BB pairs, that was collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the CP violation parameters of S=-1.32±0.77(stat)±0.36(syst) and A=-0.48±0.41(stat)±0.07(syst) for the invariant mass of the KS0η system up to 2.1 GeV/c2.

    DOI: 10.1103/PhysRevD.97.092003

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  • Erratum: Search for B →hν ν decays with semileptonic tagging at Belle (Physical Review D (2017) (R) 96 (091101) DOI: 10.1103/PhysRevD.96.091101) 査読

    Grygier J, Goldenzweig P, Heck M, Adachi I, Aihara H, Al Said S, Asner D.M, Aushev T, Ayad R, Aziz T, Babu V, Badhrees I, Bahinipati S, Bakich A.M, Bansal V, Barberio E, Behera P, Bhuyan B, Biswal J, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bra?ko M, Browder T.E, ?ervenkov D, Chang P, Chekelian V, Chen A, Cheon B.G, Chilikin K, Chistov R, Cho K, Choi Y, Cinabro D, Dash N, Di Carlo S, Dole?al Z, Dr{\'a}sal Z, Dutta D, Eidelman S, Farhat H, Fast J.E, Ferber T, Fulsom B.G, Gaur V, Gabyshev N, Garmash A, Gelb M, Gillard R, Golob B, Grzymkowska O, Guido E, Haba J, Hara T, Hayasaka K, Hayashii H, Hedges M.T, Hsu C.-L, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki Y, Jacobs W.W, Jaegle I, Jeon H.B, Jin Y, Joffe D, Joo K.K, Julius T, Kahn J, Kaliyar A.B, Kang K.H, Karyan G, Katrenko P, Kawasaki T, Keck T, Kichimi H, Kiesling C, Kim D.Y, Kim H.J, Kim J.B, Kim K.T, Kim M.J, Kim S.H, Kinoshita K, Kody? P, Korpar S, Kotchetkov D, Kri?an P, Krokovny P, Kuhr T, Kulasiri R, Kumita T, Kuzmin A, Kwon Y.-J, Lange J.S, Li C.H, Li L, Li Y, Li Gioi L, Libby J, Liventsev D, Lubej M, Luo T, Masuda M, Matsuda T, Matvienko D, Metzner F, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohanty G.B, Moon H.K, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Nath K.J, Natkaniec Z, Nayak M, Nisar N.K, Nishida S, Ogawa S, Okuno S, Ono H, Onuki Y, Pakhlova G, Pal B, Park C.-S, Park C.W, Park H, Paul S, Pedlar T.K, Pes{\'a}ntez L, Piilonen L.E, Prim M, Pulvermacher C, Ritter M, Rostomyan A, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schl{\"u}ter T, Schneider O, Schnell G, Schwanda C, Schwartz A.J, Seino Y, Senyo K, Seong I.S, Sevior M.E, Shebalin V, Shen C.P, Shibata T.-A, Shiu J.-G, Shwartz B, Simon F, Solovieva E, Stari? M, Strube J.F, Sumiyoshi T, Takizawa M, Tamponi U, Tenchini F, Trabelsi K, Tsuboyama T, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Ushiroda Y, Van Hulse C, Varner G, Vorobyev V, Vossen A, Waheed E, Wang B, Wang C.H, Wang M.-Z, Wang P, Watanabe M, Watanabe Y, Wehle S, Williams K.M, Won E, Yamamoto H, Yamashita Y, Ye H, Yook Y, Yuan C.Z, Yusa Y, Zhang Z.P, Zhilich V, Zhukova V, Zhulanov V, Ziegler M, Zupanc A

    Physical Review D   97 ( 9 )   2018年5月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.97.099902

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  • Production cross sections of hyperons and charmed baryons from e+e- annihilation near s =10.52 GeV 査読

    M. Niiyama, M. Sumihama, T. Nakano, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, M. C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. DoleŽal, Z. Drásal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, Y. Jin, D. Joffe, K. K. Joo, T. Julius, G. Karyan, Y. Kato, P. Katrenko, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, D. Kotchetkov, P. KriŽan, P. Krokovny, R. Kulasiri, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, H. K. Moon, T. Mori

    Physical Review D   97 ( 7 )   072005   2018年4月

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    掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We measure the inclusive production cross sections of hyperons and charmed baryons from e+e- annihilation using a 800 fb-1 data sample taken near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The feed-down contributions from heavy particles are subtracted using our data, and the direct production cross sections are presented for the first time. The production cross sections divided by the number of spin states for S=-1 hyperons follow an exponential function with a single slope parameter except for the Σ(1385)+ resonance. Suppression for Σ(1385)+ and Ξ(1530)0 hyperons is observed. Among the production cross sections of charmed baryons, a factor of 3 difference for Λc+ states over Σc states is observed. This observation suggests a diquark structure for these baryons.

    DOI: 10.1103/PhysRevD.97.072005

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  • Observation of Ξ <inf>c</inf>(2930) <sup>0</sup> and updated measurement of <sup>B-</sup>→<sup>K-</sup>Λc+Λ¯c- at Belle: Belle Collaboration 査読

    Y. B. Li, C. P. Shen, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, Y. Ban, V. Bansal, P. Behera, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. Doležal, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, T. Julius, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, R. Kulasiri, T. Kumita, A. Kuzmin, Y. J. Kwon, I. S. Lee, S. C. Lee, L. K. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, J. MacNaughton, M. Masuda, T. Matsuda, M. Merola

    European Physical Journal C   78 ( 3 )   252-1 - 252-8   2018年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018, The Author(s). We report the first observation of the Ξ c(2930) 0 charmed-strange baryon with a significance greater than 5σ. The Ξ c(2930) 0 is found in its decay to K-Λc+ in B-→K-Λc+Λ¯c- decays. The measured mass and width are [2928.9±3.0(stat.)-12.0+0.9(syst.)] MeV/c2 and [19.5±8.4(stat.)-7.9+5.9(syst.)] MeV, respectively, and the product branching fraction is B(B-→Ξc(2930)0Λ¯c-)B(Ξc(2930)0→K-Λc+)=[1.73±0.45(stat.)±0.21(syst.)]×10-4. We also measure B(B-→K-Λc+Λ¯c-)=[4.80±0.43(stat.)±0.60(syst.)]×10-4 with improved precision, and search for the charmonium-like state Y(4660) and its spin partner, Yη, in the Λc+Λ¯c- invariant mass spectrum. No clear signals of the Y(4660) nor its spin partner are observed and the 90% credibility level (C.L.) upper limits on their production rates are determined. These measurements are obtained from a sample of (772 ± 11) × 10 6BB¯ pairs collected at the Υ (4 S) resonance by the Belle detector at the KEKB asymmetric energy electron–positron collider.

    DOI: 10.1140/epjc/s10052-018-5720-5

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  • Study of KS0 pair production in single-tag two-photon collisions 査読

    M. Masuda, S. Uehara, Y. Watanabe, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, V. Bansal, P. Behera, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, T. Czank, N. Dash, S. Di Carlo, Z. DoleŽal, Z. Drásal, D. Dutta, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, Y. Jin, K. K. Joo, T. Julius, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, P. Kodyš, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, R. Kulasiri, A. Kuzmin, Y. J. Kwon, I. S. Lee, S. C. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata

    Physical Review D   97 ( 5 )   052003-1 - 052003-20   2018年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. We report a measurement of the cross section for KS0 pair production in single-tag two-photon collisions, γ∗γ→KS0KS0, for Q2 up to 30 GeV2, where Q2 is the negative of the invariant mass squared of the tagged photon. The measurement covers the kinematic range 1.0 GeV<W<2.6 GeV and |cosθ∗|<1.0 for the total energy and kaon scattering angle, respectively, in the γ∗γ center-of-mass system. These results are based on a data sample of 759 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. For the first time, the transition form factor of the f2′(1525) meson is measured separately for the helicity-0, -1, and -2 components and also compared with theoretical calculations. We have derived the cross section for the process for W<2.6 GeV from 121 signal candidate events. Finally, the γ∗γ partial decay widths of the χc0 and χc2 mesons are measured as a function of Q2 based on 10 candidate events in total.

    DOI: 10.1103/PhysRevD.97.052003

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  • Observation of excited Ωc charmed baryons in e+e- collisions 査読

    J. Yelton, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, T. Aziz, V. Babu, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, T. Czank, N. Dash, S. Di Carlo, Z. DoleŽal, D. Dutta, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, B. Golob, D. Greenwald, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, Y. Jin, T. Julius, K. H. Kang, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, D. Y. Kim, H. J. Kim, J. B. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. Li, L. Li Gioi, D. Liventsev, M. Lubej, T. Luo, M. Masuda, D. Matvienko, M. Merola

    Physical Review D   97 ( 5 )   051102-1 - 051102-6   2018年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Using the entire Belle data sample of 980 fb-1 of e+e- collisions, we present the results of a study of excited Ωc charmed baryons in the decay mode Ξc+K-. We show confirmation of four of the five narrow states reported by the LHCb Collaboration: the Ωc(3000), Ωc(3050), Ωc(3066), and Ωc(3090).

    DOI: 10.1103/PhysRevD.97.051102

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  • Measurement of the τ Michel parameters η and ξκ in the radiative leptonic decay τ <sup>-</sup> → l <sup>-</sup> ν <inf>τ</inf> ν <inf>l</inf> γ 査読

    N. Shimizu, H. Aihara, D. Epifanov, I. Adachi, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansa, E. Barberio, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, T. Czank, N. Dash, S. Di Carlo, Z. Doležal, D. Dutta, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, P. Goldenzweig, D. Greenwald, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, S. Hirose, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, T. Julius, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, R. Kulasiri, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Masuda, M. Merola, K. Miyabayashi, H. Miyata, G. B. Mohanty, H. K. Moon, T. Mori, R. Mussa

    Progress of Theoretical and Experimental Physics   2018 ( 2 )   2018年2月

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    掲載種別:研究論文(学術雑誌)  

    © The Author(s) 2018. We present a measurement of the Michel parameters of the τ lepton, η and ξκ, in the radiative leptonic decay τ - → l - ν τ ν l γ using 711 fb -1 of collision data collected with the Belle detector at the KEKB e + e - collider. The Michel parameters are measured in an unbinned maximum likelihood fit to the kinematic distribution of e + e - → τ + τ - → (π + π 0 ν τ )(l - ν τ ν l γ)(l = e or μ The measured values of the Michel parameters are η = -1.3 ± 1.5 ± 0.8 and ξκ = 0.5 ± 0.4 ± 0.2, where the first error is statistical and the second is systematic. This is the first measurement of these parameters. These results are consistent with the Standard Model predictions within their uncertainties, and constrain the coupling constants of the generalized weak interaction.

    DOI: 10.1093/ptep/pty003

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  • Measurement of branching fractions of hadronic decays of the Ω c 0 baryon 査読

    J. Yelton, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, T. Aziz, V. Babu, A. M. Bakich, V. Bansal, P. Behera, M. Berger, V. Bhardwaj, J. Biswal, A. Bobrov, A. Bondar, A. BozeK, M. Bračko, T. E. Browder, D. Servenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, T. CzanK, N. Dash, S. Di Carlo, Z. Doleal, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, D. Greenwald, Y. Guan, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, Y. Jin, D. Joffe, T. Julius, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Krian, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, T. Kumita, A. Kuzmin, Y. J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej

    Physical Review D   97 ( 3 )   032001-1 - 032001-8   2018年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Using a data sample of 980 fb-1 of e+e- annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we report the results of a study of the decays of the Ωc0 charmed baryon into hadronic final states. We report the most precise measurements to date of the relative branching fractions of the Ωc0 into Ω-π+π0, Ω-π+π-π+, Ξ-K-π+π+, and Ξ0K-π+, as well as the first measurements of the branching fractions of the Ωc0 into Ξ-K̄0π+, Ξ0K̄0, and ΛK̄0K̄0, all with respect to the Ω-π+ decay. In addition, we investigate the resonant substructure of these modes. Finally, we present a limit on the branching fraction for the decay Ωc0→Σ+K-K-π+.

    DOI: 10.1103/PhysRevD.97.032001

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  • Search for CP violation in the D+ →π+π0 decay at Belle 査読

    V. Babu, K. Trabelsi, G. B. Mohanty, T. Aziz, D. Greenwald, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, R. Ayad, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, P. Behera, M. Berger, V. Bhardwaj, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, S. Choudhury, D. Cinabro, N. Dash, S. Di Carlo, Z. DoleŽal, Z. Drásal, D. Dutta, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, P. Goldenzweig, B. Golob, Y. Guan, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, T. Horiguchi, W. S. Hou, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, J. H. Kang, K. H. Kang, G. Karyan, P. Katrenko, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, A. Kuzmin, Y. J. Kwon, J. S. Lange, L. K. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda

    Physical Review D   97 ( 1 )   011101-1 - 011101-8   2018年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We search for CP violation in the charged charm meson decay D+→π+π0, based on a data sample corresponding to an integrated luminosity of 921 fb-1 collected by the Belle experiment at the KEKB e+e- asymmetric-energy collider. The measured CP-violating asymmetry is [+2.31±1.24(stat)±0.23(syst)]%, which is consistent with the standard model prediction and has a significantly improved precision compared to previous results.

    DOI: 10.1103/PhysRevD.97.011101

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  • Measurements of the absolute branching fractions of B <sup>+</sup> → X <inf>cc̄</inf> K <sup>+</sup> and B <sup>+</sup> → D̄ <sup>(*)0</sup> π <sup>+</sup> at Belle 査読

    Y. Kato, T. Iijima, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, P. Chang, R. Cheaib, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, T. Czank, N. Dash, S. Di Carlo, Z. DoleŽal, Z. Drásal, D. Dutta, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, P. Goldenzweig, D. Greenwald, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, S. Hirose, W. S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, J. B. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda

    Physical Review D   97 ( 1 )   012005-1 - 012005-10   2018年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We present the measurement of the absolute branching fractions of B+→Xcc̄K+ and B+→D̄(∗)0π+ decays, using a data sample of 772×106 BB̄ pairs collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. Here, Xcc̄ denotes ηc, J/ψ, χc0, χc1, ηc(2S), ψ(2S), ψ(3770), X(3872), and X(3915). We do not observe significant signals for X(3872) or X(3915) and set the 90% confidence level upper limits at B(B+→X(3872)K+)<2.6×10-4 and B(B+→X(3915)K+)<2.8×10-4. These represent the most stringent upper limit for B(B+→X(3872)K+) to date and the first limit for B(B+→X(3915)K+). The measured branching fractions for ηc and ηc(2S) are the most precise to date, B(B+→ηcK+)=(12.0±0.8±0.7)×10-4 and B(B+→ηc(2S)K+)=(4.8±1.1±0.3)×10-4, where the first and second uncertainties are statistical and systematic, respectively.

    DOI: 10.1103/PhysRevD.97.012005

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  • Measurement of the τ lepton polarization and R(D*) in the decay B¯→D*τ−ν¯τ with one-prong hadronic τ decays at Belle 査読

    S. Hirose, T. Iijima, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, M. C. Chang, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, T. Czank, N. Dash, S. Di Carlo, Z. DoleŽal, D. Dutta, S. Eidelman, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, B. Golob, Y. Guan, E. Guido, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, T. Higuchi, W. S. Hou, C. L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, I. Jaegle, H. B. Jeon, Y. Jin, T. Julius, K. H. Kang, G. Karyan, T. Kawasaki, D. Y. Kim, J. B. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. KriŽan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Matsuda, K. Miyabayashi

    Physical Review D   97 ( 1 )   012004-1 - 012004-17   2018年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. With the full data sample of 772×106 BB̄ pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay B̄→D∗τ-ν̄τ is studied with the hadronic τ decays τ-→π-ντ and τ-→ρ-ντ. The τ polarization Pτ(D∗) in two-body hadronic τ decays is measured, as well as the ratio of the branching fractions R(D∗)=B(B̄→D∗τ-ν̄τ)/B(B̄→D∗-ν̄), where - denotes an electron or a muon. Our results, Pτ(D∗)=-0.38±0.51(stat)-0.16+0.21(syst) and R(D∗)=0.270±0.035(stat)-0.025+0.028(syst), are consistent with the theoretical predictions of the standard model. The polarization values of Pτ(D∗)>+0.5 are excluded at the 90% confidence level.

    DOI: 10.1103/PhysRevD.97.012004

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  • Angular analysis of the e <sup>+</sup> e <sup>-</sup> → D <sup>(*)±</sup> D <sup>*∓</sup> process near the open charm threshold using initial-state radiation 査読

    V. Zhukova, G. Pakhlova, P. Pakhlov, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, P. Behera, B. Bhuyan, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, T. Czank, N. Dash, S. Di Carlo, Z. DoleŽal, Z. Drásal, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, A. Garmash, R. Gillard, P. Goldenzweig, O. Grzymkowska, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, M. T. Hedges, W. S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, T. Julius, K. H. Kang, G. Karyan, C. Kiesling, D. Y. Kim, K. T. Kim, S. H. Kim, S. Korpar, D. Kotchetkov, P. KriŽan, P. Krokovny, R. Kulasiri, Y. J. Kwon, J. S. Lange, L. Li, L. Li Gioi, D. Liventsev, T. Luo, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, T. Mori, M. Nakao, T. Nanut, K. J. Nath, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. L. Olsen, H. Ono, B. Pal, C. S. Park

    Physical Review D   97 ( 1 )   012002-1 - 012002-21   2018年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2018 authors. Published by the American Physical Society. We report a new measurement of the exclusive e+e-→D(∗)±D∗ cross sections as a function of the center-of-mass energy from the D(∗)±D∗ threshold through s=6.0 GeV, using the initial-state radiation technique. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 951 fb-1. The accuracy of the cross section measurement is increased by a factor of 2 over the first Belle study. We perform the first angular analysis of the e+e-→D∗±D∗ process and decompose this exclusive cross section into three components corresponding to the D∗ helicities.

    DOI: 10.1103/PhysRevD.97.012002

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  • Averages of b-hadron, c-hadron, and τ -lepton properties as of summer 2016 査読

    Y. Amhis, Sw Banerjee, E. Ben-Haim, F. Bernlochner, A. Bozek, C. Bozzi, M. Chrząszcz, J. Dingfelder, S. Duell, M. Gersabeck, T. Gershon, D. Gerstel, P. Goldenzweig, R. Harr, K. Hayasaka, H. Hayashii, M. Kenzie, T. Kuhr, O. Leroy, A. Lusiani, X. R. Lyu, K. Miyabayashi, P. Naik, T. Nanut, A. Oyanguren Campos, M. Patel, D. Pedrini, M. Petrič, M. Rama, M. Roney, M. Rotondo, O. Schneider, C. Schwanda, A. J. Schwartz, J. Serrano, B. Shwartz, R. Tesarek, D. Tonelli, K. Trabelsi, P. Urquijo, R. Van Kooten, J. Yelton, A. Zupanc

    European Physical Journal C   77 ( 12 )   2017年12月

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    掲載種別:研究論文(学術雑誌)  

    © 2017, The Author(s). This article reports world averages of measurements of b-hadron, c-hadron, and τ-lepton properties obtained by the Heavy Flavor Averaging Group using results available through summer 2016. For the averaging, common input parameters used in the various analyses are adjusted (rescaled) to common values, and known correlations are taken into account. The averages include branching fractions, lifetimes, neutral meson mixing parameters, CP violation parameters, parameters of semileptonic decays, and Cabbibo–Kobayashi–Maskawa matrix elements.

    DOI: 10.1140/epjc/s10052-017-5058-4

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  • Search for light tetraquark states in Upsilon(1S) and Upsilon(2S) decays 査読

    S. Jia, C. P. Shen, C. Z. Yuan, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, P. Behera, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, M. -C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, T. Czank, N. Dash, S. Di Carlo, Z. Dolezal, D. Dutta, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, O. Grzymkowska, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, G. Karyan, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, R. Kroeger, P. Krokovny, R. Kulasiri, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, H. K. Moon, T. Mori, R. Mussa, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, H. Ono, Y. Onuki, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, C. W. Park, H. Park, S. Paul, I. Pavelkin, R. Pestotnik, L. E. Piilonen, M. Ritter, A. Rostomyan, G. Russo, Y. Sakai, M. Salehi, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, T. -A. Shibata, N. Shimizu, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, E. Solovieva, M. Staric, J. Stypula, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, A. Vossen, B. Wang, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, E. Widmann, E. Won, Y. Yamashita, H. Ye, Y. Yusa, S. Zakharov, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   96 ( 11 )   112002-1 - 112002-14   2017年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We search for the J(PC) = 0(--) and 1(+-) light tetraquark states with masses up to 2.46 GeV/c(2) in gamma(1S) and gamma(2S) decays with data samples of (102 +/- 2) million and (158 +/- 4) million events, respectively, collected with the Belle detector. No significant signals are observed in any of the studied production modes, and 90% credibility level (C. L.) upper limits on their branching fractions in Upsilon(1S) and Upsilon(2S) decays are obtained. The inclusive branching fractions of the Upsilon(1S) and Upsilon(2S) decays into final states with f(1)(1285) are measured to be B(Upsilon(1S) -&gt; f(1)(1285) + anything) = (46 +/- 28(stat) +/- 13(syst)) x 10(-4) and B(Upsilon(2S) -&gt; f(1)(1285) + anything) = (22 +/- 15(stat) +/- 6.3(syst)) x 10(-4). The measured chi(b2) -&gt; J/Psi + anything branching fraction is measured to be (1.50 +/- 0.34(stat) +/- 0.22(syst)) x 10(-3), and 90% C. L. upper limits for the chi(b0;b1) -&gt; J/Psi + anything branching fractions are found to be 2.3 x 10(-3) and 1.1 x 10(-3), respectively. For B(chi(b1) -&gt; omega + anything), the branching fraction is measured to be (4.9 +/- 1.3(stat) +/- 0.6(syst) x 10(-2). All results reported here are the first measurements for these modes.

    DOI: 10.1103/PhysRevD.96.112002

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  • Evidence for Isospin Violation and Measurement of CP Asymmetries in B -&gt; K*(892)gamma 査読

    T. Horiguchi, A. Ishikawa, H. Yamamoto, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, D. Cinabro, T. Czank, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, R. Gillard, P. Goldenzweig, B. Golob, Y. Guan, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, T. Higuchi, S. Hirose, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, T. Kawasaki, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, C. H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, H. Ono, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, C. -S. Park, H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, K. Prasanth, C. Pulvermacher, J. Rauch, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, I. S. Seong, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, A. Sokolov, E. Solovieva, M. Staric, J. F. Strube, K. Sumisawa, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, C. Van Hulse, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, S. Watanuki, T. Weber, E. Widmann, E. Won, Y. Yamashita, H. Ye, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   119 ( 19 )   191802-1 - 191802-8   2017年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first evidence for isospin violation in B -&gt; K*gamma and the first measurement of the difference of CP asymmetries between B+-&gt;.K*(+)gamma and B-0 -&gt; K-*0 gamma. This analysis is based on the data sample containing 772 x 10(6)BB pairs that was collected with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We find evidence for the isospin violation with a significance of 3.1 sigma, Delta(0+) = [+6.2 +/- 1.5(stat) +/- 0.6(syst) +/- 1.2(f (+-)/f(00))] %, where the third uncertainty is due to the uncertainty on the fraction of B+B- to (BB0)-B-0 production in gamma(4S) decays. The measured value is consistent with predictions of the standard model. The result for the difference of CP asymmetries is Delta A(CP) = [+2.4 +/- 2.8(stat) +/- 0.5(syst)] %, consistent with zero. The measured branching fractions and CP asymmetries for charged and neutral B meson decays are the most precise to date. We also calculate the ratio of branching fractions of B-0 -&gt; K-*0 gamma to B-s(0) -&gt; phi gamma.

    DOI: 10.1103/PhysRevLett.119.191802

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  • Search for B -&gt; h nu(nu)over-bar decays with semileptonic tagging at Belle 査読

    J. Grygier, P. Goldenzweig, M. Heck, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, R. Gillard, B. Golob, O. Grzymkowska, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, T. Julius, J. Kahn, A. B. Kaliyar, K. H. Kang, G. Karyan, P. Katrenko, T. Kawasaki, T. Keck, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, F. Metzner, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, H. Ono, Y. Onuki, G. Pakhlova, B. Pal, C. -S. Park, C. W. Park, H. Park, S. Paul, T. K. Pedlar, L. Pesantez, L. E. Piilonen, M. Prim, C. Pulvermacher, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, I. S. Seong, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, E. Solovieva, M. Staric, J. F. Strube, T. Sumiyoshi, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, T. Tsuboyama, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, C. Van Hulse, G. Varner, V. Vorobyev, A. Vossen, E. Waheed, B. Wang, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, S. Wehle, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, H. Ye, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, M. Ziegler, A. Zupanc

    PHYSICAL REVIEW D   96 ( 9 )   091101-1 - 091101-7   2017年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present the results of a search for the rare decays B -&gt; h nu(nu) over bar, where h stands for K+, K-S(0), K*(+); K*(0); pi(+); pi(0), rho(+) and rho(0). The results are obtained with 772 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB e(+)e(-) collider. We reconstruct one B meson in a semileptonic decay and require a single h meson but nothing else on the signal side. We observe no significant signal and set upper limits on the branching fractions. The limits set on the B-0 -&gt; K-S(0)nu(nu) over bar, B-0 -&gt; K*(0)nu(nu) over bar, B+ -&gt; pi(+)nu(nu) over bar, B-0 -&gt; pi(0)nu(nu) over bar, B+ -&gt; rho(+)nu(nu) over bar, and B-0 -&gt; rho(0)nu(nu) over bar channels are the world's most stringent.

    DOI: 10.1103/PhysRevD.96.091101

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  • Search for CP Violation and Measurement of the Branching Fraction in the Decay D-0 -&gt; (KSKS0)-K-0 査読

    N. Dash, S. Bahinipati, V. Bhardwaj, K. Trabelsi, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, F. Breibeck, T. E. Browder, D. Cervenkov, M. -C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, D. Cinabro, S. Di Carlo, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, T. Julius, J. Kahn, A. B. Kaliyar, G. Karyan, P. Katrenko, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, H. Ono, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, C. -S. Park, H. Park, S. Paul, T. K. Pedlar, L. Pesantez, R. Pestotnik, L. E. Piilonen, K. Prasanth, M. Ritter, A. Rostomyan, H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, M. Staric, J. F. Strube, J. Stypula, K. Sumisawa, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, V. Vorobyev, A. Vossen, E. Waheed, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Widmann, K. M. Williams, E. Won, Y. Yamashita, H. Ye, J. Yelton, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   119 ( 17 )   171801-1 - 171801-7   2017年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a study of the decay D-0 -&gt; (KSKS0)-K-0 using 921 fb(-1) of data collected at or near the (sic)(4S) and (sic)(5S) resonances with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. The measured time-integrated CP asymmetry is A(CP)(D-0 -&gt; (KSKS0)-K-0) = (-0.02 +/- 1.53 +/- 0.02 +/- 0.17)%, and the branching fraction is B(D-0 -&gt; (KSKS0)-K-0) = (1.321 +/- 0.023 +/- 0.036 +/- 0.044) x 10(-4), where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D-0 -&gt; K-S(0)pi(0)). These results are significantly more precise than previous measurements available for this mode. The A(CP) measurement is consistent with the standard model expectation.

    DOI: 10.1103/PhysRevLett.119.171801

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  • Measurements of the absolute branching fractions of B+ -> Xc(c)over-barK(+) and B+ -> (D)over-bar((*)0)pi(+) at Belle 査読

    Kato Y, Iijima T, Adachi I, Aihara H, Al Said S, Asner D. M, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bakich A. M, Bansal V, Barberio E, Behera P, Bhardwaj V, Bhuyan B, Biswal J, Bozek A, Bracko M, Browder T. E, Cervenkov D, Chang P, Cheaib R, Chekelian V, Chen A, Cheon B. G, Chilikin K, Cho K, Choi S. -K, Choi Y, Cinabro D, Czank T, Dash N, Di Carlo S, Dolezal Z, Drasal Z, Dutta D, Eidelman S, Epifanov D, Fast J. E, Ferber T, Fulsom B. G, Gaur V, Gabyshev N, Garmash A, Gelb M, Goldenzweig P, Greenwald D, Guido E, Haba J, Hayasaka K, Hayashii H, Hedges M. T, Hirose S, Hou W. -S, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Jacobs W. W, Jaegle I, Jeon H. B, Jin Y, Joo K. K, Julius T, Kaliyar A. B, Kang K. H, Karyan G, Kawasaki T, Kichimi H, Kiesling C, Kim D. Y, Kim J. B, Kim S. H, Kim Y. J, Kinoshita K, Kodys P, Korpar S, Kotchetkov D, Krizan P, Kroeger R, Krokovny P, Kuhr T, Kulasiri R, Kuzmin A, Kwon Y. -J, Lange J. S, Lee I. S, Li C. H, Li L, Gioi L. Li, Libby J, Liventsev D, Lubej M, Luo T, Masuda M, Matsuda T, Merola M, Miyabayashi K, Miyata H, Mizuk R, Mohanty G. B, Moon H. K, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Nath K. J, Natkaniec Z, Nayak M, Niiyama M, Nisar N. K, Nishida S, Ogawa S, Okuno S, Ono H, Pakhlov P, Pakhlova G, Pal B, Park C. -S, Park C. W, Park H, Paul S, Pedlar T. K, Pestotnik R, Piilonen L. E, Ritter M, Rostomyan A, Sakai Y, Salehi M, Sandilya S, Sato Y, Savinov V, Schneider O, Schnell G, Schwanda C, Schwartz A. J, Seino Y, Senyo K, Sevior M. E, Shebalin V, Shen C. P, Shibata T. -A, Shiu J. -G, Simon F, Sokolov A, Solovieva E, Staric M, Strube J. F, Sumihama M, Sumisawa K, Sumiyoshi T, Takizawa M, Tamponi U, Tanida K, Tenchini F, Trabelsi K, Uchida M, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Van Hulse C, Varner G, Varvell K. E, Vorobyev V, Wang C. H, Wang M. -Z, Wang P, Watanabe M, Watanuki S, Widmann E, Won E, Yamashita Y, Ye H, Yelton J, Yuan C. Z, Yusa Y, Zhang Z. P, Zhilich V, Zhukova V, Zhulanov V, Zupanc A

    PHYSICAL REVIEW D   97 ( 1 )   2017年9月

  • Search for Lambda(+)(c) -&gt; phi p pi(0) and branching fraction measurement of Lambda(+)(c) -&gt; K- pi(+) p pi(0) 査読

    B. Pal, A. J. Schwartz, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, M. Berger, V. Bhardwaj, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, S. Eidelman, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, P. Goldenzweig, E. Guido, T. Hara, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, K. Inami, A. Ishikawa, R. Itoh, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, G. Karyan, Y. Kato, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krokovny, T. Kuhr, R. Kulasiri, Y. -J. Kwon, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, J. MacNaughton, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, M. Nayak, M. Niiyama, S. Nishida, S. Ogawa, H. Ono, P. Pakhlov, G. Pakhlova, S. Pardi, C. -S. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, T. -A. Shibata, J. -G. Shiu, F. Simon, A. Sokolov, E. Solovieva, M. Staric, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, S. Uno, C. Van Hulse, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, C. H. Wang, M. -Z. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, S. Watanuki, E. Widmann, E. Won, Y. Yamashita, H. Ye, J. Yelton, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   96 ( 5 )   051102-1 - 051102-8   2017年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We have searched for the Cabibbo-suppressed decay Lambda(+)(c) -&gt; pi p(0) in e(+) e(-) collisions using a data sample corresponding to an integrated luminosity of 915 fb(-1). The data were collected by the Belle experiment at the KEKB e(+) e(-) asymmetric-energy collider running at or near the (4S) and (5S) resonances. No significant signal is observed, and we set an upper limit on the branching fraction of B(Lambda(+)(c) -&gt; phi p(0)) &lt; 15.3 x 10(-5) at 90% confidence level. The contribution of nonresonant Lambda(+)(c) -&gt; K+ K- p pi(0) decays is found to be consistent with zero, and the corresponding upper limit on its branching fraction is set to be B(Lambda(+)(c) -&gt;. K+ K- p pi(0))(NR) &lt; 6.3 x 10(-5) at 90% confidence level. We also search for an intermediate hidden-strangeness pentaquark decay P-s(+) -&gt; phi p. We see no evidence for this intermediate decay and set an upper limit on the product branching fraction of B(Lambda(+)(c) -&gt; P-s(+) pi(0)) x B(P-s(+) -&gt; phi p) &lt; 8.3 x 10(-5) at 90% confidence level. Finally, we measure the branching fraction for the Cabibbo-favored decay Lambda(+)(c) -&gt; K- pi(+) p pi(0); the result is B(Lambda(+)(c) -&gt; K- pi(+) p pi(0)) = (4.42 +/- 0.05(stat)+/- 0.12(syst)+/- 0.16(norm))%, which is the most precise measurement to date.

    DOI: 10.1103/PhysRevD.96.051102

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  • Study of eta and dipion transitions in gamma(4S) decays to lower bottomonia 査読

    E. Guido, R. Mussa, U. Tamponi, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, R. Gillard, P. Goldenzweig, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, G. Karyan, T. Kawasaki, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, R. Kulasiri, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, P. Lewis, C. H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, H. K. Moon, T. Mori, E. Nakano, M. Nakao, T. Nanut, J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, C. -S. Park, H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, C. Pulvermacher, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, M. Staric, J. F. Strube, K. Sumisawa, T. Sumiyoshi, M. Takizawa, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, S. Watanuki, E. Widmann, K. M. Williams, E. Won, Y. Yamashita, H. Ye, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   96 ( 5 )   052005-1 - 052005-11   2017年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We study hadronic transitions between bottomonium states using 496 fb(-1) data collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. We measure: B(gamma(4S) -&gt; pi(+)pi(-)gamma(1S)) = (8.2 +/- 0.5(stat.)+/- 0.4(syst.)) x 10(-5), B(gamma(4S) -&gt; pi(+)pi(-)gamma(2S)) = (7.9 +/- 1.0(stat.)+/- 0.4(syst.)) x 10(-5), and B(gamma(4S) -&gt; eta gamma(1S)) = (1.70 +/- 0.23(stat.) +/- 0.08(syst.)) x 10(-4). We measure the ratio of branching fractions R=B(gamma(4S) -&gt; eta gamma(1S))/B(gamma(4S) -&gt; pi(+)pi(-)gamma(1S)) = 2.07 +/- 0.30(stat.)+/- 0.11(syst.). We search for the decay gamma(1(3)D(1,2)) -&gt; eta gamma(1S), but do not find significant evidence for such a transition. We also measure the initial state radiation production cross sections of the gamma(2S,3S) resonances and we find values compatible with the expected ones. Finally, the analysis of the gamma(4S) -&gt; pi(+)pi(-)gamma(1S) events shows indications for a resonant contribution due to the f(0)(980) meson.

    DOI: 10.1103/PhysRevD.96.052005

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  • Measurement of branching fraction and direct CP asymmetry in charmless B+ -&gt; K+ K- pi(+) decays at Belle 査読

    C-L Hsu, D. Dossett, M. E. Sevior, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, E. Barberio, P. Behera, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, T. Bloomfield, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, S. Eidelman, H. Farhat, J. E. Fast, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, P. Goldenzweig, B. Golob, O. Grzymkowska, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W-S Hou, K. Inami, G. Inguglia, A. Ishikawa, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, P. Katrenko, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y-J Kwon, Y-T Lai, J. S. Lange, C. H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, H. Ono, Y. Onuki, G. Pakhlova, B. Pal, C-S Park, C. W. Park, H. Park, S. Paul, T. K. Pedlar, L. Pesantez, L. E. Piilonen, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, V. Shebalin, T-A Shibata, J-G Shiu, B. Shwartz, F. Simon, E. Solovieva, M. Staric, F. Strube, K. Sumisawa, M. Takahashi, M. Takizawa, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, K. E. Varvell, V. Vorobyev, E. Waheed, C. H. Wang, M-Z Wang, X-L Wang, M. Watanabe, Y. Watanabe, E. Widmann, K. M. Williams, E. Won, Y. Yamashita, H. Ye, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   96 ( 3 )   031101-1 - 031101-8   2017年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a study of the charmless hadronic decay of the charged B meson to the three-body final state K+K-pi(+). The results are based on a data sample that contains 772 x 10(6) B (B) over bar pairs collected at the Y (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured inclusive branching fraction and direct CP asymmetry are (5.38 +/- 0.40 +/- 0.35) x 10(-6) and -0.170 +/- 0.073 +/- 0.017, respectively, where the first uncertainties are statistical and the second are systematic. The K+K- invariant mass distribution of the signal candidates shows an excess in the region below 1.5 GeV/c(2), which is consistent with the previous studies from BABAR and LHCb. In addition, strong evidence of a large direct CP asymmetry is found in the low K+K- invariant-mass region.

    DOI: 10.1103/PhysRevD.96.031101

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  • Invariant-mass and fractional-energy dependence of inclusive production of dihadrons in e(+) e(-) annihilation at root s=10.58 GeV 査読

    R. Seidl, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S-K Choi, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, E. Guido, J. Haba, K. Hayasaka, H. Hayashii, W-S Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, G. Karyan, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, R. Kulasiri, T. Kumita, A. Kuzmin, Y-J Kwon, J. S. Lange, L. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, C. Pulvermacher, M. Ritter, A. Rostomyan, Y. Sakai, L. Santelj, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, V. Shebalin, C. P. Shen, T-A Shibata, J-G Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, M. Staric, J. F. Strube, K. Sumisawa, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, C. Van Hulse, G. Varner, V. Vorobyev, A. Vossen, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, S. Watanuki, E. Widmann, E. Won, Y. Yamashita, H. Ye, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   96 ( 3 )   032005-1 - 032005-21   2017年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The inclusive cross sections for dihadrons of charged pions and kaons (e(+)e(-) -&gt; hhX) in electron-positron annihilation are reported. They are obtained as a function of the total fractional energy and invariant mass for any di-hadron combination in the same hemisphere as defined by the thrust event-shape variable and its axis. Since same-hemisphere dihadrons can be assumed to originate predominantly from the same initial parton, di-hadron fragmentation functions are probed. These di-hadron fragmentation functions are needed as an unpolarized baseline in order to quantitatively understand related spindependent measurements in other processes and to apply them to the extraction of quark transversity distribution functions in the nucleon. The di- hadron cross sections are obtained from a 655 fb(-1) data sample collected at or near the Y (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.96.032005

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  • Measurement of the branching fraction and CP asymmetry in B-0 -&gt; pi(0)pi(0) decays, and an improved constraint on phi(2) 査読

    T. Julius, M. E. Sevior, G. B. Mohanty, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, M. Barrett, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, T. Bloomfield, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, M-C Chang, Y. Chao, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, D. Dossett, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, W-S Hou, C-L Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, Y. Jin, D. Joffe, K. K. Joo, J. Kahn, G. Karyan, P. Katrenko, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, J. F. Krohn, T. Kuhr, R. Kulasiri, A. Kuzmin, Y-J Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, T. Luo, J. MacNaughton, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, C-S Park, H. Park, L. Pesantez, R. Pestotnik, L. E. Piilonen, C. Pulvermacher, M. Ritter, H. Sahoo, Y. Sakai, M. Salehi, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, V. Shebalin, T-A Shibata, J-G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, M. Staric, T. Sumiyoshi, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, K. E. Varvell, A. Vossen, E. Waheed, C. H. Wang, M-Z Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Widmann, K. M. Williams, E. Won, Y. Yamashita, H. Ye, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   96 ( 3 )   032007-1 - 032007-8   2017年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We measure the branching fraction and CP violation asymmetry in the decay B-0 -&gt; pi(0)pi(0), using a data sample of 752 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. The obtained branching fraction and direct CP asymmetry are B(B -&gt; pi(0)pi(0)) = [1.31 +/- 0.19(stat) +/- 0.19(syst)] x 10(-6) and A(CP) = +0.14 +/- 0.36(stat) +/- 0.10(syst), respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle's earlier measurements of B-0 -&gt; pi(+)pi(-) and B-+/- -&gt; pi(+/-)pi(0) to exclude the CP-violating parameter phi(2) from the range 15.5 degrees &lt; phi(2) &lt; 75.0 degrees at 95% confidence level.

    DOI: 10.1103/PhysRevD.96.032007

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  • MC study for the lepton flavor violating tau decay into a lepton and an undetectable particle 査読

    T. Yoshinobu, Belle collaboration, K. Hayasaka

    287-288   218 - 220   2017年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier B.V.  

    We search for the charged lepton flavor violating (cLFV) two-body decay, τ→lX using data samples collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, where l is muon or electron and X is a missing particle. One of candidates for an X particle is, for example, a light Z′ boson in the Lμ−Lτ model. This decay mode has been searched for in the ARGUS experiment in 1995. No evidence of the signal has been found and they set upper limits for B(τ→lX)/B(τ→lνν) at several values of X mass. With the Belle data sample, we can perform a much more sensitive search. In this paper we report the estimation of the sensitivities and upper limits of the branching fraction for τ→μX depending on the X mass with a 1 ab−1 data sample.

    DOI: 10.1016/j.nuclphysbps.2017.03.081

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  • Observation of an alternative chi(c0)(2P) candidate in e(+)e(-)-&gt; J/psi D(D)over-bar 査読

    K. Chilikin, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, D. Besson, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Cho, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, J. Haba, T. Hara, K. Hayasaka, W. -S. Hou, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, G. Karyan, P. Katrenko, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. -J. Kwon, J. S. Lange, L. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, H. Ono, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, H. Park, S. Paul, R. Pestotnik, L. E. Piilonen, C. Pulvermacher, M. Ritter, H. Sahoo, Y. Sakai, M. Salehi, S. Sandilya, L. Santelj, T. Sanuki, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, A. Sokolov, E. Solovieva, M. Staric, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, S. Uno, Y. Usov, C. Van Hulse, G. Varner, A. Vinokurova, A. Vossen, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Widmann, E. Won, H. Yamamoto, Y. Yamashita, H. Ye, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   95 ( 11 )   112003-1 - 112003-17   2017年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We perform a full amplitude analysis of the process e(+)e(-)-&gt; J/psi D (D) over bar, where D refers to either D-0 or D+. A new charmoniumlike state X*(3860) that decays to D (D) over bar is observed with a significance of 6.5 sigma. Its mass is (3862(-32)(+26) (+40)(-13) )MeV= c(2), and its width is (201(-67) (+154)(-82) (+88)) MeV. The J(PC) = 0(++) hypothesis is favored over the 2(++) hypothesis at the level of 2.5s. The analysis is based on the 980 fb(-1) data sample collected by the Belle detector at the asymmetric-energy e(+)e(-)collider KEKB.

    DOI: 10.1103/PhysRevD.95.112003

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  • Measurement of the tau Lepton Polarization and R(D*) in the Decay (B)over-bar -&gt; D* tau(-) (v)over-bar(tau) 査読

    S. Hirose, T. Iijima, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, M. Berger, B. Bhuyan, J. Biswal, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, Y. Choi, D. Cinabro, M. Danilov, N. Dash, S. Di Carlo, J. Dingfelder, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, P. Goldenzweig, B. Golob, D. Greenwald, J. Grygier, J. Haba, K. Hara, J. Hasenbusch, K. Hayasaka, H. Hayashii, T. Higuchi, W. -S. Hou, C. -L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, Y. Jin, D. Joffe, K. K. Joo, T. Julius, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, Y. -J. Kwon, J. S. Lange, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, J. MacNaughton, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, T. Mori, R. Mussa, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, H. Ono, Y. Onuki, W. Ostrowicz, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, S. Paul, L. Pesantez, R. Pestotnik, L. E. Piilonen, K. Prasanth, M. Ritter, A. Rostomyan, M. Rozanska, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, A. Sokolov, E. Solovieva, M. Staric, J. F. Strube, K. Sumisawa, T. Sumiyoshi, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, C. Van Hulse, G. Varner, K. E. Varvell, A. Vossen, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Widmann, E. Won, Y. Yamashita, H. Ye, J. Yelton, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   118 ( 21 )   211801-1 - 211801-7   2017年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first measurement of the tau lepton polarization P-tau(D*) in the decay (B) over bar -&gt; D* tau(-) (v) over bar (tau) as well as a newmeasurement of the ratio of the branching fractions R(D*) = B((B) over bar -&gt; D* tau(-) (v) over bar (tau)) / B((B) over bar -&gt; D* l(-) (v) over bar (l)), where l(-) denotes an electron or a muon, and the tau is reconstructed in the modes tau(-) -&gt; pi(-) v(tau) and tau(-) -&gt; rho(-) v(tau). We use the full data sample of 772 x 10(6) B (B) over bar pairs recorded with the Belle detector at the (KEKB) over bar electron-positron collider. Our results, P-tau(D*) = -0.38 +/- 0.51 (stat)(-0.16)(+0.21) (syst) and R(D*) = 0.270 +/- 0.035 (stat)(- 0.025)(+0.028) (syst), are consistent with the theoretical predictions of the standard model.

    DOI: 10.1103/PhysRevLett.118.211801

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  • First measurement of T-odd moments in D-0 -&gt; K-S(0) pi + pi(-)pi(0) decays 査読

    K. Prasanth, J. Libby, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, E. Barberio, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, D. Greenwald, J. Haba, T. Hara, K. Hayasaka, M. T. Hedges, W. -S. Hou, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, L. Li Gioi, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, H. K. Moon, T. Mori, R. Mussa, K. R. Nakamura, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, H. Ono, P. Pakhlov, G. Pakhlova, B. Pal, C. -S. Park, H. Park, S. Paul, L. Pesantez, R. Pestotnik, L. E. Piilonen, C. Pulvermacher, M. Ritter, A. Rostomyan, Y. Sakai, M. Salehi, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, O. Schneider, G. Schnell, Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, R. Sinha, A. Sokolov, E. Solovieva, M. Staric, J. F. Strube, K. Sumisawa, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, C. Van Hulse, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, E. Waheed, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Widmann, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, H. Ye, J. Yelton, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   95 ( 9 )   091101-1 - 091101-8   2017年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first measurement of the T-odd moments in the decay D-0 -&gt; K-S(0) pi + pi(-)pi(0) from a data sample corresponding to an integrated luminosity of 966 fb(-1) collected by the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider. From these moments we determine the CP-violation-sensitive asymmetry a(CP)(T-odd) = [-0.28 +/- 1.38 (stat.)(-0.76)(+0.23) (syst.)] x 10(-3) , which is consistent with no CP violation. In addition, we perform a(CP)(T-odd) measurements in different regions of the D-0 -&gt; K-S(0) pi + pi(-)pi(0) phase space; these are also consistent with no CP violation.

    DOI: 10.1103/PhysRevD.95.091101

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  • Lepton-Flavor-Dependent Angular Analysis of B -&gt; K*l(+)l(-) 査読

    S. Wehle, C. Niebuhr, S. Yashchenko, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, T. Aziz, V. Babu, A. M. Bakich, V. Bansal, E. Barberio, W. Bartel, P. Behera, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, Y. Choi, D. Cinabro, N. Dash, J. Dingfelder, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, B. Golob, O. Grzymkowska, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, G. Karyan, P. Katrenko, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, L. Koch, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, K. Miyabayashi, H. Miyake, R. Mizuk, G. B. Mohanty, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, Y. Onuki, G. Pakhlova, B. Pal, C. -S. Park, C. W. Park, H. Park, S. Paul, L. Pesyntez, L. E. Piilonen, C. Pulvermacher, J. Rauch, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, T. Schluter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, O. Seon, I. S. Seong, M. E. Sevior, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, R. Sinha, E. Solovieva, M. Staric, J. F. Strube, K. Sumisawa, T. Sumiyoshi, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, T. Tsuboyama, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, S. E. Vahsen, C. Van Hulse, G. Varner, K. E. Varvell, V. Vorobyev, A. Vossen, E. Waheed, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Widmann, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, H. Ye, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, M. Ziegler, A. Zupanc

    PHYSICAL REVIEW LETTERS   118 ( 11 )   111801-1 - 111801-7   2017年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of angular observables and a test of lepton flavor universality in the B -&gt; K(+)l(+)l(-) decay, where l is either e or mu. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb(-1) containing 772 x 10(6) B (B) over bar pairs, collected at the Upsilon(4S) resonance with the Belle detector at the asymmetric-energy e(+)e(-) collider KEKB. The result is consistent with standard model (SM) expectations, where the largest discrepancy from a SM prediction is observed in the muon modes with a local significance of 2.6 sigma.

    DOI: 10.1103/PhysRevLett.118.111801

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  • Erratum to: Search for B decays to final states with the eta (c) meson (vol 06, 132, 2015) 査読

    A. Vinokurova, A. Kuzmin, S. Eidelman, A. Abdesselam, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, A. M. Bakich, V. Bansal, V. Bhardwaj, B. Bhuyan, A. Bobrov, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, V. Chekelian, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, J. Dingfelder, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, D. Joffe, T. Julius, K. H. Kang, E. Kato, C. Kiesling, D. Y. Kim, H. J. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, Y. -J. Kwon, J. S. Lange, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, G. B. Mohanty, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, C. Ng, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Steder, M. Sumihama, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, M. Uchida, T. Uglov, Y. Unno, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, M. N. Wagne, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhulanov, A. Zupanc

    JOURNAL OF HIGH ENERGY PHYSICS   ( 2 )   02(2017)088   2017年2月

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    記述言語:英語   出版者・発行元:SPRINGER  

    DOI: 10.1007/JHEP02(2017)088

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  • Search for D-0 decays to invisible final states at Belle 査読

    Y. -T. Lai, M. -Z. Wang, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, D. Cervenkov, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, B. Golob, K. Hayasaka, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, T. Kawasaki, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, D. Kotchetkov, P. Krokovny, T. Kuhr, R. Kulasiri, Y. -J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, E. Nakano, M. Nakao, H. Nakazawa, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, B. Pal, H. Park, S. Paul, T. K. Pedlar, L. E. Piilonen, C. Pulvermacher, J. Rauch, M. Ritter, H. Sahoo, Y. Sakai, S. Sandilya, Y. Sato, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, D. Semmler, K. Senyo, I. S. Seong, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, E. Solovieva, M. Staric, J. Stypula, T. Sumiyoshi, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, K. E. Varvell, V. Vorobyev, C. H. Wang, M. Watanabe, Y. Watanabe, E. Widmann, E. Won, Y. Yamashita, H. Ye, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   95 ( 1 )   011102-1 - 011102-8   2017年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the result from the first search for D-0 decays to invisible final states. The analysis is performed on a data sample of 924 fb(-1) collected at and near the gamma(4S) and gamma(5S) resonances with the Belle detector at the KEKB asymmetric-energy e(|) e(-) collider. The absolute branching fraction is determined using an inclusive D-0 sample, obtained by fully reconstructing the rest of the particle system including the other charmed particle. No significant signal yield is observed and an upper limit of 9.4 x 10(-5) is set on the branching fraction of D-0 to invisible final states at 90% confidence level.

    DOI: 10.1103/PhysRevD.95.011102

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  • Observation of D-0 -&gt; rho(0)gamma and Search for CP Violation in Radiative Charm Decays 査読

    T. Nanut, A. Zupanc, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, V. Bhardwaj, J. Biswal, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, R. Chistov, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, B. Golob, K. Hayasaka, H. Hayashii, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, Y. Iwasaki, W. W. Jacobs, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, K. H. Kang, T. Kawasaki, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, M. Nakao, K. J. Nath, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, B. Pal, C. -S. Park, C. W. Park, H. Park, S. Paul, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, K. Prasanth, C. Pulvermacher, J. Rauch, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, T. Schulter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, E. Solovieva, S. Stanic, M. Staric, J. F. Strube, J. Stypula, T. Sumiyoshi, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, M. Uchida, S. Uno, Y. Ushiroda, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, E. Widmann, E. Won, J. Yamaoka, Y. Yamashita, J. Yelton, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    PHYSICAL REVIEW LETTERS   118 ( 5 )   051801-1 - 051801-8   2017年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of the radiative charm decay D-0 -&gt; rho(0)gamma and the first search for CP violation in decays D-0 -&gt; rho(0)gamma, phi gamma, and (K) over bar (*0)(892)gamma, using a data sample of 943 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The branching fraction is measured to be B(D-0 -&gt; rho(0)gamma) = (1.77 +/- 0.30 +/- 0.07) x 10(-5), where the first uncertainty is statistical and the second is systematic. The obtained CP asymmetries A(CP)(D-0 -&gt;rho(0)gamma) = +0.056 +/- 0.152 +/- 0.006, A(CP)(D-0 -&gt; phi gamma) = -0.094 +/- 0.066 +/- 0.001, and A(CP)(D-0 -&gt; (K) over bar (*0) gamma = -0.003 +/- 0.020 +/- 0.000 are consistent with no CP violation. We also present an improved measurement of the branching fractions B(D-0 -&gt; phi gamma) = (2.76 +/- 0.19 +/- 0.10) x 10(-5) and B(D-0 -&gt; (K) over bar (*0) gamma = (4.66 +/- 0.21 +/- 0.21) x 10(-4).

    DOI: 10.1103/PhysRevLett.118.051801

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  • Search for the 0(--) glueball in Upsilon(1S) and Upsilon(2S) decays 査読

    S. Jia, C. P. Shen, C. Z. Yuan, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. -K. Choi, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, P. Katrenko, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y. -J. Kwon, J. S. Lange, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, H. K. Moon, T. Mori, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, H. Ono, Y. Onuki, W. Ostrowicz, G. Pakhlova, B. Pal, C. -S. Park, H. Park, R. Pestotnik, L. E. Piilonen, C. Pulvermacher, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, M. Staric, J. F. Strube, M. Sumihama, T. Sumiyoshi, K. Suzuki, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, V. Vorobyev, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, E. Widmann, E. Won, Y. Yamashita, H. Ye, J. Yelton, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   95 ( 1 )   012001-1 - 012001-13   2017年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first search for the J(PC) = 0(--) glueball in Upsilon(1S) and Upsilon(2S) decays with data samples of (102 +/- 2) x 10(6) and (158 +/- 4) x 10(6) events, respectively, collected with the Belle detector. No significant signals are observed in any of the proposed production modes, and the 90% credibility level upper limits on their branching fractions in Upsilon(1S) and Upsilon(2S) decays are obtained. The inclusive branching fractions of the Upsilon(1S) and Upsilon(2S) decays into final states with chi(c1) are measured to be B(Upsilon(1S) -&gt; chi(c1) + anything) = (1.90 +/- 0.43(stat) +/- 0.14(syst) x 10(-4) with an improved precision over prior measurements and B Upsilon(2S) -&gt; chi(c1) + anything) = (2.24 +/- 0.44(stat) +/- 0.20(syst) x 10(-4) for the first time.

    DOI: 10.1103/PhysRevD.95.012001

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  • Search for a dark vector gauge boson decaying to pi(+)pi(-) using eta -&gt;pi(+)pi(-) gamma decays 査読

    E. Won, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drsal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, D. Greenwald, J. Haba, K. Hayasaka, H. Hayashii, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, T. Kawasaki, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, Y. -J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, E. Nakano, M. Nakao, H. Nakazawa, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, B. Pal, C. -S. Park, S. Paul, T. K. Pedlar, L. E. Piilonen, C. Pulvermacher, J. Rauch, M. Ritter, H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, T. Schluter, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, D. Semmler, K. Senyo, O. Seon, I. S. Seong, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, M. Staric, T. Sumiyoshi, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, K. E. Varvell, V. Vorobyev, C. H. Wang, M. -Z. Wang, M. Watanabe, Y. Watanabe, E. Widmann, J. Yamaoka, H. Ye, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   94 ( 9 )   092006-1 - 092006-6   2016年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a search for a dark vector gauge boson U' that couples to quarks in the decay chain D*(+) -&gt; D-0 pi(+), D-0 -&gt; K-S(0) eta, eta -&gt; U'gamma, U' -&gt; pi(+)pi- No signal is found and we set a mass-dependent limit on the baryonic fine structure constant of 10(-3)-10(-2) in the U' mass range of 290 to 520 MeV/c(2). This analysis is based on a data sample of 976 fb(-1) collected by the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.94.092006

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  • Measurement of the branching ratio of ${\overline{B } }^{0}{\rightarrow}{D}^{*+}{ { \tau } }^{ { - } }{\overline{ { \nu } } }_{ { \tau } }$ relative to ${\overline{B } }^{0}{\rightarrow}{D}^{*+}{ { \ell } }^{ { - } }{\overline{ { \nu } } }_{ { \ell } }$ decays with a semileptonic tagging meth 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   94 ( 7 )   072007-1 - 072007-12   2016年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.94.072007

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  • Measurement of the branching ratio of (B)over-bar(0) -&gt; D*(+)tau(-)(nu)over-bar(tau) relative to (B)over-bar(0) -&gt; D*(+)l(-)(nu)over-bar(l) decays with a semileptonic tagging method 査読

    Y. Sato, T. Iijima, K. Adamczyk, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, G. Bonvicini, A. Bozek, M. Bracko, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, M. Danilov, N. Dash, S. Di Carlo, Z. Dolezal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, P. Goldenzweig, B. Golob, D. Greenwald, K. Hara, T. Hara, J. Hasenbusch, K. Hayasaka, H. Hayashii, S. Hirose, T. Horiguchi, W. -S. Hou, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, H. B. Jeon, D. Joffe, T. Julius, K. H. Kang, Y. Kato, P. Katrenko, T. Kawasaki, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krokovny, T. Kuhr, R. Kumar, Y. -J. Kwon, J. S. Lange, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. K. Moon, K. R. Nakamura, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, K. Negishi, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, B. Pal, C. -S. Park, S. Paul, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, M. V. Purohit, J. Rauch, A. Rostomyan, M. Rozanska, Y. Sakai, S. Sandilya, L. Santelj, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, E. Solovieva, S. Stanic, M. Staric, J. F. Strube, T. Sumiyoshi, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, M. Uchida, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, C. Van Hulse, G. Varner, A. Vinokurova, V. Vorobyev, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, J. Yamaoka, Y. Yamashita, J. Yelton, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   94 ( 7 )   2016年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the ratio R(D*) = B((B) over bar (0) -&gt; D*(+)tau(-)(nu) over bar (tau))/B((B) over bar (0) -&gt; D*(+)l(-)(nu) over bar (l))where l denotes an electron or a muon. The results are based on a data sample containing 772 x 10(6) B (B) over bar pairs recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. We select a sample of B-0(B) over bar (0) pairs by reconstructing both B mesons in semileptonic decays to D*(-/+)l(+/-). We measure R(D*) = 0.302 +/- 0.030(stat) +/- 0.011(syst), which is within 1.6 sigma of the Standard Model theoretical expectation, where the standard deviation sigma includes systematic uncertainties. We use this measurement to constrain several scenarios of new physics in a model-independent approach.

    DOI: 10.1103/PhysRevD.94.072007

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  • Evidence for the decay B0 →ηπ0 査読

    B. Pal, A. J. Schwartz, A. Abdesselam, I. Adachi, I. Adachi, H. Aihara, S. Al Said, S. Al Said, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, T. Aushev, R. Ayad, V. Babu, I. Badhrees, I. Badhrees, A. M. Bakich, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, M. Bračko, T. E. Browder, D. Červenkov, M. C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, J. Dalseno, Z. Doležal, Z. Drásal, A. Drutskoy, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, O. Frost, B. G. Fulsom, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, B. Golob, O. Grzymkowska, T. Hara, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. S. Hou, M. Huschle, H. J. Hyun, T. Iijima, T. Iijima, A. Ishikawa, R. Itoh, R. Itoh, Y. Iwasaki, I. Jaegle, T. Julius, K. H. Kang, E. Kato, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, S. Korpar, P. Križan, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, D. H. Lee, I. S. Lee, Y. Li, L. Li Gioi

    Physical Review D - Particles, Fields, Gravitation and Cosmology   92 ( 1 )   2016年9月

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    © 2015 American Physical Society. © 2015 American Physical Society. We report a search for the charmless hadronic decay B0→ηπ0 with a data sample corresponding to an integrated luminosity of 694 fb-1 containing 753×106 BB¯ pairs. The data were collected by the Belle experiment running on the Y(4S) resonance at the KEKB e+e- collider. We measure a branching fraction B(B0→ηπ0)=(4.1-1.5-0.7+1.7+0.5)×10-7, where the first uncertainty is statistical and the second is systematic. Our measurement gives an upper limit of B(B0→ηπ0)&lt;6.5×10-7 at 90% confidence level. The signal has a significance of 3.0 standard deviations and constitutes the first evidence for this decay mode.

    DOI: 10.1103/PhysRevD.92.011101

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  • Study of excited Xi(c) states decaying into Xi(0)(c) and Xi(+)(c) baryons 査読

    J. Yelton, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, I. Badhrees, S. Bahinipati, A. M. Bakich, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, Y. Choi, D. Cinabro, M. Danilov, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, T. Hara, K. Hayasaka, H. Hayashii, W. -S. Hou, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, Y. Kato, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, C. H. Li, H. Li, L. Li, Y. Li, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. K. Moon, T. Nanut, K. J. Nath, M. Nayak, K. Negishi, M. Niiyama, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, B. Pal, C. -S. Park, H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, C. Pulvermacher, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, E. Widmann, K. M. Williams, E. Won, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   94 ( 5 )   052011-1 - 052011-14   2016年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using a data sample of 980 fb(-1) of e(+)e(-) annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy e(+)e(-) collider, we report the results of a study of excited Xi(c) states that decay, via the emission of photons and/or charged pions, into Xi(0)(c) or Xi(+)(c) ground state charmed-strange baryons. We present new measurements of the masses of all members of the Xi(0)(c), Xi(c)(2645), Xi(c)(2790), Xi(c)(2815), and Xi(c)(2980) isodoublets, measurements of the intrinsic widths of those that decay strongly, and evidence of previously unknown transitions.

    DOI: 10.1103/PhysRevD.94.052011

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  • Energy Scan of the e(+)e(-) -&gt; h(b)(nP)pi(+)pi(-) (n=1, 2) Cross Sections and Evidence for gamma(11020) Decays into Charged Bottomoniumlike States 査読

    R. Mizuk, A. Bondar, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, E. Barberio, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, Z. Dolezal, A. Drutskoy, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, V. Gaur, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, D. Greenwald, T. Hara, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, Y. Iwasaki, I. Jaegle, T. Julius, K. H. Kang, P. Katrenko, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, C. H. Li, H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, G. B. Mohanty, A. Moll, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, K. Negishi, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, M. Ritter, Y. Sakai, S. Sandilya, T. Sanuki, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, E. Solovieva, M. Staric, J. Stypula, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, Y. Teramoto, I. Tikhomirov, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, V. Vorobyev, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, Y. Yamashita, J. Yelton, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   117 ( 14 )   142001-1 - 142001-7   2016年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we measure the energy dependence of the e(+)e(-) -&gt; h(b)(nP)pi(+)pi(-) (n = 1, 2) cross sections from thresholds up to 11.02 GeV. We find clear gamma(10860) and gamma(11020) peaks with little or no continuum contribution. We study the resonant substructure of the gamma(11020) -&gt; h(b)(nP)pi(+)pi(_) transitions and find evidence that they proceed entirely via the intermediate isovector states Z(b)(10610) and Z(b)(10650). The relative fraction of these states is loosely constrained by the current data: The hypothesis that only Z(b)(10610) is produced is excluded at the level of 3.3 standard deviations, while the hypothesis that only Z(b)(10650) is produced is not excluded at a significant level.

    DOI: 10.1103/PhysRevLett.117.142001

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  • Measurement of the CKM angle phi(1) in B-0 -&gt; (D)over-bar(*)(0)h(0), (D)over-bar(0) -&gt; K-S(0)pi(+)pi(-) decays with time-dependent binned Dalitz plot analysis 査読

    V. Vorobyev, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, I. Badhrees, S. Bahinipati, A. M. Bakich, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, M. Danilov, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, P. Goldenzweig, D. Greenwald, J. Haba, K. Hayasaka, H. Hayashii, W. -S. Hou, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodys, D. Kotchetkov, P. Krizan, P. Krokovny, R. Kumar, T. Kumita, Y. -J. Kwon, J. S. Lange, C. H. Li, H. Li, L. Li, Y. Li, J. Libby, D. Liventsev, M. Lubej, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. K. Moon, R. Mussa, M. Nakao, T. Nanut, K. J. Nath, M. Nayak, K. Negishi, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, B. Pal, C. -S. Park, C. W. Park, H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, J. Rauch, M. Ritter, Y. Sakai, S. Sandilya, T. Sanuki, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, M. Staric, J. F. Strube, T. Sumiyoshi, M. Takizawa, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, Y. Yamashita, S. Yashchenko, J. Yelton, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   94 ( 5 )   052004   2016年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the CP-violation parameter phi(1) obtained in a time-dependent analysis of B-0 -&gt; (D) over bar(*)(0)h(0) decays followed by (D) over bar (0) -&gt; K-S(0)pi(+)pi decay. A model-independent measurement is performed using the binned Dalitz plot technique. The measured value is phi(1) = 11.7 degrees +/- 7.8 degrees(stat) +/- 2.1 degrees (syst). Treating sin 2 phi(1) and cos 2 phi(1) as independent parameters, we obtain sin 2 phi(1) = 0.43 +/- 0.27(stat) +/- 0.08(syst) and cos 2 phi(1) = 1.06 +/- 0.33(stat)(-0.15)(+0.21)(syst). The results are obtained with a full data sample of 772 x 10(6)B (B) over bar pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.94.052004

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  • Measurement of the CKM angle ${ { \varphi } }_{1}$ in ${B}^{0}{\rightarrow}{\overline{D } }^{(*)0}{h}^{0}$, ${\overline{D } }^{0}{\rightarrow}{K}_{S}^{0}{ { \pi } }^{+}{ { \pi } }^{ { - } }$ decays with time-dependent binned Dalitz plot analysis 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   94 ( 5 )   052004-1 - 052004-15   2016年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.94.052004

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  • Studies of charmed strange baryons in the Lambda D final state at Belle 査読

    Y. Kato, T. Iijima, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, R. Ayad, I. Badhrees, A. M. Bakich, E. Barberio, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, R. Glattauer, P. Goldenzweig, O. Grzymkowska, J. Haba, K. Hayasaka, H. Hayashii, S. Hirose, W. -S. Hou, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, K. K. Joo, T. Julius, E. Kato, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, C. H. Li, H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, B. Pal, C. -S. Park, H. Park, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, J. Rauch, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, T. Schluter, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, D. Semmler, K. Senyo, O. Seon, I. S. Seong, M. E. Sevior, C. P. Shen, T. -A. Shibata, J. -G. Shiu, A. Sokolov, E. Solovieva, M. Staric, M. Sumihama, T. Sumiyoshi, M. Takizawa, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, V. Vorobyev, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, S. Wehle, K. M. Williams, E. Won, J. Yamaoka, Y. Yamashita, S. Yashchenko, H. Ye, J. Yelton, Y. Yook, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   94 ( 3 )   032002-1 - 032002-10   2016年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the discovery of Xi(c)(3055)(0), observed by its decay into the final-state Lambda D-0, and present the first observation and evidence of the decays of Xi(c)(3055)(+) and Xi(c)(3080)(+) into Lambda D+. We also perform a combined analysis of the Lambda D+ with the Sigma K-++(c)- and Sigma(c)*K-++(-) decay modes to measure the ratios of branching fractions, masses and widths with improved accuracy. We measure the ratios of branching fractions B(Xi(c)(3055)(+) -&gt; Lambda D+)/B(Xi(c)(3055)(+) -&gt; Sigma(++)(c) K-) = 5.09 +/- 1.01 +/- 0.76, B(Xi(c)(3080)(+) -&gt; Lambda D+)/B(Xi(c)(3080)(+) -&gt; Sigma K-++(c)-) = 1.29 +/- 0.30 +/- 0.15, and B(Xi(c)(3080)(+) -&gt; Sigma(c)*K-++(-))/B(Xi(c)(3080)(+) -&gt; Sigma K-++(c)-) = 1.07 +/- 0.27 +/- 0.04, where the uncertainties are statistical and systematic. The analysis is performed using a 980 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.94.032002

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  • Search for a massive invisible particle X-0 in B+ -&gt; e(+)X(0) and B+ -&gt; mu X-+(0) decays 査読

    C-S. Park, Y-J. Kwon, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, P. Behera, V. Bhardwaj, J. Biswal, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, Z. Dolezal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, O. Grzymkowska, T. Hara, K. Hayasaka, H. Hayashii, M. Heck, W-S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, H. B. Jeon, T. Julius, K. H. Kang, E. Kato, P. Katrenko, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, I. S. Lee, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, K. J. Nath, M. Nayak, K. Negishi, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, M. Petric, L. E. Piilonen, C. Pulvermacher, M. V. Purohit, J. Rauch, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T-A. Shibata, J-G. Shiu, B. Shwartz, F. Simon, A. Sokolov, S. Stanic, M. Staric, J. Stypula, T. Sumiyoshi, U. Tamponi, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, M. N. Wagner, C. H. Wang, M-Z. Wang, P. Wang, Y. Watanabe, E. Won, J. Yamaoka, S. Yashchenko, H. Ye, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   94 ( 1 )   012003-1 - 012003-8   2016年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a search for a non-Standard-Model invisible particle X-0 in the mass range 0.1-1.8 GeV/c(2) in B+ -&gt; e(+)X(0) and B+ -&gt; mu X-+(0) decays. The results are obtained from a 711 fb(-1) data sample that corresponds to 772 x 10(6) B (B) over bar pairs, collected at the Upsilon(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. One B meson is fully reconstructed in a hadronic mode to determine the momentum of the lepton of the signal decay in the rest frame of the recoiling partner B meson. We find no evidence of a signal and set upper limits on the order of 10(-6).

    DOI: 10.1103/PhysRevD.94.012003

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  • First observation of gamma gamma -&gt; p(p)over-barK(+)K(-) and search for exotic baryons in pK systems 査読

    C. P. Shen, C. Z. Yuan, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, W. X. Fang, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, R. Glattauer, P. Goldenzweig, O. Grzymkowska, J. Haba, K. Hayasaka, H. Hayashii, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, H. B. Jeon, K. K. Joo, T. Julius, K. H. Kang, E. Kato, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, J. S. Lange, C. H. Li, H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, S. Nishida, S. Ogawa, S. L. Olsen, W. Ostrowicz, P. Pakhlov, G. Pakhlova, B. Pal, C. -S. Park, H. Park, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, J. Rauch, M. Ritter, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, D. Semmler, K. Senyo, I. S. Seong, M. E. Sevior, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, J. F. Strube, J. Stypula, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, J. Yelton, Y. Yook, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 11 )   112017-1 - 112017-9   2016年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The process gamma gamma -&gt; p (p) over barK(+)K(-) and its intermediate processes are measured for the first time using a 980 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The production of p (p) over barK(+)K(-) and a Lambda(1520)(0) ((Lambda) over bar (1520)(0)) signal in the pK(-) ((p) over barK(+)) invariant mass spectrum are clearly observed. However, no evidence for an exotic baryon near 1540 MeV/c(2), denoted as Theta(1540)(0) ((Theta) over bar (1540)(0)) or Theta(1540)(++) (Theta(1540)(--)), is seen in the pK(-) ((p) over barK(+)) or pK(+) ((p) over barK(-)) invariant mass spectra. Cross sections for gamma gamma -&gt; p (p) over barK(+)K(-), Lambda(1520)(0)(p) over barK(+) + c.c. and the products sigma(gamma gamma -&gt; Theta(1540)(0)(p) over barK(+) + c.c.)B(Theta(1540)(0) -&gt; pK(-)) and sigma(gamma gamma -&gt; Theta(1540)(++)(p) over barK(-) + c.c.)B(Theta(1540)(++) -&gt; pK(+)) are measured. We also determine upper limits on the products of the chi(c0) and chi(c2) two-photon decay widths and their branching fractions to p (p) over barK(+)K(-) at the 90% credibility level.

    DOI: 10.1103/PhysRevD.93.112017

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  • Search for XYZ states in Upsilon(1S) inclusive decays 査読

    C. P. Shen, C. Z. Yuan, Y. Ban, H. Aihara, D. M. Asner, I. Badhrees, A. M. Bakich, E. Barberio, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, P. Goldenzweig, J. Haba, K. Hayasaka, H. Hayashii, W. -S. Hou, T. Iijima, G. Inguglia, A. Ishikawa, R. Itoh, W. W. Jacobs, H. B. Jeon, K. K. Joo, T. Julius, K. H. Kang, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, C. H. Li, H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, A. Moll, H. K. Moon, R. Mussa, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, K. Negishi, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, B. Pal, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, O. Seon, I. S. Seong, M. E. Sevior, T. -A. Shibata, J. -G. Shiu, F. Simon, A. Sokolov, E. Solovieva, M. Staric, T. Sumiyoshi, M. Takizawa, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, G. Varner, A. Vinokurova, V. Vorobyev, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, S. D. Yang, S. Yashchenko, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 11 )   112013-1 - 112013-11   2016年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The branching fractions of the Upsilon(1S) inclusive decays into final states with a J/psi or psi(2S) are measured with improved precision to be B Upsilon(1S) -&gt; J/psi + anything = (5.25 +/- 0.13(stat) +/- 0.25(syst) x 10(-4) and B Upsilon(1S) -&gt; psi(2S) + anything = (1.23 +/- 0.17(stat) +/- 0.11(syst)) x 10(-4). The first search for Upsilon(1S) decays into XYZ states that decay into a J/psi or a psi(2S) plus one or two charged tracks yields no significant signals for XYZ states in any of the examined decay modes, and upper limits on their production rates in Upsilon(1S) inclusive decays are determined.

    DOI: 10.1103/PhysRevD.93.112013

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  • Search for the decay B-0 -&gt; phi gamma 査読

    Z. King, B. Pal, A. J. Schwartz, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, A. M. Bakich, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, T. E. Browder, D. Cervenkov, V. Chekelian, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, N. Dash, Z. Dolezal, D. Dutta, S. Eidelman, H. Farhat, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, P. Goldenzweig, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, T. Horiguchi, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, K. K. Joo, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, I. S. Lee, C. H. Li, H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, M. Nakao, H. Nakazawa, T. Nanut, K. J. Nath, K. Negishi, S. Nishida, S. Ogawa, S. Okuno, W. Ostrowicz, C. W. Park, S. Paul, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, J. Rauch, M. Ritter, A. Rostomyan, S. Ryu, H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, E. Solovieva, S. Stanic, M. Staric, J. F. Strube, J. Stypula, M. Sumihama, M. Takizawa, N. Taniguchi, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, P. Vanhoefer, G. Varner, K. E. Varvell, V. Vorobyev, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, S. Wehle, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, Y. Yook, C. Z. Yuan, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   93 ( 11 )   111101-1 - 111101-6   2016年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We have searched for the decay B-0 -&gt; phi gamma sing the full Belle data set of 772 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. No signal is observed, and we set an upper limit on the branching fraction of B(B-0 -&gt; phi gamma) &lt; 1.0 x 10(-7) at the 90% confidence level. This is the most stringent limit on this decay mode to date.

    DOI: 10.1103/PhysRevD.93.111101

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  • First Observation of the Doubly Cabibbo-Suppressed Decay of a Charmed Baryon: Lambda(+)(c) -&gt; pK(+)pi(-) 査読

    S. B. Yang, K. Tanida, B. H. Kim, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, V. Bhardwaj, B. Bhuyan, J. Biswal, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, N. Gabyshev, A. Garmash, V. Gaur, R. Gillard, Y. M. Goh, P. Goldenzweig, D. Greenwald, J. Grygier, J. Haba, P. Hamer, T. Hara, K. Hayasaka, H. Hayashii, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, K. K. Joo, T. Julius, K. H. Kang, E. Kato, P. Katrenko, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, N. Kobayashi, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, M. Nayak, K. Negishi, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, J. Rauch, M. Ritter, A. Rostomyan, S. Ryu, H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, O. Seon, I. S. Seong, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, Y. -S. Sohn, A. Sokolov, S. Stanic, M. Staric, J. Stypula, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, Y. Teramoto, K. Trabelsi, V. Trusov, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, H. Ye, J. Yelton, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   117 ( 1 )   011801-1 - 011801-6   2016年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of the decay Lambda(+)(c) -&gt; pK(+)pi(-) using a 980 fb(-1) data sample collected by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. This is the first observation of a doubly Cabibbo-suppressed decay of a charmed baryon. We measure the branching ratio of this decay with respect to its Cabibbo-favored counterpart to be B(Lambda(+)(c) -&gt; pK(+)pi(-))/B(Lambda(+)(c) -&gt; pK(-)pi(+)) = (2.35 +/- 0.27 +/- 0.21) x 10(-3), where the uncertainties are statistical and systematic, respectively.

    DOI: 10.1103/PhysRevLett.117.011801

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  • Observation of Z(b)(10610) and Z(b)(10650) Decaying to B Mesons 査読

    A. Garmash, A. Abdesselam, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, A. M. Bakich, P. Behera, V. Bhardwaj, B. Bhuyan, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, Z. Dolezal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, T. Hara, K. Hayasaka, H. Hayashii, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, C. Li, H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, S. Nishida, S. L. Olsen, P. Pakhlov, G. Pakhlova, B. Pal, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, E. Ribezl, M. Ritter, A. Rostomyan, H. Sahoo, Y. Sakai, S. Sandilya, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, D. Semmler, K. Senyo, I. S. Seong, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, Y. -S. Sohn, E. Solovieva, M. Staric, T. Sumiyoshi, U. Tamponi, K. Tanida, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, J. Yamaoka, S. Yashchenko, J. Yelton, Y. Yook, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   116 ( 21 )   212001-1 - 212001-7   2016年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the analysis of the three-body e(+)e(-) -&gt; B (B) over bar pi(+/-), B (B) over bar*pi(+/-), and B*(B) over bar* pi(+/-) processes, including the first observations of the Z(b)(+/-)(10610) -&gt; [B (B) over bar* + c.c.](+/-) and Z(b)(+/-)(10650) -&gt; [B*(B) over bar*](+/-) transitions that are found to dominate the corresponding final states. We measure Born cross sections for the three-body production of sigma(e(+)e(-) -&gt; [B (B) over bar* + c.c.](+/-)pi(-/+)) = [17.4 +/- 1.6(stat) +/- 1.9(syst)]pb and sigma(e(+)e(-) -&gt; [B*(B) over bar*](+/-)pi(-/+)) = [8.75 +/- 1.15(stat) +/- 1.04(syst)] pb and set a 90% C.L. upper limit of sigma(e(+)e(-) -&gt; [B (B) over bar](+/-)pi(-/+)) &lt; 2.9 pb. The results are based on a 121.4 fb(-1) data sample collected with the Belle detector at a center-of-mass energy near the Upsilon(10860) peak.

    DOI: 10.1103/PhysRevLett.116.212001

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  • Observation of the Decay B-s(0) -&gt; K-0(K)over-bar(0) 査読

    B. Pal, A. J. Schwartz, A. Abdesselam, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, E. Barberio, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, N. Dash, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, B. G. Fulsom, V. Gaur, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, D. Greenwald, O. Grzymkowska, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, K. Inami, A. Ishikawa, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, I. S. Lee, C. H. Li, H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, T. Luo, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, S. Paul, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, J. Rauch, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, H. Sahoo, Y. Sakai, S. Sandilya, T. Sanuki, Y. Sato, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, O. Seon, I. S. Seong, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, J. Stypula, M. Sumihama, T. Sumiyoshi, U. Tamponi, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, J. Yelton, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   116 ( 16 )   161801-1 - 161801-6   2016年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We measure the decay B-s(0) -&gt; K-0(K) over bar (0) using data collected at the Upsilon(5S) resonance with the Belle detector at the KEKB e(+)e(-) collider. The data sample used corresponds to an integrated luminosity of 121.4 fb(-1). We measure a branching fraction beta(B-s(0) -&gt; K-0(K) over bar (0)) = [19.6(-5.1)(+5.8)(stat) +/- 1.0(syst) +/- 2.0(N-Bs0 (B) over bar s0)] x 10(-6) with a significance of 5.1 standard deviations. This measurement constitutes the first observation of this decay.

    DOI: 10.1103/PhysRevLett.116.161801

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  • First model-independent Dalitz analysis of B0 → DK∗0, D → KS π+π-decay 査読

    Negishi K, Ishikawa A, Yamamoto H, Abdesselam A, Adachi I, Aihara H, Said A.Al, Asner D.M, Aulchenko V, Aushev T, Ayad R, Babu V, Badhrees I, Bahinipati S, Bakich A.M, Barberio E, Biswal J, Bonvicini G, Bozek A, Bracko M, Browder T.E, Chekelian V, Chen A, Cheon B.G, Chilikin K, Chistov R, Cho K, Chobanova V, Choi S.-K, Choi Y, Cinabro D, Dalseno J, Danilov M, Dolezal Z, Drutskoy A, Dutta D, Eidelman S, Farhat H, Fast J.E, Ferber T, Fulsom B.G, Gaur V, Gabyshev N, Garmash A, Getzkow D, Gillard R, Glattauer R, Goh Y.M, Goldenzweig P, Golob B, Grzymkowska O, Haba J, Hara T, Hayasaka K, Hayashii H, He X.H, Horiguchi T, Hou W.-S, Iijima T, Inami K, Itoh R, Iwasaki Y, Jaegle I, Joffe D, Joo K.K, Julius T, Kang K.H, Kawasaki T, Kiesling C, Kim D.Y, Kim J.B, Kim J.H, Kim K.T, Kim M.J, Kim S.H, Kim Y.J, Kinoshita K, Ko B.R, Kodys P, Korpar S, Krizan P, Krokovny P, Kumita T, Kuzmin A, Kwon Y.-J, Lange J.S, Lee I.S, Lewis P, Li Y, Li Gioi L, Libby J, Liventsev D, Lukin P, Masuda M, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty G.B, Moll A, Moon H.K, Mussa R, Nakao M, Nanut T, Natkaniec Z, Nayak M, Nisar N.K, Nishida S, Ogawa S, Okuno S, Onuki Y, Pakhlov P, Pakhlova G, Pal B, Park C.W, Park H, Pedlar T.K, Pesantez L, Pestotnik R, Petric M, Piilonen L.E, Pulvermacher C, Ribezl E, Ritter M, Rostomyan A, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schneider O, Schnell G, Schwanda C, Senyo K, Sevior M.E, Shebalin V, Shen C.P, Shibata T.-A, Shiu J.-G, Simon F, Sohn Y.-S, Solovieva E, Stanic S, Staric M, Steder M, Sumihama M, Sumiyoshi T, Tamponi U, Teramoto Y, Uchida M, Unno Y, Uno S, Urquijo P, Van Hulse C, Vanhoefer P, Varner G, Vinokurova A, Vossen A, Wagner M.N, Wang C.H, Wang M.-Z, Wang P, Wang X.L, Watanabe M, Watanabe Y, Wehle S, Williams K.M, Won E, Yamaoka J, Yamashita Y, Yashchenko S, Yelton J, Yook Y, Yuan C.Z, Yusa Y, Zhang Z.P, Zhilich V, Zhulanov V, Zupanc A

    Progress of Theoretical and Experimental Physics   2016 ( 4 )   2016年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1093/ptep/ptw030

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Inclusive and exclusive measurements of B decays to chi(c1) and chi(c2) at Belle 査読

    V. Bhardwaj, K. Miyabayashi, E. Panzenboeck, K. Trabelsi, A. Frey, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, A. Bala, V. Bansal, E. Barberio, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S-K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, O. Frost, B. G. Fulsom, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, P. Goldenzweig, B. Golob, D. Greenwald, J. Haba, P. Hamer, K. Hayasaka, H. Hayashii, X. H. He, W-S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, E. Kato, P. Katrenko, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, Y-J. Kwon, I. S. Lee, C. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, A. Loos, P. Lukin, M. Masuda, D. Matvienko, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, M. V. Purohit, J. Rauch, E. Ribezl, M. Ritter, A. Rostomyan, H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T-A. Shibata, J-G. Shiu, B. Shwartz, F. Simon, J. B. Singh, Y-S. Sohn, A. Sokolov, E. Solovieva, M. Staric, J. Stypula, M. Sumihama, T. Sumiyoshi, U. Tamponi, K. Tanida, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, C. H. Wang, M-Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, S. Wehle, E. Won, J. Yamaoka, S. Yashchenko, H. Ye, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 5 )   052016-1 - 052016-13   2016年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report inclusive and exclusive measurements for chi(c1) and chi(c2) production in B decays. We measure B(B -&gt; chi X-c1) = (3.03 +/- 0.05 (stat) +/- 0.24(syst)) x 10(-3) and B(B -&gt; chi X-c2) = (0.70 +/- 0.06 (stat) +/- 0.10(syst)) x 10(-3). For the first time, chi(c2) production in exclusive B decays in the modes B-0 -&gt; chi(c2) pi K--(+) and B-0 -&gt; chi(c2) pi(-)pi K-+(+) has been observed, along with first evidence for the B-0 -&gt; chi(c2) pi K--(s)0 decay mode. For chi c1 production, we report the first observation in the B+ -&gt; chi(c1) pi(-)pi K-+(+), B-0 -&gt; chi(c1) pi(-)pi K-+(s)0 and B-0 -&gt; chi(c1) pi(-)pi K-+(+) decay modes. Using these decay modes, we observe a difference in the production mechanism of chi(c2) in comparison to chi(c1) in B decays. In addition, we report searches for X(3872) and chi(c1) (2P) in the B+ -&gt; (chi(c1) pi(+)pi(-))K+ decay mode. The reported results use 772 x 10(6) B (B) over bar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.93.052016

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  • Search for the rare decay D-0 -&gt; gamma gamma at Belle 査読

    N. K. Nisar, G. B. Mohanty, K. Trabelsi, T. Aziz, A. Abdesselam, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, E. Barberio, P. Behera, V. Bhardwaj, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, F. Breibeck, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, N. Dash, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, B. G. Fulsom, V. Gaur, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, D. Greenwald, O. Grzymkowska, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, K. Inami, A. Ishikawa, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, I. S. Lee, J. S. Lange, H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, S. Mohanty, A. Moll, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, M. Niiyama, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, S. Paul, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, K. Prasanth, C. Pulvermacher, J. Rauch, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, H. Sahoo, Y. Sakai, S. Sandilya, T. Sanuki, Y. Sato, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, O. Seon, I. S. Seong, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, J. B. Singh, Y. -S. Sohn, E. Solovieva, S. Stanic, M. Staric, J. Stypula, M. Sumihama, T. Sumiyoshi, U. Tamponi, Y. Teramoto, M. Uchida, T. Uglov, S. Uno, P. Urquijo, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yelton, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 5 )   051102-1 - 051102-7   2016年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We search for the rare radiative decay D-0 -&gt; gamma gamma using a data sample with an integrated luminosity of 832 fb(-1) recorded by the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider. We find no statistically significant signal and set an upper limit on the branching fraction of B(D-0 -&gt; gamma gamma) &lt; 8.5 x 10(-7) at 90% confidence level. This is the most restrictive limit on the decay channel to date.

    DOI: 10.1103/PhysRevD.93.051102

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  • Measurement of the decay B -&gt; Dl nu(l) in fully reconstructed events and determination of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cb vertical bar 査読

    R. Glattauer, C. Schwanda, A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, B. Bhuyan, J. Biswal, G. Bonvicini, A. Bozek, M. Bracko, F. Breibeck, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, J. Dingfelder, Z. Dolezal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, A. Frey, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, D. Greenwald, J. Haba, P. Hamer, T. Hara, J. Hasenbusch, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, I. S. Lee, L. Li, Y. Li, J. Libby, Y. Liu, D. Liventsev, P. Lukin, J. MacNaughton, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, C. Oswald, P. Pakhlov, G. Pakhlova, B. Pal, H. Park, T. K. Pedlar, L. Pesntez, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, J. Rauch, E. Ribezl, M. Ritter, A. Rostomyan, H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, A. J. Schwartz, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, T. Sumiyoshi, U. Tamponi, Y. Teramoto, K. Trabelsi, V. Trusov, M. Uchida, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, V. Vorobyev, A. Vossen, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, E. Won, H. Yamamoto, Y. Yamashita, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 3 )   032006-1 - 032006-14   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a determination of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cb vertical bar using the decay B -&gt; Dl nu(l) (l = e,mu) based on 711 fb(-1) of e(+)e(-) -&gt; Upsilon(4S) data recorded by the Belle detector and containing 772 x 10(6) B (B) over bar pairs. One B meson in the event is fully reconstructed in a hadronic decay mode, while the other, on the signal side, is partially reconstructed from a charged lepton and either a D+ or D-0 meson in a total of 23 hadronic decay modes. The isospin-averaged branching fraction of the decay B -&gt; Dl nu(l) is found to be B(B-0 -&gt; D(-)l(vertical bar)nu(l)) = (2.31 +/- 0.03(stat) +/- 0.11(syst))%. Analyzing the differential decay rate as a function of the hadronic recoil with the parametrization of Caprini, Lellouch, and Neubert and using the form-factor prediction G(1) = 1.0541 +/- 0.0083 calculated by FNAL/MILC, we obtain eta(EW)vertical bar V-cb vertical bar = (40.12 +/- 1.34) x 10(-3), where eta(EW) is the electroweak correction factor. Alternatively, assuming the model-independent form-factor parametrization of Boyd, Grinstein, and Lebed and using lattice QCD data from the FNAL/MILC and HPQCD collaborations, we find eta(EW)vertical bar V-cb vertical bar = (41.10 +/- 1.14) x 10(-3).

    DOI: 10.1103/PhysRevD.93.032006

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  • Measurement of D-0-(D)over-bar(0) mixing and search for CP violation in D-0 -&gt; K+K-, pi(+)pi(-) decays with the full Belle data set 査読

    M. Staric, A. Abdesselam, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, J. Biswal, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, R. Goldenzweig, B. Golob, J. Grygier, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, I. Jaegle, D. Joffe, T. Julius, K. H. Kang, T. Kawasaki, T. Keck, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, R. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y-J. Kwon, J. S. Lange, I. S. Lee, R. Lewis, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, R. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. K. Moon, R. Mussa, M. Nakao, T. Nanut, Z. Natkaniec, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, R. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, K. Senyo, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Steder, M. Sumihama, U. Tamponi, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, R. Urquijo, Y. Usov, C. Van Hulse, R. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, R. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, S. Yashchenko, Y. Yook, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhulanov, M. Ziegler, A. Zupanc

    PHYSICS LETTERS B   753   412 - 418   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We report an improved measurement of D-0-(D) over bar (0) mixing and a search for CP violation in D-0 decays to CP-even final states K+K- and pi(+)pi(-). The measurement is based on the final Belle data sample of 976 fb(-1). The results are y(CP) = (1.11 +/- 0.22 +/- 0.09)% and A(Gamma) =(-0.03 +/- 0.20 +/- 0.07)%, where the first uncertainty is statistical and the second is systematic. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

    DOI: 10.1016/j.physletb.2015.12.025

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  • Study of pi(0) pair production in single-tag two-photon collisions 査読

    M. Masuda, S. Uehara, Y. Watanabe, H. Nakazawa, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, J. Dingfelder, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, F. Giordano, R. Glattauer, Y. M. Goh, P. Goldenzweig, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, D. H. Lee, I. S. Lee, C. Li, L. Li, Y. Li, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, J. Rauch, E. Ribezl, M. Ritter, A. Rostomyan, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Sumihama, T. Sumiyoshi, U. Tamponi, K. Tanida, Y. Teramoto, T. Uglov, Y. Unno, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, K. M. Williams, E. Won, J. Yamaoka, Y. Yamashita, S. Yashchenko, H. Ye, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 3 )   032003-1 - 032003-34   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the differential cross section of pi(0) pair production in single-tag two-photon collisions, gamma*gamma -&gt; pi(0) pi(0), in e(+) e(-) scattering. The cross section is measured for Q(2) up to 30 GeV2, where Q(2) is the negative of the invariant mass squared of the tagged photon, in the kinematic range 0.5 GeV &lt; W &lt; 2.1 GeV and vertical bar cos theta*vertical bar &lt; 1.0 for the total energy and pion scattering angle, respectively, in the gamma*gamma center-of-mass system. The results are based on a data sample of 759 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. The transition form factor of the f(0)(980) and that of the f(2)(1270) with the helicity-0, -1, and -2 components separately are measured for the first time and are compared with theoretical calculations.

    DOI: 10.1103/PhysRevD.93.032003

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  • Measurement of the lepton forward-backward asymmetry in B -&gt; X(s)l(+)l(-) decays with a sum of exclusive modes 査読

    Y. Sato, A. Ishikawa, H. Yamamoto, A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, I. -S. Cho, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, K. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, E. Kato, Y. Kato, H. Kawai, T. Kawasaki, H. Kichimi, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Lee, Y. Li, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, P. Lukin, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, R. Mussa, M. Nakao, Z. Natkaniec, M. Nayak, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, P. Pakhlov, H. Park, H. K. Park, T. K. Pedlar, T. Peng, R. Pestotnik, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, M. Roehrken, A. Rostomyan, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, R. Seidl, D. Semmler, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, V. Vorobyev, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, J. Yamaoka, Y. Yamashita, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 3 )   032008-1 - 032008-11   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first measurement of the lepton forward-backward asymmetry A(FB) as a function of the squared four-momentum of the dilepton system, q(2), for the electroweak penguin process B -&gt; X(s)l(+)l(-) with a sum of exclusive final states, where l is an electron or a muon and X-s is a hadronic recoil system with an s quark. The results are based on a data sample containing 772 x 10(6) B (B) over bar pairs recorded at the gamma (4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. A(FB) for the inclusive B -&gt; X(s)l(+)l(-) is extrapolated from the sum of 10 exclusive X-s states whose invariant mass is less than 2 GeV/c(2). For q(2) &gt; 10.2 GeV2/c(2), A(FB) &lt; 0 is excluded at the 2.3 sigma level, where sigma is the standard deviation. For q(2) &lt; 4.3 GeV2/c(2), the result is within 1.8 sigma of the standard model theoretical expectation.

    DOI: 10.1103/PhysRevD.93.032008

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  • First observation of the decay B-0 -&gt; psi(2S)pi(0) 査読

    V. Chobanova, J. Dalseno, C. Kiesling, A. Abdesselam, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, E. Barberio, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, R. Chistov, K. Cho, Y. Choi, D. Cinabro, N. Dash, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, O. Grzymkowska, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, Y. Iwasaki, I. Jaegle, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, E. Kato, P. Katrenko, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, I. S. Lee, H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, E. Nedelkovska, N. K. Nisar, S. Nishida, S. Ogawa, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, J. Rauch, E. Ribezl, M. Ritter, S. Ryu, H. Sahoo, Y. Sakai, S. Sandilya, T. Sanuki, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, J. B. Singh, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, J. Stypula, M. Sumihama, K. Sumisawa, T. Sumiyoshi, U. Tamponi, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, H. Ye, J. Yelton, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 3 )   031101-1 - 031101-7   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the B-0 -&gt; psi(2S)pi(0) branching fraction based on the full Upsilon(4S) data set of 772 x 10(6) B (B) over bar pairs collected by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We obtain B(B-0 -&gt; psi(2S)pi(0)) = (1.17 +/- 0.17(stat) +/- 0.08(syst)) x 10(-5). The result has a significance of 7.2 standard deviations and is the first observation of the decay B-0 -&gt; psi(2S)pi(0).

    DOI: 10.1103/PhysRevD.93.031101

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  • Study of B-0 -&gt; rho(+)rho(-) decays and implications for the CKM angle phi(2) 査読

    P. Vanhoefer, J. Dalseno, C. Kiesling, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, H. Atmacan, T. Aushev, T. Aziz, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, M. Danilov, N. Dash, J. Dingfelder, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, D. Greenwald, J. Haba, P. Hamer, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, T. Horiguchi, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, P. Katrenko, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, I. S. Lee, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, T. Mori, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, E. Ribezl, M. Ritter, A. Rostomyan, H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Sumihama, T. Sumiyoshi, U. Tamponi, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, G. Varner, A. Vinokurova, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Won, H. Yamamoto, J. Yamaoka, S. Yashchenko, H. Ye, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 3 )   032010-1 - 032010-20   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the branching fraction and the longitudinal polarization fraction of B-0 -&gt; rho(+)rho(-) decays, as well as the time-dependent CP violating parameters in decays into longitudinally polarized rho(+)rho(-) pairs with Belle's final data set of 772 x 10(6) B (B) over bar pairs, at the Upsilon(4S) resonance, collected at the asymmetric-energy e(+)e(-) collider KEKB. We obtain B(B-0 -&gt; rho(+)rho(-)) = (28.3 +/- 1.5(stat) +/- 1.5(syst)) x 10(-6), f(L) = 0.988 +/- 0.012(stat) +/- 0.023(syst), A(CP) = 0.00 +/- 0.10(stat) +/- 0.06(syst), S-CP = -0.13 +/- 0.15(stat) +/- 0.05(syst). We perform an isospin analysis to constrain the Cabibbo-Kobayashi-Maskawa angle phi(2) and obtain two solutions with phi(2) = (93.7 +/- 10.6)degrees, being most compatible with other Standard-Model based fits to the data.

    DOI: 10.1103/PhysRevD.93.032010

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  • Search for B-0 -&gt; pi(-)tau(+)nu(tau) with hadronic tagging at Belle 査読

    P. Hamer, A. Frey, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, B. Bhuyan, J. Biswal, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, I. Danko, N. Dash, J. Dingfelder, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, Y. M. Goh, P. Goldenzweig, B. Golob, D. Greenwald, J. Haba, T. Hara, J. Hasenbusch, K. Hayasaka, H. Hayashii, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, D. H. Lee, I. S. Lee, H. Li, L. Li, Y. Li, J. Libby, Y. Liu, D. Liventsev, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, C. Oswald, P. Pakhlov, G. Pakhlova, B. Pal, H. Park, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, J. Rauch, E. Ribezl, M. Ritter, A. Rostomyan, H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, J. Stypula, T. Sumiyoshi, Y. Teramoto, K. Trabelsi, V. Trusov, M. Uchida, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, A. Vossen, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, E. Won, H. Yamamoto, J. Yamaoka, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 3 )   032007-1 - 032007-10   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We search for the process B-0 -&gt; pi(-) tau(+)nu(tau) using the full Belle data set of 711 fb(-1), corresponding to 772 x 10(6)B (B) over bar pairs, collected at the gamma (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We reconstruct one B meson in a hadronic decay and search for the B-0 -&gt; pi(-)tau(+)nu(tau) process in the remainder of the event. No significant signal is observed and an upper limit of B(B-0 -&gt; pi(-) tau(+)nu(tau)) &lt; 2.5 x 10(-4) is obtained at the 90% confidence level.

    DOI: 10.1103/PhysRevD.93.032007

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  • Measurements of the Upsilon(10860) and Upsilon(11020) resonances via sigma(e(+)e(-) -&gt; Upsilon(nS)pi(+)pi(-)) 査読

    D. Santel, K. Kinoshita, P. Chang, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, A. M. Bakich, V. Bansal, B. Bhuyan, A. Bobrov, A. Bondar, G. Bonvicini, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, J. Dingfelder, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, M. Goh, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, J. S. Lange, I. S. Lee, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, C. Oswald, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, E. Solovieva, M. Staric, M. Steder, U. Tamponi, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, M. N. Wagner, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, E. Won, J. Yamaoka, Y. -P. Yang, S. Yashchenko, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   93 ( 1 )   011101-1 - 011101-6   2016年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report new measurements of the total cross sections for e(+)e(-) -&gt; Upsilon(nS)pi(+)pi(-) (n = 1, 2, 3) and e(+)e(-) -&gt; b (b) over bar from a high-luminosity fine scan of the region root s = 10.63-11.05 GeV with the Belle detector. We observe that the Upsilon(nS)pi(+)pi(-) spectra have little or no nonresonant component and extract from them the masses and widths of Upsilon(10860) and Upsilon(11020) and their relative phase. We find M-10860 = (10891.1 +/- 3.2(-1.7)(+0.6)) MeV/c(2) and Gamma(10860) = (53.7(-5.6)(-5.4)(+7.1)(+1.3)) MeV and report first measurements M-11020 = (1098(-2.5)(-2.1)(+6.4)(+9.0)) MeV/c(2), Gamma(11020) = (61(-19)(-20)(+9)(+2)) MeV, and phi(11020) - phi 10860 = (-1.0 +/- 0.4(-0.1)(+1.4)) rad.

    DOI: 10.1103/PhysRevD.93.011101

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  • First observation of the decay B0 →ψ (2S)π0 査読

    V. Chobanova, J. Dalseno, J. Dalseno, C. Kiesling, A. Abdesselam, I. Adachi, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, I. Badhrees, S. Bahinipati, A. M. Bakich, E. Barberio, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bobrov, A. Bozek, M. Bračko, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, R. Chistov, K. Cho, Y. Choi, D. Cinabro, N. Dash, Z. DoleŽal, Z. Drásal, A. Drutskoy, S. Eidelman, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, N. Gabyshev, A. Garmash, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, B. Golob, O. Grzymkowska, J. Haba, J. Haba, T. Hara, T. Hara, K. Hayasaka, H. Hayashii, W. S. Hou, T. Iijima, T. Iijima, K. Inami, A. Ishikawa, Y. Iwasaki, I. Jaegle, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, E. Kato, P. Katrenko, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, S. Korpar, P. KriŽan, P. KriŽan, P. Krokovny, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, A. Kuzmin, Y. J. Kwon, I. S. Lee, H. Li, L. Li

    Physical Review D - Particles, Fields, Gravitation and Cosmology   93 ( 3 )   2015年12月

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    © 2016 American Physical Society. We report a measurement of the B0→ψ(2S)π0 branching fraction based on the full (4S) data set of 772×106 BB¯ pairs collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain B(B0→ψ(2S)π0)=(1.17±0.17(stat)±0.08(syst))×10-5. The result has a significance of 7.2 standard deviations and is the first observation of the decay B0→ψ(2S)π0.

    DOI: 10.1103/PhysRevD.93.031101

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  • Search for the rare decay D0 →γγ at Belle 査読

    N. K. Nisar, N. K. Nisar, G. B. Mohanty, K. Trabelsi, K. Trabelsi, T. Aziz, A. Abdesselam, I. Adachi, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, V. Aulchenko, T. Aushev, T. Aushev, R. Ayad, V. Babu, I. Badhrees, I. Badhrees, S. Bahinipati, E. Barberio, P. Behera, V. Bhardwaj, J. Biswal, A. Bobrov, A. Bobrov, A. Bozek, M. Bračko, M. Bračko, F. Breibeck, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, J. Dalseno, N. Dash, Z. DoleŽal, Z. Drásal, A. Drutskoy, A. Drutskoy, D. Dutta, S. Eidelman, S. Eidelman, H. Farhat, J. E. Fast, B. G. Fulsom, V. Gaur, A. Garmash, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, B. Golob, D. Greenwald, O. Grzymkowska, J. Haba, J. Haba, T. Hara, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. S. Hou, K. Inami, A. Ishikawa, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, S. Korpar, P. KriŽan, P. KriŽan, P. Krokovny, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita

    Physical Review D - Particles, Fields, Gravitation and Cosmology   93 ( 5 )   2015年12月

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    © 2016 American Physical Society. We search for the rare radiative decay D0→γγ using a data sample with an integrated luminosity of 832 fb-1 recorded by the Belle detector at the KEKB e+e- asymmetric-energy collider. We find no statistically significant signal and set an upper limit on the branching fraction of B(D0→γγ)&lt;8.5×10-7 at 90% confidence level. This is the most restrictive limit on the decay channel to date.

    DOI: 10.1103/PhysRevD.93.051102

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  • Inclusive cross sections for pairs of identified light charged hadrons and for single protons in e+e- at s =10.58 GeV 査読

    R. Seidl, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, N. Dash, J. Dingfelder, Z. DoleŽal, Z. Drásal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, F. Giordano, Y. M. Goh, P. Goldenzweig, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, D. Joffe, K. K. Joo, K. H. Kang, E. Kato, P. Katrenko, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, P. Kodyš, S. Korpar, P. KriŽan, P. Krokovny, A. Kuzmin, Y. J. Kwon, J. S. Lange, D. H. Lee, L. Li, L. Li Gioi, J. Libby, Y. Liu, D. Liventsev, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, S. Mohanty, A. Moll, H. K. Moon, T. Mori, R. Mussa, E. Nakano

    Physical Review D - Particles, Fields, Gravitation and Cosmology   92 ( 9 )   2015年11月

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    掲載種別:研究論文(学術雑誌)  

    © 2015 American Physical Society. We report the first double differential cross sections of two charged pions and kaons (e+e-→hhX) in electron-positron annihilation as a function of the fractional energies of the two hadrons for any charge and hadron combination. The dependence of these dihadron cross sections on the topology (same, opposite hemisphere or anywhere) is also studied with the help of the event shape variable thrust and its axis. The ratios of these dihadron cross sections for different charges and hadron combinations directly shed light on the contributing fragmentation functions. For example, we find that the ratio of same-sign pion pairs over opposite-sign pion pairs drops toward higher fractional energies where disfavored fragmentation is expected to be suppressed. These dihadron results are obtained from a 655 fb-1 data sample collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. Extending the previously published single-pion and single-kaon cross sections, single-proton (e+e-→pX) cross sections are extracted from a 159 fb-1 data subsample.

    DOI: 10.1103/PhysRevD.92.092007

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  • Inclusive cross sections for pairs of identified light charged hadrons and for single protons in e(+)e(-) at root s=10.58 GeV 査読

    R. Seidl, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, N. Dash, J. Dingfelder, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, F. Giordano, Y. M. Goh, P. Goldenzweig, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, D. Joffe, K. K. Joo, K. H. Kang, E. Kato, P. Katrenko, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, J. S. Lange, D. H. Lee, L. Li, L. Li Gioi, J. Libby, Y. Liu, D. Liventsev, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, S. Mohanty, A. Moll, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, C. Oswald, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Sumihama, K. Sumisawa, T. Sumiyoshi, U. Tamponi, Y. Teramoto, V. Trusov, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, J. Yelton, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov

    PHYSICAL REVIEW D   92 ( 9 )   092007-1 - 092007-25   2015年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first double differential cross sections of two charged pions and kaons (e(+)e(-) -&gt; hhX) in electron-positron annihilation as a function of the fractional energies of the two hadrons for any charge and hadron combination. The dependence of these dihadron cross sections on the topology (same, opposite hemisphere or anywhere) is also studied with the help of the event shape variable thrust and its axis. The ratios of these dihadron cross sections for different charges and hadron combinations directly shed light on the contributing fragmentation functions. For example, we find that the ratio of same-sign pion pairs over opposite-sign pion pairs drops toward higher fractional energies where disfavored fragmentation is expected to be suppressed. These dihadron results are obtained from a 655 fb(-1) data sample collected near the gamma (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Extending the previously published single-pion and single-kaon cross sections, single-proton (e(+)e(-) -&gt; pX) cross sections are extracted from a 159 fb(-1) data subsample.

    DOI: 10.1103/PhysRevD.92.092007

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  • Observation of B-0 -&gt; p(Lambda)over-barD(*)(-) 査読

    Y. -Y. Chang, M. -Z. Wang, A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, J. Dingfelder, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, P. Goldenzweig, D. Greenwald, O. Grzymkowska, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, D. Joffe, K. K. Joo, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, Y. -T. Lai, I. S. Lee, L. Li, Y. Li, J. Libby, D. Liventsev, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, T. Mori, E. Nakano, M. Nakao, T. Nanut, M. Nayak, S. Nishida, S. Ogawa, H. Ozaki, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, J. Rauch, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, I. S. Seong, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, Y. -S. Sohn, M. Staric, J. Stypula, M. Sumihama, K. Sumisawa, T. Sumiyoshi, U. Tamponi, K. Tanida, Y. Teramoto, T. Uglov, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, J. Yelton, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   115 ( 22 )   221803-1 - 221803-8   2015年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of the decays B-0 -&gt; p (Lambda) over barD(*)(-). The data sample of 711 fb(-1) used in this analysis corresponds to 772 x 10(6) B (B) over bar pairs, collected at the Upsilon(4S) resonance by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe 19.8 sigma and 10.8 sigma excesses of events for the two decay modes and measure the branching fractions of B-0 -&gt; p (Lambda) over barD(-) and B-0 -&gt; p (Lambda) over barD*(-) to be (25.1 +/- 2.6 +/- 3.5) x 10(-6) and (33.6 +/- 6.3 +/- 4.4) x 10(-6), respectively, where the first uncertainties are statistical and the second are systematic. These results are not compatible with the predictions based on the generalized factorization approach. In addition, a threshold enhancement in the dibaryon (p (Lambda) over bar) system is observed, consistent with that observed in similar B decays.

    DOI: 10.1103/PhysRevLett.115.221803

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  • Measurement of the branching ratio of B ¯ →d (∗)τ- ν ¯ τ relative to B ¯ →d (∗) - ν ¯ decays with hadronic tagging at Belle 査読

    M. Huschle, T. Kuhr, M. Heck, P. Goldenzweig, A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. DoleŽal, Z. Drásal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, A. Frey, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Grygier, P. Hamer, K. Hara, T. Hara, J. Hasenbusch, K. Hayasaka, H. Hayashii, X. H. He, M. Heider, A. Heller, T. Horiguchi, W. S. Hou, C. L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, P. Katrenko, T. Kawasaki, T. Keck, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, P. Kodyš, S. Korpar, P. KriŽan, P. Krokovny, T. Kumita

    Physical Review D - Particles, Fields, Gravitation and Cosmology   92 ( 7 )   2015年10月

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    掲載種別:研究論文(学術雑誌)  

    © 2015 American Physical Society. © 2015 American Physical Society. We report a measurement of the branching fraction ratios R(D(∗)) of B¯→D(∗)τ-ν¯τ relative to B¯→D(∗) -ν¯ (where =e or μ) using the full Belle data sample of 772×106BB¯ pairs collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured values are R(D)=0.375±0.064(stat)±0.026(syst) and R(D∗)=0.293±0.038(stat)±0.015(syst). The analysis uses hadronic reconstruction of the tag-side B meson and purely leptonic τ decays. The results are consistent with earlier measurements and do not show a significant deviation from the standard model prediction.

    DOI: 10.1103/PhysRevD.92.072014

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  • Study of B0 → ρ+ ρ- Decays and implications for the CKM angle φ 2 査読

    P. Vanhoefer, J. Dalseno, J. Dalseno, C. Kiesling, A. Abdesselam, I. Adachi, I. Adachi, H. Aihara, S. Al Said, S. Al Said, K. Arinstein, K. Arinstein, D. M. Asner, H. Atmacan, T. Aushev, T. Aziz, V. Babu, I. Badhrees, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, A. Bobrov, A. Bobrov, A. Bozek, M. Bračko, M. Bračko, T. E. Browder, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, M. Danilov, N. Dash, J. Dingfelder, Z. DoleŽal, Z. Drásal, D. Dutta, S. Eidelman, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, N. Gabyshev, A. Garmash, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, B. Golob, D. Greenwald, J. Haba, J. Haba, P. Hamer, T. Hara, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, T. Horiguchi, W. S. Hou, T. Iijima, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, P. Katrenko, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita

    Physical Review D - Particles, Fields, Gravitation and Cosmology   93 ( 3 )   2015年10月

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    © 2016 American Physical Society. We present a measurement of the branching fraction and the longitudinal polarization fraction of B0→ρ+ρ- decays, as well as the time-dependent CP violating parameters in decays into longitudinally polarized ρ+ρ- pairs with Belle&#039;s final data set of 772×106 BB¯ pairs, at the (4S) resonance, collected at the asymmetric-energy e+e- collider KEKB. We obtain B(B0→ρ+ρ-)=(28.3±1.5(stat)±1.5(syst))×10-6, fL=0.988±0.012(stat)±0.023(syst), ACP=0.00±0.10(stat)±0.06(syst), SCP=-0.13±0.15(stat)±0.05(syst). We perform an isospin analysis to constrain the Cabibbo-Kobayashi-Maskawa angle φ2 and obtain two solutions with φ2=(93.7±10.6)°, being most compatible with other Standard-Model based fits to the data.

    DOI: 10.1103/PhysRevD.93.032010

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  • Measurement of the branching ratio of (B)over-bar -&gt; D-(*())tau(-)(nu)over-bar(tau) relative to (B)over-bar -&gt; D(*)l(-)(nu)over-bar(l) decays with hadronic tagging at Belle 査読

    M. Huschle, T. Kuhr, M. Heck, P. Goldenzweig, A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, A. Frey, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Grygier, P. Hamer, K. Hara, T. Hara, J. Hasenbusch, K. Hayasaka, H. Hayashii, X. H. He, M. Heider, A. Heller, T. Horiguchi, W-S. Hou, C-L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, P. Katrenko, T. Kawasaki, T. Keck, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y-J. Kwon, I. S. Lee, C. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, K. R. Nakamura, E. Nakano, M. Nakao, T. Nanut, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, C. Oswald, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, E. Ribezl, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T-A. Shibata, J-G. Shiu, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Steder, J. Stypula, M. Sumihama, T. Sumiyoshi, U. Tamponi, Y. Teramoto, K. Trabelsi, V. Trusov, M. Uchida, T. Uglov, S. Uno, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M-Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, E. Won, H. Yamamoto, J. Yamaoka, S. Yashchenko, H. Ye, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   92 ( 7 )   072014-1 - 072014-14   2015年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the branching fraction ratios R(D)(()*()) of (B) over bar -&gt; D-(*())tau(-)(nu) over bar (tau) relative to (B) over bar -&gt; D-(*())l(-)(nu) over barl (where l = e or mu) using the full Belle data sample of 772 x 10(6)B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured values are R(D) = 0.375 +/- 0.064(stat) +/- 0.026(syst) and R(D*) = 0.293 +/- 0.038 (stat) +/- 0.015 (syst). The analysis uses hadronic reconstruction of the tag-side B meson and purely leptonic t decays. The results are consistent with earlier measurements and do not show a significant deviation from the standard model prediction.

    DOI: 10.1103/PhysRevD.92.072014

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  • Measurement of the branching fraction of B+ -&gt; tau(+)nu(tau) decays with the semileptonic tagging method 査読

    B. Kronenbitter, M. Heck, P. Goldenzweig, T. Kuhr, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, A. M. Bakich, V. Bansal, E. Barberio, V. Bhardwaj, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, J. Dingfelder, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, O. Frost, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, B. Golob, J. Grygier, K. Hayasaka, H. Hayashii, X. H. He, M. Heider, A. Heller, T. Horiguchi, M. Huschle, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, K. K. Joo, T. Julius, K. H. Kang, E. Kato, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, J. S. Lange, D. H. Lee, I. S. Lee, P. Lewis, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Okuno, S. L. Olsen, W. Ostrowicz, C. Oswald, P. Pakhlov, G. Pakhlova, H. Park, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, M. Schram, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov, M. Ziegler, A. Zupanc

    PHYSICAL REVIEW D   92 ( 5 )   051102-1 - 051102-8   2015年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the branching fraction of B+ -&gt; tau(+) nu(tau) decays using a data sample of 772 x 10(6) B (B) over bar pairs, collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We reconstruct the accompanying B meson in a semileptonic decay and detect the recoiling B candidate in the decay channel B+ -&gt; tau(+) nu(tau). We obtain a branching fraction of B(B+ -&gt; tau(+) nu(tau)) = [1.25 +/- 0.28(stat.) +/- 0.27(syst.)] x 10-(4). This result is in good agreement with previous measurements and the expectation from the calculation based on the Standard Model.

    DOI: 10.1103/PhysRevD.92.051102

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  • First Observation of CP Violation in (B)over-bar(0) -&gt; D(CP)((*))h(0) Decays by a Combined Time-Dependent Analysis of BABAR and Belle Data 査読

    A. Abdesselam, I. Adachi, A. Adametz, T. Adye, H. Ahmed, H. Aihara, S. Akar, M. S. Alam, J. Albert, S. Al Said, R. Andreassen, C. Angelini, F. Anulli, K. Arinstein, N. Arnaud, D. M. Asner, D. Aston, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, H. R. Band, Sw. Banerjee, E. Barberio, D. J. Bard, R. J. Barlow, G. Batignani, A. Beaulieu, M. Bellis, E. Ben-Haim, D. Bernard, F. U. Bernlochner, S. Bettarini, D. Bettoni, A. J. Bevan, V. Bhardwaj, B. Bhuyan, F. Bianchi, M. Biasini, J. Biswal, V. E. Blinov, P. C. Bloom, A. Bobrov, M. Bomben, A. Bondar, G. R. Bonneaud, G. Bonvicini, A. Bozek, C. Bozzi, M. Bracko, H. Briand, T. E. Browder, D. N. Brown, D. N. Brown, C. Buenger, P. R. Burchat, A. R. Buzykaev, R. Calabrese, A. Calcaterra, G. Calderini, M. Carpinelli, C. Cartaro, G. Casarosa, R. Cenci, D. Cervenkov, P. Chang, D. S. Chao, J. Chauveau, R. Cheaib, V. Chekelian, A. Chen, C. Chen, C. H. Cheng, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, H. H. F. Choi, S-K. Choi, M. Chrzaszcz, G. Cibinetto, D. Cinabro, J. Cochran, J. P. Coleman, R. Contri, M. R. Convery, G. Cowan, R. Cowan, L. Cremaldi, J. Dalseno, S. Dasu, M. Davier, C. L. Davis, F. De Mori, G. De Nardo, A. G. Denig, D. Derkach, R. de Sangro, B. Dey, F. Di Lodovico, J. Dingfelder, S. Dittrich, Z. Dolezal, J. Dorfan, Z. Drasal, A. Drutskoy, V. P. Druzhinin, G. P. Dubois-Felsmann, W. Dunwoodie, D. Dutta, M. Ebert, B. Echenard, S. Eidelman, G. Eigen, A. M. Eisner, S. Emery, J. A. Ernst, R. Faccini, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, F. Ferrarotto, F. Ferroni, R. C. Field, A. Filippi, G. Finocchiaro, E. Fioravanti, K. T. Flood, W. T. Ford, F. Forti, M. Franco Sevilla, M. Fritsch, J. R. Fry, B. G. Fulsom, E. Gabathuler, N. Gabyshev, D. Gamba, A. Garmash, J. W. Gary, I. Garzia, M. Gaspero, V. Gaur, A. Gaz, T. J. Gershon, D. Getzkow, R. Gillard, L. Li Gioi, M. A. Giorgi, R. Glattauer, R. Godang, Y. M. Goh, P. Goldenzweig, B. Golob, V. B. Golubev, R. Gorodeisky, W. Gradl, M. T. Graham, E. Grauges, K. Griessinger, A. V. Gritsan, G. Grosdidier, O. Gruenberg, N. Guttman, J. Haba, A. Hafner, B. Hamilton, T. Hara, P. F. Harrison, C. Hast, K. Hayasaka, H. Hayashii, C. Hearty, X. H. He, M. Hess, D. G. Hitlin, T. M. Hong, K. Honscheid, W-S. Hou, Y. B. Hsiung, Z. Huard, D. E. Hutchcroft, T. Iijima, G. Inguglia, W. R. Innes, A. Ishikawa, R. Itoh, Y. Iwasaki, J. M. Izen, I. Jaegle, A. Jawahery, C. P. Jessop, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, R. Kass, T. Kawasaki, L. T. Kerth, A. Khan, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, P. Kim, S. H. Kim, Y. J. Kim, G. J. King, K. Kinoshita, B. R. Ko, H. Koch, P. Kodys, Yu. G. Kolomensky, S. Korpar, D. Kovalskyi, R. Kowalewski, E. A. Kravchenko, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, A. Kuzmin, Y. -J. Kwon, H. M. Lacker, G. D. Lafferty, L. Lanceri, D. J. Lange, A. J. Lankford, T. E. Latham, T. Leddig, F. Le Diberder, D. H. Lee, I. S. Lee, M. J. Lee, J. P. Lees, D. W. G. S. Leith, Ph. Leruste, M. J. Lewczuk, P. Lewis, J. Libby, W. S. Lockman, O. Long, D. Lopes Pegna, J. M. LoSecco, X. C. Lou, T. Lueck, S. Luitz, P. Lukin, E. Luppi, A. Lusiani, V. Luth, A. M. Lutz, G. Lynch, D. B. MacFarlane, B. Malaescu, U. Mallik, E. Manoni, G. Marchiori, M. Margoni, S. Martellotti, F. Martinez-Vidal, M. Masuda, T. S. Mattison, D. Matvienko, J. A. McKenna, B. T. Meadows, K. Miyabayashi, T. S. Miyashita, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, M. R. Monge, H. K. Moon, M. Morandin, D. R. Muller, R. Mussa, E. Nakano, H. Nakazawa, M. Nakao, T. Nanut, M. Nayak, H. Neal, N. Neri, N. K. Nisar, S. Nishida, I. M. Nugent, B. Oberhof, J. Ocariz, S. Ogawa, S. Okuno, E. O. Olaiya, J. Olsen, P. Ongmongkolkul, G. Onorato, A. P. Onuchin, Y. Onuki, W. Ostrowicz, A. Oyanguren, G. Pakhlova, P. Pakhlov, A. Palano, B. Pal, F. Palombo, Y. Pan, W. Panduro Vazquez, E. Paoloni, C. W. Park, H. Park, S. Passaggio, P. M. Patel, C. Patrignani, P. Patteri, D. J. Payne, T. K. Pedlar, D. R. Peimer, I. M. Peruzzi, L. Pesantez, R. Pestotnik, M. Petric, M. Piccolo, L. Piemontese, L. E. Piilonen, A. Pilloni, G. Piredda, S. Playfer, V. Poireau, F. C. Porter, M. Posocco, V. Prasad, S. Prell, R. Prepost, E. M. T. Puccio, T. Pulliam, M. V. Purohit, B. G. Pushpawela, M. Rama, A. Randle-Conde, B. N. Ratcliff, G. Raven, E. Ribezl, J. D. Richman, J. L. Ritchie, G. Rizzo, D. A. Roberts, S. H. Robertson, M. Roehrken, J. M. Roney, A. Roodman, A. Rossi, A. Rostomyan, M. Rotondo, P. Roudeau, R. Sacco, Y. Sakai, S. Sandilya, L. Santelj, V. Santoro, T. Sanuki, Y. Sato, V. Savinov, R. H. Schindler, O. Schneider, G. Schnell, T. Schroeder, K. R. Schubert, B. A. Schumm, C. Schwanda, A. J. Schwartz, R. F. Schwitters, C. Sciacca, A. Seiden, S. J. Sekula, K. Senyo, O. Seon, S. I. Serednyakov, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T-A. Shibata, J-G. Shiu, M. Simard, G. Simi, F. Simon, F. Simonetto, Yu. I. Skovpen, A. J. S. Smith, J. G. Smith, A. Snyder, R. Y. So, R. J. Sobie, A. Soffer, Y. -S. Sohn, M. D. Sokoloff, A. Sokolov, E. P. Solodov, E. Solovieva, B. Spaan, S. M. Spanier, M. Staric, A. Stocchi, R. Stroili, B. Stugu, D. Su, M. K. Sullivan, M. Sumihama, K. Sumisawa, T. Sumiyoshi, D. J. Summers, L. Sun, U. Tamponi, P. Taras, N. Tasneem, Y. Teramoto, V. Tisserand, K. Yu. Todyshev, W. H. Toki, C. Touramanis, K. Trabelsi, T. Tsuboyama, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, U. Uwer, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, G. Vasseur, J. Va'vra, M. Verderi, A. Vinokurova, L. Vitale, V. Vorobyev, C. Voss, M. N. Wagner, S. R. Wagner, R. Waldi, J. J. Walsh, C. H. Wang, M-Z. Wang, P. Wang, Y. Watanabe, C. A. West, K. M. Williams, F. F. Wilson, J. R. Wilson, W. J. Wisniewski, E. Won, G. Wormser, D. M. Wright, S. L. Wu, H. W. Wulsin, H. Yamamoto, J. Yamaoka, S. Yashchenko, C. Z. Yuan, Y. Yusa, A. Zallo, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   115 ( 12 )   121604-1 - 121604-10   2015年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the time-dependent CP asymmetry of (B) over bar (0) -&gt; D(CP)((*))h(0) decays, where the light neutral hadron h(0) is a pi(0), eta , or omega meson, and the neutral D meson is reconstructed in the CP eigenstates K+K-, K-S(0)pi(0) or K-S(0)omega. The measurement is performed combining the final data samples collected at the Upsilon(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471 +/- 3) x 10(6) B (B) over bar pairs recorded by the BABAR detector and (772 +/- 11) x 10(6) B (B) over bar pairs recorded by the Belle detector. We measure the CP asymmetry parameters -eta S-f = +0.66 +/- 0.10(stat) +/- 0.06(syst) and C = -0.02 +/- 0.07(stat) +/- 0.03(syst). These results correspond to the first observation of CP violation in (B) over bar (0) -&gt; D(CP)((*))h(0) decays. The hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.

    DOI: 10.1103/PhysRevLett.115.121604

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  • First Observation of the Hadronic Transition Upsilon(4S) -&gt; eta h(b)(1P) and New Measurement of the h(b)(1P) and eta(b)(1S) Parameters 査読

    U. Tamponi, R. Mussa, A. Abdesselam, H. Aihara, K. Arinstein, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, E. Barberio, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, A. Chen, B. G. Cheon, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, M. T. Hedges, W-S. Hou, T. Iijima, K. Inami, A. Ishikawa, I. Jaegle, D. Joffe, T. Julius, E. Kato, P. Katrenko, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. H. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, J. S. Lange, P. Lewis, J. Libby, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, W. Ostrowicz, C. Oswald, G. Pakhlova, B. Pal, H. Park, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T-A. Shibata, J-G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y-S. Sohn, A. Sokolov, M. Staric, M. Steder, J. Stypula, K. Tanida, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, A. Vossen, M. N. Wagner, M-Z. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   115 ( 14 )   142001-1 - 142001-7   2015年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using a sample of 771.6 x 10(6) Upsilon Upsilon(4S) decays collected by the Belle experiment at the KEKB e(+)e(-) collider, we observe, for the first time, the transition Upsilon(4S) -&gt; eta h(b)(1P) with the branching fraction B[Upsilon(4S) -&gt; eta h(b)(1P)] = (2.18 +/- 0.11 +/- 0.18) x 10(-3) and we measure the h(b)(1P) mass M-hb(1P) = (9899.3 +/- 0.4 +/- 1.0) MeV/c(2), corresponding to the hyperfine (HF) splitting Delta M-HF(1P) = (0.6 +/- 0.4 +/- 1.0) MeV/c(2). Using the transition h(b)(1P) -&gt; gamma eta(b)(1S), we measure the eta(b)(1S) mass M-eta b(1S) = (9400.7 +/- 1.7 +/- 1.6) MeV/c(2), corresponding to Delta M-HF(1S) = (59.6 +/- 1.7 +/- 1.6) MeV/c(2), the eta(b)(1S) width Gamma(eta b)(1S) = (8(-5)(+6)+/- 5) MeV/c(2) and the branching fraction B[h(b)(1P) -&gt; gamma eta(b)(1S)] = (56 +/- 8 +/- 4)%.

    DOI: 10.1103/PhysRevLett.115.142001

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  • Erratum: Publisher's Note: Measurements of B → D ¯ Ds0∗+ (2317) decay rates and a search for isospin partners of the Ds0∗+ (2317) (Physical Review D - Particles, Fields, Gravitation and Cosmology (2015) 91 (092011)) 査読

    S. K. Choi, S. L. Olsen, A. Abdesselam, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, V. Bhardwaj, B. Bhuyan, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, T. Horiguchi, W. S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, T. Julius, K. H. Kang, E. Kato, P. Katrenko, T. Kawasaki, B. H. Kim, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. KriŽan, P. Krokovny, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, P. Lewis, H. Li, L. Li Gioi, J. Libby, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. K. Moon, T. Mori, R. Mussa

    Physical Review D - Particles, Fields, Gravitation and Cosmology   92 ( 3 )   2015年8月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.92.039905

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  • Measurements of B -&gt; (D)over-barD(s0)*(+) (2317) decay rates and a search for isospin partners of the D-s0*(+) (2317) (vol 91, 092011, 2015) 査読

    S-K. Choi, S. L. Olsen, A. Abdesselam, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, V. Bhardwaj, B. Bhuyan, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, T. Horiguchi, W-S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, T. Julius, K. H. Kang, E. Kato, P. Katrenko, T. Kawasaki, B. H. Kim, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y-J. Kwon, J. S. Lange, I. S. Lee, P. Lewis, H. Li, L. Li Gioi, J. Libby, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T-A. Shibata, J-G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y-S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, U. Tamponi, S. Tanaka, K. Tanida, Y. Teramoto, V. Trusov, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, M-Z. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, S. Yashchenko, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   92 ( 3 )   039905-1 - 039905-1   2015年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    DOI: 10.1103/PhysRevD.92.039905

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  • Measurement of e(+)e(-) -&gt; gamma chi(cJ) via initial state radiation at Belle 査読

    Y. L. Han, X. L. Wang, C. Z. Yuan, C. P. Shen, P. Wang, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, V. Babu, I. Badhrees, V. Bansal, V. Bhardwaj, J. Biswal, A. Bozek, M. Bracko, A. Chen, B. G. Cheon, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, Y. M. Goh, P. Goldenzweig, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, T. Horiguchi, W. -S. Hou, T. Iijima, A. Ishikawa, I. Jaegle, D. Joffe, K. K. Joo, H. Kichimi, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, P. Krizan, P. Krokovny, P. Lewis, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, W. Ostrowicz, P. Pakhlov, G. Pakhlova, B. Pal, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, E. Ribezl, M. Ritter, A. Rostomyan, H. Sahoo, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Steder, M. Sumihama, U. Tamponi, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vossen, M. N. Wagner, Y. Watanabe, K. M. Williams, S. Yashchenko, Y. Yook, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   92 ( 1 )   012011-1 - 012011-9   2015年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The process e(+)e(-) -&gt; gamma chi(cJ) (J = 1, 2) is studied via initial state radiation using 980 fb(-1) of data at and around the Gamma(nS) (n = 1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetricenergy e(+)e(-) collider. No significant signal is observed except from psi(2S) decays. Upper limits on the cross sections between root s = 3.80 and 5.56 GeV are determined at the 90% credibility level, which range from a few pb to a few tens of pb. We also set upper limits on the decay rate of the vector charmonium [psi(4040), psi(4160), and psi(4415)] and charmoniumlike [Y(4260), Y(4360), and Y(4660)] states to gamma chi(cJ).

    DOI: 10.1103/PhysRevD.92.012011

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  • Study of D** production and light hadronic states in the (B)over-bar(0) -&gt; D*(+)omega pi(-) decay 査読

    D. Matvienko, A. Kuzmin, S. Eidelman, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, J. Dingfelder, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, T. Iijima, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, T. Kawasaki, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, B. R. Ko, P. Kodys, S. Korpar, P. Krokovny, R. Kumar, J. S. Lange, D. H. Lee, L. Li Gioi, J. Libby, D. Liventsev, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, R. Mussa, E. Nakano, M. Nakao, T. Nanut, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, E. Ribezl, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, M. Staric, M. Steder, M. Sumihama, K. Sumisawa, U. Tamponi, K. Tanida, Y. Teramoto, M. Uchida, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   92 ( 1 )   012013-1 - 012013-28   2015年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report on the first observations of (B) over bar (0) -&gt; D-1 (2430)(0)omega, (B) over bar (0) -&gt; D-1 (2420)(0)omega, and (B) over bar (0) -&gt; D-2* (2460)(0)omega decays. The (B) over bar (0) -&gt; D*(+) rho(1450)(-) decay is also observed. The branching fraction measurements are based on (771.6 +/- 10.6) x 10(6) B (B) over bar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The fractions of longitudinal polarization of the D** states as well as partial wave fractions of the D-1 (2430)(0) are obtained. We also set a 90% confidence level upper limit for the product of branching fractions of B((B) over bar (0) -&gt; D*(+)b(1) (1235)(-)) x B(b(1) (1235)(-) -&gt; omega pi(-)). The measurements show evidence of nontrivial final-state interaction phases for the rho-meson-like amplitudes.

    DOI: 10.1103/PhysRevD.92.012013

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  • Evidence for the decay B-0 -&gt; eta pi(0) 査読

    B. Pal, A. J. Schwartz, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, M. -C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, O. Frost, B. G. Fulsom, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, O. Grzymkowska, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, M. Huschle, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, T. Julius, K. H. Kang, E. Kato, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, D. H. Lee, I. S. Lee, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, H. Miyata, G. B. Mohanty, A. Moll, H. K. Moon, K. R. Nakamura, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar, L. Pesantez, M. Petric, L. E. Piilonen, C. Pulvermacher, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, Y. Sato, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, A. Sibidanov, F. Simon, Y. -S. Sohn, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, K. Sumisawa, T. Sumiyoshi, U. Tamponi, Y. Teramoto, F. Thorne, M. Uchida, S. Uehara, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, H. Yamamoto, J. Yamaoka, S. Yashchenko, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   92 ( 1 )   011101-1 - 011101-7   2015年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a search for the charmless hadronic decay B-0 -&gt; eta pi(0) with a data sample corresponding to an integrated luminosity of 694 fb(-1) containing 753 x 10(6) BB pairs. The data were collected by the Belle experiment running on the Upsilon(4S) resonance at the KEKB e(+)e(-) collider. We measure a branching fraction B(B-0 &gt; eta pi(0)) = (4.1(-1.5-0.7)(+1.75+0.5)) x 10(-7), where the first unceminty is statistical and the second is systematic. Our measurement gives an upper limit of beta(B-0 -&gt; n pi(0)) &lt; 6.5 x 10(-7) at 90% confidence level. The signal has a significance of 3.0 standard deviations and constitutes the first evidence for this decay mode.

    DOI: 10.1103/PhysRevD.92.011101

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  • Search for B decays to final states with the η<inf>c</inf> meson 査読

    A. Vinokurova, A. Kuzmin, S. Eidelman, A. Abdesselam, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, A. M. Bakich, V. Bansal, V. Bhardwaj, B. Bhuyan, A. Bobrov, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, V. Chekelian, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, J. Dingfelder, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, W. S. Hou, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, D. Joffe, T. Julius, K. H. Kang, E. Kato, C. Kiesling, D. Y. Kim, H. J. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, Y. J. Kwon, J. S. Lange, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, G. B. Mohanty, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, C. Ng, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar

    Journal of High Energy Physics   2015 ( 6 )   2015年6月

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    掲載種別:研究論文(学術雑誌)  

    © 2015, The Author(s). Abstract: We report a search for B decays to selected final states with the ηc meson: B± → K±ηcπ+π−, B± → K±ηcω, B± → K±ηcη and B± → K±ηcπ0. The analysis is based on 772 × 106BB¯$$ B\overline{B} $$ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. We set 90% confidence level upper limits on the branching fractions of the studied B decay modes, independent of intermediate resonances, in the range (0.6–5.3) × 10−4. We also search for molecular-state candidates in the (Formula presented.) and (Formula presented.) combinations, neutral partners of the Z(3900)± and Z(4020)±, and a poorly understood state X(3915) as possible intermediate states in the decay chain, and set 90% confidence level upper limits on the product of branching fractions to the mentioned intermediate states and decay branching fractions of these states in the range (0.6–6.9) × 10−5.

    DOI: 10.1007/JHEP06(2015)132

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  • Measurement of e+e- →γχcJ via initial state radiation at Belle 査読

    Y. L. Han, X. L. Wang, C. Z. Yuan, C. P. Shen, P. Wang, A. Abdesselam, I. Adachi, I. Adachi, H. Aihara, S. Al Said, S. Al Said, D. M. Asner, T. Aushev, T. Aushev, V. Babu, I. Badhrees, I. Badhrees, V. Bansal, V. Bhardwaj, J. Biswal, A. Bozek, M. Bračko, M. Bračko, A. Chen, B. G. Cheon, R. Chistov, K. Cho, V. Chobanova, S. K. Choi, D. Cinabro, J. Dalseno, J. Dalseno, M. Danilov, M. Danilov, Z. DoleŽal, A. Drutskoy, A. Drutskoy, D. Dutta, S. Eidelman, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, N. Gabyshev, A. Garmash, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, Y. M. Goh, P. Goldenzweig, B. Golob, B. Golob, J. Haba, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, T. Horiguchi, W. S. Hou, T. Iijima, T. Iijima, A. Ishikawa, I. Jaegle, D. Joffe, K. K. Joo, H. Kichimi, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, P. KriŽan, P. KriŽan, P. Krokovny, P. Krokovny, P. Lewis, L. Li Gioi, J. Libby, D. Liventsev, D. Liventsev, P. Lukin, P. Lukin, M. Masuda, D. Matvienko, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, R. Mizuk, A. Moll, A. Moll, H. K. Moon

    Physical Review D - Particles, Fields, Gravitation and Cosmology   92 ( 1 )   2015年6月

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    掲載種別:研究論文(学術雑誌)  

    © 2015 American Physical Society. The process e+e-→γχcJ (J=1, 2) is studied via initial state radiation using 980fb-1 of data at and around the (nS) (n=1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No significant signal is observed except from ψ(2S) decays. Upper limits on the cross sections between s=3.80 and 5.56 GeV are determined at the 90% credibility level, which range from a few pb to a few tens of pb. We also set upper limits on the decay rate of the vector charmonium [ψ(4040), ψ(4160), and ψ(4415)] and charmoniumlike [Y(4260), Y(4360), and Y(4660)] states to γχcJ.

    DOI: 10.1103/PhysRevD.92.012011

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  • Measurement of e(+)e(-) -&gt; pi(+)pi(-)psi(2S) via initial state radiation at Belle 査読

    X. L. Wang, C. Z. Yuan, C. P. Shen, P. Wang, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, R. Ayad, A. M. Bakich, V. Bansal, B. Bhuyan, A. Bobrov, G. Bonvicini, M. Bracko, T. E. Browder, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, K. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, A. Garmash, D. Getzkow, R. Gillard, Y. M. Goh, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, D. Joffe, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, P. Lewis, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, V. Shebalin, T. -A. Shibata, J. -G. Shiu, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, M. N. Wagner, Y. Watanabe, E. Won, S. Yashchenko, Y. Yusa, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   91 ( 11 )   112007-1 - 112007-15   2015年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurement of the cross section of e(+)e(-) -&gt; pi(+)pi(-)psi(2S) between 4.0 and 5.5 GeV, based on an analysis of initial state radiation events in a 980 fb(-1) data sample recorded with the Belle detector. The properties of the Y(4360) and Y(4660) states are determined. Fitting the mass spectrum of pi(+)pi(-)psi(2S) with two coherent Breit-Wigner functions, we find two solutions with identical mass and width but different couplings to electron-positron pairs: M-Y(4360) = (4347 +/- 6 +/- 3) MeV/c(2), Gamma(Y(4360)) = (103 +/- 9 +/- 5) MeV, M-Y(4660) = (4652 +/- 10 +/- 8) MeV/c(2), Gamma(Y(4660)) = (68 +/- 11 +/- 1) MeV; and B[Y(4360) -&gt; pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4360)) = (10.9 +/- 0.6 +/- 0.7) eV and B[Y(4660) -&gt; pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4660)) = (8.1 +/- 1.1 +/- 0.5) eV for one solution; or B[Y(4360) -&gt; pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4360)) = (9.2 +/- 0.6 +/- 0.6) eV and B[Y(4660) -&gt; pi(+)pi(-)psi(2S)] . Gamma(e+e-)(Y(4660)) = (2.0 +/- 0.3 +/- 0.2) eV for the other. Here, the first errors are statistical and the second systematic. Evidence for a charged charmoniumlike structure at 4.05 GeV/c(2) is observed in the pi(+/-)psi(2S) intermediate state in the Y(4360) decays.

    DOI: 10.1103/PhysRevD.91.112007

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  • Search for B+ -&gt; l(+)nu(l)gamma decays with hadronic tagging using the full Belle data sample 査読

    A. Heller, P. Goldenzweig, M. Heck, T. Kuhr, A. Zupanc, A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, A. Chen, B. G. Cheon, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Grygier, J. Haba, K. Hayasaka, X. H. He, M. Heider, T. Horiguchi, W. -S. Hou, M. Huschle, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, E. Kato, P. Katrenko, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, P. Lewis, J. Libby, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, C. Oswald, G. Pakhlova, B. Pal, H. Park, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, M. Staric, M. Steder, J. Stypula, U. Tamponi, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, A. Vossen, M. N. Wagner, M. -Z. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, Y. Yamashita, S. Yashchenko, Z. P. Zhang, V. Zhilich

    PHYSICAL REVIEW D   91 ( 11 )   112009-1 - 112009-11   2015年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We search for the decay B+ -&gt; l(+)nu(l)gamma with l(+) = e(+) or mu(+) using the full Belle data set of 772 x 10(6) B (B) over bar pairs, collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We reconstruct one B meson in a hadronic decay mode and search for the B+ -&gt; l(+)nu(l)gamma decay in the remainder of the event. We observe no significant signal within the phase space of E-gamma(sig) &gt; 1 GeV and obtain upper limits of B(B+ -&gt; e(+)nu(e)gamma) &lt; 6.1 x 10(-6), B(B+ -&gt; mu(+)nu(mu)gamma) &lt; 3.4 x 10(-6), and B(B+ -&gt; l(+)nu(l)gamma) &lt; 3.5 x 10(-6) at 90% credibility level.

    DOI: 10.1103/PhysRevD.91.112009

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  • Search for B decays to final states with the η<inf>c</inf> meson 査読

    Vinokurova A, Kuzmin A, Eidelman S, Abdesselam A, Adachi I, Aihara H, Arinstein K, Asner D.M, Aushev T, Ayad R, Bakich A.M, Bansal V, Bhardwaj V, Bhuyan B, Bobrov A, Bondar A, Bozek A, Bra?ko M, Browder T.E, Chekelian V, Cheon B.G, Chilikin K, Chistov R, Cho K, Choi S.-K, Choi Y, Cinabro D, Dingfelder J, Dole?al Z, Dr{\'a}sal Z, Drutskoy A, Dutta D, Epifanov D, Farhat H, Fast J.E, Ferber T, Gaur V, Gabyshev N, Garmash A, Gillard R, Goh Y.M, Golob B, Haba J, Hayasaka K, Hayashii H, He X.H, Hou W.-S, Inami K, Ishikawa A, Itoh R, Iwasaki Y, Joffe D, Julius T, Kang K.H, Kato E, Kiesling C, Kim D.Y, Kim H.J, Kim J.H, Kim K.T, Kim M.J, Kim S.H, Kim Y.J, Kinoshita K, Ko B.R, Kody? P, Korpar S, Kri?an P, Krokovny P, Kuhr T, Kumita T, Kwon Y.-J, Lange J.S, Gioi L.L, Libby J, Liventsev D, Lukin P, Matvienko D, Miyabayashi K, Miyake H, Miyata H, Mohanty G.B, Moll A, Mori T, Mussa R, Nakano E, Nakao M, Natkaniec Z, Ng C, Nisar N.K, Nishida S, Ogawa S, Okuno S, Olsen S.L, Pakhlov P, Pakhlova G, Park C.W, Park H, Pedlar T.K, Pestotnik R, Petri? M, Piilonen L.E, Ribe?l E, Ritter M, Rostomyan A, Sakai Y, Sandilya S, Santel D, Santelj L, Sanuki T, Sato Y, Savinov V, Schneider O, Schnell G, Schwanda C, Semmler D, Senyo K, Seon O, Sevior M.E, Shebalin V, Shen C.P, Shibata T.-A, Shiu J.-G, Shwartz B, Sibidanov A, Simon F, Sohn Y.-S, Sokolov A, Solovieva E, Stani? S, Stari? M, Steder M, Sumihama M, Sumiyoshi T, Tamponi U, Tatishvili G, Teramoto Y, Uchida M, Uglov T, Unno Y, Uno S, Van Hulse C, Vanhoefer P, Varner G, Vorobyev V, Wagner M.N, Wang C.H, Wang M.-Z, Wang P, Watanabe Y, Williams K.M, Won E, Yamaoka J, Yashchenko S, Yook Y, Zhang Z.P, Zhulanov V, Zupanc A

    Journal of High Energy Physics   2015 ( 6 )   2015年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1007/JHEP06(2015)132

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Study of D∗∗ production and light hadronic states in the B ¯ 0 →d∗+ωπ- decay STUDY of D∗∗ PRODUCTION and LIGHT ⋯ D. MATVIENKO et al. 査読

    D. Matvienko, D. Matvienko, A. Kuzmin, A. Kuzmin, S. Eidelman, S. Eidelman, A. Abdesselam, I. Adachi, I. Adachi, H. Aihara, S. Al Said, S. Al Said, K. Arinstein, K. Arinstein, D. M. Asner, V. Aulchenko, V. Aulchenko, T. Aushev, T. Aushev, R. Ayad, V. Babu, I. Badhrees, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bobrov, A. Bondar, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, J. Dalseno, J. Dingfelder, Z. DoleŽal, Z. Drásal, A. Drutskoy, A. Drutskoy, D. Dutta, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, N. Gabyshev, A. Garmash, A. Garmash, D. Getzkow, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, B. Golob, T. Hara, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. S. Hou, T. Iijima, T. Iijima, G. Inguglia, A. Ishikawa, R. Itoh, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, T. Kawasaki, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, B. R. Ko, P. Kodyš, S. Korpar

    Physical Review D - Particles, Fields, Gravitation and Cosmology   92 ( 1 )   2015年5月

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    © 2015 American Physical Society. We report on the first observations of B¯0→D1(2430)0ω, B¯0→D1(2420)0ω, and B¯0→D2∗(2460)0ω decays. The B¯0→D∗+ρ(1450)- decay is also observed. The branching fraction measurements are based on (771.6±10.6)×106 BB¯ events collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The fractions of longitudinal polarization of the D∗∗ states as well as partial wave fractions of the D1(2430)0 are obtained. We also set a 90% confidence level upper limit for the product of branching fractions of B(B¯0→D∗+b1(1235)-)×B(b1(1235)-→ωπ-). The measurements show evidence of nontrivial final-state interaction phases for the ρ-meson-like amplitudes.

    DOI: 10.1103/PhysRevD.92.012013

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  • Search for the Dark Photon and the Dark Higgs Boson at Belle 査読

    I. Jaegle, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, A. M. Bakich, V. Bansal, M. Barrett, B. Bhuyan, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, M. -C. Chang, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, O. Frost, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, D. Getzkow, R. Gillard, Y. M. Goh, B. Golob, O. Grzymkowska, K. Hayasaka, H. Hayashii, X. H. He, M. Hedges, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, Y. Iwasaki, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, D. Y. Kim, J. B. Kim, J. H. Kim, S. H. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, P. Lewis, L. Li Gioi, J. Libby, D. Liventsev, D. Matvienko, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, R. Mussa, E. Nakano, M. Nakao, N. K. Nisar, S. Nishida, S. Ogawa, P. Pakhlov, G. Pakhlova, H. Park, T. K. Pedlar, L. Pesantez, M. Petric, L. E. Piilonen, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, I. Seong, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, R. Sinha, Y. -S. Sohn, M. Staric, M. Sumihama, K. Sumisawa, U. Tamponi, G. Tatishvili, Y. Teramoto, F. Thorne, M. Uchida, S. Uehara, Y. Unno, S. Uno, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, Y. Yook, Y. Yusa, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   114 ( 21 )   211801-1 - 211801-8   2015年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The dark photon A' and the dark Higgs boson h' are hypothetical constituents featured in a number of recently proposed dark sector models. Assuming prompt decays of both dark particles, we search for their production in the so-called Higgstrahlung channel e(+)e(-) -&gt; A'h', with h' -&gt; A'A'. We investigate ten exclusive final states with A' -&gt; e(+)e(-), mu(+)mu(-), or pi(+)pi(-) in the mass ranges 0.1 GeV/c(2) &lt; m(A') &lt; 3.5 GeV/c(2) and 0.2 GeV/c(2) &lt; m(h') &lt; 10.5 GeV/c(2). We also investigate three inclusive final states 2(e(+)e(-))X, 2(mu(+)mu(-))X, and (e(+)e(-))(mu(+)mu(-))X, where X denotes a dark photon candidate detected via missing mass, in the mass ranges 1.1 GeV/c(2) &lt; m(A') &lt; 3.5 GeV/c(2) and 2.2 GeV/c(2) &lt; m(h') &lt; 10.5 GeV/c(2). Using the entire 977 fb(-1) data set collected by Belle, we observe no significant signal. We obtain individual and combined 90% credibility level upper limits on the branching fraction times the Born cross section, B x sigma(Born), on the Born cross section sigma(Born), and on the dark photon coupling to the dark Higgs boson times the kinetic mixing between the standard model photon and the dark photon, alpha(D) x epsilon(2). These limits improve upon and cover wider mass ranges than previous experiments. The limits from the final states 3(pi(+)pi(-)) and 2(e(+)e(-))X are the first placed by any experiment. For alpha(D) equal to 1/137, m(h') &lt; 8 GeV/c(2), and m(A') &lt; 1 GeV/c(2), we exclude values of the mixing parameter epsilon above similar to 8 x 10(-4).

    DOI: 10.1103/PhysRevLett.114.211801

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  • Measurements of B → D ¯ Ds0∗+ (2317) decay rates and a search for isospin partners of the Ds0∗+ (2317) 査読

    Choi S.-K, Olsen S.L, Abdesselam A, Adachi I, Aihara H, Arinstein K, Asner D.M, Aushev T, Ayad R, Babu V, Badhrees I, Bakich A.M, Barberio E, Bhardwaj V, Bhuyan B, Bonvicini G, Bozek A, Bra?ko M, Browder T.E, ?ervenkov D, Chen A, Cheon B.G, Chilikin K, Chistov R, Cho K, Chobanova V, Choi Y, Cinabro D, Dalseno J, Danilov M, Dole?al Z, Dr{\'a}sal Z, Drutskoy A, Dutta D, Eidelman S, Farhat H, Fast J.E, Ferber T, Fulsom B.G, Gaur V, Gabyshev N, Garmash A, Getzkow D, Gillard R, Glattauer R, Goh Y.M, Golob B, Haba J, Hara T, Hayasaka K, Hayashii H, He X.H, Horiguchi T, Hou W.-S, Iijima T, Inami K, Inguglia G, Ishikawa A, Itoh R, Iwasaki Y, Jaegle I, Joffe D, Julius T, Kang K.H, Kato E, Katrenko P, Kawasaki T, Kim B.H, Kim D.Y, Kim H.J, Kim J.B, Kim J.H, Kim K.T, Kim S.H, Kim Y.J, Kinoshita K, Ko B.R, Kody? P, Korpar S, Kri?an P, Krokovny P, Kumita T, Kuzmin A, Kwon Y.-J, Lange J.S, Lee I.S, Lewis P, Li H, Li Gioi L, Libby J, Lukin P, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty G.B, Moll A, Moon H.K, Mori T, Mussa R, Nakano E, Nakao M, Nanut T, Natkaniec Z, Nayak M, Nisar N.K, Nishida S, Ogawa S, Okuno S, Pakhlov P, Pakhlova G, Pal B, Park C.W, Park H, Pedlar T.K, Pes{\'a}ntez L, Pestotnik R, Petri? M, Piilonen L.E, Ribe?l E, Ritter M, Rostomyan A, Ryu S, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schneider O, Schnell G, Schwanda C, Senyo K, Sevior M.E, Shapkin M, Shebalin V, Shen C.P, Shibata T.-A, Shiu J.-G, Shwartz B, Sibidanov A, Simon F, Sohn Y.-S, Sokolov A, Solovieva E, Stari? M, Steder M, Tamponi U, Tanaka S, Tanida K, Teramoto Y, Trusov V, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Van Hulse C, Vanhoefer P, Varner G, Vinokurova A, Vorobyev V, Vossen A, Wagner M.N, Wang C.H, Wang M.-Z, Wang X.L, Watanabe Y, Williams K.M, Won E, Yashchenko S, Zhang Z.P, Zhilich V, Zhulanov V, Zupanc A

    Physical Review D - Particles, Fields, Gravitation and Cosmology   91 ( 9 )   2015年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.91.092011

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Search for the decay B+ -&gt; (K)over-bar*K-0*(+) at Belle 査読

    Y. M. Goh, Y. Unno, B. G. Cheon, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Bansal, E. Barberio, B. Bhuyan, A. Bozek, M. Bracko, T. E. Browder, A. Chen, V. Chobanova, Y. Choi, D. Cinabro, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, T. Ferber, V. Gaur, A. Garmash, R. Gillard, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, M. Huschle, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, T. Julius, K. H. Kang, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, Y. -J. Kwon, J. S. Lange, I. S. Lee, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, K. Matsuoka, D. Matvienko, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, T. Nanut, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, W. Ostrowicz, G. Pakhlova, C. W. Park, H. Park, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, R. Sinha, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Sumihama, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, V. Trusov, M. Uchida, S. Uno, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, K. M. Williams, E. Won, S. Yashchenko, Y. Yusa, Z. P. Zhang, V. Zhilich

    PHYSICAL REVIEW D   91 ( 7 )   071101-1 - 071101-8   2015年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a search for the rare charmless decay B+ -&gt; (K) over bar*K-0*(+) using a data sample of 772 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No statistically significant signal is found and a 90% confidence- level upper limit is set on the decay branching fraction of B(B+ -&gt; (K) over bar*K-0*(+)) &lt; 1.31 x 10(-6).

    DOI: 10.1103/PhysRevD.91.071101

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  • Amplitude analysis of e(+)e(-) -&gt; Upsilon(nS)pi(+)pi(-) at root s=10.866 GeV 査読

    A. Garmash, A. Bondar, A. Kuzmin, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, A. M. Bakich, A. Bala, V. Bhardwaj, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, Z. Dolezal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, A. Frey, O. Frost, V. Gaur, S. Ganguly, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, E. Kato, P. Katrenko, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, Y. -J. Kwon, S. -H. Lee, Y. Li, L. Li Gioi, J. Libby, C. Liu, Z. Q. Liu, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Okuno, S. L. Olsen, W. Ostrowicz, P. Pakhlov, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, T. Saito, Y. Sakai, S. Sandilya, D. Santel, T. Sanuki, Y. Sato, O. Schneider, G. Schnell, A. J. Schwartz, D. Semmler, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   91 ( 7 )   072003-1 - 072003-16   2015年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report results on studies of the e(+)e(-) annihilation into three-body Upsilon(nS)pi(+)pi(-) (n = 1, 2, 3) final states including measurements of cross sections and the full amplitude analysis. The cross sections measured at root s = 10.866 GeV and corrected for the initial state radiation are sigma(e(+)e(-) --&gt; Upsilon(1S)pi(+)pi(-)) = (2.27 +/- 0.12 +/- 0.14) pb, sigma(e(+)e(-) --&gt; Upsilon(2S)pi(+)pi(-)) = (4.07 +/- 0.16 +/- 0.45) pb, and sigma(e(+)e(-) --&gt; Upsilon(3S)pi(+)pi(-)) = (1.46 +/- 0.09 +/- 0.16) pb. Amplitude analysis of the three-body Upsilon(nS)pi(+)pi(-) final states strongly favors I-G(J(P)) = 1(+)(1(+)) quantum-number assignments for the two bottomonium-like Z(b)(+/-) states, recently observed in the Upsilon(nS)pi(+) and h(b)(mP)pi(+)(m = 1, 2) decay channels. The results are obtained with a 121.4 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.91.072003

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  • Measurement of the (B)over-bar -&gt; X-s gamma branching fraction with a sum of exclusive decays 査読

    T. Saito, A. Ishikawa, H. Yamamoto, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, A. M. Bakich, V. Bansal, B. Bhuyan, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, J. Dingfelder, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, D. Getzkow, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, J. Hasenbusch, K. Hayasaka, H. Hayashii, X. H. He, T. Higuchi, T. Horiguchi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, B. Kronenbitter, T. Kuhr, Y. -J. Kwon, J. S. Lange, I. S. Lee, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, T. Nanut, Z. Natkaniec, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, C. Oswald, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, E. Solovieva, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   91 ( 5 )   052004-1 - 052004-13   2015年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We use 772 x 10(6) B (B) over bar meson pairs collected at the gamma(4S) resonance with the Belle detector to measure the branching fraction for (B) over bar -&gt; X-s gamma Our measurement uses a sum-of-exclusives approach in which 38 of the hadronic final states with strangeness equal to +1, denoted by X-s, are reconstructed. The inclusive branching fraction for M-Xs &lt; 2.8 GeV/c(2), which corresponds to a minimum photon energy of 1.9 GeV, is measured to be B(&lt;(B)over bar&gt; -&gt; X-s gamma) = (3.51 +/- 0.17 +/- 0.33) x 10(-4), where the first uncertainty is statistical and the second is systematic.

    DOI: 10.1103/PhysRevD.91.052004

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  • Search for B+ -&gt; e(+)nu(e) and B+ -&gt; mu(+)nu(mu) decays using hadronic tagging 査読

    Y. Yook, Y. -J. Kwon, A. Abdesselam, I. Adachi, S. Al Said, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, S. Bahinipati, A. M. Bakich, A. Bala, V. Bansal, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, K. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, O. Frost, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, O. Grzymkowska, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, X. H. He, M. Heck, T. Higuchi, Y. Horii, Y. Hoshi, W. -S. Hou, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, E. Kato, P. Katrenko, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, J. S. Lange, Y. Li, L. Li Gioi, C. Liu, Y. Liu, D. Liventsev, P. Lukin, K. Miyabayashi, H. Miyata, G. B. Mohanty, A. Moll, R. Mussa, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, P. Pakhlov, C. -S. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, M. Sumihama, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, S. Wehle, K. M. Williams, E. Won, Y. Yamashita, S. Yashchenko, Y. Yusa, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   91 ( 5 )   052016-1 - 052016-8   2015年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a search for the rare leptonic decays B+ -&gt; e(+)nu(e) and B+ -&gt; mu(+) nu(mu) using the full Upsilon(4S) data sample of 772 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. One of the B mesons from the Upsilon(4S) -&gt; B (B) over bar decay is fully reconstructed in a hadronic mode, while the recoiling side is analyzed for the signal decay. We find no evidence of a signal in any of the decay modes. Upper limits of the corresponding branching fractions are determined as beta(B+ -&gt; e(+)nu(e)) &lt; 3.5 x 10(-6) and beta(B+ -&gt; mu(+)nu(mu)) &lt; 2.7 x 10(-6) at 90% confidence level.

    DOI: 10.1103/PhysRevD.91.052016

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  • Measurement of B-0 -&gt; (Ds-KS0)pi(+) and B+ -&gt; Ds-K+K+ branching fractions 査読

    J. Wiechczynski, J. Stypula, A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, A. M. Bakich, V. Bansal, V. Bhardwaj, B. Bhuyan, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, B. G. Cheon, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, J. Dingfelder, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, O. Frost, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, D. Getzkow, R. Gillard, Y. M. Goh, O. Grzymkowska, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, M. Huschle, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, H. Kichimi, D. Y. Kim, J. B. Kim, J. H. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, R. Mussa, M. Nakao, T. Nanut, Z. Natkaniec, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, E. Solovieva, M. Staric, M. Steder, M. Sumihama, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, F. Thorne, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   91 ( 3 )   032008-1 - 032008-9   2015年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the B-0 and B+ meson decays to the (Ds-KS0)pi(+) and Ds-K+K+ final states, respectively, using 657 x 10(6)B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Using the D-s(-) -&gt; phi pi(-), K*(892)K-0(-) and (KSK-)-K-0 decay modes for the D-s reconstruction, we measure the following branching fractions: B(B-0 -&gt; (Ds-KS0)pi(+))= [0.47 +/- 0.06(stat) +/- 0.05(syst)] x 10(-4) and B(B+ -&gt; Ds-K+K+)= [0.93 +/- 0.22(stat) +/- 0.10(syst)] x 10(-5). We find the ratio of the branching fraction of B+ -&gt; Ds-K+K+ to that of the analogous Cabibbo-favored B+ -&gt; Ds-K+pi(+) decay to be R-B= 0.054 +/- 0.013(stat) +/- 0.006(syst), which is consistent with the naive factorization model. We also observe a deviation of the DsK invariant-mass distribution from the three-body phase-space model for both studied decays.

    DOI: 10.1103/PhysRevD.91.032008

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  • Monitoring system for the belle II distributed computing 査読

    Kiyoshi Hayasaka

    Journal of Physics: Conference Series   664 ( 6 )   2015年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:Institute of Physics Publishing  

    Belle II experiment is a next-generation B-factory at KEK in Japan, which will collect 50 ab-1 data sample for 10 years, that corresponds to about 5 x 1010 BB-pair events. To handle such a huge data sample, Belle II has adopted the distributed computing. A monitoring system is necessary to operate the computing system stably and we have been developing the monitoring system for Belle II computing based on our experience we have gained through the mass production test of the Monte Carlo simulation events. In this paper, we introduce our monitoring system, especially, the one we call "active-way" monitoring.

    DOI: 10.1088/1742-6596/664/6/062020

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  • Job monitoring on DIRAC for Belle II distributed computing 査読

    Yuji Kato, Kiyoshi Hayasaka, Takanori Hara, Hideki Miyake, Ikuo Ueda

    Journal of Physics: Conference Series   664 ( 6 )   2015年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:Institute of Physics Publishing  

    We developed a monitoring system for Belle II distributed computing, which consists of active and passive methods. In this paper we describe the passive monitoring system, where information stored in the DIRAC database is processed and visualized. We divide the DIRAC workload management flow into steps and store characteristic variables which indicate issues. These variables are chosen carefully based on our experiences, then visualized. As a result, we are able to effectively detect issues. Finally, we discuss the future development for automating log analysis, notification of issues, and disabling problematic sites.

    DOI: 10.1088/1742-6596/664/6/062023

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  • Overview and Highlights of the Belle II Computing 査読

    Yuji Kato, Kiyoshi Hayasaka, the Belle II computing group

    PoS   FPCP2015   092   2015年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)  

    DOI: 10.22323/1.248.0092

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  • Evidence of (1S) →j /ψ+χc1 and search for double-charmonium production in (1S) and (2S) decays 査読

    S. D. Yang, C. P. Shen, Y. Ban, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, A. M. Bakich, V. Bansal, P. Behera, B. Bhuyan, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, J. Dingfelder, Z. DoleŽal, Z. Drásal, A. Drutskoy, K. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. S. Hou, M. Huschle, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, I. Jaegle, D. Joffe, K. K. Joo, T. Julius, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. KriŽan, P. Krokovny, A. Kuzmin, Y. J. Kwon, J. S. Lange, J. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, K. Miyabayashi, H. Miyata, A. Moll, R. Mussa, E. Nakano, M. Nakao, T. Nanut, N. K. Nisar, S. Nishida, S. Okuno, W. Ostrowicz, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik

    Physical Review D - Particles, Fields, Gravitation and Cosmology   90 ( 11 )   112008-1 - 112008-9   2014年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    © 2014 American Physical Society. Using data samples of 102×106 (1S) and 158×106 (2S) events collected with the Belle detector, a first experimental search has been made for double-charmonium production in the exclusive decays (1S,2S)→J/ψ(ψ′)+X, where X=ηc, χcJ(J=0,1,2), ηc(2S), X(3940), and X(4160). No significant signal is observed in the spectra of the mass recoiling against the reconstructed J/ψ or ψ′ except for the evidence of χc1 production with a significance of 4.6σ for (1S)→J/ψ+χc1. The measured branching fraction B((1S)→J/ψ+χc1) is [3.90±1.21(stat)±0.23(syst)]×10-6. The 90% C.L. upper limits on the branching fractions of the other modes having a significance of less than 3σ are determined. These results are consistent with theoretical calculations using the nonrelativistic QCD factorization approach.

    DOI: 10.1103/PhysRevD.90.112008

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  • Evidence of (1S) →j /ψ+χc1 and search for double-charmonium production in (1S) and (2S) decays 査読

    Yang S.D, Shen C.P, Ban Y, Abdesselam A, Adachi I, Aihara H, Al Said S, Arinstein K, Asner D.M, Aulchenko V, Aushev T, Ayad R, Bakich A.M, Bansal V, Behera P, Bhuyan B, Bobrov A, Bozek A, Bra?ko M, Browder T.E, ?ervenkov D, Chekelian V, Chen A, Cheon B.G, Chilikin K, Chistov R, Cho K, Chobanova V, Choi S.-K, Choi Y, Cinabro D, Dalseno J, Danilov M, Dingfelder J, Dole?al Z, Dr{\'a}sal Z, Drutskoy A, Dutta K, Eidelman S, Farhat H, Fast J.E, Ferber T, Gaur V, Gabyshev N, Ganguly S, Garmash A, Gillard R, Goh Y.M, Golob B, Haba J, Hara T, Hayasaka K, Hayashii H, He X.H, Hou W.-S, Huschle M, Iijima T, Inami K, Ishikawa A, Itoh R, Jaegle I, Joffe D, Joo K.K, Julius T, Kawasaki T, Kim D.Y, Kim H.J, Kim J.B, Kim J.H, Kim K.T, Kinoshita K, Ko B.R, Kody? P, Korpar S, Kri?an P, Krokovny P, Kuzmin A, Kwon Y.-J, Lange J.S, Li J, Li Y, Li Gioi L, Libby J, Liventsev D, Lukin P, Miyabayashi K, Miyata H, Moll A, Mussa R, Nakano E, Nakao M, Nanut T, Nisar N.K, Nishida S, Okuno S, Ostrowicz W, Park C.W, Park H, Pedlar T.K, Pestotnik R, Petri? M, Piilonen L.E, Ribe?l E, Ritter M, Rostomyan A, Sakai Y, Sandilya S, Santelj L, Sanuki T, Schneider O, Schnell G, Schwanda C, Semmler D, Senyo K, Shebalin V, Shibata T.-A, Shiu J.-G, Shwartz B, Sibidanov A, Simon F, Sohn Y.-S, Sokolov A, Stari? M, Steder M, Sumiyoshi T, Tamponi U, Tanida K, Tatishvili G, Teramoto Y, Uchida M, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Vahsen S.E, Van Hulse C, Vanhoefer P, Varner G, Vinokurova A, Vorobyev V, Vossen A, Wagner M.N, Wang C.H, Wang M.-Z, Wang P, Wang X.L, Watanabe M, Watanabe Y, Won E, Yamaoka J, Yashchenko S, Yook Y, Yuan C.Z, Zhang Z.P, Zhilich V, Zhulanov V

    Physical Review D - Particles, Fields, Gravitation and Cosmology   90 ( 11 )   2014年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.90.112008

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Observation of a new charged charmoniumlike state in B-0 -&gt; J/psi K- pi(+) decays 査読

    K. Chilikin, R. Mizuk, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, T. Aziz, A. M. Bakich, V. Bansal, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, K. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, O. Frost, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, O. Grzymkowska, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, M. Huschle, H. J. Hyun, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, K. K. Joo, T. Julius, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, Y. Li, L. Li Gioi, J. Libby, Y. Liu, D. Liventsev, P. Lukin, K. Miyabayashi, H. Miyata, G. B. Mohanty, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, E. Nedelkovska, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar, M. Petric, L. E. Piilonen, E. Ribezl, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, O. Seon, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, K. Sumisawa, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, F. Thorne, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, S. Wehle, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   90 ( 11 )   112009-1 - 112009-14   2014年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present the results of an amplitude analysis of B-0 --&gt; J/psi K- pi(+) decays. A new charged charmoniumlike state Z(c)(4200)(+) decaying to J/psi pi(+) is observed with a significance of 6.2 sigma. The mass and width of the Z(c)(4200)(+) are 4196(-29-13)(+31+17) MeV/c(2) and 370(-70-132)(+70+70) MeV, respectively; the preferred assignment of the quantum numbers is J(P) = 1(+). In addition, we find evidence for Z(c)(4430)(+) --&gt; J/psi pi(+). The analysis is based on a 711 fb(-1) data sample collected by the Belle detector at the asymmetric-energy e(+)e(-) collider KEKB.

    DOI: 10.1103/PhysRevD.90.112009

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  • Measurement of the inclusive semileptonic branching fraction B(B-s(0) -&gt; X(-)l(+)nu(l)) at Belle (vol 87, 072008, 2013) 査読

    C. Oswald, P. Urquijo, J. Dingfelder, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, K. Belous, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, P. Chang, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, S. Esen, H. Farhat, J. E. Fast, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, D. H. Kah, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, S. Korpar, R. T. Kouzes, P. Krizan, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, Y. -J. Kwon, S. -H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, O. Lutz, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, Y. Nagasaka, E. Nakano, M. Nakao, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Prim, K. Prothmann, M. Ritter, M. Roehrken, M. Rozanska, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   90 ( 11 )   119901   2014年12月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    DOI: 10.1103/PhysRevD.90.119901

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  • HFAG tau lepton averages 査読

    Alberto Lusiani, Kiyoshi Hayasaka, Hisaki Hayashii, J. Michael Roney, Boris Shwartz, Swagato Banerjee

    Nuclear Physics B - Proceedings Supplements   253-255   47 - 51   2014年10月

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    掲載種別:研究論文(国際会議プロシーディングス)  

    © 2014 Elsevier B.V. The HFAG-Tau group has computed the world averages of the tau lepton properties using the experimental results available in early 2012. The tau lepton branching fractions, mass and lifetime are used to test lepton universality for charged weak currents and to compute |Vus|. For the first time, all |Vus| measurements based primarily on tau data have been combined in a single measurement. Searches for lepton flavor violating decays of the tau lepton are also summarized.

    DOI: 10.1016/j.nuclphysbps.2014.09.012

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  • Observation of the decay B-0 -&gt; eta ' K* (892)(0) 査読

    S. Sato, Y. Yusa, G. B. Mohanty, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, S. Bahinipati, A. M. Bakich, V. Bansal, V. Bhardwaj, B. Bhuyan, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, O. Frost, V. Gaur, S. Ganguly, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, O. Grzymkowska, K. Hayasaka, H. Hayashii, X. H. He, T. Higuchi, W. -S. Hou, M. Huschle, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, K. K. Joo, T. Julius, E. Kato, T. Kawasaki, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, Y. -J. Kwon, J. Li, Y. Li, J. Libby, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, E. Nedelkovska, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, H. Park, T. K. Pedlar, M. Petric, L. E. Piilonen, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, J. Stypula, M. Sumihama, U. Tamponi, G. Tatishvili, Y. Teramoto, F. Thorne, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, S. Wehle, K. M. Williams, E. Won, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   90 ( 7 )   072009-1 - 072009-7   2014年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a search for charmless hadronic decays of neutral B mesons to eta ' K* (892)(0). The results are based on a 711 fb(-1) data sample that contains 772 x 10(6) B (B) over bar pairs, collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. We observe the decay for the first time with a significance of 5.0 standard deviations and obtain its branching fraction B[B-0 -&gt; eta ' K* (892)(0)] = [2.6 +/- 0.7(stat) +/- 0.2(syst)] x 10(-6). We also measure the CP-violating asymmetry as A(CP) [B-0 -&gt; eta ' K* (892)(0)] = -0.22 +/- 0.29(stat) +/- 0.07(syst).

    DOI: 10.1103/PhysRevD.90.072009

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  • Measurement of time-dependent CP violation in B-0 - eta ' K-0 decays 査読

    L. Santelj, Y. Yusa, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, S. Bahinipati, A. M. Bakich, V. Bansalu, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. T. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, O. Frost, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, X. H. He, T. Higuchi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, K. K. Joo, H. Kakuno, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, G. B. Mohanty, A. Moll, T. Mori, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, E. Nedelkovska, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, E. Ribezl, M. Rutter, A. Rostomyan, Y. Sakai, S. Sandilya, T. Sanuki, Y. Sato, V. Savinov, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, M. Sumihama, U. Tamponi, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, S. Wehle, K. M. Williams, E. Won, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    JOURNAL OF HIGH ENERGY PHYSICS   ( 10 )   165   2014年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER  

    We present a measurement of the time-dependent CP violation parameters in B0 -&gt; eta'K-0 decays. The measurement is based on the full data sample containing 772 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance using the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured values of the mixing-induced and direct CP violation parameters are:
    sin 2 phi(eff)(1) = +0.68 +/- 0.07 +/- 0.03,
    A(eta'K0) = +0.03 +/- 0.05 +/- 0.04,
    where the first uncertainty is statistical arid the second is systernatic. The values obtained are the most accurate to date. lurthierrimore. these results are consistent with our previous measurements and with the world-average value of sin 2 phi(1) measured in B-0 -&gt; J/psi K-0 decays.

    DOI: 10.1007/JHEP10(2014)165

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  • Observation of e(+)e(-) -&gt; pi(+)pi(-) pi(0)chi(bJ) and Search for X-b -&gt; omega Upsilon(1S) at root s=10.867 GeV 査読

    X. H. He, C. P. Shen, C. Z. Yuan, Y. Ban, A. Abdesselam, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, S. Bahinipati, A. M. Bakich, V. Bansal, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, O. Grzymkowska, J. Haba, K. Hayasaka, H. Hayashii, W. -S. Hou, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, K. K. Joo, T. Julius, E. Kato, T. Kawasaki, D. Y. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, Y. Li, J. Libby, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, T. Nanut, Z. Natkaniec, E. Nedelkovska, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, M. E. Sevior, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, K. Sumisawa, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, F. Thorne, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, S. Wehle, K. M. Williams, E. Won, J. Yamaoka, S. Yashchenko, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   113 ( 14 )   142001-1 - 142001-7   2014年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The e(+)e(-) -&gt; pi(+)pi(-) pi(0)chi(bj) ( J = 0, 1, 2) processes are studied using a 118 fb(-1) data sample acquired with the Belle detector at a center-of-mass energy of 10.867 GeV. Unambiguous pi(+)pi(-) pi(0)chi(bj) ( J = 1, 2), omega chi(b1) signals are observed, and indication for omega chi(b2) is seen, both for the first time, and the corresponding cross section measurements are presented. No significant pi(+)pi(-) pi(0)chi(b0) or omega chi(b0) signals are observed, and 90% confidence level upper limits on the cross sections for these two processes are obtained. In the pi(+)pi(-) pi(0) invariant mass spectrum, significant non-omega signals are also observed. We search for the X(3872)-like state (named X-b) decaying into omega Upsilon(1S); no significant signal is observed with a mass between 10.55 and 10.65 GeV= c(2).

    DOI: 10.1103/PhysRevLett.113.142001

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  • Measurement of branching fractions and CP violation parameters in B -&gt; omega K decays with first evidence of CP violation in B-0 -&gt; omega K-s(0) 査読

    V. Chobanova, J. Dalseno, C. Kiesling, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, A. Bala, Y. Ban, K. Belous, B. Bhuyan, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, Y. Choi, D. Cinabro, M. Danilov, Z. Dolezal, Z. Drasal, D. Dutta, K. Dutta, S. Eidelman, S. Esen, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, X. H. He, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, E. Kato, H. Kawai, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, A. Kuzmin, J. S. Lange, S. -H. Lee, J. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, E. Nedelkovska, C. Ng, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, T. Peng, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, T. Peng, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, H. Sahoo, T. Saito, Y. Sakai, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, A. J. Schwartz, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, S. Stanic, M. Staric, M. Steder, K. Sumisawa, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, S. Yashchenko, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   90 ( 1 )   012002-1 - 012002-16   2014年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the branching fractions and charge- parity-( CP-) violating parameters in B..K decays. The results are obtained from the final data sample containing 772 x 10(6) BB _ pairs collected at the.d4S_ resonance with the Belle detector at the KEKB asymmetric- energy e_e- collider. We obtain the branching fractions BdB0 0 _d4.5 0.4dstat_ 0.3dsyst_x10- 6; BdB_..K__ d6.80.4dstat_ 0.4dsyst__x10- 6 which are in agreement with their respective current world averages. For the CP- violating parameters, we obtain A.K0 S - 0.36 +/- 0.19dstat_ 0.05dsyst_; S.K0 S _0.91 0.32dstat_ 0.05dsyst_; A.K_ - 0.03 +/- 0.04dstat_ 0.01dsyst_; where A and S represent the direct and mixing- induced CP asymmetry, respectively. We find no evidence of CP violation in the decay channel B_..K_; however, we obtain the first evidence of CP violation in the B0..K0 S decay channel at the level of 3.1 standard deviations.

    DOI: 10.1103/PhysRevD.90.012002

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  • Measurement of the Branching Fraction B(Lambda(+)(c) -&gt; pK(-)pi(+)) 査読

    A. Zupanc, C. Bartel, N. Gabyshev, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bala, K. Belous, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, M. -C. Chang, V. Chekelian, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, D. Dutta, K. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, V. Gaur, S. Ganguly, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, Y. Hoshi, W. -S. Hou, M. Huschle, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, E. Kato, Y. Kato, T. Kawasaki, H. Kichimi, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, J. MacNaughton, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, M. Nayak, E. Nedelkovska, M. Niiyama, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. L. Olsen, W. Ostrowicz, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov

    PHYSICAL REVIEW LETTERS   113 ( 4 )   042002-1 - 042002-7   2014年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present the first model-independent measurement of the absolute branching fraction of the Lambda(+)(c) -&gt; pK(-)pi(+)decay using a data sample of 978 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The number of Lambda(+)(c) baryons is determined by reconstructing the recoiling D(*)(-)(p) over bar pi(+)system in events of the type e(+)e(-) -&gt; D(*)(-)(p) over bar pi(+)Lambda(+)(c). The branching fraction is measured to be B(Lambda(+)(c) -&gt; pK(-)pi(+)) = (6.84 +/- 0.24(-0.27)(+0.21))%, where the first and second uncertainties are statistical and systematic, respectively.

    DOI: 10.1103/PhysRevLett.113.042002

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  • Study of B-0 -&gt; rho(0)rho(0) decays, implications for the CKM angle phi(2) and search for other B-0 decay modes with a four-pion final state (vol 89, 072008, 2014) 査読

    P. Vanhoefer, J. Dalseno, C. Kiesling, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, Z. Dolezal, Z. Drasal, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, T. Hara, K. Hayasaka, H. Hayashii, T. Higuchi, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, D. H. Kah, E. Kato, H. Kawai, T. Kawasaki, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, L. Li Gioi, J. Libby, C. Liu, Y. Liu, D. Liventsev, P. Lukin, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. -G. Moser, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, Y. Unno, S. Uno, S. E. Vahsen, C. Van Hulse, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, Y. Yamashita, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   89 ( 11 )   119903   2014年6月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    DOI: 10.1103/PhysRevD.89.119903

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  • Measurement of ${D}^{0}\text{ { - } }{\overline{D } }^{0}$ mixing and search for indirect $CP$ violation using ${D}^{0}{\rightarrow}{K}_{S}^{0}{ { \pi } }^{+}{ { \pi } }^{ { - } }$ decays 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   89 ( 9 )   091103-1 - 091103-8   2014年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.89.091103

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  • Measurement of branching fractions for B → J/ψηK decays and search for a narrow resonance in the J/ψη final state 査読

    Iwashita T, Miyabayashi K, Bhardwaj V, Adachi I, Aihara H, Asner D.M, Aushev T, Bakich A.M, Bala A, Bhuyan B, Bonvicini G, Bozek A, Bra?ko M, Browder T.E, Chang M.-C, Chen A, Cheon B.G, Chilikin K, Chistov R, Cho K, Chobanova V, Choi S.-K, Choi Y, Cinabro D, Dalseno J, Danilov M, Dole?al Z, Dr{\'a}sal Z, Dutta D, Eidelman S, Esen S, Farhat H, Fast J.E, Feindt M, Ferber T, Frey A, Gaur V, Gabyshev N, Ganguly S, Gillard R, Goh Y.M, Golob B, Haba J, Hara T, Hayasaka K, Hayashii H, Higuchi T, Horii Y, Hoshi Y, Hou W.-S, Hyun H.J, Iijima T, Ishikawa A, Itoh R, Iwasaki Y, Jaegle I, Julius T, Kah D.H, Kang J.H, Kato E, Kawasaki T, Kichimi H, Kiesling C, Kim D.Y, Kim H.J, Kim H.O, Kim J.B, Kim J.H, Kim M.J, Kim Y.J, Kinoshita K, Klucar J, Ko B.R, Kody?s P, Korpar S, Kri?an P, Krokovny P, Kuhr T, Kumita T, Kuzmin A, Kwon Y.-J, Lange J.S, Lee S.-H, Li Y, Libby J, Liu C, Liu Y, Lukin P, Matvienko D, Miyata H, Mizuk R, Moll A, Mori T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nayak M, Ng C, Nisar N.K, Nishida S, Nitoh O, Ogawa S, Okuno S, Pakhlova G, Panzenb{\"o}ck E, Park H, Park H.K, Pedlar T.K, Pestotnik R, Petri? M, Piilonen L.E, Ritter M, R{\"o}hrken M, Rostomyan A, Ryu S, Sahoo H, Saito T, Sakai K, Sakai Y, Sandilya S, Santel D, Santelj L, Sanuki T, Savinov V, Schneider O, Schnell G, Schwanda C, Semmler D, Senyo K, Seon O, Sevior M.E, Shapkin M, Shen C.P, Shibata T.-A, Shiu J.-G, Shwartz B, Sibidanov A, Simon F, Sohn Y.-S, Sokolov A, Solovieva E, Stani? S, Stari? M, Steder M, Sumiyoshi T, Tamponi U, Tanida K, Tatishvili G, Teramoto Y, Trabelsi K, Tsuboyama T, Uchida M, Uehara S, Unno Y, Uno S, Urquijo P, Vanhoefer P, Varner G, Varvell K.E, Vorobyev V, Vossen A, Wagner M.N, Wang C.H, Wang M.-Z, Wang P, Wang X.L, Watanabe M, Watanabe Y, Williams K.M, Won E, Yabsley B.D, Yamashita Y, Yashchenko S, Yook Y, Yuan C.Z, Zhang Z.P, Zhilich V, Zupanc A

    Progress of Theoretical and Experimental Physics   2014 ( 4 )   2014年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1093/ptep/ptu043

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Updated cross section measurement of e(+)e(-)-&gt; K(+)K(-)J/Psi and K(s)(0)K(s)(0)J/Psi via initial state radiation at Belle 査読

    C. P. Shen, C. Z. Yuan, P. Wang, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, A. M. Bakich, A. Bala, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, A. Frey, V. Gaur, S. Ganguly, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, D. Joffe, T. Julius, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, S. -H. Lee, J. Li, L. Li Gioi, J. Libby, C. Liu, Z. Q. Liu, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, R. Mussa, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Okuno, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, T. Saito, Y. Sakai, T. Sanuki, Y. Sato, O. Schneider, G. Schnell, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, M. Uchida, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, M. N. Wagner, C. H. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, S. Yashchenko, Y. Yook, C. C. Zhang, Z. P. Zhang, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   89 ( 7 )   072015-1 - 072015-9   2014年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The cross sections of the processes e(+)e(-)-&gt; K(+)K(-)J/Psi and K(s)(0)K(s)(0)J/Psi are measured via initial state radiation at center-of-mass energies between the threshold and 6.0 GeV using a data sample of 980 fb(-1) collected with the Belle detector on or near the r(nS) resonances, where n=1,2,..5. The cross sections for e(+)e(-)-&gt; K(+)K(-)J/Psi are at a few pb level and the average cross section for K(s)(0)K(s)(0)J/Psi is 1.8 +/- 0.6 (stat)+/- 0.3(syst) pb between 4.4 and 5.2 GeV. All of them are consistent with previously published results with improved precision. A search for resonant structures and associated intermediate states in the cross section of the process e(+)e(-)-&gt; K(+)K(-)J/Psi is performed.

    DOI: 10.1103/PhysRevD.89.072015

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  • Measurements of branching fractions of tau lepton decays with one or more K-S(0) 査読

    S. Ryu, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bala, B. Bhuyan, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, J. Dalseno, Z. Dolezal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, T. Iwashita, T. Julius, E. Kato, C. Kiesling, B. H. Kim, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, B. R. Ko, P. Kodys, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, S. -H. Lee, J. Li, J. Libby, D. Liventsev, P. Lukin, J. MacNaughton, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, M. Nayak, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, H. Sahoo, T. Saito, Y. Sakai, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, O. Seon, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, M. Uchida, S. Uehara, Y. Unno, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, E. Won, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   89 ( 7 )   072009-1 - 072009-17   2014年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurements of branching fractions of tau lepton decays to final states with a K-S(0) meson using a 669 fb(-1) data sample accumulated with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The inclusive branching fraction is measured to be beta(tau(-) -&gt; (KSX-)-X-0 nu(tau)) = (9.15 +/- 0.01 +/- 0.15) X 10(-3), where X- can be anything; the exclusive branching fractions are beta(tau(-) -&gt; pi(-) K-S(0)nu(tau)) = (4.16 +/- 0.01 +/- 0.08) X 10(-3), beta(tau(-) -&gt; K- K-S(0)nu(tau)) = (7.40 +/- 0.07 +/- 0.27) X 10(-4), beta(tau(-) -&gt; pi(-) K-S(0)pi(0)nu(tau)) = (1.93 +/- 0.02 +/- 0.07) X 10(-3), beta(tau(-) -&gt; K- K-S(0)pi(0)nu(tau)) = (7.48 +/- 0.10 +/- 0.37) X 10(-4), beta(tau(-) -&gt; pi(-) (KSKS0)-K-0 nu(tau)) = (2.33 +/- 0.03 +/- 0.09) X 10(-4), beta(tau(-) -&gt; pi(-) (KSKS0)-K-0 pi(0)nu(tau)) = (2.00 +/- 0.22 +/- 0.20) X 10(-5), where the first uncertainty is statistical and the second is systematic. For each mode, the accuracy is improved over that of pre-B-factory measurements by a factor ranging from five to ten. In tau(-) -&gt; pi(-) (KSKS0)-K-0 pi(0)nu(tau) decays, clear signals for the intermediate states tau(-) -&gt; pi(-) f(1)(1285)nu(tau) and tau(-) -&gt; K*- K-S(0)pi(0)nu(tau) are observed.

    DOI: 10.1103/PhysRevD.89.072009

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  • Study of B-0 -&gt; rho(0)rho(0) decays, implications for the CKM angle phi(2) and search for other B-0 decay modes with a four-pion final state 査読

    P. Vanhoefer, J. Dalseno, C. Kiesling, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, Z. Dolezal, Z. Drasal, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, T. Hara, K. Hayasaka, H. Hayashii, T. Higuchi, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, D. H. Kah, E. Kato, H. Kawai, T. Kawasaki, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, L. Li Gioi, J. Libby, C. Liu, Y. Liu, D. Liventsev, P. Lukin, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. -G. Moser, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, Y. Unno, S. Uno, S. E. Vahsen, C. Van Hulse, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, Y. Yamashita, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   89 ( 7 )   072008-1 - 072008-16   2014年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a study of the branching fraction of the decay B-0 -&gt; rho(0)rho(0) and the fraction of longitudinally polarized rho(0) mesons in this decay. The results are obtained from the final data sample containing 772 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We find 166 +/- 59 B-0 -&gt; rho(0)rho(0) events (including systematic uncertainties), corresponding to a branching fraction of B(B-0 -&gt; rho(0)rho(0)) = (1.02 +/- 0.30(stat) +/- 0.15(syst)) x 10(-6) with a significance of 3.4 standard deviations and a longitudinal polarization fraction f(L) = 0.21(-0.22)(+0.18()stat) +/- 0.15(syst). We use the longitudinal polarization fraction to determine the Cabibbo-Kobayashi-Maskawa matrix angle phi(2) = (84.9 +/- 13.5)degrees through an isospin analysis in the B -&gt;rho rho system. We furthermore find 125 +/- 41 B-0 -&gt; f(0)rho(0) events, corresponding to B(B-0 -&gt; f(0)rho(0)) x B(f(0) -&gt; pi(+)pi(-)) = (0.78 +/- 0.22(stat) +/- 0.11(syst)) x 10(-6), with a significance of 3.1 standard deviations. We find no other significant contribution with the same final state, and set upper limits at 90% confidence level on the (product) branching fractions, B(B-0 -&gt; pi(+)pi(-)pi(+)pi(-)) &lt; 11.2 x 10(-6), B(B-0 -&gt; rho(0)pi(+)pi(-)) &lt; 12.0 x 10(-6), B(B-0 -&gt; f(0)pi(+)pi(-)) x B(f(0) -&gt; pi(+)pi(-)) &lt; 3.0 x 10(-6) and B(B-0 -&gt; f(0)f(0)) x B(f(0) -&gt; pi(+)pi(-))(2) &lt; 0.2 x 10(-6).

    DOI: 10.1103/PhysRevD.89.072008

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  • Search for doubly charmed baryons and study of charmed strange baryons at Belle 査読

    Y. Kato, T. Iijima, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, A. Bala, Y. Ban, V. Bhardwaj, B. Bhuyan, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. DoleŽal, Z. Drásal, A. Drutskoy, D. Dutta, K. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, K. Inami, A. Ishikawa, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, P. Krokovny, T. Kuhr, A. Kuzmin, Y. J. Kwon, S. H. Lee, J. Li, Y. Li, L. Li Gioi, J. Libby, Y. Liu, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, N. Muramatsu, R. Mussa, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, M. Nayak, E. Nedelkovska, C. Ng, M. Niiyama, N. K. Nisar, S. Nishida

    Physical Review D - Particles, Fields, Gravitation and Cosmology   89 ( 5 )   2014年3月

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    掲載種別:研究論文(学術雑誌)  

    We report results of a study of doubly charmed baryons and charmed strange baryons. The analysis is performed using a 980fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We search for doubly charmed baryons Ξcc+(+) with the Λc+K-π+(π+) and Ξc0π+(π+) final states. No significant signal is observed. We also search for two excited charmed strange baryons, Ξc(3055)+ and Ξc(3123)+ with the Σc++(2455)K- and Σc++(2520)K- final states. The Ξc(3055)+ signal is observed with a significance of 6.6 standard deviations including systematic uncertainty, while no signature of the Ξc(3123)+ is seen. We also study properties of the Ξc(2645)+ and measure a width of 2.6±0.2(stat)±0.4(syst)MeV/c2, which is the first significant determination. © 2014 American Physical Society.

    DOI: 10.1103/PhysRevD.89.052003

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  • Search for doubly charmed baryons and study of charmed strange baryons at Belle 査読

    Y. Kato, T. Iijima, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, A. Bala, Y. Ban, V. Bhardwaj, B. Bhuyan, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, K. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, Y. Horii, Y. Hoshi, W-S. Hou, Y. B. Hsiung, K. Inami, A. Ishikawa, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, S. -H. Lee, J. Li, Y. Li, L. Li Gioi, J. Libby, Y. Liu, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, N. Muramatsu, R. Mussa, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, M. Nayak, E. Nedelkovska, C. Ng, M. Niiyama, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, T. Peng, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Steder, M. Sumihama, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, Y. Yamashita, S. Yashchenko, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   89 ( 5 )   052003-1 - 052003-14   2014年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report results of a study of doubly charmed baryons and charmed strange baryons. The analysis is performed using a 980 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We search for doubly charmed baryons Xi(+(+))(cc) with the Lambda(+)(c) K- pi(+)(pi(+) ) and. Xi(0)(c) pi(+)(pi(+)) final states. No significant signal is observed. We also search for two excited charmed strange baryons, Xi(c)(3055)(+) and Xi(c)(3123)(+) with the Sigma(++)(c)(2455)K- and Sigma(++)(c)(2520)K- final states. The Xi(c)(3055)(+) signal is observed with a significance of 6.6 standard deviations including systematic uncertainty, while no signature of the Xi(c)(3123)(+) is seen. We also study properties of the Xi(c)(2645)(+) and measure a width of 2.6 +/- 0.2(stat) +/- 0.4(syst) MeV/c(2), which is the first significant determination.

    DOI: 10.1103/PhysRevD.89.052003

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  • Measurement of the tau-lepton Lifetime at Belle 査読

    K. Belous, M. Shapkin, A. Sokolov, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, A. M. Bakich, A. Bala, B. Bhuyan, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, Z. Dolezal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, T. Iwashita, I. Jaegle, T. Julius, E. Kato, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, H. Miyata, R. Mizuk, G. B. Mohanty, T. Mori, R. Mussa, Y. Nagasaka, E. Nakano, M. Nakao, M. Nayak, E. Nedelkovska, C. Ng, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, S. L. Olsen, W. Ostrowicz, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y-S. Sohn, S. Stanic, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   112 ( 3 )   031801-1 - 031801-6   2014年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The lifetime of the tau lepton is measured using the process e(+) e(-) -&gt; tau(+) tau(-), where both tau leptons decay to 3 pi nu(tau). The result for the mean lifetime, based on 711 fb(-1) of data collected with the Belle detector at the Upsilon(4S) resonance and 60 MeV below, is tau = (290.17 +/- 0.53(stat) +/- 0.33(syst)) x 10(-15) s. The first measurement of the lifetime difference between tau(+) and tau(-) is performed. The upper limit on the relative lifetime difference between positive and negative tau leptons is vertical bar Delta tau vertical bar/tau &lt; 7.0 x 10(-3) at 90% C.L.

    DOI: 10.1103/PhysRevLett.112.031801

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  • Measurement of the decays B-s(0) -&gt; J/psi phi(1020), B-s(0) -&gt; J/psi f(2)'(1525) and B-s(0) -&gt; J/psi K+K- at Belle 査読

    F. Thorne, C. Schwanda, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bala, B. Bhuyan, G. Bonvicini, M. Bracko, M. -C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, S. Esen, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, V. Gaur, N. Gabyshev, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, D. H. Kah, J. H. Kang, E. Kato, C. Kiesling, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, J. Klucar, B. R. Ko, P. Kodys, P. Krizan, P. Krokovny, T. Kuhr, J. S. Lange, S. -H. Lee, J. Libby, C. Liu, Y. Liu, P. Lukin, D. Matvienko, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, C. Ng, S. Nishida, O. Nitoh, S. Okuno, C. Oswald, G. Pakhlova, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Prim, M. Ritter, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, D. Semmler, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, M. Uchida, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, G. Varner, K. E. Varvell, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, Y. Yamashita, S. Yashchenko, C. Z. Yuan, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   88 ( 11 )   114006-1 - 114006-8   2013年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the branching fraction of the decay B-s(0) -&gt; J/psi phi(1020), evidence and a branching fraction measurement for B-s(0) -&gt; J/psi f(2)'(1525), and the determination of the total B-s(0) -&gt; J/psi K+K- branching fraction, including the resonant and nonresonant contributions to the K+K- channel. We also determine the S-wave contribution within the phi(1020) mass region. The absolute branching fractions are B[B-s(0) -&gt; J/psi phi(1020)] = (1.25 +/- 0.07(stat) +/- 0.08(syst) +/- 0.22(f(s))) x 10(-3), B[B-s(0) -&gt; J/psi f(2)'(1525)] = (0.26 +/- 0.06(stat) +/- 0.02(syst) +/- 0.05(f(s))) x 10(-3), and B[B-s(0) -&gt; J/psi K+K-] = (1.01 +/- 0.09(stat) +/- 0.10(syst) +/- 0.18(f(s))) x 10(-3), where the last systematic error is due to the branching fraction of b (b) over bar -&gt; B-s(()*()) B-s(()*()). The branching fraction ratio is found to be B[B-s(0) -&gt; J/psi f(2)'(1525)]/B[B-s(0) -&gt; J/psi phi(1020)] = (21.5 +/- 4.9(stat) +/- 2.6(syst))%. All results are based on a 121. 4 fb(-1) data sample collected at the Upsilon(5S) resonance by the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.88.114006

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  • High-statistics study of K-S(0) pair production in two-photon collisions 査読

    S. Uehara, Y. Watanabe, H. Nakazawa, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, J. Dingfelder, Z. Dolezal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, F. Giordano, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, E. Kato, H. Kawai, T. Kawasaki, C. Kiesling, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, Y. J. Kim, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Lee, J. Li, Y. Li, C. Liu, Z. Q. Liu, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, T. Mori, N. Muramatsu, R. Mussa, Y. Nagasaka, M. Nakao, C. Ng, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, R. Seidl, K. Senyo, O. Seon, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, M. Sumihama, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, C. Van Hulse, G. Varner, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, K. M. Williams, E. Won, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   ( 12 )   2013年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:OXFORD UNIV PRESS INC  

    We report a high-statistics measurement of the differential cross section of the process gamma gamma -&gt; (KSKS0)-K-0 in the range 1.05 GeV &lt;= W &lt;= 4.00 GeV, where W is the center-of-mass energy of the colliding photons, using 972 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider operated at and near the Upsilon-resonance region. The differential cross section is fitted by parameterized S-, D-0-, D-2-, G(0)-, and G(2)-wave amplitudes. In the D-2 wave, the f(2)(1270), a(2)(1320), and f(2)'(1525) are dominant and a resonance, the f(2)(2200), is also present. The f(0)(1710) and possibly the f(0)(2500) are seen in the S wave. The mass, total width, and product of the two-photon partial decay width and decay branching fraction to the K (K) over bar state Gamma(gamma gamma) B(K (K) over bar) are extracted for the f(2)'(1525), f(0)(1710), f(2)(2200), and f(0)(2500). The destructive interference between the f(2)(1270) and a(2)(1320) is confirmed by measuring their relative phase. The parameters of the charmonium states chi(c0) and chi(c2) are updated. Possible contributions from the chi(c0)(2P) and chi(c2)(2P) states are discussed. A new upper limit for the branching fraction of the P- and CP-violating decay channel eta(c) -&gt; (KSKS0)-K-0 is reported. The detailed behavior of the cross section is updated and compared with QCD-based calculations.

    DOI: 10.1093/ptep/ptt097

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  • Measurement of the CP violation parameters in B-0 -&gt; pi(+) pi(-) decays 査読

    J. Dalseno, K. Prothmann, C. Kiesling, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bala, A. Bay, P. Behera, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S-K Choi, Y. Choi, D. Cinabro, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, K. Dutta, S. Eidelman, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, V. Gaur, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, T. Higuchi, Y. Hoshi, W-S Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Julius, D. H. Kah, E. Kato, H. Kawai, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, B. Kronenbitter, A. Kuzmin, Y-J Kwon, S-H Lee, J. Li, Y. Li, L. Li Gioi, J. Libby, C. Liu, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, H-G Moser, N. Muramatsu, R. Mussa, Y. Nagasaka, M. Nakao, M. Nayak, E. Nedelkovska, C. Ng, C. Niebuhr, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T-A Shibata, J-G Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y-S Sohn, E. Solovieva, S. Stanic, M. Staric, M. Steder, M. Sumihama, K. Sumisawa, T. Sumiyoshi, U. Tamponi, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, M. N. Wagner, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   88 ( 9 )   092003-1 - 092003-11   2013年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the charge-parity (CP) violating parameters in B-0 -&gt; pi(+) pi(-) decays. The results are obtained from the final data sample containing 772 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. We obtain the CP violation parameters
    A(cp)(B-0 -&gt; pi(+) pi(-)) = +0.33 +/- 0.06(stat) +/- 0.03(syst),
    S-cp(B-0 -&gt; pi(+) pi(-)) = -0.64 +/- 0.08(stat) +/- 0.03(syst),
    where A(CP) and S-CP represent the direct and mixing-induced CP asymmetries in B-0 -&gt; pi(+) pi(-) decays, respectively. Using an isospin analysis including results from other Belle measurements, we find 23.8 degrees &lt; phi(2) &lt; 66.8 degrees is disfavored at the 1 sigma level, where phi(2) is one of the three interior angles of the Cabibbo-Kobayashi-Maskawa unitarity triangle related to B-u,B-d decays.

    DOI: 10.1103/PhysRevD.88.092003

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  • First observation of Cabibbo-suppressed Xi(0)(c) decays 査読

    R. Chistov, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. -S. Cho, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, M. Danilov, Z. Dolezal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, E. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Y. Liu, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, E. Nedelkovska, C. Ng, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, S. L. Olsen, C. Oswald, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, H. Sahoo, T. Saito, K. Sakai, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, M. Sumihama, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, J. Yamaoka, Y. Yamashita, S. Yashchenko, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   88 ( 7 )   071103-1 - 071103-7   2013年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of the Cabibbo-suppressed decays Xi(0)(c) -&gt; Xi K--(+), Xi(0)(c) -&gt; Lambda K+K- and Xi(0)(c) -&gt; Lambda phi, using a data sample of 711 fb(-1) collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure the ratios of branching fractions to be B(Xi(0)(c)-&gt;Xi K--(+))/B(Xi(0)(c)-&gt;Xi(-)pi(+)) = (2.75 +/- 0.51 +/- 0.25) x 10(-2), B(Xi(0)(c)-&gt;Lambda K+K-)/B(Xi(0)(c)-&gt;Xi(-)pi(+)) = (2.86 +/- 0.61 +/- 0.37) x 10(-2) and B(Xi(0)(c)-&gt;Lambda phi)/B(Xi(0)(c)-&gt;Xi(-)pi(+)) = (3.43 +/- 0.58 +/- 0.32) X 10(-2), where the first uncertainty is statistical and the second is systematic.

    DOI: 10.1103/PhysRevD.88.071103

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  • Experimental constraints on the spin and parity of the Z(4430)(+) 査読

    K. Chilikin, R. Mizuk, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, E. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Y. Liu, D. Liventsev, P. Lukin, J. MacNaughton, D. Matvienko, K. Miyabayashi, H. Miyata, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, E. Nedelkovska, C. Ng, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, S. L. Olsen, C. Oswald, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, H. Sahoo, T. Saito, K. Sakai, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, M. Sumihama, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, S. Yashchenko, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   88 ( 7 )   074026-1 - 074026-12   2013年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We perform a full amplitude analysis of B-0 -&gt; psi'K+ pi(-) decays, with psi' -&gt; mu + mu- or e+e -, to constrain the spin and parity of the Z(4430)-. The JP = 1(+) hypothesis is favored over the 0(-), 1(-), 2(-) and 2(+) hypotheses at the levels of 3: 4 sigma, 3: 7 sigma, 4: 7 sigma and 5.1 sigma , respectively. The analysis is based on a 711 fb(-1) data sample that contains 772 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance by the Belle detector at the asymmetric-energy e(+)e(-) collider KEKB.

    DOI: 10.1103/PhysRevD.88.074026

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  • Measurement of the wrong-sign decay D0→K<sup>+</sup>π <sup>-</sup>π<sup>+</sup>π<sup>-</sup> 査読

    E. White, A. J. Schwartz, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, G. Bonvicini, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. S. Cho, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dingfelder, Z. Doležal, Z. Drásal, D. Dutta, S. Eidelman, D. Epifanov, S. Esen, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, D. H. Kah, J. H. Kang, E. Kato, C. Kiesling, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, Y. Li, L. Li Gioi, J. Libby, C. Liu, Y. Liu, D. Liventsev, P. Lukin, D. Matvienko, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec

    Physical Review D - Particles, Fields, Gravitation and Cosmology   88 ( 6 )   051101-1 - 051101-6   2013年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    A measurement of the rate for the "wrong-sign" decay D0→K+π-π+π- relative to that for the "right-sign" decay D0→K -π+π+π- is presented. Using 791 fb-1 of data collected with the Belle detector, we obtain a branching fraction ratio of Rws=[0.324±0.008(stat)±0. 007(sys)]%. Multiplying this ratio by the world average value for the branching fraction B(D0→K-π+π+π -) gives a branching fraction B(D0→K+π -π+π-)=(2.61±0.06-0.08+0.09) ×10-4. © 2013 American Physical Society.

    DOI: 10.1103/PhysRevD.88.051101

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  • Search for bottomonium states in exclusive radiative υ(2s) decays 査読

    S. Sandilya, K. Trabelsi, G. B. Mohanty, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, T. Aziz, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, J. Dingfelder, Z. Doležal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, E. Kato, H. Kawai, T. Kawasaki, C. Kiesling, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, Y. J. Kim, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, Y. Li, J. Libby, Z. Q. Liu, D. Liventsev, P. Lukin, J. Macnaughton, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, N. Muramatsu, R. Mussa, Y. Nagasaka, M. Nakao, M. Nayak, C. Ng, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa

    Physical Review Letters   111 ( 11 )   112001-1 - 112001-6   2013年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We search for bottomonium states in Υ(2S)→(bb̄)γ decays with an integrated luminosity of 24.7 fb-1 recorded at the Υ(2S) resonance with the Belle detector at KEK, containing (157.8±3.6)×106 Υ(2S) events. The (bb̄) system is reconstructed in 26 exclusive hadronic final states composed of charged pions, kaons, protons, and KS0 mesons. We find no evidence for the state recently observed around 9975 MeV (Xbb̄) in an analysis based on a data sample of 9.3×106 Υ(2S) events collected with the CLEO III detector. We set a 90% confidence level upper limit on the branching fraction B[Υ(2S)→Xbb̄γ]×ΣiB[X bb̄→hi]<4.9×10-6, summed over the exclusive hadronic final states employed in our analysis. This result is an order of magnitude smaller than the measurement reported with CLEO data. We also set an upper limit for the ηb(1S) state of B[Υ(2S)→ηb(1S)γ]×ΣiB[η b(1S)→hi]<3.7×10-6. © 2013 American Physical Society.

    DOI: 10.1103/PhysRevLett.111.112001

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  • First observation of the Z(b)(0)(10610) in a Dalitz analysis of Upsilon(10860) -&gt; Upsilon(nS)pi(0)pi(0) 査読

    P. Krokovny, A. Bondar, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, A. Bala, A. Bay, V. Bhardwaj, B. Bhuyan, G. Bonvicini, C. Bookwalter, A. Bozek, M. Bracko, T. E. Browder, P. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, J. Dingfelder, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, E. Kato, H. Kawai, T. Kawasaki, C. Kiesling, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, Y. Li, J. Libby, Y. Liu, Z. Q. Liu, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, R. Mussa, Y. Nagasaka, M. Nakao, M. Nayak, E. Nedelkovska, C. Ng, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, C. Oswald, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, K. Sakai, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   88 ( 5 )   052016-1 - 052016-11   2013年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of Upsilon(10860) -&gt; Upsilon(1, 2, 3S)pi(0)pi(0) decays. The neutral partner of the Z(1/b)(10610), the Z(b)(0)(10610) decaying to Upsilon(2, 3S)pi(0), is observed for the first time with a 6.5 sigma significance using a Dalitz analysis of Upsilon(10860) -&gt; Upsilon (2, 3S)pi(0)pi(0) decays. The results are obtained with a 121.4 fb(-1) data sample collected with the Belle detector at the Upsilon(10860) resonance at the KEKB asymmetric- energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.88.052016

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  • Measurement of e(+)e(-) -&gt; omega pi(0), K*(892)(K)over-bar and K-2*(1430)(K)over-bar at root s near 10.6 GeV 査読

    C. P. Shen, C. Z. Yuan, A. Sibidanov, P. Wang, K. Hayasaka, X. L. Wang, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, H. Hayashii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, D. H. Kah, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, Y. Li, J. Libby, C. Liu, Y. Liu, P. Lukin, D. Matvienko, H. Miyata, R. Mizuk, A. Moll, T. Mori, N. Muramatsu, R. Mussa, Y. Nagasaka, M. Nakao, Z. Natkaniec, M. Nayak, C. Ng, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, Y. Onuki, G. Pakhlova, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, M. Shapkin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, A. Vossen, M. N. Wagner, C. H. Wang, Y. Watanabe, K. M. Williams, E. Won, Y. Yamashita, S. Yashchenko, Y. Yook, C. C. Zhang, Z. P. Zhang, V. Zhilich

    PHYSICAL REVIEW D   88 ( 5 )   052019-1 - 052019-9   2013年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using data samples of 89 fb(-1), 703 fb(-1), and 121 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider at center-of-mass energies 10.52 GeV, 10.58 GeV, and 10.876 GeV, respectively, we study the exclusive reactions e(+)e(-) -&gt; omega pi(0), K*(892)(K) over bar, and K-2*(1430)(K) over bar. ( Charge-conjugate modes are included implicitly.) Significant signals of omega pi(0), K*(892)(0)(K) over bar (0), and K-2*(1430)K--(+) are observed for the first time at these energies, and the energy dependencies of the cross sections are presented. On the other hand, no significant excesses for K*(892)K--(+) and K-2*(1430)(0)(K) over bar (0) are found, and we set limits on the cross section ratios R-VP = sigma(B)(e(+)e(-)-&gt; K*(892)K-0(0))/sigma(B)(e(+)e(-)-&gt; K*(892)K--(+)) &gt; 4.3, 20.0, and 5.4, and R-TP = sigma(B)(e(+)e(-) -&gt; K-2*(1430)(0)(K) over bar (0))/sigma(B)(e(+)e(-)-&gt; K-2*(1430)K--(+)) &lt; 1.1, 0.4, and 0.6, for center-of-mass energies of 10.52 GeV, 10.58 GeV, and 10.876 GeV, respectively, at the 90% C.L.

    DOI: 10.1103/PhysRevD.88.052019

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  • Measurements of branching fractions of leptonic and hadronic D-s(+) meson decays and extraction of the D-s(+) meson decay constant 査読

    A. Zupanc, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, A. Bala, B. Bhuyan, G. Bonvicini, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, P. Chang, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, E. Kato, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, J. Libby, Z. Q. Liu, D. Liventsev, P. Lukin, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, R. Mussa, E. Nakano, M. Nakao, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Prim, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, D. Semmler, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, T. Uglov, S. Uno, Y. Usov, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, E. Won, Y. Yamashita, S. Yashchenko, Z. P. Zhang, V. Zhilich, V. Zhulanov

    JOURNAL OF HIGH ENERGY PHYSICS   2013 ( 9 )   2013年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER  

    We present measurements of absolute branching fractions of hadronic and leptonic D-s(+) decays to K-K+pi(+), ($) over bar (0) ($) over bar (+), eta pi(+), mu(+)nu(mu) and tau(+)nu(tau) and report a search for the leptonic D-s(+) -&gt; e(+) nu(e) decays. The results are obtained from a data sample of 913 fb(-1) collected at or near the gamma (4S) and gamma (5S) resonances with the Belle detector at the KEKB asymmetric- energy e(+)e(-) collider. The branching fractions of hadronic decays are measured to be
    B(D-s(+) -&gt; K-K+pi(+)) = (5.06 +/- 0: 15 +/- 0.21)%,
    B(D-s(+) -&gt; ($) over bar (0) ($) over bar (+)) = (2.95 +/- 0.11 +/- 0.09)%,
    B(D-s(+) -&gt; eta pi(+)) = (1.82 +/- 0.14 +/- 0.07)%,
    where the fi rst and second uncertainties are statistical and systematic, respectively. The branching fractions of leptonic decays are measured to be
    B(D-s(+) -&gt; mu(+)nu(mu)) = (0.531 +/- 0.028 +/- 0.020)%,
    B(D-s(+) -&gt; tau(+)nu(tau)) = (5.70 +/- 0.21(-0.30)(+0.31))%,
    which are combined to determine the D-s(+) meson decay constant
    fD(s) = (255.5 +/- 4.2 +/- 5.1) MeV.
    We find no significant signal for D-s(+) -&gt; e(+)nu(e) decays and set an upper limit of B(D-s(+) -&gt; e(+)nu(e)) &lt; 1.0(0.83) +/- 10(-4) at 95% (90%) con fi dence level.

    DOI: 10.1007/JHEP09(2013)139

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Precision measurement of charged pion and kaon differential cross sections in e<sup>+</sup>e<sup>-</sup> annihilation at √s=10.52 GeV 査読

    M. Leitgab, R. Seidl, M. Grosse Perdekamp, A. Vossen, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, B. Bhuyan, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, Z. Drásal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, V. Gaur, N. Gabyshev, R. Gillard, F. Giordano, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, W. W. Jacobs, T. Julius, J. H. Kang, P. Kapusta, E. Kato, T. Kawasaki, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, M. J. Kim, J. Klucar, B. R. Ko, P. Kodyš, R. T. Kouzes, P. Križan, P. Krokovny, R. Kumar, T. Kumita, Y. J. Kwon, J. S. Lange, S. H. Lee, Y. Li, Z. Q. Liu, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, A. Moll, N. Muramatsu, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, E. Nedelkovska, C. Ng, N. K. Nisar, O. Nitoh, A. Ogawa, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, C. Oswald, P. Pakhlov, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen

    Physical Review Letters   111 ( 6 )   062002-1 - 062002-7   2013年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Measurements of inclusive differential cross sections for charged pion and kaon production in e+e- annihilation have been carried out at a center-of-mass energy of √s=10.52 GeV. The measurements were performed with the Belle detector at the KEKB e+e- collider using a data sample containing 113×106 e+e -→qq̄ events, where q={u,d,s,c}. We present charge-integrated differential cross sections dσh±/dz for h±={π±,K±} as a function of the relative hadron energy z=2Eh/√s from 0.2 to 0.98. The combined statistical and systematic uncertainties for π± (K±) are 4% (4%) at z∼0.6 and 15% (24%) at z∼0.9. The cross sections are the first measurements of the z dependence of pion and kaon production for z>0.7 as well as the first precision cross section measurements at a center-of-mass energy far below the Z0 resonance used by the experiments at LEP and SLC. © 2013 American Physical Society.

    DOI: 10.1103/PhysRevLett.111.062002

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  • Measurement of exclusive Upsilon(1S) and Upsilon(2S) decays into vector-pseudoscalar final states 査読

    C. P. Shen, C. Z. Yuan, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, A. M. Bakich, A. Bala, B. Bhuyan, M. Bischofberger, A. Bozek, M. Bracko, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. -S. Cho, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, J. Dingfelder, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, K. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Lee, R. Leitner, J. Li, Y. Li, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, R. Mussa, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, E. Nedelkovska, C. Ng, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, S. L. Olsen, W. Ostrowicz, P. Pakhlov, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, T. Peng, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, O. Seon, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Steder, M. Sumihama, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, T. Tsuboyama, M. Uchida, S. Uehara, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, M. N. Wagner, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, E. Won, H. Yamamoto, J. Yamaoka, Y. Yamashita, S. Yashchenko, Y. Yook, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   88 ( 1 )   011102-1 - 011102-8   2013年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using samples of 102 million Upsilon(1S) and 158 million Upsilon(2S) events collected with the Belle detector, we study exclusive hadronic decays of these two bottomonium resonances to (KSK+)-K-0 pi(-) and charge-conjugate (c.c.) states, pi(+) pi(-) pi(0) pi(0), and pi(+) pi(-) pi(0), and to the two-body Vector-Pseudoscalar (K*(892)0 (K) over bar (0) + c.c., K*(892)K--(+) + c.c., omega pi(0), and rho pi) final states. For the first time, signals are observed in the modes Upsilon(1S) -&gt; K-S(0) K+ pi(-) + c.c., pi(+) pi(-) pi(0) pi(0), and Upsilon(2S) -&gt; pi(+) pi(-) pi(0) pi(0), and evidence is found for the modes Upsilon(1S) -&gt; pi(+) pi(-) pi(0), K-*(892)(0)(K) over bar (0) + c.c., and Upsilon(2S) -&gt; K-S(0) K+ pi(-) + c.c. Branching fractions are measured for all the processes, while 90% confidence level upper limits on the branching fractions are also set for the modes with a statistical significance of less than 3 sigma. The ratios of the branching fractions of Upsilon(2S) and Upsilon(1S) decays into the same final state are used to test a perturbative QCD prediction for Okubo-Zweig-Iizuka- suppressed bottomonium decays.

    DOI: 10.1103/PhysRevD.88.011102

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  • Study of e+<sup>e-</sup>→π+<sup>π-</sup>J/ψ and observation of a charged charmoniumlike state at Belle 査読

    Liu Z.Q, Shen C.P, Yuan C.Z, Adachi I, Aihara H, Asner D.M, Aulchenko V, Aushev T, Aziz T, Bakich A.M, Bala A, Belous K, Bhardwaj V, Bhuyan B, Bischofberger M, Bondar A, Bonvicini G, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chang P, Chekelian V, Chen A, Chen P, Cheon B.G, Chistov R, Cho K, Chobanova V, Choi S.-K, Choi Y, Cinabro D, Dalseno J, Danilov M, Dole?al Z, Dr{\'a}sal Z, Drutskoy A, Dutta D, Dutta K, Eidelman S, Epifanov D, Farhat H, Fast J.E, Feindt M, Ferber T, Frey A, Gaur V, Gabyshev N, Ganguly S, Gillard R, Goh Y.M, Golob B, Haba J, Hayasaka K, Hayashii H, Horii Y, Hoshi Y, Hou W.-S, Hsiung Y.B, Hyun H.J, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki Y, Joffe D, Julius T, Kah D.H, Kang J.H, Kawasaki T, Kiesling C, Kim H.J, Kim J.B, Kim J.H, Kim K.T, Kim M.J, Kim Y.J, Kinoshita K, Klucar J, Ko B.R, Kody? P, Korpar S, Kri?an P, Krokovny P, Kuhr T, Kwon Y.-J, Lange J.S, Lee S.-H, Li J, Li Y, Libby J, Liu C, Lukin P, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty G.B, Moll A, Mussa R, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nayak M, Nedelkovska E, Nisar N.K, Nishida S, Nitoh O, Ogawa S, Okuno S, Olsen S.L, Onuki Y, Ostrowicz W, Oswald C, Pakhlov P, Pakhlova G, Park H, Park H.K, Pedlar T.K, Pestotnik R, Petri? M, Piilonen L.E, Ritter M, R{\"o}hrken M, Rostomyan A, Sahoo H, Saito T, Sakai Y, Sandilya S, Santel D, Sanuki T, Sato Y, Savinov V, Schneider O, Schnell G, Schwanda C, Seidl R, Semmler D, Senyo K, Seon O, Sevior M.E, Shapkin M, Shibata T.-A, Shiu J.-G, Shwartz B, Sibidanov A, Simon F, Smerkol P, Sohn Y.-S, Sokolov A, Solovieva E, Stari? M, Steder M, Sumihama M, Sumiyoshi T, Tamponi U, Tanida K, Tatishvili G, Teramoto Y, Trabelsi K, Tsuboyama T, Uchida M, Uehara S, Uglov T, Unno Y, Uno S, Vahsen S.E, Van Hulse C, Vanhoefer P, Varner G, Varvell K.E, Vorobyev V, Wagner M.N, Wang C.H, Wang M.-Z, Wang P, Wang X.L, Watanabe M, Watanabe Y, Won E, Yabsley B.D, Yamaoka J, Yamashita Y, Yashchenko S, Yook Y, Yusa Y, Zhang C.C, Zhang Z.P, Zhilich V, Zupanc A

    Physical Review Letters   111 ( 1 )   2013年7月

  • Search for B→h(*) νν̄ with the full Belle Υ(4S) data sample 査読

    O. Lutz, S. Neubauer, M. Heck, T. Kuhr, A. Zupanc, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, T. Aziz, A. M. Bakich, K. Belous, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, P. Chang, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Doležal, Z. Drásal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, M. Feindt, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Julius, J. H. Kang, P. Kapusta, E. Kato, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, R. T. Kouzes, P. Križan, P. Krokovny, B. Kronenbitter, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, Y. Li, C. Liu, Y. Liu, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, G. B. Mohanty, A. Moll, T. Müller, N. Muramatsu, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, E. Nedelkovska, C. Ng

    Physical Review D - Particles, Fields, Gravitation and Cosmology   87 ( 11 )   111103-1 - 111103-7   2013年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We report a search for the rare decays B→h(*) νν̄, where h(z.ast;) stands for K+, KS0, K*+, K*0, π+, π0, ρ+, ρ0 and p. The results are obtained from a 711 fb-1 data sample that contains 772×106BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB e+e- collider. We search for signal candidates by fully reconstructing a hadronic decay of the accompanying B meson and requiring a single h(*) meson left on the signal side. No significant signal is observed and we set upper limits on the branching fractions at 90% confidence level. The measurements of B+→K *+νν̄, B+→π +νν̄, B0→π0νν̄ and B0→ρ0ν ν̄ provide the world's currently most restrictive limits. © 2013 American Physical Society.

    DOI: 10.1103/PhysRevD.87.111103

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  • Study of e(+)e(-) -&gt; pi(+)pi(-) J/psi and Observation of a Charged Charmoniumlike State at Belle 査読

    Z. Q. Liu, C. P. Shen, C. Z. Yuan, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, A. Bala, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, R. Chistov, K. Cho, V. Chobanova, S-K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, K. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W-S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, D. Joffe, T. Julius, D. H. Kah, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, Y-J. Kwon, J. S. Lange, S-H. Lee, J. Li, Y. Li, J. Libby, C. Liu, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, M. Nayak, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, C. Oswald, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, A. Rostomyan, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, D. Santel, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, R. Seidl, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, T-A. Shibata, J-G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y-S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Steder, M. Sumihama, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, V. Vorobyev, M. N. Wagner, C. H. Wang, M-Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, E. Won, B. D. Yabsley, J. Yamaoka, Y. Yamashita, S. Yashchenko, Y. Yook, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   110 ( 25 )   252002-1 - 252002-7   2013年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The cross section for e(+)e(-) -&gt; pi(+)pi(-) J/psi between 3.8 and 5.5 GeV is measured with a 967 fb(-1) data sample collected by the Belle detector at or near the Upsilon(nS) (n = 1, 2, . . . , 5) resonances. The Y(4260) state is observed, and its resonance parameters are determined. In addition, an excess of pi(+)pi(-) J/psi production around 4 GeV is observed. This feature can be described by a Breit-Wigner parametrization with properties that are consistent with the Y(4008) state that was previously reported by Belle. In a study of Y(4260) -&gt; pi(+)pi(-) J/psi decays, a structure is observed in the M(pi(+/-) J/psi) mass spectrum with 5.2 sigma significance, with mass M = (3894.5 +/- 6.6 +/- 4.5) MeV/c(2) and width Gamma = (63 +/- 24 +/- 26) MeV/c(2), where the errors are statistical and systematic, respectively. This structure can be interpreted as a new charged charmoniumlike state.

    DOI: 10.1103/PhysRevLett.110.252002

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  • Search for an H-Dibaryon with a Mass near 2m<inf>Λ</inf> in Υ(1S) and Υ(2S) Decays 査読

    B. H. Kim, S. L. Olsen, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, A. Bay, K. Belous, B. Bhuyan, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. S. Cho, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Doležal, S. Eidelman, D. Epifanov, S. Esen, H. Farhat, J. E. Fast, V. Gaur, S. Ganguly, R. Gillard, Y. M. Goh, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, P. Kapusta, E. Kato, H. Kichimi, H. J. Kim, H. O. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, R. T. Kouzes, P. Križan, P. Krokovny, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, X. Li, Y. Li, J. Libby, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, R. Mussa, E. Nakano, M. Nakao, E. Nedelkovska, C. Ng, N. K. Nisar, S. Nishida, K. Nishimura, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, M. Peters, M. Petrič, L. E. Piilonen

    Physical Review Letters   110 ( 22 )   222002-1 - 222002-6   2013年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We report the results of a high-statistics search for H dibaryon production in inclusive Υ(1S) and Υ(2S) decays. No indication of an H dibaryon with a mass near the MH=2mΛ threshold is seen in either the H→Λpπ- or ΛΛ decay channels and 90% confidence level branching-fraction upper limits are set that are between one and two orders of magnitude below the measured branching fractions for inclusive Υ(1S) and Υ(2S) decays to antideuterons. Since Υ(1S,2S) decays produce flavor-SU(3)-symmetric final states, these results put stringent constraints on H dibaryon properties. The results are based on analyses of 102 million Υ(1S) and 158 million Υ(2S) events collected with the Belle detector at the KEKB e+e- collider. © 2013 American Physical Society.

    DOI: 10.1103/PhysRevLett.110.222002

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  • Measurement of the inclusive semileptonic branching fraction B(Bs0→X<sup>-</sup>ℓ<sup>+</sup>ν<inf>ℓ</inf>) at Belle 査読

    C. Oswald, P. Urquijo, J. Dingfelder, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, K. Belous, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, P. Chang, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, S. Eidelman, S. Esen, H. Farhat, J. E. Fast, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, D. H. Kah, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, S. Korpar, R. T. Kouzes, P. Križan, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, Y. J. Kwon, S. H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, O. Lutz, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, Y. Nagasaka, E. Nakano, M. Nakao, E. Nedelkovska, N. K. Nisar, S. Nishida

    Physical Review D - Particles, Fields, Gravitation and Cosmology   87 ( 7 )   072008-1 - 072008-10   2013年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We report a measurement of the inclusive semileptonic Bs0 branching fraction in a 121 fb-1 data sample collected near the Υ(5S) resonance with the Belle detector at the KEKB asymmetric energy e +e- collider. Events containing Bs0(*) B̄s0(*) pairs are selected by reconstructing a tag side Ds+ and identifying a signal side lepton ℓ+ (ℓ=e, μ) that is required to have the same-sign charge to ensure that both originate from different Bs0 mesons. The Bs0→X -ℓ+νℓ branching fraction is extracted from the ratio of the measured yields of Ds+ mesons and Ds+ℓ+ pairs and the known production and branching fractions. The inclusive semileptonic branching fraction is measured to be [10.6±0.5(stat)±0.7(syst)]%. © 2013 American Physical Society.

    DOI: 10.1103/PhysRevD.87.072008

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  • Search for heavy neutrinos at Belle 査読

    D. Liventsev, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bay, K. Belous, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, S. Esen, H. Farhat, J. E. Fast, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, K. Itagaki, R. Itoh, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, J. Klucar, B. R. Ko, S. Korpar, R. T. Kouzes, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, R. Louvot, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, N. K. Nisar, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, C. Oswald, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, K. Prothmann, M. Ritter, M. Roehrken, S. Ryu, H. Sahoo, T. Saito, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, Y. Sato, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Sumihama, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, T. Tsuboyama, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, V. Vorobyev, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   87 ( 7 )   2013年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report on a search for heavy neutrinos in B-meson decays. The results are obtained using a data sample that contains 772 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. No signal is observed and upper limits are set on mixing of heavy neutrinos with left-handed neutrinos of the Standard Model in the mass range 0.5-5.0 GeV/c(2). DOI: 10.1103/PhysRevD.87.071102

    DOI: 10.1103/PhysRevD.87.071102

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Evidence for B-→τ-ν<inf>̄τ</inf> with a hadronic tagging method using the full data sample of belle 査読

    K. Hara, Y. Horii, T. Iijima, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, T. Aziz, A. M. Bakich, M. Barrett, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. S. Cho, K. Cho, Y. Choi, D. Cinabro, J. Dalseno, J. Dingfelder, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, S. Esen, H. Farhat, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, T. Higuchi, Y. Hoshi, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, R. T. Kouzes, P. Križan, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, M. Nayak, C. Ng

    Physical Review Letters   110 ( 13 )   131801-1 - 131801-6   2013年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We measure the branching fraction of B-→τ -ν̄τ using the full Υ(4S) data sample containing 772×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. Events with BB̄ pairs are tagged by reconstructing one of the B mesons decaying into hadronic final states, and B-→τ -ν̄τ candidates are detected in the recoil. We find evidence for B-→τ -ν̄τ with a significance of 3.0 standard deviations including systematic errors and measure a branching fraction B(B -→τ-ν̄τ)=[0.72-0.25+0. 27(stat)±0.11(syst)]×10-4. © 2013 American Physical Society.

    DOI: 10.1103/PhysRevLett.110.131801

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  • Search for lepton-flavor and lepton-number-violating Τ→ℓhh' decay modes 査読

    Y. Miyazaki, K. Hayasaka, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bay, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bozek, M. Bračko, T. E. Browder, M. C. Chang, A. Chen, P. Chen, B. G. Cheon, R. Chistov, K. Cho, Y. Choi, J. Dalseno, Z. Doležal, A. Drutskoy, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, J. Haba, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Julius, J. H. Kang, C. Kiesling, H. J. Kim, H. O. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, S. Koblitz, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Lee, Y. Li, C. L. Lim, C. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, T. Sanuki, Y. Sato, O. Schneider, C. Schwanda, K. Senyo, O. Seon

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   719 ( 4-5 )   346 - 353   2013年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We search for lepton-flavor and lepton-number-violating. Τ decays into a lepton (ℓ= electron or muon) and two charged mesons (h,h'=π± or K±) using 854 fb<sup>-1</sup> of data collected with the Belle detector at the KEKB asymmetric-energy e<sup>+</sup>e<sup>-</sup> collider. We obtain 90% confidence level upper limits on the. Τ→ℓhh' branching fractions in the range. (2.0-8.4)×10<sup>-8</sup>. These results improve upon our previously published upper limits by factors of about 1.8 on average. © 2013 Elsevier B.V.

    DOI: 10.1016/j.physletb.2013.01.032

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  • Measurements of branching fractions and direct CP asymmetries for B -&gt; K pi, B -&gt; pi pi and B -&gt; KK decays 査読

    Y. -T. Duh, T. -Y. Wu, P. Chang, G. B. Mohanty, Y. Unno, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, B. Bhuyan, M. Bischofberger, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, K. Cho, V. Chobanova, Y. Choi, Z. Dolezal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, A. Frey, V. Gaur, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, T. Julius, J. H. Kang, P. Kapusta, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Lee, Y. Li, J. Libby, C. Liu, Y. Liu, K. Miyabayashi, H. Miyata, R. Mizuk, T. Mori, N. Muramatsu, E. Nakano, M. Nakao, C. Ng, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Prim, M. Ritter, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, S. Sandilya, D. Santel, Y. Sato, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Sumihama, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, S. Uno, P. Vanhoefer, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, M. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   87 ( 3 )   031103-1 - 031103-8   2013年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurements of the branching fractions and direct CP asymmetries (A(CP)) for B -&gt; K pi, pi pi and KK decays (but not pi(0) pi(0)) based on the final data sample of 772 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We set a 90% confidence-level upper limit for K+K- at 2.0 x 10(-7); all other decays are observed with branching fractions ranging from 10(-6) to 10(-5). In the B-0/(B) over bar (0) -&gt; K-+/-pi(-/+) mode, we confirm Belle's previously reported large A(CP) with a value of -0.069 +/- 0.014 +/- 0.007 and a significance of 4.4 sigma. For all other flavor-specific modes, we find A(CP) values consistent with zero, including A(CP)(K+pi(0)) = +0.043 +/- 0.024 +/- 0.007 with 1.8 sigma significance. The difference of CP asymmetry between B-+/- -&gt; K-+/- pi(0) and B-0/(B) over bar (0) K-+/-pi(-/+) is found to be Delta A(K pi) equivalent to A(CP)(K+pi(0)) - A(CP)(K+pi(-)) = +0.112 +/- 0.027 +/- 0.007 with 4.0 sigma significance. We also calculate the ratios of partial widths for the B -&gt; K pi decays. Using our results, we test the validity of the sum rule A(CP)(K+pi(-)) + A(CP)(K-0 pi(+)) Gamma(K-0 pi(+))/Gamma(K+pi(-)) - A(CP)(K+pi(0))2 Gamma(K+pi(0))/Gamma(K+pi(-)) - A(CP)(K-0 pi(0))2 Gamma(K-0 pi(0))/Gamma(K+pi(-)) =0 and obtain a sum of -0.270 +/- 0.132 +/- 0.060 with 1:9 sigma significance. DOI: 10.1103/PhysRevD.87.031103

    DOI: 10.1103/PhysRevD.87.031103

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  • Search for CP violation in the decay D<sup>+</sup> → K <inf>S</inf><sup>0</sup>K<sup>+</sup> 査読

    Ko B.R, Won E, Adachi I, Aihara H, Arinstein K, Asner D.M, Aushev T, Bakich A.M, Belous K, Bhardwaj V, Bhuyan B, Bondar A, Bonvicini G, Bozek A, Bra?ko M, Browder T.E, Chekelian V, Chen A, Chen P, Cheon B.G, Chilikin K, Chistov R, Cho K, Choi S.-K, Choi Y, Cinabro D, Dalseno J, Dole?al Z, Dutta D, Eidelman S, Esen S, Farhat H, Fast J.E, Gaur V, Gabyshev N, Ganguly S, Gillard R, Goh Y.M, Golob B, Hayasaka K, Hayashii H, Hoshi Y, Hou W.-S, Hyun H.J, Iijima T, Ishikawa A, Iwasaki Y, Julius T, Kang J.H, Kato E, Kiesling C, Kim H.O, Kim J.B, Kim K.T, Kim M.J, Kim Y.J, Kinoshita K, Klucar J, Korpar S, Kouzes R.T, Kri?an P, Krokovny P, Kuhr T, Kumita T, Kuzmin A, Kwon Y.-J, Li Y, Liu C, Liventsev D, Louvot R, Miyabayashi K, Miyata H, Mizuk R, Mohanty G.B, Moll A, Muramatsu N, Nagasaka Y, Nakano E, Nakao M, Nedelkovska E, Ng C, Nellikunnummel N, Nishida S, Nishimura K, Nitoh O, Ogawa S, Ohshima T, Okuno S, Oswald C, Pakhlov P, Pakhlova G, Park H, Park H.K, Pedlar T.K, Pestotnik R, Petri? M, Piilonen L.E, Prothmann K, Ritter M, R{\"o}hrken M, Sahoo H, Saito T, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Schneider O, Schnell G, Schwanda C, Schwartz A.J, Senyo K, Seon O, Sevior M.E, Shapkin M, Shen C.P, Shibata T.-A, Shiu J.-G, Sibidanov A, Simon F, Smerkol P, Sohn Y.-S, Solovieva E, Stari? M, Sumiyoshi T, Tatishvili G, Teramoto Y, Trabelsi K, Tsuboyama T, Uchida M, Uglov T, Unno Y, Uno S, Van Hulse C, Vanhoefer P, Varner G, Wang C.H, Wang M.-Z, Wang P, Watanabe Y, Williams K.M, Yamashita Y, Zhang C.C, Zhilich V, Zupanc A

    Journal of High Energy Physics   2013 ( 2 )   1 - 12   2013年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1007/JHEP02(2013)098

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    その他リンク: http://orcid.org/0000-0001-6373-2346

  • Study of the hadronic transitions ${\Upsilon}(2{S}){\rightarrow}({\eta},{ { \pi } }^{0}){\Upsilon}(1{S})$ at Belle 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   87 ( 1 )   011104-1 - 011104-6   2013年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.87.011104

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  • Study of the hadronic transitions Y(2S) -&gt; (eta, pi(0))Y(1S) at Belle 査読

    U. Tamponi, R. Mussa, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, M. Barrett, B. Bhuyan, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I-S Cho, K. Cho, Y. Choi, J. Dalseno, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, D. Epifanov, S. Esen, H. Farhat, J. E. Fast, A. Frey, V. Gaur, R. Gillard, Y. M. Goh, B. Golob, K. Hayasaka, Y. Horii, Y. Hoshi, H. J. Hyun, T. Iijima, A. Ishikawa, Y. Iwasaki, I. Jaegle, J. H. Kang, T. Kawasaki, H. O. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, J. Klucar, B. R. Ko, P. Kodys, S. Korpar, R. T. Kouzes, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, S-H Lee, Y. Li, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, M. Nakao, Z. Natkaniec, C. Ng, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, H. K. Park, K. S. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, C. P. Shen, T-A Shibata, J-G Shiu, B. Shwartz, F. Simon, P. Smerkol, Y-S Sohn, A. Sokolov, E. Solovieva, M. Staric, T. Sumiyoshi, K. Tanida, N. Taniguchi, G. Tatishvili, Y. Teramoto, K. Trabelsi, S. Uehara, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, C. H. Wang, M-Z Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   87 ( 1 )   011104   2013年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We study the rare hadronic transitions Y(2S) -&gt; Y(1S)eta and Y(2S) -&gt; Y(1S)pi(0) using a sample of 158 x 10(6)Y(2S) decays collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure the ratios of branching fractions (B) B(Y(2S)-&gt; Y(1S)eta)/B(Y(2S)-&gt; Y(1S)pi(+)pi(-)) = (1.99 +/- 0.14(stat) +/- 0.11(syst) x 10(-3) and B(Y(2S)-&gt; Y(1S)pi(0))/B(Y(2S)-&gt; Y(1S)pi(+)pi(-)) &lt; 2.3 x 10(-4) at the 90% confidence level (CL). Assuming the value B(Y(2S)-&gt; Y(1S)pi(-)pi(+)) = (17.92 +/- 0.26)%, we obtain B(Y(2S)-&gt; Y(1S)eta) = (3.57 +/- 0.25(stat) +/- 0.21(syst)) x 10(-4) and Y(2S) -&gt; Y(1S)pi(0) &lt; 4.1 x 10(-5)(90%CL). DOI: 10.1103/PhysRevD.87.011104

    DOI: 10.1103/PhysRevD.87.011104

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  • Search for CP violation in the decay D<sup>+</sup> → K <inf>S</inf><sup>0</sup>K<sup>+</sup> 査読

    B. R. Ko, E. Won, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, K. Belous, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Doležal, D. Dutta, S. Eidelman, S. Esen, H. Farhat, J. E. Fast, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, Y. Iwasaki, T. Julius, J. H. Kang, E. Kato, C. Kiesling, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, S. Korpar, R. T. Kouzes, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, Y. Li, C. Liu, D. Liventsev, R. Louvot, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, Y. Nagasaka, E. Nakano, M. Nakao, E. Nedelkovska, C. Ng, N. Nellikunnummel, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, C. Oswald, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen, K. Prothmann, M. Ritter, M. Röhrken

    Journal of High Energy Physics   2013 ( 2 )   1 - 12   2013年

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    掲載種別:研究論文(学術雑誌)  

    We search for CP violation in the decay D+ → K S0K+ using a data sample with an integrated luminosity of 977 fb-1 collected with the Belle detector at the KEKB e+ e- asymmetric-energy collider. No CP violation has been observed and the CP asymmetry in D+ → KS0K+ decay is measured to be (-0.25±0.28±0. 14)%, which is the most sensitive measurement to date. After subtracting CP violation due to K0-K̄0 mixing, the CP asymmetry in D+ → K̄0K+ decay is found to be (+0.08±0.28±0.14)%. © 2013 SISSA.

    DOI: 10.1007/JHEP02(2013)098

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  • Tau Decays at Belle 査読

    K. Hayasaka, K. Inami, Y. Miyazaki

    QUEST FOR THE ORIGIN OF PARTICLES IN THE UNIVERSE   343 - 346   2013年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:WORLD SCIENTIFIC PUBL CO PTE LTD  

    We report recent results on the analysis for tau decays obtained Belle experiment. We have searched for the lepton-flavor-violating tau decays using an about 1000 fb(-1) data sample and achieved the sensitivity of O(10(-8)) on the branching ratios.

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  • Results and prospects on lepton flavor violation at Belle/Belle II 査読

    Kiyoshi Hayasaka

    XIII INTERNATIONAL WORKSHOP ON NEUTRINO FACTORIES, SUPER BEAMS AND BETA BEAMS (NUFACT11)   408   2013年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:IOP PUBLISHING LTD  

    We report the results and prospects on the tau lepton flavor violation at Belle and Belle II.

    DOI: 10.1088/1742-6596/408/1/012069

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  • Evidence for the eta(b)(2S) and Observation of h(b)(1P) -&gt; eta(b)(1S)gamma and h(b)(2P) -&gt; eta(b)(1S)gamma 査読

    R. Mizuk, D. M. Asner, A. Bondar, T. K. Pedlar, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, A. Bay, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, G. Bonvicini, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, K. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, P. Kapusta, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Koblitz, P. Kodys, S. Korpar, R. T. Kouzes, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, G. B. Mohanty, D. Mohapatra, A. Moll, N. Muramatsu, R. Mussa, M. Nakao, Z. Natkaniec, C. Ng, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, M. Roehrken, Y. Sakai, S. Sandilya, D. Santel, T. Sanuki, Y. Sato, O. Schneider, C. Schwanda, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, K. Tanida, G. Tatishvili, Y. Teramoto, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, J. Yamaoka, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhilich

    PHYSICAL REVIEW LETTERS   109 ( 23 )   232002-1 - 232002-6   2012年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first evidence for the eta(b)(2S) using the h(b)(2P) -&gt; eta(b)(2S)gamma transition and the first observation of the h(b)(1P) -&gt; eta(b)(1S)gamma and h(b)(2P) -&gt; eta(b)(1S)gamma transitions. The mass and width of the eta(b)(1S) and eta(b)(2S) are measured to be m(eta b(1S)) = (9402.4 +/- 1.5 +/- 1.8) MeV/c(2), m eta(b(2S)) = (9999.0 +/- 3.5 +/- 2.8 -1.9) MeV/c(2), and Gamma(eta b)(1S) = (10.8(-3.7-2.0)(+4.0+4.5)) MeV. We also update the h(b)(1P) and h(b)(2P) mass measurements. We use a 133.4 fb(-1) data sample collected at energies near the d5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevLett.109.232002

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  • Measurement of gamma gamma* -&gt; pi(0) transition form factor at Belle 査読

    S. Uehara, Y. Watanabe, H. Nakazawa, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. -S. Cho, K. Cho, Y. Choi, J. Dalseno, Z. Dolezal, Z. Drasal, S. Eidelman, D. Epifanov, J. E. Fast, M. Feindt, V. Gaur, N. Gabyshev, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, S. Koblitz, P. Kodys, S. Korpar, R. T. Kouzes, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S-H. Lee, J. Li, Y. Li, J. Libby, C. -L. Lim, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. K. Park, K. S. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, K. Prothmann, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, J. B. Singh, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, T. Sumiyoshi, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, Y. Unno, S. Uno, Y. Usov, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, C. H. Wang, P. Wang, M. Watanabe, K. M. Williams, E. Won, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   86 ( 9 )   092007-1 - 092007-27   2012年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the process gamma gamma* -&gt; pi(0) with a 759 fb(-1) data sample recorded with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The pion transition form factor, F(Q(2)), is measured for the kinematical region 4 GeV2 &lt;= Q(2) &lt;= 40 GeV2, where -Q(2) is the invariant-mass squared of a virtual photon. The measured values of Q(2)vertical bar F(Q(2))vertical bar agree well with the previous measurements below Q(2) similar or equal to 9 GeV2 but do not exhibit the rapid growth in the higher Q(2) region seen in another recent measurement, which exceeds the asymptotic QCD expectation by as much as 50%.

    DOI: 10.1103/PhysRevD.86.092007

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  • Evidence for B <sup>-</sup>→Ds+K <sup>-</sup>ℓ <sup>-</sup>ν <inf>̄ℓ</inf> and search for B <sup>-</sup>→Ds*+K <sup>-</sup>ℓ <sup>-</sup>ν <inf>̄ℓ</inf> 査読

    Stypula J, Rozanska M, Adachi I, Adamczyk K, Aihara H, Asner D.M, Aushev T, Bakich A.M, Bhardwaj V, Bhuyan B, Bischofberger M, Bondar A, Bonvicini G, Bozek A, Bra?ko M, Browder T.E, Chang M.-C, Chang P, Chekelian V, Chen A, Chen P, Cheon B.G, Chistov R, Cho I.-S, Cho K, Choi Y, Dalseno J, Danilov M, Dingfelder J, Doleal Z, Dr{\'a}sal Z, Drutskoy A, Eidelman S, Farhat H, Fast J.E, Gaur V, Gabyshev N, Gillard R, Goh Y.M, Golob B, Haba J, Hayasaka K, Hayashii H, Horii Y, Hoshi Y, Hou W.-S, Hsiung Y.B, Hyun H.J, Iijima T, Inami K, Ishikawa A, Itoh R, Iwabuchi M, Iwasaki Y, Julius T, Kang J.H, Kapusta P, Kawasaki T, Kichimi H, Kiesling C, Kim H.J, Kim J.B, Kim J.H, Kim K.T, Kim Y.J, Kinoshita K, Ko B.R, Kody P, Korpar S, Kouzes R.T, Krian P, Krokovny P, Kuhr T, Kumita T, Kuzmin A, Kwon Y.-J, Lee S.-H, Li J, Li Y, Libby J, Liu C, Liu Y, Liu Z.Q, Liventsev D, Louvot R, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Mohanty G.B, Moll A, Muramatsu N, Nakano E, Nakao M, Natkaniec Z, Ng C, Nishida S, Nishimura K, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Onuki Y, Pakhlov P, Pakhlova G, Park C.W, Park H, Park H.K, Pedlar T.K, Pestotnik R, Petri? M, Piilonen L.E, Ritter M, R{\"o}hrken M, Ryu S, Sahoo H, Sakai Y, Sandilya S, Santel D, Sanuki T, Sato Y, Schneider O, Schwanda C, Senyo K, Seon O, Sevior M.E, Shapkin M, Shen C.P, Shibata T.-A, Shiu J.-G, Shwartz B, Sibidanov A, Simon F, Smerkol P, Sohn Y.-S, Sokolov A, Solovieva E, Stani? S, Stari? M, Sumihama M, Sumiyoshi T, Teramoto Y, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Vanhoefer P, Varner G, Varvell K.E, Vorobyev V, Wang P, Wang X.L, Watanabe M, Watanabe Y, Wiechczynski J, Williams K.M, Won E, Yabsley B.D, Yamamoto H, Yamashita Y, Zhang Z.P, Zhilich V, Zhulanov V, Zupanc A

    Physical Review D - Particles, Fields, Gravitation and Cosmology   86 ( 7 )   2012年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.86.072007

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Evidence for ${B}^{-}{\rightarrow}{D}_{s}^{+}{K}^{-}{ { \ell } }^{-}{\overline{ { \nu } } }_{ { \ell } }$ and search for ${B}^{-}{\rightarrow}{D}_{s}^{*+}{K}^{-}{ { \ell } }^{-}{\overline{ { \nu } } }_{ { \ell } }$ 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   86 ( 7 )   072007-1 - 072007-7   2012年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.86.072007

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  • Evidence for CP Violation in the Decay D+ -&gt; K-S(0)pi(+) (vol 109, 021601, 2012) 査読

    B. R. Ko, E. Won, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. -S. Cho, K. Cho, Y. Choi, Z. Dolezal, Z. Drasal, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, Y. Li, J. Libby, C. -L. Lim, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, K. S. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, M. Ritter, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, Y. Sato, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, S. Tanaka, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, H. Yamamoto, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   109 ( 11 )   2012年9月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    DOI: 10.1103/PhysRevLett.109.119903

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  • Erratum: Measurement of azimuthal asymmetries in inclusive production of hadron pairs in e <sup>+</sup>e <sup>-</sup> annihilation at √s=10.58GeV 査読

    R. Seidl, M. Grosse Perdekamp, A. Ogawa, I. Adachi, H. Aihara, S. Bahinipati, A. M. Bakich, W. Bartel, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, R. Chistov, I. S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, B. Golob, H. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, A. Ishikawa, Y. Iwasaki, D. H. Kah, H. Kaji, H. Kawai, T. Kawasaki, H. J. Kim, H. O. Kim, Y. I. Kim, Y. J. Kim, P. Križan, R. Kumar, Y. J. Kwon, S. H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, C. Liu, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, L. S. Peak, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, J. B. Singh, S. Stanič, M. Starič, T. Sumiyoshi, M. Tanaka, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno

    Physical Review D - Particles, Fields, Gravitation and Cosmology   86 ( 3 )   2012年8月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.86.039905

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  • Search for B -&gt; phi pi decays 査読

    J. H. Kim, M. Nakao, I. Adachi, K. Adamczyk, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, K. Belous, B. Bhuyan, M. Bischofberger, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. -S. Cho, K. Cho, Y. Choi, J. Dalseno, J. Dingfelder, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, V. Gaur, N. Gabyshev, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, Y. J. Kim, B. R. Ko, P. Kodys, S. Korpar, R. T. Kouzes, P. Krokovny, T. Kuhr, A. Kuzmin, P. Kvasnicka, Y. -J. Kwon, S. -H. Lee, J. Li, Y. Li, J. Libby, C. -L. Lim, Y. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, A. Moll, N. Muramatsu, E. Nakano, Z. Natkaniec, C. Ng, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, S. Ryu, H. Sahoo, Y. Sakai, S. Sandilya, T. Sanuki, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, J. B. Singh, P. Smerkol, Y. -S. Sohn, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, Y. Teramoto, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, P. Vanhoefer, G. Varner, V. Vorobyev, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   86 ( 3 )   031101-1 - 031101-6   2012年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report on a search for the charmless decays B+ -&gt; phi pi(+) and B-0 -&gt; phi pi(0) that are strongly suppressed in the standard model. The analysis is based on a data sample of 657 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We find no significant signal and set upper limits of 3.3 X 10(-7) for B+ -&gt; phi pi(+) and 1.5 x 10-7 for B-0 -&gt; phi pi(0) at the 90% confidence level.

    DOI: 10.1103/PhysRevD.86.031101

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  • Erratum: Measurement of azimuthal asymmetries in inclusive production of hadron pairs in e <sup>+</sup>e <sup>-</sup> annihilation at √s=10.58GeV 査読

    Seidl R, Grosse Perdekamp M, Ogawa A, Adachi I, Aihara H, Bahinipati S, Bakich A.M, Bartel W, Bitenc U, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chao Y, Chen A, Cheon B.G, Chistov R, Cho I.-S, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Golob B, Ha H, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hou W.-S, Hyun H.J, Ishikawa A, Iwasaki Y, Kah D.H, Kaji H, Kawai H, Kawasaki T, Kim H.J, Kim H.O, Kim Y.I, Kim Y.J, Kri?an P, Kumar R, Kwon Y.-J, Kyeong S.-H, Lange J.S, Lee J.S, Lee M.J, Lesiak T, Li J, Limosani A, Liu C, Liventsev D, Mandl F, McOnie S, Medvedeva T, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney G.R, Nakano E, Nakazawa H, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Pakhlov P, Pakhlova G, Palka H, Park C.W, Park H, Park H.K, Peak L.S, Piilonen L.E, Sahoo H, Sakai Y, Schneider O, Sekiya A, Senyo K, Sevior M.E, Shapkin M, Shen C.P, Shiu J.-G, Singh J.B, Stani? S, Stari? M, Sumiyoshi T, Tanaka M, Teramoto Y, Tikhomirov I, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Vervink K, Wang C.H, Wang P, Wang X.L, Watanabe Y, Wedd R, Won E, Yabsley B.D, Yamashita Y, Zhang Z.P, Zhilich V, Zivko T, Zupanc A, Zyukova O

    Physical Review D - Particles, Fields, Gravitation and Cosmology   86 ( 3 )   2012年8月

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  • Search for B-0 decays to invisible final states at Belle 査読

    C-L. Hsu, P. Chang, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, B. Bhuyan, M. Bischofberger, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M-C. Chang, Y. Chao, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I-S. Cho, K. Cho, Y. Choi, J. Dalseno, J. Dingfelder, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, D. Epifanov, S. Esen, H. Farhat, J. E. Fast, V. Gaur, N. Gabyshev, R. Gillard, Y. M. Goh, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W-S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, Y. J. Kim, B. R. Ko, P. Kodys, S. Korpar, P. Krokovny, T. Kuhr, A. Kuzmin, P. Kvasnicka, Y-J. Kwon, S-H. Lee, J. Li, Y. Li, J. Libby, Y. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, A. Moll, N. Muramatsu, E. Nakano, M. Nakao, Z. Natkaniec, C. Ng, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, S. Sandilya, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, T-A. Shibata, J-G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, J. B. Singh, P. Smerkol, Y-S. Sohn, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, P. Vanhoefer, G. Varner, V. Vorobyev, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov

    PHYSICAL REVIEW D   86 ( 3 )   032002-1 - 032002-6   2012年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a search for B-0 decays into invisible final states using a data sample of 657 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e(+) e(-) collider. The signal is identified by fully reconstructing a hadronic decay of the accompanying B meson and requiring no other particles in the event. No significant signal is observed, and we obtain an upper limit of 1.3 x 10(-4) at the 90% confidence level for the branching fraction of invisible B-0 decay.

    DOI: 10.1103/PhysRevD.86.032002

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  • Erratum: Evidence for CP violation in the decay D+ <sup>→KS0π+</sup> (Physical Review Letters (2012) 109 (021601)) 査読

    Ko B.R, Won E, Adachi I, Aihara H, Asner D.M, Aulchenko V, Aushev T, Aziz T, Bakich A.M, Belous K, Bhardwaj V, Bhuyan B, Bischofberger M, Bondar A, Bonvicini G, Bozek A, Bra?ko M, Browder T.E, Chang M.-C, Chen A, Chen P, Cheon B.G, Chilikin K, Cho I.-S, Cho K, Choi Y, Doleal Z, Dr{\'a}sal Z, Eidelman S, Fast J.E, Gaur V, Gabyshev N, Garmash A, Goh Y.M, Golob B, Haba J, Hayasaka K, Hayashii H, Horii Y, Hoshi Y, Hou W.-S, Hsiung Y.B, Hyun H.J, Iijima T, Ishikawa A, Itoh R, Iwabuchi M, Iwasaki Y, Iwashita T, Julius T, Kang J.H, Kawasaki T, Kiesling C, Kim H.O, Kim J.B, Kim K.T, Kim M.J, Kim Y.J, Kinoshita K, Koblitz S, Kody P, Korpar S, Krian P, Krokovny P, Kuhr T, Kuzmin A, Kwon Y.-J, Lange J.S, Lee S.-H, Li J, Li Y, Libby J, Lim C.-L, Liu C, Liu Y, Liu Z.Q, Liventsev D, Louvot R, Matvienko D, Miyazaki Y, Mizuk R, Mohanty G.B, Moll A, Mori T, Muramatsu N, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nishimura K, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Onuki Y, Ostrowicz W, Pakhlov P, Pakhlova G, Park C.W, Park H.K, Park K.S, Pedlar T.K, Pestotnik R, Petri? M, Piilonen L.E, Poluektov A, Ritter M, R{\"o}hrken M, Ryu S, Sahoo H, Sakai K, Sakai Y, Sanuki T, Sato Y, Schneider O, Schwanda C, Schwartz A.J, Seidl R, Senyo K, Sevior M.E, Shapkin M, Shebalin V, Shen C.P, Shibata T.-A, Shiu J.-G, Shwartz B, Sibidanov A, Simon F, Smerkol P, Sohn Y.-S, Sokolov A, Solovieva E, Stani? S, Stari? M, Sumiyoshi T, Tanaka S, Tatishvili G, Teramoto Y, Trabelsi K, Tsuboyama T, Uchida M, Uehara S, Unno Y, Uno S, Varner G, Varvell K.E, Vinokurova A, Vorobyev V, Wang C.H, Wang P, Wang X.L, Watanabe M, Watanabe Y, Yamamoto H, Yamashita Y, Yuan C.Z, Zhang C.C, Zhang Z.P, Zhilich V, Zhulanov V, Zupanc A

    Physical Review Letters   109 ( 2 )   2012年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.109.021601

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Evidence for CP Violation in the Decay D+ -&gt; K-S(0)pi(+) 査読

    B. R. Ko, E. Won, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. -S. Cho, K. Cho, Y. Choi, Z. Dolezal, Z. Drasal, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, Y. Li, J. Libby, C. -L. Lim, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, K. S. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, M. Ritter, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, Y. Sato, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T.-A. Shibata, J.-G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, S. Tanaka, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, H. Yamamoto, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   109 ( 2 )   021601-1 - 021601-6   2012年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We observe evidence for CP violation in the decay D+ -&gt; K-S(0)pi(+) using a data sample with an integrated luminosity of 977 fb(-1) collected by the Belle detector at the KEKB e(+) e(-) asymmetric-energy collider. The CP asymmetry in the decay is measured to be (-0.363 +/- 0.094 +/- 0.067)%, which is 3.2 standard deviations away from zero, and is consistent with the expected CP violation due to the neutral kaon in the final state.

    DOI: 10.1103/PhysRevLett.109.021601

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  • Observation of New Resonant Structures in gamma gamma -&gt; omega phi, phi phi, and omega omega 査読

    Z. Q. Liu, C. P. Shen, C. Z. Yuan, T. Iijima, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, P. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, K. Cho, S. -K. Choi, Y. Choi, J. Dalseno, Z. Dolezal, Z. Drasal, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, X. R. Li, Y. Li, J. Libby, C. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, R. Mussa, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, C. Ng, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, Y. Sato, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, A. Vinokurova, V. Vorobyev, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, Y. Yamashita, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov

    PHYSICAL REVIEW LETTERS   108 ( 23 )   232001-1 - 232001-7   2012年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The processes gamma gamma -&gt; omega phi,phi phi, and omega omega are measured using an 870 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Production of vector meson pairs is clearly observed and their cross sections are measured for masses that range from threshold to 4.0 GeV. In addition to signals from well established spin-zero and spin-two charmonium states, there are resonant structures below charmonium threshold, which have not been previously observed. We report a spin-parity analysis for the new structures and determine the products of the eta(c), chi(c0), and chi(c2) two-photon decay widths and branching fractions to omega phi,phi phi, and omega omega.

    DOI: 10.1103/PhysRevLett.108.232001

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  • Measurement of B-0 -&gt; J/psi eta((')) and constraint on the eta - eta ' mixing angle 査読

    M. -C. Chang, Y. -C. Duh, J. -Y. Lin, I. Adachi, K. Adamczyk, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, V. Bhardwaj, B. Bhuyan, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, A. Chen, K. -F. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, J. E. Fast, V. Gaur, A. Garmash, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, N. Katayama, T. Kawasaki, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Z. Q. Liu, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, K. S. Park, T. K. Pedlar, T. Peng, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, A. Sibidanov, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, S. Tanaka, G. Tatishvili, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, V. Vorobyev, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   85 ( 9 )   091102-1 - 091102-6   2012年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We measure the branching fractions of B-0 -&gt; J/psi eta((')) decays with the complete Belle data sample of 772 x 10(6) B (B) over bar events collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The results for the branching fractions are: B(B-0 -&gt; J/psi eta) = (12.3 +/-(1.8)(1.7)+/- 0.7) x 10(-6) and B(B-0 -&gt; J/psi eta') &lt; 7.4 x 10(-6) at 90% confidence level. The eta-eta' mixing angle is constrained to be less than 42.2 degrees at 90% confidence level.

    DOI: 10.1103/PhysRevD.85.091102

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  • First Observation of B-s(0) -&gt; J/psi eta and B-s(0) -&gt; J/psi eta ' 査読

    J. Li, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, O. Brovchenko, T. E. Browder, M. -C. Chang, A. Chen, P. Chen, B. G. Cheon, R. Chistov, K. Cho, S. -K. Choi, Y. Choi, J. Dalseno, Z. Dolezal, A. Drutskoy, S. Eidelman, S. Esen, J. E. Fast, V. Gaur, A. Garmash, Y. M. Goh, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, A. Kuzmin, Y. -J. Kwon, J. S. Lange, M. J. Lee, S. -H. Lee, Y. Li, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, I. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, G. Pakhlova, C. W. Park, H. K. Park, K. S. Park, T. K. Pedlar, T. Peng, R. Pestotnik, M. Petric, L. E. Piilonen, M. Prim, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, Y. Sato, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, S. Tanaka, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, V. Vorobyev, A. Vossen, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, J. Wicht, K. M. Williams, E. Won, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   108 ( 18 )   181808-1 - 181808-5   2012年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report first observations of B-s(0) -&gt; J/psi eta and B-s(0) -&gt; J/psi eta'. The results are obtained from 121.4 fb(-1) of data collected at the Gamma(5S) resonance with the Belle detector at the KEKB e(+)e(-) collider. We obtain the branching fractions B(B-s(0)-&gt; J/psi eta')=[5.10 +/- 0.50(stat)+/- 0.25(syst)(-0.79)(+1.14)(N-Bs(*)(B) over bars(*)] X 10(-4,) B(B-s(0)-&gt; J/psi eta') = [3.71 +/- 0.61(stat)+/-(+0.83)(-0.57)(N-Bs(*)(B) over bars(*)] X 10(-4). The ratio of the two branching fractions is measured to be B(B-s -&gt; J/psi eta')/B(B-s -&gt; J/psi eta) = 0.73 +/- 0.14(stat) +/- 0.02(syst).

    DOI: 10.1103/PhysRevLett.108.181808

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  • Search for Time-Dependent CPT Violation in Hadronic and Semileptonic B Decays 査読

    T. Higuchi, K. Sumisawa, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bay, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, O. Brovchenko, T. E. Browder, M.-C. Chang, P. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I.-S. Cho, K. Cho, S.-K. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, B. Golob, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, P. Kapusta, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y.-J. Kwon, J. S. Lange, S.-H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, Y. Nagasaka, Y. Nakahama, M. Nakao, H. Nakazawa, Z. Natkaniec, C. Ng, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, K. S. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Prim, M. Ritter, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, T. Sanuki, Y. Sato, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T.-A. Shibata, J.-G. Shiu, B. Shwartz, A. Sibidanov, R. Sinha, P. Smerkol, Y.-S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, S. Tanaka, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov

    PHYSICAL REVIEW D   85 ( 7 )   071105   2012年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a new sensitive search for C P T violation, which includes improved measurements of the C P T-violating parameter z and the total decay-width difference normalized to the averaged width delta(d) delta(d) of the two B-d mass eigenstates . The results are based on a data sample of 535 x 10(6) B B pairs collected at the Epsilon(4 S) resonance with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. We obtain Re (z) = [+1.9 +/- 3.7 (stat) +/- 3.3 (syst)] x 10(&gt;-2), qm (z) = [-5.7 +/- 3.3 (stat) +/- 3.3 (syst)] x 10(-3), and delta(d) / delta(d) = [-1.7 +/- 1.8 (stat) +/- 1.1 (syst)] x 10(-2), all of which are consistent with zero. This is the most precise single measurement of these parameters in the neutral B-meson system to date.

    DOI: 10.1103/PhysRevD.85.071105

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  • Precise Measurement of the $CP$ Violation Parameter ${sin}・ソ2{ { \phi } }_{1}$ in ${B}^{0}{\rightarrow}(c\overline{c}){K}^{0}$ Decays 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. Lett.   108 ( 17 )   171802-1 - 171802-7   2012年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.108.171802

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  • Search for double charmonium decays of the P-wave spin-triplet bottomonium states 査読

    C. P. Shen, C. Z. Yuan, T. Iijima, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, B. Bhuyan, M. Bischofberger, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, K. Cho, S. -K. Choi, Y. Choi, J. Dalseno, Z. Drasal, A. Drutskoy, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, A. Ishikawa, R. Itoh, M. Iwabuchi, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, J. Libby, C. -L. Lim, C. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, G. Pakhlova, C. W. Park, H. K. Park, T. K. Pedlar, M. Petric, L. E. Piilonen, A. Poluektov, M. Ritter, M. Roehrken, H. Sahoo, Y. Sakai, T. Sanuki, Y. Sato, O. Schneider, C. Schwanda, K. Senyo, O. Seon, M. Shapkin, T. -A. Shibata, J. -G. Shiu, A. Sibidanov, F. Simon, J. B. Singh, P. Smerkol, Y. -S. Sohn, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, T. Tsuboyama, M. Uchida, S. Uehara, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, C. H. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, E. Won, Y. Yamashita, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   85 ( 7 )   2012年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using a sample of 158 x 10(6) Y(2S) events collected with the Belle detector, we search for the first time for double-charmonium decays of the P-wave spin-triplet bottomonium states (Y(2S) -&gt; gamma chi(bJ), chi(bJ) -&gt; J/psi J/psi, J/psi psi', psi'psi' for J 0, 1, and 2). No significant chi(bJ) signal is observed in the double-charmonium mass spectra, and we obtain the following upper limits: B(chi(bJ) -&gt; J/psi J/psi) &lt; 7.1 x 10(-5), 2.7 x 10(-5), 4.5 x 10(-5), B(chi(bJ) -&gt; J/psi psi') &lt; 1.2 x 10(-4), 1. 7 x 10(-5), 4.9 x 10(-5), B(chi(bJ) -&gt; psi'psi') &lt; 3.1 x 10(-5), 6.2 x 10(-5), 1.6 x 10(-5) for J = 0, 1, and 2, respectively, at the 90% confidence level. These limits are significantly lower than the central values (with uncertainties of 50% to 70%) predicted using the light cone formalism but are consistent with calculations using the nonrelativistic QCD (NRQCD) factorization approach.

    DOI: 10.1103/PhysRevD.85.071102

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Recent LFV results on tau lepton from Belle 査読

    K. Hayasaka

    Nuclear Physics B - Proceedings Supplements   225-227   169 - 172   2012年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We report on the recent results of searches for lepton-flavor-violating . τ decays with the world-largest data samples accumulated by the Belle detector. Our sensitivity reaches . O(10-8) and it corresponds to about one hundred times more sensitive search than CLEO's. Also, we discuss the future prospects on the SuperKEKB/Belle II experiments, where we expect a forty times higher luminosity. © 2012 Elsevier B.V.

    DOI: 10.1016/j.nuclphysbps.2012.02.036

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  • Measurement of the $CP$-Violation Parameter ${sin}・ソ2{ { \phi } }_{1}$ with a New Tagging Method at the ${\Upsilon}(5S)$ Resonance 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. Lett.   108 ( 17 )   171801-1 - 171801-6   2012年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.108.171801

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  • Observation of Two Charged Bottomoniumlike Resonances in Y(5S) Decays 査読

    A. Bondar, A. Garmash, R. Mizuk, D. Santel, K. Kinoshita, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, T. Aziz, A. M. Bakich, E. Barberio, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, K. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, A. Drutskoy, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, Y. Hoshi, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, N. Kobayashi, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, J. S. Lange, S. -H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, H. Miyata, Y. Miyazaki, G. B. Mohanty, A. Moll, N. Muramatsu, R. Mussa, M. Nakao, Z. Natkaniec, S. Neubauer, M. Niiyama, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, T. K. Pedlar, M. Petric, L. E. Piilonen, A. Poluektov, M. Prim, M. Ritter, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, D. Santel, T. Sanuki, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Sumihama, T. Sumiyoshi, S. Tanaka, G. Tatishvili, Y. Teramoto, I. Tikhomirov, M. Uchida, S. Uehara, T. Uglov, Y. Ushiroda, S. E. Vahsen, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   108 ( 12 )   122001-1 - 122001-6   2012年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the observation of two narrow structures in the mass spectra of the pi(+/-) Y(nS) (n = 1, 2, 3) and pi(+/-) h(b)(mP) (m = 1, 2) pairs that are produced in association with a single charged pion in Y(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M-1 = (10 607.2 +/- 2.0) MeV/c(2), Gamma(1) =(18.4 +/- 2.4) MeV, and M-2 = (10 652.2 +/- 1.5) MeV/c(2), Gamma(2) = (11.5 +/- 2.2) MeV. The results are obtained with a 121.4 fb(-1) data sample collected with the Belle detector in the vicinity of the Y(5S) resonance at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevLett.108.122001

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  • Search for CP Violation in D-+/- Meson Decays to phi pi(+/-) 査読

    M. Staric, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, A. Bay, V. Bhardwaj, B. Bhuyan, A. Bozek, M. Bracko, T. E. Browder, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I-S Cho, K. Cho, Y. Choi, Z. Dolezal, Z. Drasal, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, B. Golob, J. Haba, K. Hayasaka, Y. Horii, Y. Hoshi, W-S Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, T. Kumita, Y-J Kwon, J. S. Lange, S-H Lee, J. Li, Y. Li, J. Libby, C. Liu, Z. Q. Liu, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, E. Nakano, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, H. K. Park, K. S. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T-A Shibata, J-G Shiu, B. Shwartz, F. Simon, P. Smerkol, Y-S Sohn, A. Sokolov, S. Stanic, M. Sumihama, K. Sumisawa, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, A. Vossen, C. H. Wang, M-Z Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   108 ( 6 )   071801-1 - 071801-6   2012年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We search for CP violation in Cabibbo-suppressed charged D meson decays by measuring the difference between the CP-violating asymmetries for the Cabibbo-suppressed decays D-+/- -&gt; K+K-pi(+/-) and the Cabibbo-favored decays D1/s -&gt; K+K-pi(+/-) in the K+K- mass region of the phi resonance. Using 955 fb(-1) of data collected with the Belle detector, we obtain A(CP)(D+-&gt;phi pi+) (+0.51 +/- 0.28 +/- 0.05)%. The measurement improves the sensitivity of previous searches by more than a factor of 5. We find no evidence for direct CP violation.

    DOI: 10.1103/PhysRevLett.108.071801

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  • First Observation of the P-Wave Spin-Singlet Bottomonium States h(b)(1P) and h(b)(2P) 査読

    I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, T. Aziz, A. M. Bakich, E. Barberio, K. Belous, V. Bhardwaj, B. Bhuyan, A. Bondar, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, K. Cho, Y. Choi, J. Dalseno, M. Danilov, Z. Drasal, A. Drutskoy, S. Eidelman, D. Epifanov, S. Esen, J. E. Fast, M. Feindt, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, B. Golob, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, M. Iwabuchi, Y. Iwasaki, I. Jaegle, T. Julius, J. H. Kang, N. Katayama, T. Kawasaki, H. Kichimi, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, S. Koblitz, S. Korpar, P. Krizan, T. Kuhr, T. Kumita, A. Kuzmin, Y-J. Kwon, J. S. Lange, S. -H. Lee, J. Li, J. Libby, C. Liu, D. Liventsev, R. Louvot, J. MacNaughton, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, R. Mussa, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, M. Ritter, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, G. Tatishvili, Y. Teramoto, I. Tikhomirov, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, S. E. Vahsen, G. Varner, K. E. Varvell, A. Vinokurova, C. H. Wang, X. L. Wang, Y. Watanabe, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   108 ( 3 )   2012年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observations of the spin-singlet bottomonium states h(b)(1P) and h(b)(2P). The states are produced in the reaction e(+)e(-) --&gt; h(b)(nP)pi(+)pi(-) using a 121.4 fb(-1) data sample collected at energies near the Y(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We determine M[h(b)(1P)] = (9898.2(-1.0-1.1)(+1.1+1.0)) MeV/c(2) and M[h(b)(2P)] = (10 259.8 +/- 0.6(-1.0)(+1.4)) MeV/c(2), which correspond to P-wave hyperfine splittings Delta M-HF = (+1.7 +/- 1.5) and (+0.5(-1.2)(+1.6)) MeV/c(2), respectively. The significances of the h(b)(1P) and h(b)(2P) are 5.5 sigma and 11.2 sigma, respectively. We find that the production of the h(b)(1P) and h(b)(2P) is not suppressed relative to the production of the Y(1S), Y(2S), and Y(3S).

    DOI: 10.1103/PhysRevLett.108.032001

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    その他リンク: http://orcid.org/0000-0001-6373-2346

  • Evidence for Direct CP Violation in B-+/- -&gt; eta h(+/-) and Observation of B-0 -&gt; eta K-0 査読

    C. -T. Hoi, P. Chang, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, K. -F. Chen, P. Chen, G. Cheon, K. Chilikin, K. Cho, Y. Choi, M. Danilov, Z. Drasal, A. Drutskoy, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, M. Iwabuchi, Y. Iwasaki, T. Iwashita, J. H. Kang, T. Kawasaki, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, P. Kodys, S. Korpar, P. Krizan, T. Kuhr, T. Kumita, Y. -J. Kwon, S. -H. Lee, J. Li, J. Libby, Z. Q. Liu, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, G. B. Mohanty, A. Moll, E. Nakano, M. Nakao, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, C. W. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, H. Sahoo, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, M. Staric, M. Sumihama, S. Tanaka, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, G. Varner, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, Y. Yamashita, Y. Yusa, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   108 ( 3 )   031801-1 - 031801-6   2012年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurements of the branching fractions and CP asymmetries for B-+/- -&gt; eta h(+/-) (h = K or pi) and the observation of the decay B-0 -&gt; eta K-0 from the final data sample of 772 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured branching fractions are B(B-+/- -&gt; eta K-+/-) = (2.12 +/- 0.23 +/- 0.11) x 10(-6), B(B-+/- -&gt; eta pi(+/-)) = (4.07 +/- 0.26 +/- 0.21) x 10(-6), and B(B-0 -&gt; eta K-0) = (1.27(-0.29)(+0.33) +/- 0.08) x 10(-6), where the last decay is observed for the first time with a significance of 5.4 standard deviations (sigma). We also find evidence for CP violation in the charged B modes, A(CP)(B-+/- -&gt; eta K-+/-) = -0.38 +/- 0.11 +/- 0.01 and A(CP)(B-+/- -&gt; eta pi(+/-)) = -0.19 +/- 0.06 +/- 0.01 with significances of 3.8 sigma and 3.0 sigma, respectively. For all measurements, the first and second uncertainties are statistical and systematic, respectively.

    DOI: 10.1103/PhysRevLett.108.031801

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  • Observation of D+ -&gt; K+eta(()&apos;()) and Search for CP Violation in D+ -&gt; pi(+)eta(()&apos;()) Decays 査読

    E. Won, B. R. Ko, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. -S. Cho, K. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, N. J. Joshi, T. Julius, J. H. Kang, N. Katayama, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, N. Kobayashi, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, M. J. Lee, S. -H. Lee, J. Li, Y. Li, J. Libby, C. -L. Lim, C. Liu, Y. Liu, D. Liventsev, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, K. S. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, J. B. Singh, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, S. Suzuki, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, S. E. Vahsen, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, B. D. Yabsley, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   107 ( 22 )   221801-1 - 221801-6   2011年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of the doubly Cabibbo-suppressed decays D+ -&gt; K+eta(()&apos;()) using a 791 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The ratio of the branching fractions of doubly Cabibbo-suppressed relative to singly Cabibbo-suppressed D+ -&gt; pi(+)eta(()&apos;()) decays are B(D+ -&gt; K+eta) / B(D+ -&gt; pi(+)eta) =(3.06 +/- 0.43 +/- 0.14)% and B(D+ -&gt; K+eta&apos;)/B(D+-&gt;pi(+)eta&apos;) = (3.77 +/- 0.39 +/- 0.10)%. From these, we find that the relative final-state phase difference between the tree and annihilation amplitudes in D+ decays, delta(TA), is (72 +/- 9)degrees or (288 +/- 9)degrees. We also report the most precise measurements of CP asymmetries to date: A(CP)(D+-&gt;pi+eta) = (+1.74 +/- 1.13 +/- 0.19)% and A(CP)(D+-&gt;pi+eta&apos;) = (-0.12 +/- 1.12 +/- 0.17)%.

    DOI: 10.1103/PhysRevLett.107.221801

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  • Search for lepton-number-violating B<sup>+</sup>→D<sup>-</sup><sup>+</sup>′<sup>+</sup> decays 査読

    O. Seon, Y. J. Kwon, T. Iijima, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, O. Brovchenko, T. E. Browder, P. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. S. Cho, K. Cho, S. K. Choi, Y. Choi, J. Dalseno, Z. Doleal, A. Drutskoy, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, Y. M. Goh, B. Golob, J. Haba, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, N. J. Joshi, T. Julius, J. H. Kang, N. Katayama, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, S. Koblitz, P. Kody, S. Korpar, P. Krian, T. Kuhr, T. Kumita, A. Kuzmin, S. H. Kyeong, J. S. Lange, M. J. Lee, S. H. Lee, J. Li, Y. Li, J. Libby, C. L. Lim, C. Liu, Y. Liu, D. Liventsev, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec

    Physical Review D - Particles, Fields, Gravitation and Cosmology   84 ( 7 )   071106-1 - 071106-7   2011年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We perform the first search for lepton-number-violating B +→D-+′+ decays, where and ′ stand for e or μ, using 772×106 BB̄ pairs accumulated at the Υ(4S) resonance with the Belle detector at the KEKB e+e- collider. No evidence for these decays has been found. Assuming uniform three-body phase space distributions for the D-+′+ decays, we set the following upper limits on the branching fractions at 90% confidence level: B(B+→D-e+e+)<2. 6×10-6, B(B+→D-e+μ +)<1.8×10-6 and B(B+→D -μ+μ+)<1.1×10-6. © 2011 American Physical Society.

    DOI: 10.1103/PhysRevD.84.071106

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  • First observation of radiative B-0 -&gt; phi K-0 gamma decays and measurements of their time-dependent CP violation 査読

    H. Sahoo, T. E. Browder, I. Adachi, D. M. Asner, V. Aulchenko, A. M. Bakich, E. Barberio, K. Belous, V. Bhardwaj, B. Bhuyan, A. Bondar, A. Bozek, M. Bracko, O. Brovchenko, A. Chen, P. Chen, B. G. Cheon, K. Cho, Y. Choi, J. Dalseno, Z. Dolezal, Z. Drasal, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, N. J. Joshi, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, M. J. Lee, S. -H. Lee, J. Li, Y. Li, J. Libby, C. -L. Lim, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, T. Mori, M. Nakao, Z. Natkaniec, C. Ng, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, T. Peng, R. Pestotnik, M. Petric, L. E. Piilonen, M. Prim, M. Roehrken, S. Ryu, K. Sakai, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, S. E. Vahsen, G. Varner, A. Vinokurova, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, P. Zhou, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   84 ( 7 )   071101-1 - 071101-6   2011年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of the radiative decay B-0 -&gt; phi K-0 gamma using a data sample of 772 x 10(6) B (B) over bar pairs collected at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a signal of 37 +/- 8 events with a significance of 5.4 standard deviations including systematic uncertainties. The measured branching fraction is B(B-0 -&gt;phi K-0 gamma) = (2.74 +/- 0.60 +/- 0.32) x 10(-6), where the uncertainties are statistical and systematic, respectively. We also report the first measurements of time-dependent CP-violation parameters: S-phi K0s gamma = +0.74(-1.05)(+0.72)(stat)(-0.024)(+0.10)(syst) and A phi(0)(Ks)gamma = +0.35 +/- 0.58(stat)(-0.10)(+0.23)(syst). Furthermore, we measure B(B+ -&gt; phi K+gamma) = (2.48 +/- 0.30 +/- 0.24) x 10(-6), A(CP) = -0.03 +/- 0.11 +/- 0.08, and find that the signal is concentrated in the M-phi K mass region near threshold.

    DOI: 10.1103/PhysRevD.84.071101

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  • Observation of B- -&gt; (p)over-bar Lambda D-0 at Belle 査読

    P. Chen, M. -Z. Wang, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, K. Belous, B. Bhuyan, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, Y. Chao, A. Chen, B. G. Cheon, I. -S. Cho, K. Cho, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, S. Eidelman, J. E. Fast, M. Feindt, V. Gaur, Y. M. Goh, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. Kichimi, C. Kiesling, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, S. Koblitz, P. Krizan, T. Kuhr, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Y. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, H. Miyata, Y. Miyazaki, G. B. Mohanty, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Neubauer, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Peters, M. Petric, L. E. Piilonen, M. Ritter, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, J. B. Singh, P. Smerkol, Y. -S. Sohn, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, M. Uchida, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, C. H. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, Z. P. Zhang

    PHYSICAL REVIEW D   84 ( 7 )   071501-1 - 071501-7   2011年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We study B- meson decays to (p) over bar Lambda D-(*)0 final states using a sample of 657 x 10(6) B (B) over bar events collected at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The observed branching fraction for B- -&gt; (p) over bar Lambda D-0 is (1.43(-0.25)(+0.28) +/-0.18) x 10(-5) with a significance of 8.1 standard deviations, where the uncertainties are statistical and systematic, respectively. Most of the signal events have the (p) over bar Lambda mass peaking near threshold. No significant signal is observed for B- -&gt; (p) over bar Lambda D-0 and the corresponding upper limit on the branching fraction is 4.8 x 10(-5) at the 90% confidence level.

    DOI: 10.1103/PhysRevD.84.071501

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  • Search for charmonium and charmoniumlike states in γ(2S) radiative decays 査読

    Wang X.L, Shen C.P, Yuan C.Z, Wang P, Adachi I, Aihara H, Asner D.M, Aushev T, Bakich A.M, Barberio E, Belous K, Bhuyan B, Bozek A, Bracko M, Browder T.E, Chang M.-C, Chen A, Cheon B.G, Chilikin K, Cho I.-S, Cho K, Choi Y, Dalseno J, Danilov M, Dolezal Z, Eidelman S, Fast J.E, Feindt M, Gaur V, Goh Y.M, Haba J, Hayasaka K, Hayashii H, Hoshi Y, Hsiung Y.B, Hyun H.J, Iijima T, Ishikawa A, Itoh R, Iwabuchi M, Iwasaki Y, Iwashita T, Julius T, Kang J.H, Katayama N, Kawasaki T, Kichimi H, Kim H.J, Kim H.O, Kim J.B, Kim J.H, Kim K.T, Kim M.J, Kim Y.J, Kinoshita K, Ko B.R, Kobayashi N, Koblitz S, Krizan P, Kuzmin A, Kwon Y.-J, Lange J.S, Lee S.-H, Li J, Li X.R, Li Y, Libby J, Lim C.-L, Liu C, Liventsev D, Louvot R, Matvienko D, McOnie S, Miyabayashi K, Miyata H, Miyazaki Y, Mohanty G.B, Mussa R, Nagasaka Y, Nakao M, Nakazawa H, Natkaniec Z, Neubauer S, Nishida S, Nishimura K, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Onuki Y, Pakhlov P, Pakhlova G, Park H, Park H.K, Pedlar T.K, Pestotnik R, Petric M, Piilonen L.E, Ritter M, Ryu S, Sahoo H, Sakai Y, Sanuki T, Schneider O, Schwanda C, Senyo K, Seon O, Sevior M.E, Shapkin M, Shibata T.-A, Shiu J.-G, Shwartz B, Simon F, Smerkol P, Sohn Y.-S, Solovieva E, Stanic S, Stari? M, Sumihama M, Tatishvili G, Teramoto Y, Trabelsi K, Uchida M, Uehara S, Unno Y, Uno S, Usov Y, Varner G, Wang C.H, Wang M.-Z, Watanabe Y, Won E, Yabsley B.D, Yamashita Y, Yamauchi M, Zhang Z.P, Zhilich V

    Physical Review D - Particles, Fields, Gravitation and Cosmology   84 ( 7 )   2011年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.84.071107

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Bounds on the width, mass difference and other properties of X(3872) → π+ π-J/ψ decays 査読

    S. K. Choi, S. L. Olsen, K. Trabelsi, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, M. Bračko, J. Brodzicka, O. Brovchenko, T. E. Browder, P. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. S. Cho, K. Cho, Y. Choi, J. Dalseno, J. Dalseno, Z. Doležal, Z. Drásal, A. Drutskoy, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, B. Golob, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, N. J. Joshi, T. Julius, J. H. Kang, N. Katayama, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, N. Kobayashi, S. Koblitz, P. Kodyš, S. Korpar, S. Korpar, P. Križan, P. Križan, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, M. J. Lee, S. H. Lee, J. Li, X. Li, Y. Li, J. Libby, C. L. Lim, C. Liu, Y. Liu, D. Liventsev, R. Louvot

    Physical Review D - Particles, Fields, Gravitation and Cosmology   84 ( 5 )   2011年9月

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    © 2011 American Physical Society. We present results from a study of X(3872) → ππJ/ψ decays produced via exclusive B → KX(3872) decays. We determine the mass to be MX(3872) = (3871.85 ± 0.27(stat) ± 0.19(syst)) MeV, a 90% confidence level upper limit on the natural width of ΓX(3872) &lt; 1.2 MeV, the product branching fraction B(B+ → K+X(3872)) X B(X(3872) → π+π-J/ψ) = (8.63±0.82(stat)±0.52(syst)) × 10-6, and a ratio of branching fractions B(B0 → K0X(3872))/B(B+ → K+X(3872)) = 0.50±0.14(stat) ±0.04(syst). The difference in mass between the X(3872) → π+π- J/ψ signals in B+ and B0 decays is ΔMX(3872) = (-0.71 ± 0.96(stat) ± 0.19(syst)) MeV. A search for a charged partner of the X(3872) in the decays B¯0 → K-X+ or B+ → K0X+, X+ → π+ π0J/ψ resulted in upper limits on the product branching fractions for these processes that are well below expectations for the case that the X(3872) is the neutral member of an isospin triplet. In addition, we examine possible JPC quantum number assignments for the X(3872) based on comparisons of angular correlations between final state particles in X(3872) → π+ π-J/ψ decays with simulated data for JPC values

    DOI: 10.1103/PhysRevD.84.052004

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  • Bounds on the width, mass difference and other properties of X(3872) -&gt; pi(+)pi(-) J/psi decays 査読

    S. -K. Choi, S. L. Olsen, K. Trabelsi, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, O. Brovchenko, T. E. Browder, P. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, I. -S. Cho, K. Cho, Y. Choi, J. Dalseno, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, N. J. Joshi, T. Julius, J. H. Kang, N. Katayama, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, S. Koblitz, P. Kodys, S. Korpar, P. Krizan, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, M. J. Lee, S. -H. Lee, J. Li, X. Li, Y. Li, J. Libby, C. -L. Lim, C. Liu, Y. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, R. Mussa, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, K. S. Park, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, F. Simon, J. B. Singh, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, S. E. Vahsen, G. Varner, K. E. Varvell, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, C. C. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   84 ( 5 )   052004-1 - 052004-16   2011年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present results from a study of X(3872) -&gt; pi pi J/psi decays produced via exclusive B -&gt; KX(3872) decays. We determine the mass to be M-X(3872) = (3871.85 +/- 0.27(stat) +/- 0.19(syst)) MeV, a 90% confidence level upper limit on the natural width of Gamma(X(3872)) &lt; 1.2 MeV, the product branching fraction B(B+ -&gt; K+X(3872)) X B(X(3872) -&gt; pi(+)pi(-) J/psi) = (8.63 +/- 0.82(stat) +/- 0.52(syst)) X 10(-6), and a ratio of branching fractions B(B-0 -&gt; (KX)-X-0(3872))/B(B+ -&gt; K+X(3872)) = 0.50 +/- 0.14(stat)) +/- 0.04(syst). The difference in mass between the X(3872) -&gt; pi(+)pi(-) J/psi signals in B+ and B-0 decays is Delta M-X(3872) = (-0.71 +/- 0.96(stat) +/- 0.19(syst)) MeV. A search for a charged partner of the X(3872) in the decays &lt;(B)over bar&gt;(0) -&gt; K-X+ or B+ -&gt; (KX+)-X-0, X+ -&gt; pi(+)pi(0) J/psi resulted in upper limits on the product branching fractions for these processes that are well below expectations for the case that the X(3872) is the neutral member of an isospin triplet. In addition, we examine possible J(PC) quantum number assignments for the X(3872) based on comparisons of angular correlations between final state particles in X(3872) -&gt; pi(+)pi(-) J/psi decays with simulated data for J(PC) values of 1(++) and 2(-+). We examine the influence of rho-omega interference in the M(pi(+)pi(-)) spectrum. The analysis is based on a 711 fb(-1) data sample that contains 772 x 10(6) B (B) over bar meson pairs collected at the gamma(4S) resonance in the Belle detector at the KEKB e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.84.052004

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  • Status Report from Tau subgroup of the HFAG 査読

    Swagato Banerjee, Kiyoshi Hayasaka, Hisaki Hayashii, Alberto Lusiani, J. Michael Roney, Boris Shwartz

    Nuclear Physics B - Proceedings Supplements   218 ( 1 )   329 - 334   2011年9月

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    掲載種別:研究論文(学術雑誌)  

    The aim of Tau subgroup of the HFAG is to provide average values of the mass and branching fractions of the tau lepton. Using the branching fractions, we present tests of charged current lepton universality and obtain estimates for |Vus|. We also summarize the status of searches for lepton flavor violating decays of the tau lepton. © 2011 Elsevier B.V.

    DOI: 10.1016/j.nuclphysbps.2011.06.053

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  • Search for CP violation in τ<sup>±</sup>→KS0π <sup>±</sup>ν<inf>τ</inf> decays at Belle 査読

    Bischofberger M, Hayashii H, Adamczyk K, Aihara H, Aulchenko V, Bakich A.M, Balagura V, Barberio E, Belous K, Bozek A, Bra?ko M, Browder T.E, Chen P, Cheon B.G, Chiang C.-C, Cho I.-S, Cho K, Choi Y, Danilov M, Dole?al Z, Drutskoy A, Eidelman S, Epifanov D, Golob B, Ha H, Haba J, Hayasaka K, Horii Y, Hoshi Y, Hou W.-S, Hsiung Y.B, Hyun H.J, Inami K, Ishikawa A, Itoh R, Iwabuchi M, Iwasaki Y, Julius T, Kang J.H, Kawai H, Kawasaki T, Kiesling C, Kim H.O, Kim M.J, Kim Y.J, Kinoshita K, Ko B.R, Kody? P, Kri?an P, Kwon Y.-J, Kyeong S.-H, Lange J.S, Lee M.J, Lee S.-H, Li J, Li Y, Liu C, Louvot R, MacNaughton J, McOnie S, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Mohanty G.B, Moll A, Mori T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Nishida S, Nishimura K, Nitoh O, Ohshima T, Okuno S, Pakhlova G, Park H, Park H.K, Petri? M, Piilonen L.E, R{\"o}hrken M, Ryu S, Sahoo H, Sakai Y, Schneider O, Schwanda C, Senyo K, Shapkin M, Shiu J.-G, Shwartz B, Simon F, Smerkol P, Sohn Y.-S, Stani? S, Stari? M, Sumiyoshi T, Teramoto Y, Trabelsi K, Uehara S, Uglov T, Uno S, Varner G, Vinokurova A, Vossen A, Wang C.H, Wang P, Watanabe M, Watanabe Y, Won E, Yamamoto H, Yamashita Y, Yuan C.Z, Zhou P, Zhulanov V, Zivko T

    Physical Review Letters   107 ( 13 )   2011年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.107.131801

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Observation of Transverse Polarization Asymmetries of Charged Pion Pairs in e(+)e(-) Annihilation near root s=10.58 GeV 査読

    A. Vossen, R. Seidl, I. Adachi, H. Aihara, T. Aushev, V. Balagura, W. Bartel, M. Bischofberger, A. Bondar, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, P. Chen, B. G. Cheon, K. Cho, Y. Choi, S. Eidelman, M. Feindt, V. Gaur, N. Gabyshev, A. Garmash, B. Golob, M. Grosse Perdekamp, J. Haba, K. Hayasaka, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, M. Iwabuchi, Y. Iwasaki, T. Iwashita, N. J. Joshi, H. Kichimi, H. O. Kim, M. J. Kim, B. R. Ko, T. Kumita, J. S. Lange, M. J. Lee, S. -H. Lee, M. Leitgab, Y. Li, C. Liu, D. Liventsev, R. Louvot, S. McOnie, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, E. Nakano, S. Nishida, O. Nitoh, A. Ogawa, T. Ohshima, S. Okuno, G. Pakhlova, H. Park, H. K. Park, M. Petric, L. E. Piilonen, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, O. Seon, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, P. Smerkol, Y. -S. Sohn, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamashita, V. Zhilich, P. Zhou, V. Zhulanov

    PHYSICAL REVIEW LETTERS   107 ( 7 )   072004-1 - 072004-7   2011年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The interference fragmentation function translates the fragmentation of a quark with a transverse projection of the spin into an azimuthal asymmetry of two final-state hadrons. In e(+)e(-) annihilation the product of two interference fragmentation functions is measured. We report nonzero asymmetries for pairs of charge-ordered pi(+)pi(-) pairs, which indicate a significant interference fragmentation function in this channel. The results are obtained from a 672 fb(-1) data sample that contains 711 x 10(6) pi(+)pi(-) pairs and was collected at and near the Y(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevLett.107.072004

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  • Observation of X(3872) -&gt; J/psi gamma and Search for X(3872) -&gt; psi 'gamma in B Decays 査読

    V. Bhardwaj, K. Trabelsi, J. B. Singh, S. -K. Choi, S. L. Olsen, I. Adachi, K. Adamczyk, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, E. Barberio, K. Belous, B. Bhuyan, M. Bischofberger, A. Bondar, M. Bracko, J. Brodzicka, T. E. Browder, A. Chen, P. Chen, B. G. Cheon, K. Cho, Y. Choi, J. Dalseno, Z. Dolezal, S. Eidelman, D. Epifanov, V. Gaur, N. Gabyshev, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, M. Iwabuchi, Y. Iwasaki, T. Iwashita, N. J. Joshi, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, S. Korpar, P. Krizan, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, M. J. Lee, S. -H. Lee, Y. Li, J. Libby, C. -L. Lim, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, C. Ng, S. Nishida, O. Nitoh, T. Nozaki, T. Ohshima, S. Okuno, Y. Onuki, G. Pakhlova, C. W. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, H. Sahoo, K. Sakai, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, O. Seon, M. Shapkin, V. Shebalin, T. -A. Shibata, J. -G. Shiu, B. Shwartz, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, A. Vossen, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, P. Zhou, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   107 ( 9 )   091803-1 - 091803-6   2011年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a study of B -&gt; (J/psi gamma)K and B -&gt; (psi'gamma)K decay modes using 772 X 10(6) B (B) over bar events collected at the Y(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We observe X(3872) -&gt; J/psi gamma and report the first evidence for chi(c2) -&gt; J/psi gamma in B -&gt; (X-c (c) over bar gamma)K decays, while in a search for X(3872) -&gt; psi'gamma no significant signal is found. We measure the branching fractions, B(B-+/- -&gt; X(3872)K-+/-)B(X(3872) -&gt; J/psi gamma) = (1.78(-0.44)(+0.48) +/- 0.12) X 10(-6), B(B-+/- -&gt; chi K-c2(+/-)) = (1.11(-0.34)(+0.36) +/- 0.09) X 10(-5), B(B+ -&gt; X(3872)K+)B(X(3872) -&gt; psi'gamma) &lt; 3.45 X 10(-6) (upper limit at 90% C. L.), and also provide upper limits for other searches.

    DOI: 10.1103/PhysRevLett.107.091803

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  • Evidence for the Suppressed Decay B- -&gt; DK-, D -&gt; K+pi- 査読

    Y. Horii, K. Trabelsi, H. Yamamoto, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, V. Balagura, E. Barberio, K. Belous, B. Bhuyan, M. Bischofberger, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, K. Cho, Y. Choi, Z. Dolezal, S. Eidelman, M. Feindt, V. Gaur, N. Gabyshev, A. Garmash, B. Golob, H. Ha, J. Haba, K. Hayasaka, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, N. J. Joshi, T. Julius, J. H. Kang, T. Kawasaki, H. Kichimi, C. Kiesling, H. J. Kim, H. O. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, S. Korpar, P. Krizan, T. Kuhr, R. Kumar, Y. -J. Kwon, M. J. Lee, S. -H. Lee, J. Li, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, E. Nakano, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, Y. Onuki, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, M. Prim, K. Prothmann, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, F. Simon, P. Smerkol, Y. -S. Sohn, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, S. Suzuki, S. Tanaka, Y. Teramoto, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, A. Vinokurova, A. Vossen, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, D. Zander, Z. P. Zhang, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   106 ( 23 )   231803-1 - 231803-6   2011年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The suppressed decay chain B- -&gt; DK-, D -&gt; K+pi(-), where D indicates a (D) over bar (0) or D-0 state, provides important information on the CP-violating angle phi(3). We measure the ratio R-DK of the decay rates to the favored mode B- -&gt; DK-, D -&gt; K+pi(-) to be R-DK = [1.63(-0.41)(+0.44)(stat)(-0.13)(+0.07)(syst)] x 10(-2), which indicates the first evidence of the signal with a significance of 4.1 sigma. We also measure the asymmetry A(DK) between the charge-conjugate decays to be A(DK) = -0.39(-0.28)(+0.26)(stat)(-0.03)(+0.04)(syst). The results are based on the full 772 x 10(6) B (B) over bar pair data sample collected at the Gamma(4S) resonance with the Belle detector.

    DOI: 10.1103/PhysRevLett.106.231803

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  • Search for lepton-flavor-violating tau decays into a lepton and a vector meson 査読

    Y. Miyazaki, H. Aihara, K. Arinstein, V. Aulchenko, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, A. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, K. Cho, K. -S. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, B. Golob, H. Ha, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, N. J. Joshi, T. Julius, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Krizan, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, Y. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. -G. Shiu, B. Shwartz, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, S. E. Vahsen, G. Varner, A. Vinokurova, A. Vossen, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   699 ( 4 )   251 - 257   2011年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We search for lepton-flavor-violating tau -&gt; lV(0) decays, where l is an electron or muon and V(0) is one of the vector mesons rho(0), phi, omega, K*(0) and (K) over bar*(0). We use 854 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No evidence for a signal is found in any decay mode, and we obtain 90% confidence level upper limits on the individual branching fractions in the range (1.2-8.4) x 10(-8). (C) 2011 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2011.04.011

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  • Measurement of the decay B-0 -&gt; pi(-) l(+) nu and determination of vertical bar V-ub vertical bar 査読

    H. Ha, E. Won, I. Adachi, H. Aihara, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, K. Cho, K. -S. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, N. J. Joshi, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, Y. Li, A. Limosani, C. Liu, Y. Liu, D. Liventsev, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petri, L. E. Piilonen, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, S. E. Vahsen, G. Varner, K. E. Varvell, A. Vossen, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, Y. Yamashita, Z. P. Zhang, P. Zhou, V. Zhulanov, T. Zivko, A. Zupanc

    PHYSICAL REVIEW D   83 ( 7 )   071101-1 - 071101-6   2011年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the charmless semileptonic decay B-0 -&gt; pi(-) l(+) nu using a data sample containing 657 x 10(6) B (B) over bar events collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider operating near the Y(4S) resonance. We determine the total branching fraction of the decay, B(B-0 -&gt; pi(-) l(+) nu) = (1.49 +/- 0.04(stat) +/- 0.07(syst)) x 10(-)4. We also report a new precise measurement of the differential decay rate and extract the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-ub vertical bar using model-independent and model-dependent approaches. From a simultaneous fit to the measured differential decay rate and lattice QCD results, we obtain vertical bar V-ub vertical bar (3.43 +/- 0: 33) x 10(-3), where the error includes both experimental and theoretical uncertainties.

    DOI: 10.1103/PhysRevD.83.071101

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  • Erratum: Study of the decays B→D<inf>s1</inf>(2536)<sup>+</sup>D <sup>̄</sup>(<sup>*</sup>) (Physical Review D - Particles, Fields, Gravitation and Cosmology (2011) 83:5 (059902)) 査読

    Aushev T, Adachi I, Arinstein K, Aulchenko V, Bakich A.M, Balagura V, Bhardwaj V, Bischofberger M, Bondar A, Bozek A, Bra?ko M, Browder T.E, Chang M.-C, Chen A, Chen P, Cheon B.G, Chistov R, Cho I.-S, Cho K, Choi K.-S, Choi Y, Dalseno J, Danilov M, Drutskoy A, Eidelman S, Epifanov D, Gaur V, Gabyshev N, Garmash A, Golob B, Ha H, Hayasaka K, Hayashii H, Horii Y, Hoshi Y, Hou W.-S, Hyun H.J, Iijima T, Inami K, Ishikawa A, Itoh R, Iwabuchi M, Iwasaki Y, Iwashita T, Julius T, Kang J.H, Kawasaki T, Kim H.J, Kim H.O, Kim J.H, Kim M.J, Kim Y.J, Kinoshita K, Ko B.R, Kody P, Krian P, Kuhr T, Kumita T, Kuzmin A, Kwon Y.-J, Kyeong S.-H, Lange J.S, Lee S.-H, Li J, Liu C, Liu Y, Liventsev D, Louvot R, Matyja A, McOnie S, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Mohanty G.B, Nakao M, Nakazawa H, Natkaniec Z, Neubauer S, Nishida S, Nitoh O, Ogawa S, Ohshima T, Olsen S.L, Ostrowicz W, Pakhlov P, Pakhlova G, Park H.K, Pestotnik R, Petri? M, Piilonen L.E, Poluektov A, Prothmann K, R{\"o}hrken M, Ryu S, Sahoo H, Sakai K, Sakai Y, Schneider O, Schwanda C, Senyo K, Seon O, Sevior M.E, Shapkin M, Shebalin V, Shen C.P, Shiu J.-G, Shwartz B, Simon F, Singh J.B, Smerkol P, Sohn Y.-S, Sokolov A, Solovieva E, Stani? S, Stari? M, Sumihama M, Sumiyoshi T, Tanaka S, Teramoto Y, Tikhomirov I, Trabelsi K, Uchida M, Uglov T, Uno S, Usov Y, Vahsen S.E, Varner G, Vervink K, Vinokurova A, Vossen A, Wang C.H, Wang M.-Z, Wang P, Watanabe Y, Williams K.M, Yabsley B.D, Yamashita Y, Yusa Y, Zhang Z.P, Zhilich V, Zhou P, Zhulanov V, Zupanc A, Zyukova O

    Physical Review D - Particles, Fields, Gravitation and Cosmology   83 ( 5 )   2011年3月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.83.059902

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  • Study of the decays B→Ds1(2536)+D ̄(*) 査読

    T. Aushev, I. Adachi, K. Arinstein, K. Arinstein, V. Aulchenko, V. Aulchenko, A. M. Bakich, V. Balagura, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bondar, A. Bozek, M. Bračko, M. Bračko, T. E. Browder, M. C. Chang, A. Chen, P. Chen, B. G. Cheon, R. Chistov, I. S. Cho, K. Cho, K. S. Choi, Y. Choi, J. Dalseno, J. Dalseno, M. Danilov, A. Drutskoy, S. Eidelman, S. Eidelman, D. Epifanov, D. Epifanov, V. Gaur, N. Gabyshev, N. Gabyshev, A. Garmash, A. Garmash, B. Golob, B. Golob, H. Ha, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, P. Križan, P. Križan, T. Kuhr, T. Kumita, A. Kuzmin, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, S. H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. L. Olsen, S. L. Olsen, W. Ostrowicz, P. Pakhlov, G. Pakhlova

    Physical Review D - Particles, Fields, Gravitation and Cosmology   83 ( 5 )   2011年3月

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    掲載種別:研究論文(学術雑誌)  

    We report a study of the decays B→Ds1(2536) +D̄(*), where D ̄(*) is D̄0, D- or D*-, using a sample of 657×106BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The branching fractions of the decays B+→Ds1(2536)+D ̄0, B0→Ds1(2536)+D- and B0→Ds1(2536)+D*- multiplied by that of Ds1(2536)+→(D *0K++D*+K0) are found to be (3.97±0.85±0.56)×10-4, (2.75±0. 62±0.36)×10-4 and (5.01±1.21±0.70) ×10-4, respectively. The ratio B(Ds1→D *0K+)/B(Ds1→D* +K0) is measured to be 0.88±0.24±0.08. © 2011 American Physical Society.

    DOI: 10.1103/PhysRevD.83.051102

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  • Study of the decays B -&gt; Ds1(2536)(+) (D)over-bar(()*()) 査読

    T. Aushev, I. Adachi, K. Arinstein, V. Aulchenko, A. M. Bakich, V. Balagura, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M-C Chang, A. Chen, P. Chen, B. G. Cheon, R. Chistov, I-S Cho, K. Cho, K-S Choi, Y. Choi, J. Dalseno, M. Danilov, A. Drutskoy, S. Eidelman, D. Epifanov, V. Gaur, N. Gabyshev, A. Garmash, B. Golob, H. Ha, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W-S Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, P. Krizan, T. Kuhr, T. Kumita, A. Kuzmin, Y-J Kwon, S-H Kyeong, J. S. Lange, S-H Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. L. Olsen, W. Ostrowicz, P. Pakhlov, G. Pakhlova, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, K. Prothmann, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J-G Shiu, B. Shwartz, F. Simon, J. B. Singh, P. Smerkol, Y-S Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, M. Sumihama, T. Sumiyoshi, S. Tanaka, Y. Teramoto, I. Tikhomirov, K. Trabelsi, M. Uchida, T. Uglov, S. Uno, Y. Usov, S. E. Vahsen, G. Varner, K. Vervink, A. Vinokurova, A. Vossen, C. H. Wang, M-Z Wang, P. Wang, Y. Watanabe, K. M. Williams, B. D. Yabsley, Y. Yamashita, Y. Yusa, Z. P. Zhang, V. Zhilich, P. Zhou, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   83 ( 5 )   051102-1 - 051102-6   2011年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a study of the decays B -&gt; D-s1(2536)+ (D) over bar (()*()), where (D) over bar (()*()) is (D) over bar (0), D- or D*(-), using a sample of 657 x 10(6)B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The branching fractions of the decays B+ -&gt; D-s1(2536)(+) (D) over bar (0), B-0 -&gt; D-s1(2536)D-+(-) and B-0 -&gt; D-s1(2536)D+*(-) multiplied by that of D-s1(2536)(+) -&gt; (D*K-0(+) + D*K-+(0)) are found to be (3.97 +/- 0.85 +/- 0.56) x 10(-4), (2.75 +/- 0.62 +/- 0.36) x 10(-4) and (5.01 +/- 1.21 +/- 0.70) x 10(-4), respectively. The ratio B(D-s1 -&gt; D*K-0(+))/B(D-s1 -&gt; D*K-+(0)) is measured to be 0.88 +/- 0.24 +/- 0.08.

    DOI: 10.1103/PhysRevD.83.051102

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  • Measurement of e(+)e(-) -&gt; Ds(*)+Ds(*)- cross sections near threshold using initial-state radiation 査読

    G. Pakhlova, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, B. Bhuyan, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, A. Chen, P. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, K. Cho, K. -S. Choi, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, N. J. Joshi, T. Julius, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, H. Palka, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. -G. Shiu, B. Shwartz, F. Simon, P. Smerkol, Y. -S. Sohn, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, K. E. Varvell, A. Vinokurova, A. Vossen, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, R. Wedd, E. Won, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhilich, P. Zhou, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   83 ( 1 )   011101-1 - 011101-7   2011年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of exclusive e(+)e(-) -&gt; Ds(*)+Ds(*)- cross sections as a function of center-of-mass energy near the Ds(*)+Ds(*)- threshold with initial-state radiation. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 967 fb(-1).

    DOI: 10.1103/PhysRevD.83.011101

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  • Tau lepton physics at Belle 査読

    Kiyoshi Hayasaka

    Journal of Physics: Conference Series   335 ( 1 )   2011年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:Institute of Physics Publishing  

    We report the recent results of a search for lepton-flavor-violating τ decays and a search for CP violation in τ → νK0 Sπ using a large data sample accumulated with the Belle detector at the KEKB asymmetric-energy e+e- collider. The sensitivity to these modes is significantly improved compared to previous experiments.

    DOI: 10.1088/1742-6596/335/1/012029

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  • Measurement of eta eta production in two-photon collisions 査読

    S. Uehara, Y. Watanabe, H. Nakazawa, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, M. Bischofberger, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, P. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, J. Dalseno, Z. Dolezal, A. Drutskoy, S. Eidelman, P. Goldenzweig, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, T. Mori, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, F. Simon, P. Smerkol, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, Y. Teramoto, T. Uglov, Y. Unno, S. Uno, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, R. Wedd, E. Won, Y. Yamashita, Z. P. Zhang, V. Zhilich, P. Zhou, T. Zivko, A. Zupanc

    PHYSICAL REVIEW D   82 ( 11 )   114031-1 - 114031-21   2010年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first measurement of the differential cross section for the process gamma gamma -&gt; eta eta in the kinematic range above the eta eta threshold, 1.096 GeV &lt; W &lt; 3.8 GeV over nearly the entire solid angle range, vertical bar cos theta*vertical bar &lt;= 0.9 or &lt;= 1.0 depending on W, where W and theta* are the energy and eta scattering angle, respectively, in the gamma gamma center-of-mass system. The results are based on a 393 fb(-1) data sample collected with the Belle detector at the KEKB e(+)e(-) collider. In the W range 1.1-2.0 GeV/c(2) we perform an analysis of resonance amplitudes for various partial waves, and at higher energy we compare the energy and the angular dependences of the cross section with predictions of theoretical models and extract contributions of the chi(cJ) charmonia.

    DOI: 10.1103/PhysRevD.82.114031

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  • First Measurement of Inclusive B -&gt; X-s eta Decays 査読

    K. Nishimura, T. E. Browder, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, M. -C. Chang, Y. Chao, A. Chen, K. -F. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, A. Drutskoy, S. Eidelman, N. Gabyshev, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, N. J. Joshi, T. Julius, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, H. J. Kim, H. O. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, S. Ogawa, T. Ohshima, S. L. Olsen, W. Ostrowicz, G. Pakhlova, C. W. Park, H. Park, H. K. Park, K. S. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, F. Simon, P. Smerkol, A. Sokolov, E. Solovieva, M. Staric, T. Sumiyoshi, S. Suzuki, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, J. Wicht, K. M. Williams, E. Won, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, P. Zhou, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   105 ( 19 )   191803-1 - 191803-6   2010年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a first measurement of inclusive B -&gt; X-s eta decays, where X-s is a charmless state with unit strangeness. The measurement is based on a pseudoinclusive reconstruction technique and uses a sample of 657 x 10(6)B (B) over bar pairs accumulated with the Belle detector at the KEKB e(+)e(-) collider. For M-X1 &lt; 2.6 GeV/c(2), we measure a branching fraction of [26.1 +/- 3.0(stat)(-2.1)(+1.9)(syst)(-7.1)(+4.0)(model)] x 10(-5) and a direct CP asymmetry of A(CP) = 0.13 +/- 0.04(-0.03)(+0.02). Over half of the signal occurs in the range M-X2 &gt; 1.8 GeV/c(2).

    DOI: 10.1103/PhysRevLett.105.191803

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  • Search for CP-violating charge asymmetry in B-+/- -&gt; J/psi K-+/- decays 査読

    K. Sakai, T. Kawasaki, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M-C Chang, Y. Chao, A. Chen, K-F Chen, P. Chen, B. G. Cheon, C-C Chiang, K. Cho, Y. Choi, J. Dalseno, Z. Dolezal, Z. Drasal, W. Dungel, S. Eidelman, M. Feindt, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W-S Hou, H. J. Hyun, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, J. H. Kang, H. Kawai, H. Kichimi, C. Kiesling, H. J. Kim, J. H. Kim, Y. J. Kim, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y-J Kwon, S-H Kyeong, J. S. Lange, M. J. Lee, J. Li, A. Limosani, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, D. Mohapatra, E. Nakano, M. Nakao, Z. Natkaniec, S. Neubauer, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Prim, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, J-G Shiu, B. Shwartz, F. Simon, P. Smerkol, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, K. Trabelsi, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M-Z Wang, P. Wang, M. Watanabe, Y. Watanabe, R. Wedd, E. Won, Y. Yamashita, C. C. Zhang, Z. P. Zhang, P. Zhou, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   82 ( 9 )   091104-1 - 091104-7   2010年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present the result of a search for charge asymmetry in B-+/- -&gt; J/psi K-+/- decays using 772 X 10(6) B (B) over bar pairs collected at the Y(4S) resonance by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The CP-violating charge asymmetry is measured to be A(CP)(B+ -&gt; J/psi K+) = [-0.76 +/- 0.50 (stat) +/- 0.22 (syst)]%.

    DOI: 10.1103/PhysRevD.82.091104

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  • Observation of an enhancement in e(+)e(-) -&gt; gamma(1S)pi(+)pi(-), gamma(2S)pi(+)pi(-), and gamma(3S)pi(+)pi(-) production near root s=1.89 GeV 査読

    K. -F. Chen, W. -S. Hou, I. Adachi, H. Aihara, T. Aushev, A. M. Bakich, V. Balagura, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, P. Chang, Y. Chao, A. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, P. Goldenzweig, H. Ha, B. -Y. Han, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, N. Katayama, C. Kiesling, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, S. -H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, J. MacNaughton, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, G. Pakhlova, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, P. Smerkol, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, S. Suzuki, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   82 ( 9 )   091106(R)   2010年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We measure the production cross sections for e(+)e(-) -&gt; gamma(1S)pi(+)pi(-), gamma(2S)pi(+)pi(-), and gamma(3S)pi(+)pi(-) as a function of root 5 between 10.83 GeVand 11.02 GeV. The data consist of 8.1 fb(-1) collected with the Belle detector at the KEKB e(+)e(-) collider. We observe enhanced production in all three final states that does not agree well with the conventional gamma(10860) line shape. A fit using a Breit-Wigner resonance shape yields a peak mass of [10 888.4(-2.6)(+2.7)(stat) +/- 1.2(syst)] MeV/c(2) and a width of [30.7(-7.0)(+8.3)(stat) +/- 3.1(syst) MeV/c(2).

    DOI: 10.1103/PhysRevD.82.091106

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  • Observation of an enhancement in ${e}^{+}{e}^{ { - } }{\rightarrow}{\Upsilon}(1S){ { \pi } }^{+}{ { \pi } }^{ { - } }$, ${\Upsilon}(2S){ { \pi } }^{+}{ { \pi } }^{ { - } }$, and ${\Upsilon}(3S){ { \pi } }^{+}{ { \pi } }^{ { - } }$ production near $\sqrt{s}=10.89\text{ }\text{ }{GeV}$ 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   82 ( 9 )   091106-1 - 091106-6   2010年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.82.091106

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  • Observation of B-s(0) -&gt; D-s(()*()) + D-s(()*()) Using e(+)e(-) Collisions and a Determination of the B-s-(B)over-bar(s) Width Difference Delta Gamma(s) 査読

    S. Esen, A. J. Schwartz, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M-C Chang, P. Chang, A. Chen, P. Chen, B. G. Cheon, C-C Chiang, Y. Choi, J. Dalseno, M. Dash, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, T. Higuchi, Y. Hoshi, W-S Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, N. J. Joshi, T. Julius, J. H. Kang, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, J. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, Y-J Kwon, S-H Kyeong, J. S. Lange, S-H Lee, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, H. Miyata, R. Mizuk, G. B. Mohanty, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, C. W. Park, H. Park, H. K. Park, M. Petric, L. E. Piilonen, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J-G Shiu, P. Smerkol, E. Solovieva, M. Staric, K. Sumisawa, T. Sumiyoshi, Y. Teramoto, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M-Z Wang, P. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   105 ( 20 )   201802-1 - 201802-6   2010年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We have made the first observation of B-s(0) -&gt; D-s(()*()+) D-s(()*()-) decays using 23.6 fb(-1) of data recorded by the Belle experiment running on the Y(5S) resonance. The branching fractions are measured to be B(B-s(0) -&gt; Ds+Ds-) = (1.03(-0.32-0.25)(+0.39+0.26))% B(B-s(0) -&gt; Ds*D-+/-(s)-/+) = (2.75(-0.71)(+0.83) +/- 0.69)%, and B(B-s(0) -&gt; D-s*(+) D-s*(-)) = (3.08(-1.04-0.86)(+1.22+0.85))%; the sum is B[B-s(0) -&gt; D-s(()*()+) D-s(()*()-)] = (6.85(-1.30-1.80)(+1.53+1.79))%. Assuming B-s(0) -&gt; D-s(()*()+) D-s(()*()-) saturates decays to CP-even final states, the branching fraction determines the ratio Delta Gamma(s)/cos phi, where Delta Gamma(s) is the difference in widths between the two B-s-(B) over bar (s) mass eigenstates, and phi is a CP-violating weak phase. Taking CP violation to be negligibly small, we obtain Delta Gamma(s)/Delta Gamma(s) = 0.147(-0.030)(+0.036)(stat)(-0.041)(+0.042)(syst), where Gamma(s) is the mean decay width.

    DOI: 10.1103/PhysRevLett.105.201802

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  • Evidence for B- -&gt; tau(-)(nu)over-bar(tau) with a semileptonic tagging method 査読

    K. Hara, T. Iijima, H. Aihara, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, E. Barberio, K. Belous, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, B. G. Cheon, C-C. Chiang, I-S. Cho, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, K. Inami, M. Iwabuchi, Y. Iwasaki, T. Julius, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, M. Kreps, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y-J. Kwon, S-H. Kyeong, M. J. Lee, S-H. Lee, J. Li, A. Limosani, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, G. Pakhlova, C. W. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Prim, M. Rozanska, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J-G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, E. Solovieva, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M-Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, C. C. Zhang, V. Zhilich, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   82 ( 7 )   071101-1 - 071101-7   2010年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the decay B- -&gt; tau(-)(nu) over bar (tau) using a data sample containing 657 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. A sample of B+B- pairs are tagged by reconstructing one B+ meson decaying semileptonically. We detect the B- -&gt; tau(-)(nu) over bar (tau) candidate in the recoil. We obtain a signal with a significance of 3.6 standard deviations including systematic uncertainties, and measure the branching fraction to be B- -&gt; tau(-)(nu) over bar (tau) [1.54(-0.37)(+0.38) (stat) (+0.29)(-0.31) (syst) x 10(-4). This result confirms the evidence for B- -&gt; tau(-)(nu) over bar (tau) obtained in a previous Belle measurement that used a hadronic B tagging method.

    DOI: 10.1103/PhysRevD.82.071101

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  • Measurement of CP violating asymmetries in B-0 -&gt; (K+K-KS0) decays with a time-dependent Dalitz approach 査読

    Y. Nakahama, K. Sumisawa, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, J. Dalseno, A. Das, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, P. Goldenzweig, B. Golob, J. Haba, K. Hara, K. Hayasaka, M. Hazumi, T. Higuchi, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, T. Julius, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, M. J. Kim, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, S. -H. Kyeong, M. J. Lee, S. -H. Lee, Y. Liu, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, E. Nakano, M. Nakao, H. Nakazawa, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. L. Olsen, W. Ostrowicz, H. Ozaki, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Prim, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, P. Smerkol, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, Y. Yamashita, Y. Yusa, D. Zander, Z. P. Zhang, V. Zhilich, P. Zhou, T. Zivko, A. Zupanc

    PHYSICAL REVIEW D   82 ( 7 )   073011-1 - 073011-12   2010年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of CP violating asymmetries in B-0 ((B-0) over bar) -&gt; (K+K-KS0) decays with a time-dependent Dalitz approach. This analysis is based on a data sample of 657 x 10(6) B (B) over bar pairs accumulated at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. As the result of an unbinned maximum likelihood fit to the selected candidates, the mixing-induced and direct CP violation parameters phi(eff)(1) and A(CP) are obtained for B-0 -&gt; phi(1020)K-S(0), B-0 -&gt; f(0)(980)K-S(0), and other B-0 -&gt; (K+K-KS0) decays. We find four solutions that describe the data. There are phi(eff)(1) (B-0 -&gt; phi(1020)K-S(0)) = (32.2 +/- 9.0 +/- 2.6 +/- 1.4); phi(eff)(1)(B-0 -&gt; phi(1020)K-S(0)) = 26.2 +/- 8.8 +/- 2.7 +/- 1.2); phi(eff)(1)(B-0 phi(1020)K-S(0)) = (27.3 +/- 8.6 +/- 2.8 +/- 1.3); and phi(eff)(1)(B-0 -&gt; phi(1020)K-S(0)) = (24.3 +/- 8.0 +/- 2.9 +/- 5.2). The values for the CP violating phase in B-0 -&gt; phi(1020)K-S(0) are similar, but other properties of the Dalitz plot are quite different for the four solutions. These four solutions have consistent phi(eff)(1) values for all three B-meson decay channels and none of them deviates significantly from the values measured in B -&gt; (c (c) over bar )K-0 decays with the currently available statistics. In addition, we find no significant direct CP violation.

    DOI: 10.1103/PhysRevD.82.073011

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  • Measurements of branching fractions for B-0 -&gt; D-s(+) pi(-) and (B)over-bar(0) -&gt; D-s(+) K- 査読

    A. Das, T. Aziz, K. Trabelsi, B. Mohanty, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, K. -F. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, Z. Drasal, A. Drutskoy, W. Dungel, S. Eidelman, S. Esen, N. Gabyshev, H. Ha, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, N. J. Joshi, T. Julius, D. H. Kah, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, J. MacNaughton, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, T. Mori, E. Nakano, M. Nakao, S. Neubauer, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, G. Pakhlova, C. W. Park, H. Park, H. K. Park, K. S. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. -G. Shiu, B. Shwartz, F. Simon, J. B. Singh, R. Sinha, P. Smerkol, A. Sokolov, E. Solovieva, M. Staric, T. Sumiyoshi, S. Suzuki, Y. Teramoto, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, P. Zhou, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   82 ( 5 )   051103-1 - 051103-7   2010年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present improved measurements of the branching fractions for the decays B-0 -&gt; D-s(+) pi(-) and (B) over bar (0) -&gt; D-s(+) K- using a data sample of 657 X 10(6) B (B) over bar events collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric- energy e(+)e(-) collider. The results are B(B-0 -&gt; D-s(+) pi(-)) = (1.99 +/- 0.26 +/- 0.18) X 10(-5) and B((B) over bar (0) -&gt; D-s(+) K-) = (1.91 +/- 0.24 +/- 0.17) X 10(-5), where the uncertainties are statistical and systematic, respectively. Based on these results, we determine the ratio between amplitudes of the doubly Cabibbo suppressed decay B-0 -&gt; D+pi(-) and the Cabibbo favored decay B-0 -&gt; D-pi(+), R-D pi = [1.71 +/- 0.11(stat) +/- 0.09(syst) +/- 0.02(theo)]%, where the last term denotes the theory error.

    DOI: 10.1103/PhysRevD.82.051103

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  • Search for charmonium and charmoniumlike states in Y(1S) radiative decays 査読

    C. P. Shen, X. L. Wang, C. Z. Yuan, P. Wang, I. Adachi, H. Aihara, T. Aushev, A. M. Bakich, V. Balagura, K. Belous, V. Bhardwaj, M. Bischofberger, M. Bracko, T. E. Browder, M. -C. Chang, K. -F. Chen, P. Chen, B. G. Cheon, Y. Choi, J. Dalseno, M. Danilov, Z. Dolezal, S. Eidelman, N. Gabyshev, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Julius, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, H. J. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, P. Krizan, T. Kuhr, A. Kuzmin, J. S. Lange, M. J. Lee, S. -H. Lee, R. Leitner, J. Li, C. Liu, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, H. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, S. Ryu, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, L. Shang, M. Shapkin, J. -G. Shiu, B. Shwartz, P. Smerkol, E. Solovieva, S. Stanic, M. Staric, Y. Teramoto, T. Uglov, Y. Unno, S. Uno, G. Varner, K. Vervink, C. H. Wang, M. -Z. Wang, R. Wedd, E. Won, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, P. Zhou, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   82 ( 5 )   051504-1 - 051504-6   2010年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using a sample of 102 X 10(6) Y(1S) events collected with the Belle detector, we report on the first search for charge-parity-even charmonium and charmoniumlike states in Y(1S) radiative decays. No significant chi(cJ) or eta(c) signal is observed and 90% C. L. limits on B(Y(1S) -&gt; gamma chi(c0)) &lt; 6.5 X 10(-4), B(Y(1S) -&gt; gamma chi(c1)) &lt; 2.3 X 10(-5), B(Y(1S) -&gt; gamma chi(c2)) &lt; 7.6 X 10(-6), and B(Y(1S) -&gt; gamma eta(c)) &lt; 5.7 X 10(-5) are obtained. The product branching fraction limits B(Y(1S) -&gt; gamma X(3872))B(X(3872) -&gt; pi(+) pi(-) J/psi) &lt; 1.6 X 10(-6), B(Y(1S) -&gt; gamma X(3872))B(X(3872) -&gt; pi+ pi(-) pi(0) J/psi) &lt; 2.8 X 10(-6), B(Y(1S) -&gt; gamma X(3915)) B(X(3915) -&gt; omega J/psi) &lt; 3.0 X 10(-6), and B(Y(1S) -&gt; gamma Y(4140))B(Y(4140) -&gt; phi J/psi) &lt; 2.2 X 10(-6) are obtained at the 90% C.L. Furthermore, no evidence is found for excited charmonium states below 4.8 GeV/c(2).

    DOI: 10.1103/PhysRevD.82.051504

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  • Search for lepton flavor violating tau(-) decays into l(-)K(S)(0) l(-)K(S)(0)K(S)(0) 査読

    Y. Miyazaki, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, M. Bischofberger, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, K. -F. Chen, P. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, M. Danilov, M. Dash, Z. Dolezal, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. H. Kim, Y. J. Kim, B. R. Ko, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, M. J. Lee, S. -H. Lee, J. Li, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, H. Miyata, R. Mizuk, G. B. Mohanty, T. Mori, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, H. K. Park, M. Petric, L. E. Piilonen, A. Poluektov, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, S. Suzuki, M. Tanaka, Y. Teramoto, K. Trabelsi, T. Tsuboyama, S. Uehara, S. Uno, Y. Usov, G. Varner, K. Vervink, C. H. Wang, J. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, Z. P. Zhang, V. Zhilich, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   692 ( 1 )   4 - 9   2010年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We have searched for the lepton-flavor-violating decays tau(-) -&gt; l(-)K(S)(0)) and l(-)K(S)(0)K(S)(0) (l = e or mu), using a data sample of 671 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No evidence for a signal was found in any of the decay modes, and we set the following upper limits for the branching fractions: beta(tau(-) -&gt; e(-)K(S)(0)) &lt; 2.6 x 10(-8), beta(tau(-) -&gt; mu K--(S)0) &lt; 2.3 x 10(-8), beta(tau(-) -&gt; e(-)K(S)(0)K(S)(0)) &lt; 7.1 x 10(-8) and beta(tau(-) -&gt; mu(-KSKS0)-K-0) &lt; 8.0 x 10(-8) at the 90% confidence level. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2010.07.012

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  • Measurement of the branching fractions and the invariant mass distributions for τ<sup>-</sup>→h<sup>-</sup>h<sup>+</sup>h<sup>-</sup>ντ decays 査読

    Lee M.J, Aihara H, Arinstein K, Aulchenko V, Aushev T, Bakich A.M, Barberio E, Bay A, Belous K, Bhardwaj V, Bischofberger M, Bondar A, Bozek A, Bra?ko M, Browder T.E, Chang P, Chen A, Chen P, Cheon B.G, Cho I.-S, Choi Y, Dalseno J, Das A, Dungel W, Eidelman S, Epifanov D, Fujikawa M, Gabyshev N, Garmash A, Ha H, Haba J, Han B.-Y, Hasegawa Y, Hayasaka K, Hayashii H, Hoshi Y, Hou W.-S, Hsiung Y.B, Hyun H.J, Iijima T, Inami K, Itoh R, Iwasaki M, Iwasaki Y, Julius T, Kah D.H, Kang J.H, Katayama N, Kawasaki T, Kiesling C, Kim H.J, Kim H.O, Kim J.H, Kim S.K, Kim Y.I, Kim Y.J, Ko B.R, Korpar S, Kri?an P, Krokovny P, Kumita T, Kuzmin A, Kwon Y.-J, Kyeong S.-H, Lange J.S, Lee S.-H, Li J, Liu C, Liu Y, Liventsev D, Louvot R, MacNaughton J, Mandl F, McOnie S, Miyata H, Miyazaki Y, Mori T, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Pakhlov P, Pakhlova G, Palka H, Park C.W, Park H, Park H.K, Peak L.S, Pestotnik R, Petri? M, Piilonen L.E, Poluektov A, Ryu S, Sahoo H, Sakai K, Sakai Y, Schneider O, Schwartz A.J, Senyo K, Sevior M.E, Shapkin M, Shebalin V, Shen C.P, Shiu J.-G, Shwartz B, Singh J.B, Smerkol P, Sokolov A, Solovieva E, Stani? S, Stari? M, Sumiyoshi T, Taylor G.N, Teramoto Y, Tikhomirov I, Uehara S, Ueno K, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Varner G, Vervink K, Vinokurova A, Wang C.H, Wang P, Watanabe Y, Wedd R, Won E, Yabsley B.D, Yamashita Y, Yamauchi M, Yuan C.Z, Zhang C.C, Zhang Z.P, Zhilich V, Zhulanov V, Zivko T, Zupanc A, Zyukova O

    Physical Review D - Particles, Fields, Gravitation and Cosmology   81 ( 11 )   2010年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.81.113007

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Search for ${B}^{0}{\rightarrow}{K}^{*0}{\overline{K } }^{*0}$, ${B}^{0}{\rightarrow}{K}^{*0}{K}^{*0}$ and ${B}^{0}{\rightarrow}{K}^{+}{ { \pi } }^{ { - } }{K}^{ { \mp } }{ { \pi } }^{\pm}$ decays 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   81 ( 7 )   071101-1 - 071101-7   2010年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.81.071101

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  • Search for B-0 -&gt; K*(0)(K)over-bar*(0), B-0 -&gt; K*K-0*(0) and B-0 -&gt; K+ pi K--(-/+)pi(+/-) decays 査読

    C. -C. Chiang, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, P. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, J. Dalseno, A. Das, Z. Dolezal, A. Drutskoy, S. Eidelman, M. Feindt, N. Gabyshev, P. Goldenzweig, H. Ha, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, Y. B. Hsiung, T. Iijima, K. Inami, R. Itoh, M. Iwasaki, N. J. Joshi, J. H. Kang, P. Kapusta, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, K. Kinoshita, B. R. Ko, S. Korpar, M. Kreps, P. Krizan, P. Krokovny, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, J. Li, A. Limosani, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, E. Nakano, M. Nakao, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, S. Okuno, S. L. Olsen, W. Ostrowicz, G. Pakhlova, C. W. Park, H. Park, H. K. Park, K. S. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, J. -G. Shiu, R. Sinha, P. Smerkol, A. Sokolov, S. Stanic, M. Staric, J. Stypula, K. Sumisawa, M. Tanaka, Y. Teramoto, K. Trabelsi, Y. Unno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. -Z. Wang, M. Watanabe, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   81 ( 7 )   2010年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a search for the decays B-0 -&gt; K*(0)(K) over bar*(0) and B-0 -&gt; K*K-0*(0) . We also measure other charmless decay modes with K+ pi K--(-)pi(+) and K+pi K--(+)pi(-) final states. The results are obtained from a data sample containing 657 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric- energy e(+)e(-) collider. We set upper limits on the branching fractions for B-0 -&gt; K*(0)(K) over bar*(0) and B-0 -&gt; K*K-0*(0) of 0: 81 x 10(-6) and 0.20 x 10(-6), respectively, at the 90% confidence level.

    DOI: 10.1103/PhysRevD.81.071101

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  • Search for lepton-flavor-violating tau decays into three leptons with 719 million produced tau(+)tau(-) pairs 査読

    K. Hayasaka, K. Inami, Y. Miyazaki, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, J. Dalseno, A. Drutskoy, S. Eidelman, D. Epifanov, M. Feindt, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, B. -Y. Han, H. Hayashii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. H. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, P. Kvasnicka, Y. - J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, R. Mizuk, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, M. Roehrken, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, E. Solovieva, M. Staric, T. Sumiyoshi, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. Vervink, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   687 ( 2-3 )   139 - 143   2010年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We present a search for lepton-flavor-violating tau decays into three leptons (electrons or muons) using 782 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No evidence for these decays is observed and we set 90% confidence level upper limits on the branching fractions between 1.5 x 10(-8) and 2.7 x 10(-8). (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2010.03.037

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  • Observation of a Charmoniumlike Enhancement in the gamma gamma -&gt;omega J/psi Process 査読

    S. Uehara, T. Aushev, A. M. Bakich, K. Belous, V. Bhardwaj, M. Bischofberger, M. Bracko, T. E. Browder, P. Chang, A. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, A. Drutskoy, S. Eidelman, D. Epifanov, M. Feindt, N. Gabyshev, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, N. J. Joshi, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, E. Solovieva, M. Staric, Y. Teramoto, K. Trabelsi, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. Vervink, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, C. C. Zhang, T. Zivko, O. Zyukova

    PHYSICAL REVIEW LETTERS   104 ( 9 )   092001-1 - 092001-6   2010年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the results of a search for a charmoniumlike state produced in the process gamma gamma -&gt; omega J/psi in the 3.9-4.2 GeV = c(2) mass region. We observe a significant enhancement, which is well described by a resonant shape with mass M = (3915 +/- 3 +/- 2_ MeV/c(2) and total width Gamma = (17 +/- 10 +/- 3) MeV. This enhancement may be related to one or more of the three charmoniumlike states so far reported in the 3.90-3.95 GeV= c(2) mass region.

    DOI: 10.1103/PhysRevLett.104.092001

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  • Evidence for a New Resonance and Search for the Y(4140) in the gamma gamma -&gt; phi J/psi Process 査読

    C. P. Shen, C. Z. Yuan, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, J. Dalseno, A. Das, Z. Dolezal, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, B. Golob, H. Ha, J. Haba, B. -Y. Han, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, N. J. Joshi, T. Julius, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. H. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, P. Kodys, S. Korpar, M. Kreps, P. Krizan, P. Krokovny, T. Kuhr, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, T. Mori, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petric, L. E. Piilonen, M. Roehrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. E. Sevior, M. Shapkin, J. -G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, A. Sokolov, E. Solovieva, M. Staric, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, T. Zivko, O. Zyukova

    PHYSICAL REVIEW LETTERS   104 ( 11 )   112004-1 - 112004-5   2010年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The process gamma gamma -&gt; phi J/psi is measured using a data sample of 825 fb(-1) collected with the Belle detector. A narrow peak of 8:8(-3.2)(+4.2) events, with a significance of 3.2 standard deviations including systematic uncertainty, is observed. The mass and natural width of the structure [named X(4350)] are measured to be [4350.6(-5.1)(+4.6)(stat) +/- 0.7(syst)] MeV/c(2) and [13(-9)(+18)(stat) +/- 4(syst)] MeV, respectively. The product of its two-photon decay width and branching fraction to phi J/psi is 6.7(-2.4)(+3.2) (stat) +/- 1.1(syst)] eV for J(P) = 0(+), or [1.5(-0.6)(+0.7) (stat) +/- 0.3 (syst)]eV for J(P) = 2(+). No signal for the Y(4140) -&gt;phi J/psi structure reported by the CDF Collaboration in B -&gt; K+ phi J/psi decays is observed, and limits of Gamma(gamma gamma) (Y(4140))B(Y(4140) -&gt; phi J/psi) &lt; 41 eV for J(P) = 0(+) or &lt;6.0 eV for J(P) = 2(+) are determined at the 90% C. L. This disfavors the scenario in which the Y(4140) is a D-s*D-+(s)*(-) molecule.

    DOI: 10.1103/PhysRevLett.104.112004

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  • Measurement of the branching fractions for B-0 -&gt; Ds(*+)pi(-) and B-0 -&gt; Ds*-K+ decays 査読

    N. J. Joshi, T. Aziz, K. Trabelsi, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, Y. Chao, A. Chen, P. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, J. Dalseno, A. Das, Z. Dolezal, Z. Drasal, A. Drutskoy, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, B. -Y. Han, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, T. Julius, J. H. Kang, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, M. Kreps, P. Krizan, P. Krokovny, T. Kuhr, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, M. J. Lee, S. -H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, Y. Miyazaki, R. Mizuk, T. Mori, E. Nakano, M. Nakao, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, H. Park, H. K. Park, M. Petric, L. E. Piilonen, A. Poluektov, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, J. Stypula, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, S. Uehara, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, J. Wiechczynski, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   81 ( 3 )   031101-1 - 031101-6   2010年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a study of B-0 -&gt; D-s*(+)pi(-) and B-0 -&gt; D-s*K--(+) decays based on a sample of 657 x 10(6) B (B) over bar events collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure the branching fractions to be B(B-0 -&gt; D-s*(+)pi(-)) = (1.75 +/- 0.34(stat) +/- 0.17(syst) +/- 0.11(B)) x 10(-5) and B(B-0 -&gt; D-s*K--(+)) = (2.02 +/- 0.33(stat) +/- 0.18(syst) +/- 0.13(B)) x 10(-5), with significances of 6.1 and 8.0 standard deviations, respectively. The first uncertainty is statistical, the second is due to the experimental systematics, and the third is from uncertainties in the D-s(+) decay branching fractions. From our measurements, we obtain the most precise determination so far of R-D*pi, where R-D*pi is the ratio between amplitudes of the doubly Cabibbo-suppressed decay B-0 -&gt; D*(+)pi(-) and the Cabibbo-favored B-0 -&gt; D*(-)pi(+) decay.

    DOI: 10.1103/PhysRevD.81.031101

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  • Measurement of CP asymmetries in B-0 -&gt; K-0 pi(0) decays 査読

    M. Fujikawa, Y. Yusa, J. Dalseno, M. Hazumi, K. Sumisawa, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, S. -K. Choi, Y. Choi, W. Dungel, S. Eidelman, M. Feindt, P. Goldenzweig, H. Ha, J. Haba, B. -Y. Han, K. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, T. Julius, J. H. Kang, H. Kawai, C. Kiesling, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, M. Kreps, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, Y. -J. Kwon, S. -H. Kyeong, S. -H. Lee, J. Li, C. Liu, D. Liventsev, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, M. Rozanska, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, M. Shapkin, V. Shebalin, C. P. Shen, J. -G. Shiu, J. B. Singh, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, A. Zupanc

    PHYSICAL REVIEW D   81 ( 1 )   011101-1 - 011101-7   2010年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurements of CP violation parameters in B-0 -&gt; K-0 pi(0) decays based on a data sample of 657 X 10(6)B (B) over bar pairs collected with the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider. We use B-0 -&gt; K-S(0)pi(0) decays for both mixing-induced and direct CP violating asymmetry measurements and B-0 -&gt; K-L(0)pi(0) decays for the direct CP violation measurement. The CP violation parameters obtained are sin2 phi(eff)(1) - +0.67 +/- 0.31(stat) +/- 0.08(syst) and A(K0 pi 0) - +0.14 +/- 0.13(stat) +/- 0.06(syst). The branching fraction of B-0 -&gt; K-0 pi(0) decay is measured to be B(B-0 -&gt; K-0 pi(0)) - (8.7 +/- 0.5(stat) +/- 0.6(syst)) X 10(-6). The observed A(K0 pi 0) value differs by 1.9 standard deviations from the value expected from an isospin sum rule.

    DOI: 10.1103/PhysRevD.81.011101

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  • Search for lepton flavor and lepton number violating tau decays into a lepton and two charged mesons 査読

    Y. Miyazaki, H. Aihara, K. Arinstein, V. Aulchenko, I. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, M. Bracko, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, W. Dungel, S. Eidelman, D. Epifanov, M. Feindt, N. Gabyshev, A. Garmash, P. Goldenzweig, H. Ha, J. Haba, K. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. O. Kim, J. H. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, S. -H. Lee, T. Lesiak, J. Li, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. Shapkin, V. Shebalin, J. -G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   682 ( 4-5 )   355 - 362   2010年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We search for lepton flavor and lepton number violating tau decays into a lepton (l = electron or muon) and two charged mesons (h, h&apos; = pi(+/-) or K(+/-)), tau(-) -&gt; l(-)h(+)h&apos;(-) and tau- -&gt; l(+)h(-)h&apos;(-), using 671 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We obtain 90% C.L. upper limits on the branching fractions in the range (4.4-8.8) x 10(-8) for tau -&gt; ehh&apos;, and (3.3-16) x 10(-8) for tau -&gt; mu hh&apos; processes. These results improve upon previously published upper limits by factors between 1.6 to 8.8. (C) 2009 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2009.11.061

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  • Measurement of D+-&gt;(KSK+)-K-0 and D-s(+)-&gt; K-S(0)pi(+) branching ratios 査読

    E. Won, B. R. Ko, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, A. Chen, P. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, J. Dalseno, A. Das, S. Eidelman, D. Epifanov, S. Esen, N. Gabyshev, A. Garmash, B. Golob, H. Ha, J. Haba, B. -Y. Han, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, T. Julius, J. H. Kang, N. Katayama, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. H. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, S. Korpar, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, F. Mandl, S. McOnie, H. Miyata, Y. Miyazaki, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, K. S. Park, L. S. Peak, R. Pestotnik, M. Petric, L. E. Piilonen, A. Poluektov, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, M. E. Sevior, M. Shapkin, V. Shebalin, J. -G. Shiu, B. Shwartz, P. Smerkol, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   80 ( 11 )   111101-1 - 111101-5   2009年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report an improved measurement of D+-&gt;(KSK+)-K-0 and D-s(+)-&gt; K-S(0)pi(+) branching ratios using 605 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured branching ratios with respect to the Cabibbo-favored modes are B(D+-&gt;(KSK+)-K-0)/B(D+-&gt; K-S(0)pi(+))=0.1899 +/- 0.0011 +/- 0.0022 and B(D-s(+)-&gt; K-S(0)pi(+))/B(D-s(+)-&gt;(KSK+)-K-0)=0.0803 +/- 0.0024 +/- 0.0019 where the first uncertainties are statistical and the second are systematic.

    DOI: 10.1103/PhysRevD.80.111101

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  • Evidence of time-dependent CP violation in the decay B-0 -&gt; D*+D*- 査読

    K. Vervink, T. Aushev, O. Schneider, K. Arinstein, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, C. -C. Chiang, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Danilov, W. Dungel, S. Eidelman, S. Fratina, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lee, M. J. Lee, J. Li, A. Limosani, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, J. Schuemann, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, S. Stanic, J. Stypula, T. Sumiyoshi, N. Tamura, Y. Teramoto, K. Trabelsi, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, C. C. Wang, C. H. Wang, P. Wang, Y. Watanabe, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, N. Zwahlen

    PHYSICAL REVIEW D   80 ( 11 )   111104-1 - 111104-6   2009年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the CP-odd fraction and the time-dependent CP violation in B-0 -&gt; D*+D*- decays, using 657x10(6) BB events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure a CP-odd fraction of R-perpendicular to=0.125 +/- 0.043(stat)+/- 0.023(syst). From the distributions of the proper-time intervals between a B-0 -&gt; D*+D*- decay and the other B meson in the event, we obtain evidence of CP violation with measured parameters A(D)(*+)D(*-)=0.15 +/- 0.13(stat)+/- 0.04(syst) and SD*+D*-=-0.96 +/- 0.25(stat)(-0.16)(+0.13)(syst).

    DOI: 10.1103/PhysRevD.80.111104

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  • Measurement of the e(+)e(-)-&gt;(DD*-)-D-0 pi(+) cross section using initial-state radiation 査読

    G. Pakhlova, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, W. Dungel, S. Eidelman, D. Epifanov, M. Feindt, N. Gabyshev, A. Garmash, P. Goldenzweig, B. Golob, H. Ha, J. Haba, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, H. O. Kim, J. H. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, S. -H. Lee, T. Lesiak, J. Li, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mueller, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. Shapkin, V. Shebalin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   80 ( 9 )   091101-1 - 091101-7   2009年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurements of the exclusive cross section for e(+)e(-)-&gt;(DD*-)-D-0 pi(+) as a function of center-of-mass energy from the (DD*-)-D-0 pi(+) threshold to 5.2 GeV with initial-state radiation. No evidence is found for Y(4260)-&gt;(DD*-)-D-0 pi(+) decays. The analysis is based on a data sample collected with the Belle detector at or near a center-of-mass energy of 10.58 GeV with an integrated luminosity of 695 fb(-1) at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.80.091101

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  • Measurement of the Differential Branching Fraction and Forward-Backward Asymmetry for B -&gt; K((*))l(+) l(-) 査読

    J-T. Wei, P. Chang, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y-W. Chang, Y. Chao, A. Chen, K-F. Chen, B. G. Cheon, C-C. Chiang, I-S. Cho, Y. Choi, J. Dalseno, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, B-Y. Han, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Horii, Y. Hoshi, W-S. Hou, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y-J. Kwon, S-H. Kyeong, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, C. Liu, D. Liventsev, R. Louvot, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, C. W. Park, H. Park, H. K. Park, K. S. Park, L. E. Piilonen, M. Rozanska, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J-G. Shiu, B. Shwartz, S. Stanic, M. Staric, T. Sumiyoshi, S. Suzuki, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. C. Wang, C. H. Wang, M-Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Z. P. Zhang, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   103 ( 17 )   171801-1 - 171801-6   2009年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We study B -&gt; Kd(*)l(+)l(-) decays (l = e,u) based on a data sample of 657 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB e(+)e(-) collider. We report the differential branching fraction, isospin asymmetry, K* polarization, and the forward-backward asymmetry (A(FB)) as functions of q(2) = M(ll)(2)c(2). The fitted A(FB) spectrum exceeds the standard model expectation by 2.7 standard deviations. The measured branching fractions are B(B -&gt; K*l(+)l(-)) = (10: 7(-1.0)(+1.1)) x 10(-7) and B(B -&gt; Kl(+)l(-)) = (4.8 (+0.5)(-0.4) +/- 0.3) x 10(-7), where the first errors are statistical and the second are systematic, with the muon to electron ratios R-K* = 0.83 +/- 0: 17 +/- 0.08 and R-K = 1.03 +/- 0.19 +/- 0.06.

    DOI: 10.1103/PhysRevLett.103.171801

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  • Measurements of charmless hadronic b -&gt; s penguin decays in the pi(+)pi K--(+)pi(-) final state and first observation of B-0 -&gt; rho K-0(+)pi(-) 査読

    S. -H. Kyeong, Y. -J. Kwon, I. Adachi, H. Aihara, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, M. Bischofberger, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, J. Dalseno, A. Das, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, H. Ha, J. Haba, B. -Y. Han, T. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Hoshi, H. J. Hyun, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, R. Kumar, M. J. Lee, T. Lesiak, J. Li, C. Liu, Y. Liu, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, R. Sinha, A. Sokolov, S. Stanic, M. Staric, J. Stypula, K. Sumisawa, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, Y. Unno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   80 ( 5 )   051103-1 - 051103-6   2009年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurements of charmless hadronic B-0 decays into the pi(+)pi K--(+)pi(-) final state. The analysis uses a sample of 657 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider at the resonance. The decay B-0 -&gt; rho K-0(+)pi(-) is observed for the first time; the significance is 5.0 sigma and the corresponding partial branching fraction for M-K pi is an element of (0.75, 1.20) GeV/c(2) is [2.8 +/- 0.5(stat) +/- 0.5(syst)] x 10(-6). We also obtain the first evidence for B-0 -&gt; f(0)(980)K+pi(-) with 3.5 sigma significance and for B-0 -&gt; pi(+)pi K-*(0) with 4.5 sigma significance. For the two-body decays B-0 -&gt; rho K-0*(0) and B-0 -&gt; f(0)(980)K*(0), the significance are 2.7 sigma and 2.5 sigma, respectively, and the upper limits on the branching fractions are 3.4 x 10(-6) and 2.2 x 10(-6) at 90% confidence level.

    DOI: 10.1103/PhysRevD.80.051103

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  • Measurement of y(CP) in D-0 meson decays to the (KSK+K-)-K-0 final state 査読

    A. Zupanc, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, M. Bischofberger, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, J. Dalseno, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, B. -Y. Han, T. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, H. J. Hyun, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, Y. -J. Kwon, S. -H. Kyeong, M. J. Lee, T. Lesiak, J. Li, C. Liu, Y. Liu, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, A. J. Schwartz, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, O. Zyukova

    PHYSICAL REVIEW D   80 ( 5 )   052006-1 - 052006-11   2009年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the D-0 - (D) over bar (0) mixing parameter y(CP) using a flavor-untagged sample of D-0 -&gt; (KSK+K-)-K-0 decays. The measurement is based on a 673 fb(-1) data sample recorded with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Using a method based on measuring the mean decay time for different K+K- invariant mass intervals, we find y(CP) = (+0.11 +/- 0.61(stat.) +/- 0.52(syst.))%.

    DOI: 10.1103/PhysRevD.80.052006

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  • Observation of the phi(1680) and the Y(2175) in e(+)e(-) -&gt; phi pi(+)pi(-) 査読

    C. P. Shen, C. Z. Yuan, P. Wang, X. L. Wang, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, A. M. Bakich, E. Barberio, K. Belous, M. Bischofberger, A. Bondar, M. Bracko, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Crnkovic, J. Dalseno, M. Danilov, M. Dash, W. Dungel, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, P. Goldenzweig, H. Ha, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, S. Korpar, M. Kreps, P. Krizan, P. Krokovny, W. Kuehn, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. -H. Lee, T. Lesiak, J. Li, A. Limosani, C. Liu, D. Liventsev, R. Louvot, F. Mandl, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, L. E. Piilonen, A. Poluektov, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, V. Shebalin, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, M. -Z. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   80 ( 3 )   031101-1 - 031101-7   2009年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The cross sections for e(+)e(-) -&gt; phi pi(+)pi(-) and e(+)e(-) -&gt; phi f(0)(980) are measured from threshold to root s = 3.0 GeV using initial-state radiation. The analysis is based on a data sample of 673 fb(-1) collected on and below the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. First measurements are reported for the resonance parameters of the phi(1680) in the phi pi(+)pi(-) mode: m = (1689 +/- 7 +/- 10) MeV/c(2) and Gamma = (211 +/- 14 +/- 19) MeV/c(2). A structure at root s = 2.1 GeV/c(2), corresponding to the so called Y(2175), is observed; its mass and width are determined to be (2079 +/- 13(-28)(+79)) MeV/c(2) and (192 +/- 23(-61)(+25)) MeV/c(2), respectively.

    DOI: 10.1103/PhysRevD.80.031101

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  • High-statistics study of eta pi(0) production in two-photon collisions 査読

    S. Uehara, Y. Watanabe, H. Nakazawa, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, A. M. Bakich, K. Belous, A. Bondar, M. Bracko, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, R. Chistov, Y. Choi, J. Crnkovic, J. Dalseno, M. Dash, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, P. Goldenzweig, H. Ha, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, H. Kichimi, C. Kiesling, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, S. -H. Lee, J. Li, A. Limosani, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Palka, C. W. Park, H. Park, H. K. Park, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, R. Wedd, E. Won, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   80 ( 3 )   032001-1 - 032001-17   2009年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The differential cross section for the process gamma gamma -&gt; eta pi(0) has been measured in the kinematic range 0.84 GeV &lt; W &lt; 4.0 GeV, vertical bar cos theta*vertical bar &lt; 0.8, where W and theta* are the energy and pi(0) (or eta) scattering angle, respectively, in the gamma gamma center-of-mass system. The results are based on a 223 fb(-1) data sample collected with the Belle detector at the KEKB e(+)e(-) collider. Clear peaks due to the a(0)(980) and a(2)(1320) are visible. The differential cross sections are fitted in the energy region 0.9 GeV &lt; W &lt; 1.46 GeV to obtain the parameters of the a(0)(980). Its mass, width and Gamma B-gamma gamma(eta pi(0)) are measured to be 982.3(-0.7-4.7)(+0.6+3.1) MeV/c(2), 75.6 +/- 1.6(-10.0)(+17.4) 128(-2-43)(+3+502) eV, respectively. The energy and angular dependences above 3.1 GeV are compared with those measured in the pi(0)pi(0) channel. The integrated cross section over vertical bar cos theta*vertical bar &lt; 0.8 has a W-n dependence with n = 10.5 +/- 1.2 +/- 0.5, which is slightly larger than that for pi(0)pi(0). The differential cross sections show a sin(-4)theta* dependence similar to gamma gamma -&gt; pi(0)pi(0). The measured cross section ratio, sigma(eta pi(0))/sigma(pi(0)pi(0)) = 0.48 +/- 0.05 +/- 0.04, is consistent with a QCD-based prediction.

    DOI: 10.1103/PhysRevD.80.032001

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  • Dalitz analysis of B -&gt; K pi(+)psi ' decays and the Z(4430)(+) 査読

    R. Mizuk, Belle Collaboration, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, B. G. Cheon, C. -C. Chiang, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, B. -Y. Han, T. Hara, Y. Hasegawa, K. Hayasaka, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, C. Liu, Y. Liu, D. Liventsev, R. Louvot, D. Marlow, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. Sekiya, K. Senyo, M. Shapkin, V. Shebalin, J. -G. Shiu, B. Shwartz, S. Stanic, M. Staric, T. Sumiyoshi, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   80 ( 3 )   031104-1 - 031104-7   2009年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    DOI: 10.1103/PhysRevD.80.031104

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  • Observation of the Doubly Cabibbo-Suppressed Decay D-s(+)-&gt; K+K+pi(-) 査読

    B. R. Ko, E. Won, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, A. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, B. -Y. Han, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, H. J. Hyun, R. Itoh, M. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krokovny, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, C. Liu, Y. Liu, D. Liventsev, R. Louvot, J. MacNaughton, F. Mandl, S. McOnie, T. Medvedeva, H. Miyata, Y. Miyazaki, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, S. Stanic, M. Staric, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trebelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, G. Varner, K. E. Varvell, K. Vervink, C. C. Wang, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   102 ( 22 )   221802-1 - 221802-5   2009年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of the doubly Cabibbo-suppressed decay D-s(+)-&gt; K+K+pi(-) using 605 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The branching ratio with respect to its Cabibbo-favored counterpart B(D-s(+)-&gt; K+K+pi(-))/B(D-s(+)-&gt; K+K-pi(+)) is (0.229 +/- 0.028 +/- 0.012)%, where the first uncertainty is statistical and the second is systematic. We also report a significantly improved measurement of the doubly Cabibbo-suppressed decay D+-&gt; K+pi(+)pi(-), with a branching ratio B(D+-&gt; K+pi(+)pi(-))/B(D+-&gt; K-pi(+)pi(+))=(0.569 +/- 0.018 +/- 0.014)%.

    DOI: 10.1103/PhysRevLett.102.221802

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  • Measurement of the e(+)e(-)-&gt; J/psi c&lt;overline&gt;c&lt;/overline&gt; cross section at &lt;radical&gt;&lt;radicand&gt;s&lt;/radicand&gt;&lt;/radical&gt;approximate to 10.6 GeV 査読

    P. Pakhlov, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, A. Bondar, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, B. G. Cheon, R. Chistov, S. -K. Choi, Y. Choi, M. Danilov, M. Dash, A. Drutskoy, W. Dungel, S. Eidelman, D. Epifanov, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, B. -Y. Han, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, Y. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, H. Kawai, T. Kawasai, H. Kichimi, H. O. Kim, Y. I. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, Y. Liu, D. Liventsev, R. Louvot, F. Mandl, A. Matyja, S. McOnie, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, M. Nakao, H. Nakazawa, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   79 ( 7 )   071101-1 - 071101-7   2009年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a new measurement of the e(+)e(-)-&gt; J/psi c(c)over bar cross section where the c(c)over bar pair can fragment either into charmed hadrons or a charmonium state. In the former case the J/psi and a charmed hadron are reconstructed, while the latter process is measured using the recoil mass technique, which allows the identification of two-body final states without reconstruction of one of the charmonia. The measured e(+)e(-)-&gt; J/psi c(c)over bar cross section is (0.74 +/- 0.08(-0.08)(+0.09)) pb, and the e(+)e(-)-&gt; J/psi Xnon-c(c)over bar cross section is (0.43 +/- 0.09 +/- 0.09) pb. We note that the measured cross sections are obtained from a data sample with the multiplicity of charged tracks in the event larger than 4; corrections for the effect of this requirement are not performed as this cannot be done in a model-independent way. The analysis is based on a data sample with an integrated luminosity of 673 fb(-1) recorded near the Upsilon(4S) resonance with the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider.

    DOI: 10.1103/PhysRevD.79.071101

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  • Search for the X(1812) in B-+/--&gt; K-+/-omega phi 査読

    C. Liu, Z. P. Zhang, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, V. Bhardwaj, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, J. Dalseno, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, H. Ha, J. Haba, B. -Y. Han, K. Hayasaka, M. Hazumi, Y. Hoshi, H. J. Hyun, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. O. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, S. Korpar, P. Krizan, P. Krokovny, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, J. Schuemann, R. Seidl, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. C. Wang, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, C. C. Zhang, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   79 ( 7 )   071102-1 - 071102-6   2009年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report on a search for the X(1812) state in the decay B-+/--&gt; K-+/-omega phi with a data sample of 657x10(6) B&lt;overline&gt;B&lt;/overline&gt; pairs collected with the Belle detector at the KEKB e(+)e(-) collider. No significant signal is observed. An upper limit B(B-+/--&gt;(KX)-X-+/-(1812),X(1812)-&gt;omega phi)&lt; 3.2x10(-7) (90% C.L.) is determined. We also constrain the three-body decay branching fraction to be B(B-+/--&gt; K-+/-omega phi)&lt; 1.9x10(-6) (90% C.L.).

    DOI: 10.1103/PhysRevD.79.071102

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  • Time-dependent Dalitz plot measurement of CP parameters in B-0 -&gt; K-S(0)pi(+)pi(-) decays 査読

    J. Dalseno, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, A. Bay, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, M. Dash, A. Drutskoy, S. Eidelman, M. Fujikawa, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, B. -Y. Han, K. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lee, S. E. Lee, J. Li, S. -W. Lin, C. Liu, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, Y. Nakahama, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, M. Rozanska, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   79 ( 7 )   072004   2009年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a time-dependent Dalitz plot measurement of CP violation parameters in B-0 -&gt; K-S(0)pi(+)pi(-) decays. These results are obtained from a large data sample that contains 657x10(6) B(B)over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. For the CP violation parameters, we obtain two consistent solutions that describe the data well. The first of these solutions may be preferred by external information from other measurements. There is no evidence for direct CP violation in B-0 -&gt;rho(0)(770)K-S(0), B-0 -&gt; f(0)(980)K-S(0) and B-0 -&gt; K*+(892)pi(-), while measurements of mixing-induced CP violation in B-0 -&gt;rho(0)(770)K-S(0) and B-0 -&gt; f(0)(980)K-S(0) decays are consistent with that of b -&gt; c(c)over bars decays. We also measured the phase difference between B-0 -&gt; K*+(892)pi(-) and (B)over bar(0)-&gt; K*-(892)pi(+), which may be used to extract phi(3).

    DOI: 10.1103/PhysRevD.79.072004

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  • High-statistics study of neutral-pion pair production in two-photon collisions 査読

    S. Uehara, Y. Watanabe, H. Nakazawa, H. Aihara, K. Arinstein, V. Aulchenko, A. M. Bakich, E. Barberio, K. Belous, V. Bhardwaj, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, M. Dash, S. Eidelman, D. Epifanov, N. Gabyshev, P. Goldenzweig, H. Ha, J. Haba, B. -Y. Han, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, Y. Iwasaki, N. J. Joshi, D. H. Kah, N. Katayama, T. Kawasaki, H. Kichimi, H. O. Kim, Y. I. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, M. J. Lee, T. Lesiak, Y. Liu, D. Liventsev, R. Louvot, S. McOnie, H. Miyata, R. Mizuk, Y. Nagasaka, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. Shapkin, J. -G. Shiu, B. Shwartz, M. Staric, T. Sumiyoshi, M. Tanaka, Y. Teramoto, I. Tikhomirov, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   79 ( 5 )   052009-1 - 052009-13   2009年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The differential cross sections for the process gamma gamma -&gt; pi(0)pi(0) have been measured in the kinematic range 0.6 GeV &lt; W &lt; 4.1 GeV, vertical bar cos theta* vertical bar &lt; 0.8 in energy and pion scattering angle, respectively, in the gamma gamma center-of-mass system. The results are based on a 223 fb(-1) data sample collected with the Belle detector at the KEKB e(+)e(-) collider. The differential cross sections are fitted in the energy region 1.7 GeV &lt; W &lt; 2.5 GeV to confirm the two-photon production of two pions in the G wave. In the higher-energy region, we observe production of the chi(c0) charmonium state and obtain the product of its two-photon decay width and branching fraction to pi(0)pi(0). We also compare the observed angular dependence and ratios of cross sections for neutral-pion and charged-pion pair production to QCD models. The energy and angular dependence above 3.1 GeV are compatible with those measured in the pi(+)pi(-) channel, and in addition we find that the cross section ratio, sigma(pi(0)pi(0))/sigma(pi(+)pi(-)), is 0.32 +/- 0.03 +/- 0.05 on average in the 3.1-4.1 GeV region.

    DOI: 10.1103/PhysRevD.79.052009

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  • Search for lepton-flavor-violating tau decay into a lepton and an f(0)(980) meson 査読

    Y. Miyazaki, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, A. Bay, I. Bedny, U. Bitenc, A. Bondar, A. Bozeky, M. Bracko, T. E. Browder, A. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, P. Goldenzweig, H. Ha, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, D. Heffernan, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, S. -H. Kyeong, J. S. Lee, J. Li, D. Liventsev, R. Louvot, F. Mandl, S. McOnie, T. Medvedeva, H. Miyata, T. Nagamine, E. Nakano, M. Nakao, H. Nakazawa, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, S. Stanic, M. Staric, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usuki, G. Varner, A. Vinokurova, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamashita, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   672 ( 4-5 )   317 - 322   2009年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We search for lepton-flavor-violating tau decays into a lepton (electron or muon) and an f(0)(980) meson using 671 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No events are observed and we set the following 90% C.L. upper limits on the branching fraction products: beta(tau(-) -&gt; e(-) f(0)(980)) x beta(f(0)(980) -&gt; pi(+)pi(-)) &lt; 3.2 x 10(-8) and beta(tau(-) -&gt; mu(-) f(0)(980)) x beta(f(0)(980) -&gt; pi(+)pi(-)) &lt; 3.4 x 10(-8). This is the first search performed for these modes. (c) 2009 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2009.01.058

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  • Evidence for the ηb(2S) and observation of h b(1P)→ηb(1S)γ and hb(2P) →ηb(1S)γ 査読

    R. Mizuk, D. M. Asner, A. Bondar, T. K. Pedlar, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, A. Bay, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, G. Bonvicini, A. Bozek, M. Bračko, M. Bračko, J. Brodzicka, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. S. Cho, K. Cho, S. K. Choi, Y. Choi, J. Dalseno, J. Dalseno, M. Danilov, Z. Doležal, Z. Drásal, A. Drutskoy, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, B. Golob, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, T. Iijima, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, P. Kapusta, T. Kawasaki, H. J. Kim, H. O. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Koblitz, P. Kodyš, S. Korpar, S. Korpar, R. T. Kouzes, P. Križan, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, J. Libby, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata

    Physical Review Letters   109 ( 23 )   2009年2月

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    We report the first evidence for the ηb(2S) using the h b(2P)→ηb(2S)γ transition and the first observation of the hb(1P)→ηb(1S)γ and hb(2P)→ηb(1S)γ transitions. The mass and width of the ηb(1S) and ηb(2S) are measured to be mηb (1S)=(9402.4±1.5±1.8) MeV/c2, m ηb (2S)=(9999.0±3.5-1.9+2.8) MeV/c2, and Γηb (1S)=(10.8-3.7-2.0+4.0+4.5) MeV. We also update the hb(1P) and hb(2P) mass measurements. We use a 133.4 fb-1 data sample collected at energies near the γ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e - collider. © 2012 American Physical Society.

    DOI: 10.1103/PhysRevLett.109.232002

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  • Study of Omega(0)(c) and Omega(c)*(0) baryons at Belle 査読

    E. Solovieva, R. Chistov, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, U. Bitenc, A. Bondar, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, H. Ha, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, C. Liu, D. Liventsev, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, M. Nakao, S. Nishidai, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, H. Palka, H. K. Park, L. S. Peak, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, J. -G. Shiu, S. Stanic, M. Staric, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   672 ( 1 )   1 - 5   2009年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We report results from a study of the charmed double strange baryons Omega(0)(c) and Omega(c)*(0) at Belle. The Omega(0)(c) is reconstructed using the Omega(0)(c) -&gt; Omega(-)pi(+) decay mode, and its mass is measured to be (2693.6 +/- 0.3(-1.5)(+1.8)) MeV/c(2). The Omega(c)*(0) baryon is reconstructed in the Omega(0)(c)gamma mode. The mass difference M-Omega c*0 - M-Omega c0 is measured to be (70.7 +/- 0.9(-0.9)(+0.1)) MeV/c(2). The analysis is performed using 673 fb(-1) of data on and near the gamma(4S) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. (C) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2008.12.062

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  • Precise measurement of hadronic tau-decays with an eta meson 査読

    K. Inami, T. Ohshima, H. Kaji, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, I. Bedny, V. Bhardwaj, A. Bondar, M. Bracko, T. E. Browder, M. -C. Chang, Y. Chao, R. Chistov, I-S. Cho, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, D. Epifanov, N. Gabyshev, B. Golob, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, Y. Iwasaki, D. H. Kah, J. H. Kang, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, R. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, A. Limosani, S-W Lin, R. Louvot, F. Mandl, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, H. Nakazawa, O. Nitoh, S. Noguchi, S. Ogawa, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, K. S. Park, L. S. Peak, L. E. Piilonen, A. Poluektov, Y. Sakai, O. Schneider, M. Shapkin, V. Shebalin, J. -G. Shiu, B. Shwartz, J. B. Singh, S. Stanic, M. Staric, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Uehara, T. Uglov, S. Uno, Y. Usov, Y. Usuki, G. Varner, A. Vinokurova, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   672 ( 3 )   209 - 218   2009年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We have studied hadronic tau decay modes involving an eta meson using 490 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The following branching fractions have been measured B(tau(-) -&gt; K(-)eta nu(tau)) = (1.58 +/- 0.05 +/- 0.09) x 10(-4), B(tau(-) -&gt; K(-)pi(0)eta nu(tau)) = (4.6 +/- 1.1 +/- 0.4) x 10(-5), B(tau(-) -&gt; pi(-)pi(0)eta nu(tau)) = 1.35 +/- 0.03 +/- 0.07)x10(-3), B(tau(-)-&gt; pi(-)K(S)(0) eta nu(tau)) = 4.4 +/- 0.7 +/- 0.2) x 10(-5) and B(tau(-) -&gt; K*(-) eta nu(tau)) = (1.34 +/- 0.12 +/- 0.09) x 10(-4). These result are substantially more precise than previous measurements. The new measurements are compared with theoretical calculations based on the CVC hypothesis or the chiral pertubation theory. We also set upper limits on branching fractions for tau decays into K(-)K(S)(0)eta nu(tau), pi(-)K(S)(0)pi(0)eta nu(tau), K(-)eta eta nu(tau), pi(-)eta eta nu(tau) and non-resonant K(-)pi(0)eta nu(tau) final states (C) 2009 Published by Elseiver B.V.

    DOI: 10.1016/j.physletb.2009.01.047

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  • Measurement of the Decay B-s(0) -&gt; D-s(-)pi(+) and Evidence for B-s(0) -&gt; (DsK +/-)-K--/+ in e(+) e(-) Annihilation at root s approximate to 10.87 GeV 査読

    R. Louvot, J. Wicht, O. Schneider, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, A. Bay, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, C. W. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, J. Schumann, A. J. Schwartz, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, J. -G. Shiu, J. B. Singh, A. Somov, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, C. C. Wang, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, N. Zwahlen, O. Zyukova

    PHYSICAL REVIEW LETTERS   102 ( 2 )   021801-1 - 021801-6   2009年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We have studied B-s(0) -&gt; D-s(-)pi(+) and B-s(0) -&gt; (DsK +/-)-K--/+ decays using 23.6 fb(-1) of data collected at the Y(5S) resonance with the Belle detector at the KEKB e(+) e(-) collider. This highly pure B-s(0) -&gt; D-s(-)pi(+) sample is used to measure the branching fraction, B(B-s(0) -&gt; D-s(-)pi(+)) = [3.67(-0.33)(+0.35)(stat)(-0.42)(+0.43)(syst) +/- 0.49(f(s))] x 10(-3) (f(s) = N-Bs(*)(B) over bars(*)/N-b (b) over bar and the fractions of B-s(0) event types at the Y(d5S) energy, in particular N-Bs(*)(B) over bars(*)/N-Bs(*)(B) over bars(*) = (90.1(-4.0)(+3.8) +/- 0.2)%. We also determine the masses M(B-s(0)) = (5364.4 +/- 1.3 +/- 0.7) MeV/c(2) and M(B-s*) = (5416.4 +/- 0.4 +/- 0.5) MeV/c(2). In addition, we observe B-s(0) -&gt; (DsK +/-)-K--/+ decays with a significance of 3.5 sigma and measure B(B-s(0) -&gt; (DsK +/-)-K--/+) = [2.4-1.0+1.2(stat) +/- 0.3(syst) +/- 0.3(f(s))] x 10(-4).

    DOI: 10.1103/PhysRevLett.102.021801

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  • Searches for LFV at B factories 査読

    K. Hayasaka

    Journal of Physics: Conference Series   171   2009年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Institute of Physics Publishing  

    Lepton-flavor violating (LFV) decay in τ, B and γ(nS) is expected to be very small in the Standard Model, even taking into account the effect of neutrino mixing. Therefore, the observation of such decays would be a clear signal of new physics. The production rate of τ pairs at B factory is comparable to that of B meson pairs and hence B factories are also excellent τ factories. Many LFV decay modes have been searched for at the B factories. We present the current status of searches for tau LFV decays as well as B and γ(nS) LFV decays. Some of the upper limits are now reaching to a range predicted by some new physics models. © 2009 IOP Publishing Ltd.

    DOI: 10.1088/1742-6596/171/1/012079

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  • Evidence for Neutral B Meson Decays to omega K*(0) 査読

    P. Goldenzweig, A. J. Schwartz, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, A. Bay, I. Bedny, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, B. G. Cheon, C. -C. Chiang, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, B. Golob, H. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, M. Iwasaki, D. H. Kah, J. H. Kang, T. Kawasaki, H. Kichimi, H. J. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, C. Liu, Y. Liu, J. MacNaughton, F. Mandl, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Nagamine, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, C. Schwanda, R. Seidl, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. -G. Shiu, J. B. Singh, A. Somov, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, S. Suzuki, N. Tamura, M. Tanaka, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova, Belle Collaboration

    PHYSICAL REVIEW LETTERS   101 ( 23 )   231801-1 - 231801-6   2008年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present the results of a study of the charmless vector-vector decay B-0 -&gt; omega K*(0) with 657 X 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB e(+)e(-) collider. We measure the branching fraction to be B(B-0 -&gt; omega K*(0)) = [1.8 +/- 0.7(stat) +/- 0.3(syst)] X 10(-6) with 3.0 sigma significance. We also perform a helicity analysis of the omega and K*(0) vector mesons, and obtain the longitudinal polarization fraction f(L)(B-0 -&gt; omega K*(0)) = 0.56 +/- 0.29(stat)(-0.08)(+0.18)(syst). Finally, we measure a large nonresonant branching fraction B[B-0 -&gt; omega K+ pi(-); M-K pi is an element of (0.755, 1.250) GeV/c(2)] = [5.1 +/- 0.7(stat) +/- 0.7(syst)] X 10(-6) with a significance of 9.5 sigma.

    DOI: 10.1103/PhysRevLett.101.231801

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  • Measurement of B-0 -&gt; pi(+)pi(-)pi(+)pi(-) decays and search for B-0 -&gt; rho(0)rho(0) 査読

    C. -C. Chiang, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, I. Bedny, V. Bhardwaj, U. Bitenc, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Dash, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, S. E. Lee, J. Li, A. Limosani, S. -W. Lin, C. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, H. Miyata, R. Mizuk, T. Mori, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schumann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, A. Vinokurova, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   78 ( 11 )   111102-1 - 111102-7   2008年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report on a search for the decay B-0 -&gt; rho(0)rho(0) and other charmless modes with a pi(+)pi(-)pi(+)pi(-) final state, including B-0 -&gt; rho(0)pi(+)pi(-), nonresonant B-0 -&gt; 4 pi(+/-), B-0 -&gt; rho(0)f(0)(980), B-0 -&gt; f(0)( 980)f(0)(980) and B-0 -&gt; f(0)(980)pi(+)pi(-). These results are obtained from a data sample containing 657 X 10(6) B (B) over bar collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We set an upper limit on B(B-0 -&gt; rho(0)rho(0)) of 1.0 X 10(-6) at the 90% confidence level (C. L.). From our B-0 -&gt; rho(0)rho(0) measurement and an isospin analysis, we determine the Cabibbo-Kobayashi-Maskawa phase phi(2) to be 91.7 +/- 14.9 degrees. We find excesses in B-0 -&gt; rho(0)pi(+)pi(-) and nonresonant B-0 -&gt; 4 pi(+/-) with 1.3 sigma and 2.5 sigma significance, respectively. The corresponding branching fractions are less than 12.0 X 10(-6) and 19.3 X 10(-6) at the 90% C.L. In addition, we set 90% C.L. upper limits as follows: B(B-0 -&gt; rho(0)f(0)(980)) &lt; 0.3 X 10(-6), B(B-0 -&gt; f(0)(980)f(0)(980)) &lt; 0.1 X 10(-6), and B(B-0 -&gt; f(0)(980)pi(+)pi(-)) &lt; 3.8 X 10(-6).

    DOI: 10.1103/PhysRevD.78.111102

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  • Search for a CP asymmetry in Cabibbo-suppressed D-0 decays 査読

    M. Staric, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, B. G. Cheon, R. Chistov, I-S. Chou, Y. Choi, J. Dalseno, M. Dash, W. Dungel, S. Eidelman, S. Fratina, N. Gabyshev, B. Golob, H. Ha, J. Haba, T. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, M. Hazurmi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, D. H. Kah, H. Kaji, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H Kyeong, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, C. Liu, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   670 ( 3 )   190 - 195   2008年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We measure the CP-violating asymmetries in decays to the D-0 -&gt; K+K- and D-0 -&gt; pi(+)pi(-) CP eigenstates using 540 fb(-1) of data collected with the Belle detector at or near the gamma (4S) resonance. Cabibbo-favored D-0 -&gt; K-pi(+) decays are used to correct for systematic detector effects. The results, A(CP)(KK) = (-0.43 +/- 0.30 +/- 0.11)% and A(CP)(pi pi) = (+0.43 +/- 0.52 +/-.12)%, are consistent with no CP violation. (c) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2008.10.052

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  • Evidence for B0→χc1π0 at Belle 査読

    R. Kumar, J. B. Singh, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, A. Bay, V. Bhardwaj, U. Bitenc, A. Bozek, M. Bračko, T. E. Browder, A. Chen, B. G. Cheon, R. Chistov, I. S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, A. Limosani, S. W. Lin, D. Liventsev, R. Louvot, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, I. Nakamura, E. Nakano, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, A. Sekiya, K. Senyo, M. Shapkin, J. G. Shiu, B. Shwartz, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, C. C. Wang, C. H. Wang, M. Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    Physical Review D - Particles, Fields, Gravitation and Cosmology   78 ( 9 )   2008年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We present a measurement of the branching fraction for the Cabibbo- and color-suppressed B0→χc1π0 decay based on a data sample of 657×106BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe a signal of 40±9 events with a significance of 4.7σ including systematic uncertainties. The measured branching fraction is B(B0→χc1π0)=(1. 12±0.25(stat)±0.12(syst.))×10-5. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.78.091104

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  • Study of intermediate two-body decays in (B)over-bar(0) -&gt; Sigma(c)(2455)(0)(p)over-bar pi(+) 査読

    H. O. Kim, H. Kichimi, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, I. Bedny, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, D. Epifanov, N. Gabyshev, H. Ha, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. J. Kim, Y. I. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, J. S. Lee, M. J. Lee, T. Lesiak, S. -W. Lin, D. Liventsev, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, C. W. Park, H. Park, H. K. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoog, Y. Sakai, O. Schneider, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   669 ( 5 )   287 - 293   2008年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We present results of a detailed study of the three-body (B) over bar (0) -&gt; Sigma(c)(2455)(0)(p) over bar pi(+) decay. A significant enhancement of signal events is observed in the (p) over bar pi(+) invariant mass distribution near 1.5 GeV/c(2) that is consistent with the presence of an intermediate baryonic resonance (N) over bar (0), where (N) over bar (0) is the (N) over bar (1440)P-0(11) or (N) over bar (1535)S-0(11) state, or an admixture of the two states. We measure the product B((B) over bar (0) -&gt; Sigma(c)(2455)(0)(N) over bar (0)) x B((N) over bar (0) -&gt; (p) over bar pi(+)) = (0.80 +/- 0.15(stat.) +/- 0.14(syst.) +/- 0.21) x 10(-4), where the last error is due to the uncertainty in B(Lambda(+)(C) -&gt; pK(-)pi(+)). The significance of the signal is 6.1 standard deviations. This analysis is based on a data sample of 357 fb(-1), accumulated at the gamma(4S) resonance with the Belle detector at the KEKB asyrrimetric-energy e(+)e(-) collider. (C) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2008.09.059

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  • Evidence for B-0 -&gt; chi(c1)pi(0) at Belle 査読

    R. Kumar, J. B. Singh, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, A. Bay, V. Bhardwaj, U. Bitenc, A. Bozek, M. Bracko, T. E. Browder, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, A. Limosani, S. -W. Lin, D. Liventsev, R. Louvot, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, I. Nakamura, E. Nakano, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, A. Sekiya, K. Senyo, M. Shapkin, J. -G. Shiu, B. Shwartz, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Suzuki, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   78 ( 9 )   091104-1 - 091104-6   2008年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the branching fraction for the Cabibbo- and color-suppressed B-0 -&gt; chi(c1)pi(0) decay based on a data sample of 657 x 10(6) B (B) over bar events collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a signal of 40 +/- 9 events with a significance of 4.7 sigma including systematic uncertainties. The measured branching fraction is B(B-0 -&gt; chi(c1)pi(0)) = (1.12 +/- 0.25 (stat) +/- 0.12(syst.)) x 10(-5).

    DOI: 10.1103/PhysRevD.78.091104

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  • Study of the suppressed B meson decay B-→DK-, D→K+π- 査読

    Y. Horii, K. Trabelsi, H. Yamamoto, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, V. Balagura, E. Barberio, I. Bedny, K. Belous, V. Bhardwaj, U. Bitenc, S. Blyth, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, N. Gabyshev, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, C. C. Kuo, Y. Kuroki, A. Kuzmin, Y. J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, S. W. Lin, C. Liu, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, Y. Nagasaka, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. G. Shiu, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, F. Takasaki, N. Tamura, M. Tanaka, Y. Teramoto, T. Tsuboyama, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

    Physical Review D - Particles, Fields, Gravitation and Cosmology   78 ( 7 )   2008年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We report a study of the suppressed B meson decay B-→DK- followed by D→K+π-, where D indicates a D0 or D̄0 state. The two decay paths interfere and provide information on the CP-violating angle 3. We use a data sample containing 657×106 BB̄ pairs recorded at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- storage ring. We do not find significant evidence for the mode B-→DK-, D→K+π-, and set an upper limit of rB&lt
    0.19, where rB is the magnitude of the ratio of amplitudes |A(B-→D̄0K-)/A(B-→D0K-)|. The decay B-→Dπ-, D→K+π- is also analyzed as a reference, for which we observe a signal with 6.6σ significance, and measure the charge asymmetry ADπ to be -0.02-0.16+0.15(stat)±0.04(syst). In addition, the ratio B(B-→D0K-)/B(B-→D0π-) is measured to be [6.77±0.23(stat) ±0.30(syst)]×10-2. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.78.071901

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  • Observation of a Near-Threshold Enhancement in the e(+) e(-)-&gt; Lambda(+)(c) Lambda(-)(c) Cross Section Using Initial-State Radiation 査読

    G. Pakhlova, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, I. Bedny, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, C. -C. Chiang, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, N. Gabyshev, H. Ha, J. Haba, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, C. Liu, D. Liventsev, F. Mandl, A. Matyja, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, H. K. Park, L. S. Peak, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   101 ( 17 )   172001-1 - 172001-6   2008年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the exclusive e(+) e(-) -&gt; Lambda(+)(c)Lambda(-)(c) cross section as a function of center-of-mass energy near the Lambda(+)(c)Lambda(-)(c) threshold. A clear peak with a significance of 8.2 sigma is observed in the Lambda(+)(c)Lambda(-)(c) invariant mass distribution just above threshold. With an assumption of a resonance origin for the observed peak, a mass and width of M = [4634(-7)(+8)(stat)(-8)(+5)(syst)] MeV/c(2) and Gamma(tot) = [92(-24)(+40)(stat)(-21)(+10)(syst)] MeV are determined. The analysis is based on a study of events with initial-state-radiation photons in a data sample collected with the Belle detector at the Upsilon(4S) resonance and nearby continuum with an integrated luminosity of 695 fb(-1) at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevLett.101.172001

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  • Study of the suppressed B meson decay B--&gt; DK-, D -&gt; K+pi(-) 査読

    Y. Horii, K. Trabelsi, H. Yamamoto, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, V. Balagura, E. Barberio, I. Bedny, K. Belous, V. Bhardwaj, U. Bitenc, S. Blyth, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I.-S. Cho, S.-K. Choi, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, N. Gabyshev, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W.-S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, C. C. Kuo, Y. Kuroki, A. Kuzmin, Y.-J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, S.-W. Lin, C. Liu, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, Y. Nagasaka, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J.-G. Shiu, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Suzuki, F. Takasaki, N. Tamura, M. Tanaka, Y. Teramoto, T. Tsuboyama, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M.-Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   78 ( 7 )   071901-1 - 071901-7   2008年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a study of the suppressed B meson decay B--&gt; DK- followed by D -&gt; K+pi(-), where D indicates a D-0 or (D)overbar(0) state. The two decay paths interfere and provide information on the CP-violating angle phi(3). We use a data sample containing 657x10(6) B(B)overbar pairs recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) storage ring. We do not find significant evidence for the mode B--&gt; DK-, D -&gt; K+pi(-), and set an upper limit of r(B)&lt; 0.19, where r(B) is the magnitude of the ratio of amplitudes vertical bar A(B--&gt;(D)K-0(-))/A(B--&gt;(DK-)-K-0)vertical bar. The decay B--&gt; D pi(-), D -&gt; K+pi(-) is also analyzed as a reference, for which we observe a signal with 6.6 sigma significance, and measure the charge asymmetry A(D pi) to be -0.02(-0.16)(+0.15)(stat)+/- 0.04(syst). In addition, the ratio B(B--&gt;(DK-)-K-0)/B(B--&gt; D-0 pi(-)) is measured to be [6.77 +/- 0.23(stat)+/- 0.30(syst)]x10(-2).

    DOI: 10.1103/PhysRevD.78.071901

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  • Observation of two resonancelike structures in the pi(+)chi(c1) mass distribution in exclusive (B)overbar(0)-&gt; K-pi(+)chi(c1) decays 査読

    R. Mizuk, R. Chistov, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, K. -F. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, A. Drutskoy, S. Eidelman, D. Epifanov, P. Goldenzweig, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, S. -W. Lin, C. Liu, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   78 ( 7 )   072004-1 - 072004-14   2008年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of two resonancelike structures in the pi(+)chi(c1) invariant mass distribution near 4.1 GeV/c(2) in exclusive (B)overbar(0)-&gt; K-pi(+)chi(c1) decays. From a Dalitz plot analysis in which the pi(+)chi(c1) mass structures are represented by Breit-Wigner resonance amplitudes, we determine masses and widths of: M-1=(4051 +/- 14(-41)(+20)) MeV/c(2), Gamma(1)=(82(-17-22)(+21+47)) MeV, M-2=(4248(-29-35)(+44+180)) MeV/c(2), and Gamma(2)=(177(-39-61)(+54+316)) MeV; and product branching fractions of B((B)overbar(0)-&gt; K(-)Z(1,2)(+))xB(Z(1,2)(+)-&gt;pi(+)chi(c1))=(3.0(-0.8-1.6)(+1.5+3.7))x10(-5) and (4.0(-0.9-0.5)(+2.3+19.7))x10(-5), respectively. Here the first uncertainty is statistical, the second is systematic. The significance of each of the pi(+)chi(c1) structures exceeds 5 sigma, including the systematic uncertainty from various fit models. This analysis is based on 657x10(6) B(B)overbar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.78.072004

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  • Observation of B±→ψ(2S)π± and search for direct CP violation 査読

    V. Bhardwaj, R. Kumar, J. B. Singh, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M. C. Chang, P. Chang, A. Chen, B. G. Cheon, R. Chistov, I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, P. Goldenzweig, B. Golob, H. Ha, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, J. S. Lee, S. W. Lin, C. Liu, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, Y. Nagasaka, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, C. C. Wang, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, Y. Yamashita, M. Yamauchi, C. C. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    Physical Review D - Particles, Fields, Gravitation and Cosmology   78 ( 5 )   2008年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We report the first observation of B±→ψ(2S)π±, a Cabibbo- and color-suppressed decay. This analysis is based on 657×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. The measured branching fraction is (2.44±0.22±0.20)×10-5 and the charge asymmetry is A=0.022±0.085±0.016. The ratio of the branching fractions B(B±→ψ(2S)π±)/B(B±→ψ(2S)K±)=(3. 99±0.36±0.17)% is also determined. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.78.051104

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  • Measurement of branching fractions, isospin, and CP-violating asymmetries for exclusive b -&gt; d gamma modes 査読

    N. Taniguchi, M. Nakao, S. Nishida, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, A. Bay, K. Belous, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, W. Dungel, S. Eidelman, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, C. Liu, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, K. Miyabayashi, Y. Miyazaki, G. R. Moloney, Y. Nagasaka, I. Nakamura, E. Nakano, H. Nakazawa, Z. Natkaniec, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, K. S. Park, L. S. Peak, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Sasao, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, N. Tamura, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   101 ( 11 )   111801-1 - 111801-6   2008年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report new measurements of the decays B+-&gt; rho(+)gamma, B-0 -&gt; rho(0)gamma, and B-0 -&gt; omega gamma using a data sample of 657 x 10(6) B meson pairs accumulated with the Belle detector at the KEKB e(+) e(-) collider. We measure branching fractions B(B+ -&gt; rho(+)gamma) = (8.7(-2.7-1.1)(+2.9+0.9)) x 10(-7), B(B-0 -&gt; rho(0)gamma) = (7.8(-1.6-1.0)(+1.7+0.9)) x 10(-7), and B(B-0 -&gt; omega gamma) = (4.0(-1.7)(+1.9)+/- 1.3) x 10(-7). We also report the isospin asymmetry Delta(rho gamma) = -0.48(-0.19-0.09)(+0.21+0.08) and the first measurement of the direct CP-violating asymmetry A(CP)(B+ -&gt; rho(+)gamma) = -0.11 +/- 0.32 +/- 0.09, where the first and second errors are statistical and systematic, respectively.

    DOI: 10.1103/PhysRevLett.101.111801

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  • Study of tau(-) -&gt; K*(0)(892)K(-)nu(tau) and tau(-) -&gt; eta X nu(tau) decays at Belle 査読

    Y. Usuki, K. Hayasaka, K. Inami, H. Kaji, Y. Miyazaki, T. Ohshima

    NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS   181-82   314 - 318   2008年9月

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:ELSEVIER SCIENCE BV  

    Based on a high-statistical data sample of 5 x 10(8) tau-pairs, accumulated with the Belle detector at the KEKB e(+)e(-) collider, we have carried out, precise measurements of Br(tau(-) -&gt; K*(0)(892)K(-)nu(tau)) = (1.78 +/- 0.01 +/- 0.10) x 10(-3) and of the basic parameters of the neutral K*(0)(892) meson as M(K*0) = (895.49 +/- 0.18 +/- 0.30) MeV/c(2) and Gamma(K*0) = (48.86 +/- 0.50 +/- 0.69) MeV. The branching fractions of several tau decays involving eta meson(s) (tau(-) -&gt; eta X nu(tau)) is also obtained with much better accuracies than from previous measurements, by carefully scrutinizing background (BG) contaminations. A comparisons are made with some theoretical calculations. (All results presented here are preliminary.)

    DOI: 10.1016/j.nuclphysbps.2008.09.057

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  • Observation of B-+/--&gt;psi(2S)pi(+/-) and search for direct CP violation 査読

    V. Bhardwaj, R. Kumar, J. B. Singh, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, P. Goldenzweig, B. Golob, H. Ha, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, S. -W. Lin, C. Liu, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, Y. Nagasaka, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Suzuki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, Y. Yamashita, M. Yamauchi, C. C. Zhang, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   78 ( 5 )   051104-1 - 051104-6   2008年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of B-+/- -&gt; psi(2S)pi(+/-), a Cabibbo- and color-suppressed decay. This analysis is based on 657 x 10(6) B (B) over bar B events collected at the Y(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. The measured branching fraction is (2.44 +/- 0.22 +/- 0.20) x 10(-5) and the charge asymmetry is A = 0.022 +/- 0.085 +/- 0.016. The ratio of the branching fractions B(B-+/- -&gt; psi(2S)pi(+/-))/B(B-+/- -&gt; psi(2S)K-+/-) = (3.99 +/- 0.36 +/- 0.17)% is also determined.

    DOI: 10.1103/PhysRevD.78.051104

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  • High-statistics measurement of neutral-pion pair production in two-photon collisions 査読

    S. Uehara, Y. Watanabe, I. Adachi, H. Aihara, K. Arinstein, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, V. Bhardwaj, U. Bitenc, A. Bondar, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. I. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, S. E. Lee, A. Limosani, S. -W. Lin, C. Liu, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, K. Miyabayashi, Y. Miyazaki, T. Mori, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, K. S. Park, L. S. Peak, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, S. Y. Suzuki, G. N. Taylor, Y. Teramoto, I. Tikhomirov, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, C. H. Wang, P. Wang, X. L. Wang, R. Wedd, E. Won, Y. Yamashita, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   78 ( 5 )   052004-1 - 052004-17   2008年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a high-statistics measurement of differential cross sections and the total cross section for the process gamma gamma -&gt; pi(0)pi(0) in the kinematic range 0.6 GeV &lt;= W &lt;= 4.0 GeV and vertical bar cos theta*vertical bar &lt;= 0.8, where W and theta* are the energy and pion scattering angle, respectively, in the gamma gamma center-of-mass system. Differential cross sections are fitted to obtain information on S, D(0), D(2), G(0), and G(2) waves. The G waves are important above W similar or equal to 1.6 GeV. The general behavior of partial waves is studied by fitting differential cross sections in a simple parametrization where amplitudes contain resonant contributions and smooth background. The D(2) wave is dominated by the f(2)(1270) meson whose parameters are consistent with the current world averages. The D(0) wave contains a f(2)(1270) component, whose fraction is fitted. For the S wave, the f(0)(980) parameters are found to be consistent with the values determined from our recent pi(+) pi(-) data. In addition to the f(0)(980), the S wave prefers to have another resonance-like contribution whose parameters are obtained.

    DOI: 10.1103/PhysRevD.78.052004

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  • Measurement of the moments of the photon energy spectrum in B→Xsγ decays and determination of |Vcb| and mb at Belle 査読

    C. Schwanda, P. Urquijo, E. Barberio, A. Limosani, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, M. C. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, Y. Kozakai, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, Y. Kuroki, A. Kuzmin, Y. J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, C. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schümann, R. Seidl, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. G. Shiu, B. Shwartz, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, Z. P. Zhang, A. Zupanc

    Physical Review D - Particles, Fields, Gravitation and Cosmology   78 ( 3 )   2008年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Using the previous Belle measurement of the inclusive photon energy in B→Xsγ decays, we determine the first and second moments of this spectrum for minimum photon energies in the B meson rest frame ranging from 1.8 to 2.3 GeV. Combining these measurements with recent Belle data on the lepton energy and hadronic mass moments in B→Xcℓν decays, we perform fits to theoretical expressions derived in the 1S and kinetic mass schemes and extract the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vcb, the b-quark mass, and other nonperturbative parameters. In the 1S scheme analysis we find |Vcb|=(41.56±0.68(fit)±0.08(τB))×10-3 and mb1S=(4.723±0.055)GeV. In the kinetic scheme, we obtain |Vcb|=(41.58±0.69(fit)±0.08(τB)±0.58(th))×10-3 and mbkin=(4.543±0.075)GeV. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.78.032016

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  • New search for tau -&gt; mu gamma and tau -&gt; e gamma decays at Belle 査読

    K. Hayasaka, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, M. -C. Chang, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, A. Go, B. Golob, H. Ha, J. Haba, K. Hara, T. Hara, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, Y. J. Kim, Y. Kozakai, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, G. R. Moloney, T. Mori, Y. Nagasaka, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICS LETTERS B   666 ( 1 )   16 - 22   2008年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We report on a search for the lepton flavor violating tau(-) -&gt; mu(-)gamma and tau(-) -&gt; e(-)gamma decays based on 535 fb(-1) of data accumulated at the Belle experiment. No signal is found and we set 90% confidence level upper limits on the branching ratios B(tau(-) -&gt; mu(-)gamma) &lt; 4.5 x 10(-8) and B(tau(-) -&gt; e(-)y) &lt; 1.2 x 10(-7). (c) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2008.06.056

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  • Measurement of azimuthal asymmetries in inclusive production of hadron pairs in e(+)e(-) annihilation at root s=10.58 GeV 査読

    R. Seidl, M. Grosse Perdekamp, A. Ogawa, I. Adachi, H. Aihara, S. Bahinipati, A. M. Bakich, W. Bartel, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, B. Golob, H. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, A. Ishikawa, Y. Iwasaki, D. H. Kah, H. Kaji, H. Kawai, T. Kawasaki, H. J. Kim, H. O. Kim, Y. I. Kim, Y. J. Kim, P. Krizan, R. Kumar, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, C. Liu, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, L. S. Peak, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, J. B. Singh, S. Stanic, M. Staric, T. Sumiyoshi, M. Tanaka, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   78 ( 3 )   032011-1 - 032011-24   2008年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The Collins effect connects transverse quark spin with a measurable azimuthal asymmetry in the yield of hadronic fragments around the quark&apos;s momentum vector. Using two different reconstruction methods we measure statistically significant azimuthal asymmetries for charged pion pairs in e(+)e(-) annihilation at center-of-mass energies of 10.52 GeV and 10.58 GeV, which can be attributed to the fragmentation of primordial quarks with transverse spin components. The measurement was performed using a data set of 547 fb(-1) collected by the Belle detector at KEKB improving the statistics of the previously published results by nearly a factor of 20.

    DOI: 10.1103/PhysRevD.78.032011

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  • Measurement of the moments of the photon energy spectrum in B -&gt; X-s gamma decays and determination of |V-cb| and m(b) at Belle 査読

    C. Schwanda, P. Urquijo, E. Barberio, A. Limosani, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Brancko, M. -C. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, Y. Kozakai, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. Kuroki, A. Kuzmin, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, C. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, R. Seidl, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. -G. Shiu, B. Shwartz, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, Z. P. Zhang, A. Zupanc

    PHYSICAL REVIEW D   78 ( 3 )   032016-1 - 032016-13   2008年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using the previous Belle measurement of the inclusive photon energy in B -&gt; X-s gamma decays, we determine the first and second moments of this spectrum for minimum photon energies in the B meson rest frame ranging from 1.8 to 2.3 GeV. Combining these measurements with recent Belle data on the lepton energy and hadronic mass moments in B -&gt; X-c center dot nu decays, we perform fits to theoretical expressions derived in the 1S and kinetic mass schemes and extract the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element V-cb, the b-quark mass, and other nonperturbative parameters. In the 1S scheme analysis we find |V-cb|=(41.56 +/- 0.68(fit)+/- 0.08(tau(B)))x10(-3) and m(b)(1S)=(4.723 +/- 0.055) GeV. In the kinetic scheme, we obtain |V-cb|=(41.58 +/- 0.69(fit)+/- 0.08(tau(B))+/- 0.58(th))x10(-3) and m(b)(kin)=(4.543 +/- 0.075) GeV.

    DOI: 10.1103/PhysRevD.78.032016

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  • Search for B+-&gt; D*(+)pi(0) decay 査読

    M. Iwabuchi, M. Nakao, I. Adachi, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, U. Bitenc, A. Bozek, M. Bracko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, M. Fujikawa, N. Gabyshev, H. Ha, J. Haba, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Horii, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, C. Liu, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, G. R. Moloney, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, C. Schwanda, A. Sekiya, K. Senyo, M. Shapkin, H. Shibuya, J. -G. Shiu, B. Shwartz, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, S. Suzuki, M. Tanaka, Y. Teramoto, I. Tikhomirov, K. Trabelsi, Y. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, J. Wicht, E. Won, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   101 ( 4 )   041601-1 - 041601-5   2008年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report on a search for the doubly Cabibbo suppressed decay B+ -&gt; D*(+) pi(0), based on a data sample of 657 X 106 B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We find no significant signal and set an upper limit of B(B+ -&gt; D*(+) pi(0)) &lt; 3. 6 X 10(-6) at the 90% confidence level. This limit can be used to constrain the ratio between suppressed and favored B -&gt; D*pi decay amplitudes, r &lt; 0.051, at the 90% confidence level.

    DOI: 10.1103/PhysRevLett.101.041601

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  • Measurement of masses of the Xi(c)(2645) and Xi(c)(2815) baryons and observation of Xi(c)(2980)-&gt;Xi(c)(2645)pi 査読

    T. Lesiak, I. Adachi, H. Aihara, K. Arinstein, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Belous, V. Bhardwaj, U. Bitenc, S. Blyth, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, C. C. Kuo, Y. -J. Kwon, S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, J. Li, S. -W. Lin, C. Liu, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, Y. Nagasaka, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, H. Palka, C. W. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. -G. Shiu, B. Shwartz, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   665 ( 1 )   9 - 15   2008年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We report a precise measurement of the masses of the Xi(c)(2645) and Xi(c)(2815) baryons using a data sample of 414 fb(-1) collected by the Belle Collaboration at the KEKB e(+)e(-) collider. The states Xi(c)(2645)(0,+) are observed in the Xi(+.0)(c)pi(-.+) decay modes, while the Xi(c)(2815)(0.+) are reconstructed in the Xi(c)(2645)(+.0)pi(-.+) decay modes. The following mass splittings are determined: m(Xi c(2645)+) - m(Xi c(2645)0) = (-0.1 +/- 0.3(stat) +/- 0.6(syst)) MeV/c(2) and m(Xi c(2815)+) - m(Xi c(2815)0) (-3.4 +/- 1.9(stat) +/- 0.9(syst)) MeV/c(2) with a much better precision than the current world averages. We also observe a new decay mode, Xi(c)(2980)(0.+) -&gt; Xi(c)(2645)(+.0)pi(-.+). (C) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2008.05.055

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  • Search for B(0)-&gt; J/psi phi decays 査読

    Y. Liu, K. Trabelsi, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, A. Bay, I. Bedny, K. Belous, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, N. Gabyshev, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, H. Ishino, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, D. H. Kah, S. U. Kataoka, N. Katayama, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, J. Li, A. Limosani, C. Liu, D. Liventsev, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, T. Nagamine, Y. Nagasaka, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. -G. Shiu, J. B. Singh, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, H. Yamamoto, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   78 ( 1 )   011106-1 - 011106-5   2008年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a search for the decay B(0) -&gt; J/psi phi, using a sample of 657 x 10(6) B (B) over bar pairs collected with the Belle detector at the Gamma(4S) resonance. No statistically significant signal is found and an upper limit for the branching fraction is determined to be B(B(0) -&gt; J/psi phi) &lt; 9.4 x 10(-7) at 90% confidence level.

    DOI: 10.1103/PhysRevD.78.011106

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  • Observation of B-0 -&gt; p(p)over-barK*(0) with a large K*(0) polarization 査読

    J. -H. Chen, M. -Z. Wang, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, P. Kapusta, N. Katayama, T. Kawasaki, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, P. Krokovny, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, C. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, M. Rozanska, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J. -G. Shiu, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, H. Yamamoto, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   100 ( 25 )   251801-1 - 251801-6   2008年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using a 492 fb(-1) data sample collected near the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider, we observe the decay B-0 --&gt; p (p) over barK*(0) with a branching fraction of (1.18(-0.25)(+0.29)(stat) +/- 0.11(syst)) x 10(-6). We study the decay dynamics of B-0 --&gt; p (p) over barK(0) and compare with B+ --&gt; p (p) over barK*(+). The K*(0) meson is found to be almost 100% polarized ( with a fraction of (101 +/- 13 +/- 3)% in the helicity zero state), while the K*(+) meson has a (32 +/- 17 +/- 9)% fraction in the helicity zero state. The direct CP asymmetries for B-0 --&gt; p (p) over barK*(0) and B+ --&gt; p (p) over barK*(+) are measured to be -0.08 +/- 0.20 +/- 0.02 and -0.01 +/- 0.19 +/- 0.02, respectively. In addition, we report improved measurements of the branching fractions B(B+ --&gt; p (p) over barK*(+)) = (3.38(-0.60)(+0.73) +/- 0.39) x 10(-6) and B(B-0 --&gt; p (p) over barK(0)) = (2.51(-0.29)(+0.35) +/- 0.21) x 10(-6), which supersede our previous measurements.

    DOI: 10.1103/PhysRevLett.100.251801

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  • Measurement of B(D-s(+)-&gt;mu(+)nu(mu)) 査読

    L. Widhalm, I. Adachi, H. Aihara, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, V. Bhardwaj, U. Bitenc, S. Blyth, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, P. Goldenzweig, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. Kuroki, A. Kuzmin, Y. -J. Kwon, J. Lee, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, C. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, R. Seidl, A. Sekiya, K. Senyo, M. Shapkin, H. Shibuya, J. -G. Shiu, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, Z. P. Zhang, V. Zhilich, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   100 ( 24 )   241801-1 - 241801-6   2008年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the branching fraction B(D-s(+)-&gt;mu(+)nu(mu)) using a 548 fb(-1) data sample collected by the Belle experiment at the KEKB e(+)e(-) collider. The D-s momentum is determined by reconstruction of the system recoiling against DK gamma X in events of the type e(+)e(-)-&gt;(DsDKX)-D-*, D-s(*)-&gt; D-s gamma, where X represents additional pions or photons from fragmentation. This full-reconstruction method provides high resolution in the neutrino momentum and thus good background separation, equivalent to that achieved by experiments at the tau-charm factories. We obtain the branching fraction B(D-s(+)-&gt;mu(+)nu(mu))=[6.44 +/- 0.76(stat)+/- 0.57(syst)]x10(-3), implying a D-s decay constant of f(Ds)=[275 +/- 16(stat)+/- 12(syst)] MeV.

    DOI: 10.1103/PhysRevLett.100.241801

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  • Search for lepton-flavor-violatingy tau -&gt; lV(0) decays at Belle 査読

    Y. Nishio, K. Inami, T. Ohshim, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Beious, U. Bitenc, S. Blyth, A. Bondar, M. Bracko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, T. Iijima, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, S. Korpar, Y. Kozakai, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. Kuroki, A. Kuzmin, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, O. Schneider, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, S. Villa, A. Vinokurova, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   664 ( 1-2 )   35 - 40   2008年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We have searched for neutrinoless tau lepton decays into l and V-0, where l stands for an electron or muon, and V-0 for a vector meson (phi, omega, K*(0), (K) over bar*(0) or rho(0)), using 543 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No excess of signal events over the expected background has been observed, and we set upper limits on the branching fractions in the range (5.9-18) x 10(-8) at the 90% confidence level. These upper limits are significantly more restrictive than our previous results for the l phi, lK*(0), l (K) over bar*(0) and l rho(0) modes. (C) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2008.05.012

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  • Improved search for D(0)-(D)over-bar(0) mixing using semileptonic decays at Belle 査読

    U. Bitenc, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, I. Bedny, K. Belous, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, D. H. Kah, H. Kaji, P. Kapusta, N. Katayama, T. Kawasaki, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, Y. Kozakai, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. Kuroki, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, C. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuermann, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. -G. Shiu, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, A. Zupanc

    PHYSICAL REVIEW D   77 ( 11 )   112003-1 - 112003-20   2008年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    A search for mixing in the neutral D meson system has been performed using semileptonic D(0) -&gt; K((*)-) e(+) nu and D(0) -&gt; K((*)-) mu(+) nu decays. Neutral D mesons from D(*+)-&gt; D(0)pi(+)(s) decays are used and the flavor at production is tagged by the charge of the slow pion. The measurement is performed using 492 fb(-1) of data recorded by the Belle detector. From the yield of right-sign and wrong-sign decays arising from nonmixed and mixed events, respectively, we measure the ratio of the time-integrated mixing rate to the unmixed rate to be R(M)=(1.3 +/- 2.2 +/- 2.0) x 10(-4). This corresponds to an upper limit of R(M) &lt; 6.1 x 10(-4) at the 90% C.L.

    DOI: 10.1103/PhysRevD.77.112003

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  • Production of new charmoniumlike states in e(+)e(-)-&gt; J/psi D(()*())(D)over-bar(()*()) at root s approximate to 10.6 GeV 査読

    P. Pakhlov, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Belous, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, B. Golob, H. Ha, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, T. Medvedeva, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, G. Pakhlova, H. Palka, C. W. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J. -G. Shiu, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   100 ( 20 )   202001-1 - 202001-5   2008年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a study of the processes e(+)e(-)-&gt; J/psi D(()*())(D) over bar (()*()). In J/psi D*(D) over bar (()*()) we observe a significant enhancement in the D*(D) over bar (()*()) invariant mass spectrum, which we interpret as a new charmoniumlike state and denote X(4160). The X(4160) parameters are M=(4156(-20)(+25)+/- 15) MeV/c(2) and Gamma=(139(-61)(+111)+/- 21) MeV. We also report a new measurement of the X(3940) mass and width: M=(3942(-6)(+7)+/- 6) MeV/c(2) and Gamma=(37(-15)(+26)+/- 8) MeV. The analysis is based on a 693 fb(-1) data sample recorded near the Upsilon(4S) resonance by the Belle detector at the KEKB asymmetric-energy collider.

    DOI: 10.1103/PhysRevLett.100.202001

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  • Search for resonant B-+/--&gt; K(+/-)h -&gt; K-+/-gamma gamma decays at Belle 査読

    J. Wicht, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, S. Eidelman, D. Epifanov, S. Fratina, A. Go, A. Gorisek, H. Ha, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, L. Hinz, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, M. Iwasaki, Y. Iwasaki, C. Jacoby, D. H. Kah, H. Kaji, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, F. J. Ronga, Y. Sakai, T. Schietinger, O. Schneider, J. Schuemann, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J. B. Singh, A. Somov, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsukamoto, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, Z. P. Zhang, V. Zhilich, A. Zupanc, N. Zwahlen

    PHYSICS LETTERS B   662 ( 4 )   323 - 329   2008年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    DOI: 10.1016/j.physletb.2008.03.029

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  • Measurements of time-dependent CP violation in B(0) -&gt; (2S)K(S)(0) decays 査読

    H. Sahoo, T. E. Browder, K. Trabelsi, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, M. -C. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, B. Golob, H. Ha, J. Haba, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, Y. Kozakai, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. Kuroki, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J. -G. Shiu, B. Shwartz, A. Somov, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, H. Yamamoto, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   77 ( 9 )   091103-1 - 091103-6   2008年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report improved measurements of time-dependent CP violation parameters for B(0)((B) over bar (0))-&gt; psi(2S)K(S)(0). This analysis is based on a data sample of 657 x 10(6) B (B) over bar pairs collected at the Gamma(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We fully reconstruct one neutral B meson in the psi(2S)K(S)(0) CP-eigenstate decay channel, and the flavor of the accompanying B meson is identified to be either B(0) or (B) over bar (0) from its decay products. CP violation parameters are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays S(psi(2S)KS)(0) = + 0.72 +/- 0.09 (stat) +/- 0.03 (syst), A(psi(2S)KS)(0) = + 0.04 +/- 0.07 (stat) +/- 0.05 (syst). These results are in agreement with results from measurements of B(0)-&gt; J/psi K(0).

    DOI: 10.1103/PhysRevD.77.091103

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  • Study of B -&gt; D(**)l nu with full reconstruction tagging 査読

    D. Liventsev, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, Y. Liu, F. Mandl, S. McOnie, T. Medvedeva, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. Shapkin, H. Shibuya, J. -G. Shiu, B. Shwartz, A. Sokolov, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Suzuki, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, Y. Yamashita, Z. P. Zhang, V. Zhilich, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   77 ( 9 )   091503-1 - 091503-7   2008年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a study of semileptonic B decays to P-wave D(**) mesons. Semileptonic decay to a D(2)(*) meson is observed for the first time and its product branching ratio is measured to be B(B(+)-&gt; (D) over bar (*0)(2)l(+)nu) x B((D) over bar (*0)(2)-&gt; D(-)pi(+)) = 0.22 +/- 0.03(stat.) +/- 0.04(syst.)%. The result is obtained using fully reconstructed B tags from a data sample that contains 657 x 10(6)B (B) over bar pairs collected at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.77.091503

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  • Measurement of CP asymmetries and branching fractions in a time-dependent Dalitz analysis of B0→(ρπ)0 and a constraint on the quark mixing angle 2 査読

    A. Kusaka, C. C. Wang, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, M. Bračko, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, N. Gabyshev, B. Golob, B. Golob, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, S. Korpar, P. Križan, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. W. Lin, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, C. W. Park, H. Park, L. S. Peak

    Physical Review D   77 ( 7 )   072001   2008年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We present the results of a time-dependent Dalitz plot analysis of B0→π+π-π0 decays based on a 414fb-1 data sample that contains 449×106BB̄ pairs. The data were collected on the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the quark mixing angle 2, 68°&lt; 2&lt;95° at the 68.3% confidence level for the 2 solution consistent with the standard model. A large standard-model-disfavored region also remains. The branching fractions for the decay processes B0→ρ±(770)π and B0→ρ0(770)π0 are measured to be (22.6±1.1[stat]±4.4[syst])×10-6 and (3.0±0.5[stat] ±0.7[syst])×10-6, respectively. These are the first branching fraction measurements of the process B0→ρ(770)π with the lowest resonance ρ(770) explicitly separated from the radial excitations. © 2008 The American Physical Society.

    DOI: 10.1103/PhysRevD.77.072001

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  • Observation of a resonancelike structure in the pi(+-)psi &apos; mass distribution in exclusive B -&gt; K pi(+-)psi &apos; decays 査読

    S. -K. Choi, S. L. Olsen, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, I. Bedny, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, N. Gabyshev, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, M. Shapkin, C. P. Shen, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. Vervink, S. Villa, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   100 ( 14 )   142001-1 - 142001-6   2008年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    A distinct peak is observed in the pi(+/-)psi&apos; invariant mass distribution near 4.43 GeV in B -&gt; K pi(+/-)psi&apos; decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433 +/- 4(stat)+/- 2(syst) MeV and Gamma=45(-13)(+18)(stat)(-13)(+30)(syst) MeV. The product branching fraction is determined to be B(B(0)-&gt; K(-/+)Z(+/-)(4430))xB(Z(+/-)(4430)-&gt;pi(+/-)psi&apos;)=(4.1 +/- 1.0(stat)+/- 1.4(syst))x10(-5), where Z(+/-)(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5 sigma. These results are obtained from a 605 fb(-1) data sample that contains 657x10(6) B (B) over bar pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevLett.100.142001

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  • Measurement of the ratio B(D-0 -&gt;pi(+)pi(-)pi(0))/B(D-0 -&gt; K-pi(+)pi(0)) and the time-integrated CP asymmetry in D-0 -&gt;pi(+)pi(-)pi(0) 査読

    K. Arinstein, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, V. Bhardwaj, U. Bitenc, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, Y. Kozakai, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. Kuroki, A. Kuzmin, Y. -J. Kwon, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, C. Liu, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, J. Schfimann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, H. Yamamoto, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   662 ( 2 )   102 - 110   2008年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We report a high-statistics measurement of the relative branching fraction B(D-0 --&gt; pi(+)pi(-)pi(0))/B(D-0 --&gt; K-pi(+)pi(0)) using a 532 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured value of the relative branching fraction is B(D-0 --&gt; pi(+)pi-(7)pi(0))/B(D-0 --&gt; K-pi(+)pi(0)) = (10.12 +/- 0.04(stat) +/- 0.18(syst)) x 10(-2), which has an accuracy comparable to the world average. We also present a measurement of the time-integrated CP asymmetry in D-0 pi(+)pi(-)pi(0) decay. The result, A(CP) = (0.43 +/- 1.30)%, shows no significant CP violation. (C) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2008.02.054

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  • Measurement of CP asymmetries and branching fractions in a time-dependent Dalitz analysis of B-0 -&gt;(rho pi)(0) and a constraint on the quark mixing angle phi(2) 査読

    A. Kusaka, C. C. Wang, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, N. Gabyshev, B. Golob, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, Y. Yamashita, Z. P. Zhang, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   77 ( 7 )   072001-1 - 072001-25   2008年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present the results of a time-dependent Dalitz plot analysis of B-0 -&gt;pi(+)pi(-)pi(0) decays based on a 414 fb(-1) data sample that contains 449x10(6)B (B) over bar pairs. The data were collected on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the quark mixing angle phi(2), 68 degrees &lt;phi(2)&lt; 95 degrees at the 68.3% confidence level for the phi(2) solution consistent with the standard model. A large standard-model-disfavored region also remains. The branching fractions for the decay processes B-0 -&gt;rho(+/-)(770)pi(-/+) and B-0 -&gt;rho(0)(770)pi(0) are measured to be (22.6 +/- 1.1[stat]+/- 4.4[syst])x10(-6) and (3.0 +/- 0.5[stat]+/- 0.7[syst])x10(-6), respectively. These are the first branching fraction measurements of the process B-0 -&gt;rho(770)pi with the lowest resonance rho(770) explicitly separated from the radial excitations.

    DOI: 10.1103/PhysRevD.77.072001

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  • Difference in direct charge-parity violation between charged and neutral B meson decays 査読

    S. -W. Lin, Y. Unno, W. -S. Hou, P. Chang, I. Adachi, H. Aihara, K. Akai, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, C. -C. Chiang, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, M. Fujikawa, K. Furukawa, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, S. U. Kataoka, H. Kawai, T. Kawasaki, A. Kibayashi, H. Kichimi, E. Kikutani, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, Y. Kozakai, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, Y. Liu, D. Liventsev, F. Mandl, D. Marlow, S. McOnie, T. Medvedeva, T. Mimashi, W. Mitaroff, K. Miyabayashi, H. Miyake, Y. Miyazaki, R. Mizuk, T. Mori, T. T. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, Y. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, M. Peters, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, T. Shidara, S. Shinomiya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, N. Tamura, M. Tanaka, M. Tawada, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, M. Yoshida, C. Z. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    NATURE   452 ( 7185 )   332 - U3   2008年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:NATURE PUBLISHING GROUP  

    Equal amounts of matter and antimatter are predicted to have been produced in the Big Bang, but our observable Universe is clearly matter- dominated. One of the prerequisites(1) for understanding this elimination of antimatter is the nonconservation of charge- parity ( CP) symmetry. So far, two types of CP violation have been observed in the neutral K meson ( K-0) and B meson ( B-0) systems: CP violation involving the mixing(2) between K-0 and its antiparticle (K) over bar (0) ( and likewise(3,4) for B-0 and (B) over bar (0)), and direct CP violation in the decay of each meson(5-8). The observed effects for both types of CP violation are substantially larger for the B-0 meson system. However, they are still consistent with the standard model of particle physics, which has a unique source(9) of CP violation that is known to be too small(10) to account for the matter-dominated Universe. Here we report that the direct CP violation in charged B-+/- --&gt; K-+/- pi(0) decay is different from that in the neutral B-0 counterpart. The direct CP- violating decay rate asymmetry, A(K)+/- (pi 0) ( that is, the difference between the number of observed B- --&gt; K- pi(0) event versus B+ --&gt; K+ pi(0) events, normalized to the sum of these events) is measured to be about +7%, with an uncertainty that is reduced by a factor of 1.7 from a previous measurement(7). However, the asymmetry A(K+/-) p(-/+) for B-0 --&gt; K- pi(+) versus B-0 --&gt; K+ pi(-) is at the -10% level(7,8). Although it is susceptible to strong interaction effects that need further clarification, this large deviation in direct CP violation between charged and neutral B meson decays could be an indication of new sources of CP violation - which would help to explain the dominance of matter in the Universe.

    DOI: 10.1038/nature06827

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  • Measurement of time-dependent CP-violating parameters in B(0)-&gt; K(S)(0)K(S)(0) decays 査読

    Y. Nakahama, K. Sumisawa, I. Adachi, H. Aihara, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hara, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. Lee, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, O. Tajima, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, Y. Yamashita, Y. Yusa, Z. P. Zhang, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   100 ( 12 )   121601-1 - 121601-5   2008年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the CP-violating parameters in B(0)-&gt; K(S)(0)K(S)(0) decays based on a data sample of 657x10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. In this Letter, one neutral B meson is fully reconstructed in the B(0)-&gt; K(S)(0)K(S)(0) decay mode, and the flavor of the accompanying B meson is identified by its decay products. The CP-violating parameters are measured from the asymmetry in the distributions of the proper-time interval between the two B decays: S(KS)(0)K(S)(0)=-0.38(-0.77)(+0.69)(stat)+/- 0.09(syst) and A(KS)(0)K(S)(0)=-0.38 +/- 0.38(stat)+/- 0.05(syst).

    DOI: 10.1103/PhysRevLett.100.121601

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  • Observation of anomalous Y(1S)pi(+)pi(-) and Y(2S)pi(+)pi(-) production near the Y(5S) resonance 査読

    K. -F. Chen, W. -S. Hou, M. Shapkin, A. Sokolov, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, A. Bay, K. Belous, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, R. Chistov, Y. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. S. Lange, J. S. Lee, M. J. Lee, T. Lesiak, A. Limosani, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, C. P. Shen, H. Shibuya, J. -G. Shiu, B. Shwartz, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. Vervink, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, A. Zupanc

    PHYSICAL REVIEW LETTERS   100 ( 11 )   112001-1 - 112001-6   2008年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of e(+)e(-) -&gt; Y(1S)pi(+)pi(-), Upsilon(2S)pi(+)pi(-), and first evidence for e(+)e(-) -&gt; Y(3S)pi(+)pi(-), Y(1S)K(+)K(-), near the peak of the Y(5S) resonance at root s similar to 10.87 GeV. The results are based on a data sample of 21.7 fb(-1) collected with the Belle detector at the KEKB e(+)e(-) collider. Attributing the signals to the Upsilon(5S) resonance, the partial widths Gamma(Y(5S) -&gt; Y(1S)pi(+)pi(-)) = 0.59 +/- 0.04(stat)+/- 0.09(syst) MeV and Gamma(Y(5S) -&gt; Y(2S)pi(+)pi(-)) = 0.85 +/- 0.07(stat)+/- 0.16(syst) MeV are obtained from the observed cross sections. These values exceed by more than 2 orders of magnitude the previously measured partial widths for dipion transitions between lower Y resonances.

    DOI: 10.1103/PhysRevLett.100.112001

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  • Observation of a new D-sJ meson in B+-&gt;(D)over-bar(0)D(0)K(+) decays 査読

    J. Brodzicka, H. Palka, I. Adachi, H. Aihara, V. Aulchenko, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, U. Bitenc, A. Bondar, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, W. T. Chen, B. G. Cheon, C. -C. Chiang, R. Chistov, I. -S. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, A. Go, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, R. Pestotnik, L. E. Pilionen, M. Rozanska, Y. Sakai, O. Schneider, R. Seidl, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J. -G. Shiu, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, N. Zwahlen

    PHYSICAL REVIEW LETTERS   100 ( 9 )   092001-1 - 092001-6   2008年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the observation of a new D-sJ meson produced in B+-&gt;(D) over bar D-0(sJ)-&gt;(D) over bar (DK+)-D-0-K-0. This state has a mass of M=2708 +/- 9(-10)(+11) MeV/c(2), a width Gamma=108 +/- 23(-31)(+36) MeV/c(2) and a 1(-) spin-parity. The statistical significance of this observation is 8.4 sigma. The results are based on an analysis of 449x10(6) B (B) over bar events collected at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevLett.100.092001

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  • Observation of B(S)(0)-&gt;phi gamma and search for B(S)(0)-&gt;gamma gamma decays at Belle 査読

    J. Wicht, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, A. Bay, K. Belous, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, P. Goldenzweig, B. Golob, J. Haba, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. S. Lange, J. Lee, J. S. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, O. Schneider, J. Schuemann, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Somov, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, T. Tsuboyama, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, Y. Usov, G. Varner, K. Vervink, S. Villa, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, Y. Yusa, Z. P. Zhang, V. Zhilich, A. Zupanc, N. Zwahlen

    PHYSICAL REVIEW LETTERS   100 ( 12 )   121801-1 - 121801-6   2008年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We search for the radiative penguin decays B(s)(0)-&gt;phi gamma and B(s)(0)-&gt;gamma gamma in a 23.6 fb(-1) data sample collected at the Upsilon(5S) resonance with the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider. We observe for the first time a radiative penguin decay of the B(s)(0) meson in the B(s)(0)-&gt;phi gamma mode and we measure B(B(s)(0)-&gt;phi gamma)=(57(-15)(+18)(stat)(-11)(+12)(syst))x10(-6). No significant B(s)(0)-&gt;gamma gamma signal is observed and we set a 90% confidence level upper limit of B(B(s)(0)-&gt;gamma gamma)&lt; 8.7x10(-6).

    DOI: 10.1103/PhysRevLett.100.121801

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  • Search for (B)over-bar(0)-&gt;Lambda(+)(c)(Lambda)over-bar(c)(-) decay at Belle 査読

    Y. Uchida, H. Ozaki, H. Kichimi, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Ikado, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, O. Schneider, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   77 ( 5 )   051101-1 - 051101-6   2008年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We search for the doubly charmed baryonic decay (B) over bar (0) Lambda(+)(c)(Lambda) over bar (-)(c), in a data sample of 520 x 10(6) B (B) over bar events accumulated at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. We find no significant signal and set an upper limit of B((B) over bar (0) -&gt; Lambda(+)(c)(Lambda) over bar (-)(c)) &lt; 6.2 x 10(-5) at 90% confidence level. The result is significantly below a naive extrapolation from B B(&lt;(B)over bar&gt; -&gt; Xi(0)(c)(Lambda) over bar (-)(c) assuming a simple Cabibbo-suppression factor of vertical bar V(cd)/V(cs)vertical bar(2). The small branching fraction may be attributed to a suppression due to the large momentum of the baryonic decay products, which has been observed in other charmed baryonic two-body B decays.

    DOI: 10.1103/PhysRevD.77.051101

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  • Observation of the psi(4415) -&gt; D(D)over-bar(2)(*)(2460) decay using initial-state radiation 査読

    G. Pakhlova, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Belous, U. Bitenc, A. Bondar, M. Bracko, J. Brodzicka, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, C. -C. Chiang, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, T. Kawasaki, A. Kibayashi, H. Kichimi, H. J. Kim, H. O. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, D. Liventsev, F. Mandl, D. Marlow, S. McOnie, T. Medvedeva, H. Miyake, R. Mizuk, D. Mohapatra, G. R. Moloney, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. Shapkin, C. P. Shen, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Somov, S. Stanic, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, A. Vinokurova, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. Z. Yuan, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   100 ( 6 )   062001-1 - 062001-6   2008年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurements of the exclusive cross section for e(+)e(-)-&gt; D(0)D(-)pi(+) over the center-of-mass energy range 4.0 GeV to 5.0 GeV with initial-state radiation and the first observation of the decay psi(4415)-&gt; D(0)D(-)pi(+). From a study of the resonant substructure in psi(4415) decay we conclude that the psi(4415)-&gt; D(0)D(-)pi(+) decay is dominated by psi(4415)-&gt; D (D) over bar (*)(2)(2460). We obtain B(psi(4415)-&gt; D(0)D(-)pi(+)(nonresonant))/B(psi(4415)-&gt; D (D) over bar (*)(2)(2460)-&gt; D(0)D(-)pi(+))&lt; 0.22 at 90% C.L. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 673 fb(-1).

    DOI: 10.1103/PhysRevLett.100.062001

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  • Search for lepton flavor violating tau decays into three leptons 査読

    Y. Miyazaki, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakichi, V. Balagura, E. Barberio, A. Bay, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, H. Ha, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Hefferman, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, Y. Kozakai, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, G. R. Moloney, T. Mori, T. Nagamine, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. -G. Shiu, B. Shwartz, A. Sokolov, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, A. Vinokurova, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, Y. Yamashita, Z. P. Zhang, V. Zhilich, A. Zupanc, O. Zyukova

    PHYSICS LETTERS B   660 ( 3 )   154 - 160   2008年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We search for lepton flavor violating tau decays into three leptons (electron or muon) using 535 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No evidence for these decays is observed, and we set 90% confidence level upper limits on the branching fractions of (2.0-4.1) x 10(-8). These results improve upon our previously published upper limits by factors of 4.9 to 10. (C) 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.12.046

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  • Observation of D(s1)(2536)(+) -&gt; D(+)pi(-)K(+) and angular decomposition of D(s1)(2536)(+)-&gt; D*(+)K(S)(0) 査読

    V. Balagura, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Danilov, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, B. Golob, H. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, O. Schneider, K. Senyo, M. Shapkin, C. P. Shen, H. Shibuya, J. -G. Shiu, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   77 ( 3 )   032001-1 - 032001-10   2008年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using 462 fb(-1) of e(+)e(-) annihilation data recorded by the Belle detector, we report the first observation of the decay D(s1)(2536)(+)-&gt; D(+)pi(-)K(+). The ratio of branching fractions B(D(s1)(2536)(+)-&gt; D(+)pi(-)K(+))/B(D(s1)(2536)(+)-&gt; D*(+)K(0)) is measured to be (3.27 +/- 0.18 +/- 0.37)%. We also study the angular distributions in the D(s1)(2536)(+)-&gt; D*(+)K(S)(0) decay and measure the ratio of D- and S-wave amplitudes. The S-wave dominates, with a partial width of Gamma(S)/Gamma(total)=0.72 +/- 0.05 +/- 0.01.

    DOI: 10.1103/PhysRevD.77.032001

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  • Time-dependent CP-violating asymmetry in B(0)-&gt;rho(0)gamma decays 査読

    Y. Ushiroda, K. Sumisawa, N. Taniguchi, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I.-S. Cho, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, D. Epifanov, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hara, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, S.-W. Lin, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, Y. Nagasaka, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlov, C. W. Park, H. Park, L. S. Peak, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J.-G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Stanic, T. Sumiyoshi, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW LETTERS   100 ( 2 )   021602-1 - 021602-5   2008年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first measurement of CP-violation parameters in B(0)-&gt;rho(0)gamma decays based on a data sample of 657x10(6)B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We obtain the time-dependent and direct CP-violating parameters, S(rho)(0)gamma=-0.83 +/- 0.65(stat)+/- 0.18(syst) and A(rho)(0)gamma=-0.44 +/- 0.49(stat)+/- 0.14(syst), respectively.

    DOI: 10.1103/PhysRevLett.100.021602

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  • Study of charmonia in four-meson final states produced in two-photon collisions 査読

    S. Uehara, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, I. -S. Cho, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, G. Gokhroo, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    EUROPEAN PHYSICAL JOURNAL C   53 ( 1 )   1 - 14   2008年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:SPRINGER  

    We report measurements of charmonia produced in two-photon collisions and decaying to four-meson final states, where the meson is either a charged pion or a charged kaon. The analysis is based on a 395 fb(-1) data sample accumulated with the Belle detector at the KEKB electron-positron collider. We observe signals for the three C-even charmonia eta(c)(1S), chi(c0)(1P) and chi(c2)(1P) in the pi(+) pi(-) pi(+) pi(-), K+ K- pi(+) pi(-) and K+ K- K+ K- decay modes. No clear signals for eta(c)(2S) production are found in these decay modes. We have also studied resonant structures in charmonium decays to two-body intermediate meson resonances. We report the products of the two-photon decay width and the branching fractions, Gamma B-gamma gamma, for each of the charmonium decay modes.

    DOI: 10.1140/epjc/s10052-007-0451-z

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  • Study of the decay mechanism for B+ -&gt; p(p)over-barK(+) and B+ -&gt; p(p)over-bar pi(+) 査読

    J. -T. Wei, M. -Z. Wang, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Brako, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, Y. K. Choi, S. Cole, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, B. Golob, H. Hap, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, Y. Liu, D. Liventsev, E. Mandl, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. -G. Shiu, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, K. Vervink, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICS LETTERS B   659 ( 1-2 )   80 - 86   2008年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We study the characteristics of the low mass p (p) over bar enhancements near threshold in the three-body decays B+ -&gt; p (p) over barK(+) and B+ -&gt; p (p) over bar pi(+). We observe that the proton polar angle distributions in the p (p) over bar helicity frame in the two decays have the opposite polarity, and measure the forward-backward asymmetries as a function of the p mass for the p (p) over barK(+) mode. We also search for the intermediate two-body decays, B+ -&gt; (p) over bar Delta(++) and B+ -&gt; p (Delta) over bar (0), and set upper limits on their branching fractions. These results are obtained from a 414 fb(-1) data sample that contains 449 x 10(6) B (B) over bar events collected near the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. (c) 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.11.063

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  • Measurement of the near-threshold e(+)e(-)-&gt; D(D)over-bar cross section using initial-state radiation 査読

    G. Pakhlova, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, A. Bay, I. Bedny, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, B. Golob, K. Hayasaka, H. Hayashii, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, A. Kibayashi, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lange, J. S. Lee, M. J. Lee, T. Lesiak, A. Limosani, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, C. W. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, A. J. Schwartz, R. Seidl, K. Senyo, M. Shapkin, V. Shebalin, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, B. D. Yabsley, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   77 ( 1 )   011103-1 - 011103-5   2008年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurements of the exclusive cross section for e(+)e(-)-&gt; D (D) over bar, where D=D(0) or D(+), in the center-of-mass energy range from the D (D) over bar threshold to 5 GeV with initial-state radiation. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 673 fb(-1).

    DOI: 10.1103/PhysRevD.77.011103

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  • Observation of e(+)e(-)-&gt; K(+)K(-)J/psi via initial-state radiation at Belle 査読

    C. Z. Yuan, C. P. Shen, P. Wang, X. L. Wang, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, U. Bitenc, A. Bondar, M. Bracko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Danilov, A. Das, M. Dash, S. Eidelman, D. Epifanov, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W. -S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, Y. Nagasaka, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   77 ( 1 )   011105-1 - 011105-6   2008年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The process e(+)e(-)-&gt; K(+)K(-)J/psi is observed for the first time via initial-state radiation. The cross section of e(+)e(-)-&gt; K(+)K(-)J/psi for center-of-mass energies between threshold and 6.0 GeV is measured using 673 fb(-1) of data collected with the Belle detector on and off the Upsilon(4S) resonance. No significant signal for Y(4260)-&gt; K(+)K(-)J/psi is observed, and we determine B(Y(4260)-&gt; K(+)K(-)J/psi)Gamma(Y(4260)-&gt; e(+)e(-))&lt; 1.2 eV/c(2) at a 90% confidence level. We also find evidence for e(+)e(-)-&gt; K(S)(0)K(S)(0)J/psi in the same data sample.

    DOI: 10.1103/PhysRevD.77.011105

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  • Search for Lepton Flavor Violation in the Decays tau to e gamma and tau to mu gamma 査読

    K. Hayasaka, H. Kaji, al

    Phys. Lett. B   666   16   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Measurement of the e(+)e(-) -&gt; pi(+)pi(-)J/psi cross section via initial-state radiation at Belle 査読

    C. Z. Yuan, C. P. Shen, P. Wang, S. McOnie, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, S. Bahinipati, V. Balagura, E. Barberio, I. Bedny, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, S. Fratina, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, S. E. Lee, T. Lesiak, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, D. Marlow, A. Matyja, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, Y. Nagasaka, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, L. S. Peak, L. E. Piilonen, Y. Sakai, O. Schneider, J. Schuemann, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, M. Staric, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, X. L. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   99 ( 18 )   182004-1 - 182004-6   2007年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The cross section for e(+)e(-)-&gt;pi(+)pi(-)J/psi between 3.8 and 5.5 GeV/c(2) is measured using a 548 fb(-1) data sample collected on or near the Upsilon(4S) resonance with the Belle detector at KEKB. A peak near 4.25 GeV/c(2), corresponding to the so called Y(4260), is observed. In addition, there is another cluster of events at around 4.05 GeV/c(2). A fit using two interfering Breit-Wigner shapes describes the data better than one that uses only the Y(4260), especially for the lower-mass side of the 4.25 GeV enhancement.

    DOI: 10.1103/PhysRevLett.99.182004

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  • Search for B -&gt; h((*))nu(nu)over-bar decays at Belle 査読

    K. -F. Chen, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, P. Chang, Y. Chao, A. Chen, B. G. Cheon, C. -C. Chiang, I. -S. Cho, Y. Choi, Y. K. Choi, S. Cole, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, S. Kajiwara, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, D. Marlow, A. Matyja, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, I. Nakamura, M. Nakao, S. Nishida, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, S. Shinomiya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, O. Tajima, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   99 ( 22 )   221802-1 - 221802-5   2007年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a search for the rare decays B -&gt; h((*))nu(nu) over bar, where h((*)) stands for a light meson. A data sample of 535x10(6) B (B) over bar pairs collected with the Belle detector at the KEKB e(+)e(-) collider is used. Signal candidates are required to have an accompanying B meson fully reconstructed in a hadronic mode and signal side particles consistent with a single h((*)) meson. No significant signal is observed and we set upper limits on the branching fractions at 90% confidence level. The limits on B-0 -&gt; K-*0 nu(nu) over bar and B+-&gt; K+nu(nu) over bar decays are more stringent than the previous constraints, while the first searches for B-0 -&gt; K-0 nu(nu) over bar, pi(0)nu(nu) over bar, rho(0)nu(nu) over bar, phi nu(nu) over bar and B+-&gt; K*+nu(nu) over bar, rho(+)nu(nu) over bar are reported.

    DOI: 10.1103/PhysRevLett.99.221802

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  • Search for the CP-Violating Decays Upsilon(4S)-&gt;(BB0)-B-0 -&gt; J/psi K-S(0)+J/psi(eta(c))K-S(0) 査読

    O. Tajima, M. Hazumi, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, V. Bhardwaj, U. Bitenc, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, C. -C. Chiang, R. Chistov, I. -S. Cho, Y. Choi, Y. K. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, A. Go, G. Gokhroo, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, D. Heffernan, T. Hokuue, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, J. H. Kang, S. U. Kataoka, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, S. -W. Lin, D. Liventsev, F. Mandl, D. Marlow, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, M. -Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   99 ( 21 )   211601-1 - 211601-5   2007年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first search for CP-violating decays of the Y(4S) using a data sample that contains 535 x 10(6) Y(4S) mesons with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. A partial reconstruction technique is employed to enhance the signal sensitivity. No significant signals were observed. We obtain an upper limit of 4 x 10(-7) at the 90% confidence level for the branching fractions of the CP violating modes, Y(4S) -&gt; B-0(B) over bar (0) -&gt; J/psi K-S(0) + J/psi(eta K-c)(S)0. Extrapolating the result, we find that an observation with 5 sigma significance is expected with a 30 ab(-1) data sample, which is within the reach of a future super B factory.

    DOI: 10.1103/PhysRevLett.99.211601

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  • Observation of B-0 -&gt; D*-tau(+)nu(tau) decay at belle 査読

    A. Matyja, M. Rozanska, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, K. -F. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, S. Eidelman, S. Fratina, N. Gabyshev, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, H. Kaji, S. Kajiwara, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, Y. Kozakai, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. S. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, Y. Nagasaka, I. Nakamura, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, O. Schneider, J. Schumann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, S. Shinomiya, J. -G. Shiu, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, K. Sumisawa, T. Sumiyoshi, O. Tajima, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. C. Wang, C. H. Wang, P. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, A. Zupanc

    PHYSICAL REVIEW LETTERS   99 ( 19 )   191807-1 - 191807-5   2007年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report an observation of the decay B-0 -&gt; D*-tau(+)nu(tau) in a data sample containing 535x10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We find a signal with a significance of 5.2 sigma and measure the branching fraction B(B-0 -&gt; D*-tau(+)nu(tau))=(2.02(-0.37)(+0.40)(stat)+/- 0.37(syst))%. This is the first observation of an exclusive B decay with a b -&gt; c tau nu(tau) transition.

    DOI: 10.1103/PhysRevLett.99.191807

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  • Observation of two resonant structures in e(+)e(-)-&gt;pi(+)pi(-)psi(2S) via initial-state radiation at Belle 査読

    X. L. Wang, C. Z. Yuan, C. P. Shen, P. Wang, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, I. Bedny, V. Bhardwaj, U. Bitenc, S. Blyth, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, A. Chen, K.-F. Chen, B. G. Cheon, C.-C. Chiang, R. Chistov, I.-S. Cho, S.-K. Choi, Y. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, A. Go, G. Gokhroo, H. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W.-S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, A. Sekiya, M. E. Sevior, M. Shapkin, H. Shibuya, J.-G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   99 ( 14 )   142002-1 - 142002-5   2007年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The cross section for e(+)e(-)-&gt;pi(+)pi(-)psi(2S) between threshold and root s=5.5 GeV is measured using 673 fb(-1) of data on and off the Upsilon(4S) resonance collected with the Belle detector at KEKB. Two resonant structures are observed in the pi(+)pi(-)psi(2S) invariant-mass distribution, one at 4361 +/- 9 +/- 9 MeV/c(2) with a width of 74 +/- 15 +/- 10 MeV/c(2), and another at 4664 +/- 11 +/- 5 MeV/c(2) with a width of 48 +/- 15 +/- 3 MeV/c(2), if the mass spectrum is parametrized with the coherent sum of two Breit-Wigner functions. These values do not match those of any of the known charmonium states.

    DOI: 10.1103/PhysRevLett.99.142002

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  • Study of tau(-) -&gt; K-s pi(-) upsilon(tau) decay at Belle 査読

    D. Epifanov, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, K.-E Chen, W. T. Chen, B. G. Cheon, C.-C. Chiang, R. Chistov, I.-S. Cho, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, G. Gokhroo, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y-J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, Y. Liu, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICS LETTERS B   654 ( 3-4 )   65 - 73   2007年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We present a study of the decay tau(-) -&gt; K-S,pi(-) nu(tau) using a 351 fb(-1) data sample collected with the Belle detector. The analysis is based on 53. 110 lepton-tagged signal events. The measured branching fraction Beta(tau(-) -&gt; K-s pi(-)nu(tau)) = (0.404 +/- 0.002(stat.) +/- 0.013(syst.))% is consistent with the world average value and has better accuracy. An analysis of the K-S pi(-) invariant mass spectrum reveals contributions from the K*(892)(-)as well as other states. For the first time the K*(892)(-) mass and width have been measured in tau decay: M(K*(892)(-)) = (895.47 +/- 0.20(stat.) +/- 0.44(syst.) +/- 0.59(mod.)) MeV/c(2), Gamma(K*(892)(-)) = (46.2 +/- 0.6(stat.) +/- 1.0(syst.) +/- 0.7(mod.)) MeV. The K*(892)(-) mass is significantly different from the current world average value. (C) 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.08.045

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  • Measurement of branching fraction and time-dependent CP asymmetry parameters in B-0 -&gt;(D*+D*-KS0) decays 査読

    J. Dalseno, I. Adachi, H. Aihara, T. Aushev, A. M. Bakich, V. Balagura, A. Bay, U. Bitenc, I. Bizjak, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, Y. K. Choi, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, A. Go, H. Ha, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, G. R. Moloney, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, R. Seidl, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   76 ( 7 )   072004-1 - 072004-9   2007年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the branching fraction and time-dependent CP violation parameters for B-0 -&gt;(D*+D*-KS0) decays. These results are obtained from a 414 fb(-1) data sample that contains 449x10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We obtain the branching fraction, B(B-0 -&gt;(D*+D*-KS0))=[3.4 +/- 0.4(stat)+/- 0.7(syst)]x10(-3), which is in agreement with the current world average. We also obtain an upper limit on the product branching fraction for a possible two-body decay, B(B-0 -&gt; D-s1(+)(2536)D*-)B(D-s1(+)(2536)-&gt;(D*+KS0))&lt; 7.1x10(-4) (90% CL). In the traditional 2-parameter time-dependent CP analysis, we measure the CP violation parameters, A(CP)=-0.01(-0.28)(+0.28)(stat)+/- 0.09(syst), Dsin2 phi(1)=0.06(-0.44)(+0.45)(stat)+/- 0.06(syst). No evidence for either mixing-induced or direct CP violation is found. In a 3-parameter fit sensitive to cos2 phi(1) performed in the half-Dalitz spaces, s(-)&lt;= s(+) and s(-)&gt; s(+), where s(+/-)equivalent to m(2)((DKS0)-K-*+/-), we extract the CP violation parameters, J(c)/J(0)=0.60(-0.28)(+0.25)(stat)+/- 0.08(syst), 2J(s1)/J(0)sin2 phi(1)=-0.17(-0.42)(+0.42)(stat)+/- 0.09(syst), 2J(s2)/J(0)cos2 phi(1)=-0.23(-0.41)(+0.43)(stat)+/- 0.13(syst). A large value of J(c)/J(0) would indicate a significant resonant contribution from a broad unknown D-s(**+) state. Although the sign of the factor, 2J(s2)/J(0), can be deduced from theory, no conclusion can be drawn regarding the sign of cos2 phi(1) given the errors.

    DOI: 10.1103/PhysRevD.76.072004

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  • Measurement of Einstein-Podolsky-Rosen-type flavor entanglement in Y(4S) -&gt; B-0(B)over-bar0 decays 査読

    A. Go, A. Bay, K. Abe, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorisek, H. Ha, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, C. Jacoby, J. H. Kang, N. Katayama, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, J. Lee, M. J. Lee, T. Lesiak, A. Limosani, S.-W. Lin, Y. Liu, D. Liventsev, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, M. Peters, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schumann, A. J. Schwartz, R. Seidl, K. Senyo, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, J. Wicht, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   99 ( 13 )   131802-1 - 131802-6   2007年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    The neutral B meson pair produced at the Y(4S) should exhibit a nonlocal correlation of the type discussed by Einstein, Podolsky, and Rosen. We measure this correlation using the time-dependent flavor asymmetry of semileptonic B-0 decays, which we compare with predictions from quantum mechanics and two local realistic models. The data are consistent with quantum mechanics, and inconsistent with the other models. Assuming that some B pairs disentangle to produce B-0 and (B) over tilde (0) with definite flavor, we find a decoherent fraction of 0.029 +/- 0.057, consistent with no decoherence.

    DOI: 10.1103/PhysRevLett.99.131802

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  • Measurement of D-0-(D)over-bar(0) mixing parameters in D-0 -&gt; K-s pi(+)pi(-) decays 査読

    L. M. Zhang, Z. P. Zhang, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, C.-C. Chiang, I.-S. Cho, Y. Choi, Y. K. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, S. Kajiwara, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, Y. Liu, D. Liventsev, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, J. Schumann, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, S. Shinomiya, J.-G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, A. Vinokurova, C. H. Wang, M.-Z. Wang, P. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. Z. Yuan, C. C. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   99 ( 13 )   131803-1 - 131803-6   2007年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of D-0-(D) over bar (0) mixing parameters in D-0 -&gt; K-S(0)pi(+)pi(-) decays using a time-dependent Dalitz-plot analysis. We first assume CP conservation and subsequently allow for CP violation. The results are based on 540 fb(-1) of data accumulated with the Belle detector at the KEKB e(+)e(-) collider. Assuming negligible CP violation, we measure the mixing parameters x=(0.80 +/- 0.29(-0.07-0.14)(+0.09+0.10))% and y=(0.33 +/- 0.24(-0.12-0.08)(+0.08+0.06))%, where the errors are statistical, experimental systematic, and systematic due to the Dalitz decay model, respectively. Allowing for CP violation, we obtain the CP-violating parameters |q/p|=0.86(-0.29-0.03)(+0.30+0.06)+/- 0.08 and arg(q/p)=(-14(-18-3-4)(+16+5+2))degrees.

    DOI: 10.1103/PhysRevLett.99.131803

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  • Study of B+→pΛ̄γ, pΛ̄π0 and B0→pΛ̄π- 査読

    Wang M.-Z, Lee Y.-J, Abe K, Adachi I, Aihara H, Anipko D, Aushev T, Bahinipati S, Bakich A.M, Bedny I, Belous K, Bizjak I, Blyth S, Bondar A, Bra?ko M, Browder T.E, Chang M.-C, Chao Y, Chen A, Chen K.-F, Chen W.T, Cheon B.G, Chistov R, Cho I.-S, Choi Y, Choi Y.K, Cole S, Dalseno J, Dash M, Eidelman S, Fratina S, Gokhroo G, Ha H, Haba J, Hayasaka K, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou W.-S, Hsiung Y.B, Hyun H.J, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Joshi N, Kah D.H, Kang J.H, Katayama N, Kawasaki T, Kichimi H, Kim Y.J, Kinoshita K, Kri?an P, Krokovny P, Kumar R, Kuo C.C, Kwon Y.-J, Lee J.S, Lee M.J, Lee S.E, Lesiak T, Lin S.-W, Liventsev D, Mandl F, Matsumoto T, McOnie S, Medvedeva T, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney G.R, Nakao M, Nishida S, Nitoh O, Ohshima T, Okuno S, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park C.W, Park H, Park K.S, Pestotnik R, Piilonen L.E, Sakai Y, Satoyama N, Schneider O, Sch{\"u}mann J, Schwartz A.J, Senyo K, Shapkin M, Shibuya H, Shwartz B, Sokolov A, Somov A, Soni N, Stari? M, Stoeck H, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Teramoto Y, Tian X.C, Tsukamoto T, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Usov Y, Varner G, Varvell K.E, Vervink K, Villa S, Vinokurova A, Wang C.H, Wang P, Watanabe Y, Won E, Xie Q.L, Yamaguchi A, Yamashita Y, Zhang Z.P, Zhilich V, Zhulanov V, Zupanc A

    Physical Review D - Particles, Fields, Gravitation and Cosmology   76 ( 5 )   2007年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.76.052004

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    その他リンク: http://orcid.org/0000-0001-6373-2346

  • Study of ${B}^{+}{\rightarrow}p\overline{ { \Lambda } }{\gamma}$, $p\overline{ { \Lambda } }{ { \pi } }^{0}$ and ${B}^{0}{\rightarrow}p\overline{ { \Lambda } }{ { \pi } }^{ { - } }$ 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   76 ( 5 )   052004-1 - 052004-8   2007年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.76.052004

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  • Observation of the decay (B)over-bar(0) -&gt; D-s(+) Lambda (p)over-bar 査読

    T. Medvedeva, R. Chistov, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y. -J. Kwon, G. Leder, M. J. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, Y. Nagasaka, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, A. Zupanc

    PHYSICAL REVIEW D   76 ( 5 )   051102-1 - 051102-5   2007年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of the decay (B) over bar (0)-&gt; D-s(+)Lambda(p) over bar with a statistical significance of 6.6 sigma. We measure B((B) over bar (0)-&gt; D-s(+)Lambda(p) over bar)=(2.9 +/- 0.7 +/- 0.5 +/- 0.4)x10(-5), where the first error is statistical, the second is systematic, and the third error comes from the uncertainty in B(D-s(+)-&gt;phi pi(+)). The data used for this analysis was accumulated at the Upsilon(4S) resonance, using the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The integrated luminosity of the data sample is 414 fb(-1), corresponding to 449x10(6) B (B) over bar pairs.

    DOI: 10.1103/PhysRevD.76.051102

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  • Improved measurement of CP-violating parameters in B→ρ+ρ- decays 査読

    A. Somov, A. J. Schwartz, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, M. Bračko, T. E. Browder, M. C. Chang, Y. Chao, A. Chen, K. F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I. S. Cho, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. Joshi, D. H. Kah, J. H. Kang, N. Katayama, H. Kichimi, H. O. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. W. Lin, D. Marlow, T. Matsumoto, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, M. Nakao, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schümann, K. Senyo, M. Shapkin, C. P. Shen, H. Shibuya, B. Shwartz, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, F. Takasaki, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, M. Z. Wang, P. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, Z. P. Zhang, A. Zupanc

    Physical Review D - Particles, Fields, Gravitation and Cosmology   76 ( 1 )   2007年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We present a measurement of the CP-violating asymmetry in B0→ρ+ρ- decays using 535×106 BB̄ pairs collected with the Belle detector at the KEKB e+e- collider. We measure CP-violating coefficients A=0.16±0.21(stat)±0.08(syst) and S=0.19±0. 30(stat)±0.08(syst). These values are used to determine the unitarity triangle angle 2 using an isospin analysis
    the solution consistent with the standard model lies in the range 54°&lt
    2&lt
    113° at the 90% confidence level. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.76.011104

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  • Measurement of the tau lepton mass and an upper limit on the mass difference between tau(+) and tau(-) 査読

    K. Belous, M. Shapkin, A. Sokolov, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M.-C. Chang, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, M. Fujikawa, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, H. Ha, J. Haba, Y. Hasegawa, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, O. Schneider, J. Schuemann, R. Seidl, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, B. Singh, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, A. Vinokurova, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW LETTERS   99 ( 1 )   011801-1 - 011801-6   2007年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMERICAN PHYSICAL SOC  

    The mass of the tau lepton has been measured in the decay mode tau -&gt; 3 pi nu(tau) using a pseudomass technique. The result obtained from 414 fb(-1) of data collected with the Belle detector is M-tau=[1776.61 +/- 0.13(stat)+/- 0.35(sys)] MeV/c(2). The upper limit on the relative mass difference between positive and negative tau leptons is |M-tau(+)-M-tau(-)|/M-tau &lt; 2.8x10(-4) at 90% confidence level.

    DOI: 10.1103/PhysRevLett.99.011801

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  • High statistics measurement of the cross sections of γγ → π <sup>+</sup>π <sup>-</sup> production 査読

    Mori T, Uehara S, Watanabe Y, Abe K, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Bakich A.M, Balagura V, Barberio E, Bay A, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bra?ko M, Browder T.E, Chang M.-C, Chen A, Chen W.T, Cheon B.G, Cho I.-S, Choi S.-K, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Fratina S, Gabyshev N, Golob B, Ha H, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou W.-S, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kaji H, Kang J.H, Kapusta P, Katayama N, Kawasaki T, Kichimi H, Kim H.O, Kim S.K, Kim Y.J, Korpar S, Kri?an P, Krokovny P, Kumar R, Kuo C.C, Kuzmin A, Kwon Y.-J, Lee M.J, Lee S.E, Lesiak T, Li J, Limosani A, Lin S.-W, Liventsev D, MacNaughton J, Mandl F, Matsumoto T, Matyja A, Mconie S, Medvedeva T, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney G.R, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ohshima T, Okuno S, Olsen S.L, Ono S, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Pakhlova G, Park C.W, Park H, Park K.S, Pestotnik R, Piilonen L.E, Poluektov A, Sahoo H, Sakai Y, Satoyama N, Schneider O, Sch{\"u}mann J, Senyo K, Sevior M.E, Shapkin M, Shen C.P, Shibuya H, Shwartz B, Singh J.B, Sokolov A, Somov A, Soni N, Stani? S, Stari? M, Stoeck H, Sumiyoshi T, Suzuki S.Y, Takasaki F, Tamai K, Tanaka M, Taylor G.N, Teramoto Y, Tian X.C, Tikhomirov I, Tsuboyama T, Tsukamoto T, Ueno K, Uglov T, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Vervink K, Villa S, Vinokurova A, Wang C.H, Wang P, Won E, Xie Q.L, Yabsley B.D, Yamaguchi A, Yamashita Y, Zhang C.C, Zhang Z.P, Zhilich V, Zhulanov V, Zupanc A

    Journal of the Physical Society of Japan   76 ( 7 )   2007年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1143/JPSJ.76.074102

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    その他リンク: http://orcid.org/0000-0001-6373-2346

  • Study of (B)over-bar(0)-&gt; D-0 pi(+)pi(-) decays 査読

    A. Kuzmin, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M.-C. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y.-J. Kwon, S. E. Lee, T. Lesiak, S.-W. Lin, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, K. Senyo, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, C.-H. Wu, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   76 ( 1 )   012006-1 - 012006-11   2007年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the results of a study of neutral B meson decays to the D-0 pi(+)pi(-) final state, where the D-0 is fully reconstructed. The results are obtained from an event sample containing 388x10(6) B (B) over bar -meson pairs collected in the Belle experiment at the KEKB e(+)e(-) collider. The total branching fraction of the three-body decay B((B) over bar (0)-&gt; D-0 pi(+)pi(-))=(8.4 +/- 0.4(stat)+/- 0.8(syst))x10(-4) has been measured. The intermediate resonant structure of these three-body decays has been studied. From a Dalitz plot analysis we have obtained the product of the branching fractions for D-2(*+) and D-0(*+) production: B((B) over bar (0)-&gt; D-2(*+)pi(-))xB(D-2(*+)-&gt; D-0 pi(+))=(2.15 +/- 0.17(stat)+/- 0.29(syst)+/- 0.12(mod))x10(-4), and B((B) over bar (0)-&gt; D-0(*+)pi(-))xB(D-0(*+)-&gt; D-0 pi(+))=(0.60 +/- 0.13(stat)+/- 0.15(syst)+/- 0.22(mod))x10(-4). This is the first observation of the (B) over bar (0)-&gt; D-0(*+)pi(-) decay. The (B) over bar (0)-&gt; D-0 rho(0) and D(0)f(2) branching fractions are measured to be: B((B) over bar (0)-&gt; D-0 rho(0))=(3.19 +/- 0.20(stat)+/- 0.24(syst)+/- 0.38(mod))x10(-4), and B((B) over bar (0)-&gt; D(0)f(2))=(1.20 +/- 0.18(stat)+/- 0.21(syst)+/- 0.32(mod))x10(-4).

    DOI: 10.1103/PhysRevD.76.012006

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  • Improved measurement of CP-violating parameters in B -&gt;rho(+)rho(-) decays 査読

    A. Somov, A. J. Schwartz, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, M. Bracko, T. E. Browder, M.-C. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I.-S. Cho, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. Joshi, D. H. Kah, J. H. Kang, N. Katayama, H. Kichimi, H. O. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Marlow, T. Matsumoto, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, M. Nakao, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schuemann, K. Senyo, M. Shapkin, C. P. Shen, H. Shibuya, B. Shwartz, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, F. Takasaki, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, M.-Z. Wang, P. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, Z. P. Zhang, A. Zupanc

    PHYSICAL REVIEW D   76 ( 1 )   011104-1 - 011104-7   2007年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the CP-violating asymmetry in B-0 -&gt;rho(+)rho(-) decays using 535x10(6) B (B) over bar pairs collected with the Belle detector at the KEKB e(+)e(-) collider. We measure CP-violating coefficients A=0.16 +/- 0.21(stat)+/- 0.08(syst) and S=0.19 +/- 0.30(stat)+/- 0.08(syst). These values are used to determine the unitarity triangle angle phi(2) using an isospin analysis; the solution consistent with the standard model lies in the range 54 degrees &lt;phi(2)&lt; 113 degrees at the 90% confidence level.

    DOI: 10.1103/PhysRevD.76.011104

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  • Measurement of CP asymmetry in a time-dependent Dalitz analysis of B0 -&gt;(rho pi)(0) and a constraint on the quark mixing matrix angle phi(2) 査読

    A. Kusaka, C. C. Wang, H. Ishino, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, M. Fujikawa, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, H. Kakuno, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, K. Miyabayashi, H. Miyake, Y. Miyazaki, R. Mizuk, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, O. Schneider, J. Schuemann, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   98 ( 22 )   221602-1 - 221602-6   2007年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B-0 -&gt;pi(+)pi(-)pi(0) decays based on a 414 fb(-1) data sample containing 449x10(6)B(B) over bar pairs. The data was collected on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle phi(2), 68 degrees &lt;phi(2)&lt; 95 degrees as the 68.3% confidence interval for the phi(2) solution consistent with the standard model (SM). A large SM-disfavored region also remains.

    DOI: 10.1103/PhysRevLett.98.221602

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  • Experimental constraints on the spin and parity of the Lambda(c)(2880)(+) 査読

    R. Mizuk, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M.-C. Chang, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, P. Kapusta, N. Katayama, H. R. Khan, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, H. Miyake, H. Miyata, Y. Miyazaki, M. Nakao, Z. Natkaniec, S. Nishida, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, O. Schneider, J. Schuemann, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. Z. Yuan, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   98 ( 26 )   262001-1 - 262001-6   2007年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the results of several studies of the Lambda(+)(c)pi(+)pi X- final state in continuum e(+)e(-) annihilation data collected by the Belle detector. An analysis of angular distributions in Lambda(c)(2880)(+)-&gt;Sigma(c)(2455)(0,++)pi(+,-) decays strongly favors a Lambda(c)(2880)(+) spin assignment of 5/ over 3/2 or 1/2. We find evidence for Lambda(c)(2880)(+)-&gt;Sigma(c)(2520)(0,++)pi(+,-) decay and measure the ratio of Lambda(c)(2880)(+) partial widths Gamma(Sigma(c)(2520)pi)/Gamma(Sigma(c)(2455)pi)=0.225 +/- 0.062 +/- 0.025. This value favors the Lambda(c)(2880)(+) spin-parity assignment of 5/2(+) over 5/2(-). We also report the first observation of Lambda(c)(2940)(+)-&gt;Sigma(c)(2455)(0,++)pi(+,-) decay and measure Lambda(c)(2880)(+) and Lambda(c)(2940)(+) mass and width parameters. These studies are based on a 553 fb(-1) data sample collected at or near the Upsilon(4S) resonance at the KEKB collider.

    DOI: 10.1103/PhysRevLett.98.262001

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  • Measurement of charmless B decays to ηk* and ηρ 査読

    C. H. Wang, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, K. Belous, U. Bitenc, S. Blyth, A. Bondar, A. Bozek, M. Bračko, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W. S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, P. Kapusta, N. Katayama, H. R. Khan, H. Kichimi, Y. J. Kim, K. Kinoshita, R. Kulasiri, R. Kumar, C. C. Kuo, Y. J. Kwon, G. Leder, M. J. Lee, S. E. Lee, T. Lesiak, S. W. Lin, D. Liventsev, J. MacNaughton, T. Matsumoto, A. Matyja, S. McOnie, H. Miyake, H. Miyata, R. Mizuk, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, O. Schneider, J. Schümann, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, S. Y. Suzuki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, P. Urquijo, Y. Usov, G. Varner, S. Villa, M. Z. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    Physical Review D - Particles, Fields, Gravitation and Cosmology   75 ( 9 )   2007年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We report measurements of branching fractions and CP asymmetries for B→ηK* and B→ηρ decays. These results are obtained from a 414fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure the following branching fractions: B(B0→ηK*0)=(15.2±1.2±1.0) ×10-6 and B(B+→ηK*+)=(19.3-1.9+2.0±1.5)×10-6, where the first error is statistical and the second systematic. We also find a 2.7σ excess in the B+→ηρ+ mode and measure B(B+→ηρ+)=(4.1-1.3+1.4±0.4)×10-6&lt
    6.5×10-6 at 90% confidence level. For B0→ηρ0 decays, we determine the upper limit B(B0→ηρ0)&lt
    1.9×10-6 at 90% confidence level. The partial rate asymmetries are ACP(ηK*0)=0.17±0.08±0.01, ACP(ηK*+)=0.03±0.10±0.01, and ACP(ηρ+)=-0.04-0. 32+0.34±0.01. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.75.092005

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  • Evidence for D-0-(D)over-bar(0) mixing 査読

    M. Staric, B. Golob, K. Abe, K. Abe, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I.-S. Cho, S.-K. Choi, Y. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, A. Gorisek, H. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Higuchi, T. Hokuue, Y. Hoshi, W.-S. Hou, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, P. Kapusta, N. Katayama, T. Kawasaki, A. Kibayashi, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, H. Sahoo, Y. Sakai, N. Satoyama, O. Schneider, J. Schu R. Mann, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, B. Shwartz, A. Sokolov, A. Somov, S. Stanic, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, A. Vinokurova, C. H. Wang, M.-Z. Wang, Y. Watanabe, J. Wicht, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Y. Yuan, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   98 ( 21 )   211803-1 - 211803-6   2007年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We observe evidence for D-0-(D) over bar (0) mixing by measuring the difference in the apparent lifetime when a D-0 meson decays to the CP eigenstates K+K- and pi(+)pi(-) and when it decays to the final state K-pi(+). We find the relative difference of the lifetimes y(CP) to be [1.31 +/- 0.32(stat)+/- 0.25(syst)]%, 3.2 standard deviations from zero. We also search for a CP asymmetry between D-0 and (D) over bar (0) decays; no evidence for CP violation is found. These results are based on 540 fb(-1) of data recorded by the Belle detector at the KEKB e(+)e(-) collider.

    DOI: 10.1103/PhysRevLett.98.211803

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  • Observation of direct CP violation in B-0 -&gt;pi(+)pi(-) decays and model-independent constraints on the quark-mixing angle phi(2) 査読

    H. Ishino, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, M. Barbero, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bozek, M. Bracko, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorisek, H. Ha, J. Haba, K. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, Y. Iwasaki, J. H. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, A. Kibayashi, H. Kichimi, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kusaka, A. Kuzmin, Y.-J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, J. MacNaughton, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, C.-H. Wu, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   98 ( 21 )   211801-1 - 211801-6   2007年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a new measurement of the time-dependent CP-violating parameters in B-0 -&gt;pi(+)pi(-) decays with 535x10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider operating at the Upsilon(4S) resonance. We find 1464 +/- 65 B-0 -&gt;pi(+)pi(-) events and measure the CP-violating parameters S-pi pi=-0.61 +/- 0.10(stat)+/- 0.04(syst) and A(pi pi)=+0.55 +/- 0.08(stat)+/- 0.05(syst). We observe large direct CP violation with a significance greater than 5 standard deviations for any S-pi pi value. Using isospin relations, we measure the Cabibbo-Kobayashi-Maskawa quark-mixing matrix angle phi(2)=(97 +/- 11)degrees for the solution consistent with the standard model and exclude the range 11 degrees &lt;phi(2)&lt; 79 degrees at the 95% confidence level.

    DOI: 10.1103/PhysRevLett.98.211801

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  • Observation of B decays to two kaons 査読

    S.-W. Lin, P. Chang, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, J. Dragic, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, R. Kulasiri, C. C. Kuo, Y.-J. Kwon, J. S. Lange, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyaki, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, T. Mori, I. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schuemann, A. J. Schwartz, K. Senyo, M. Shapkin, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   98 ( 18 )   181804-1 - 181804-6   2007年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    Using 449x10(6) B(B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we observe clear signals for B+-&gt;(K) over bar K-0(+) and B-0 -&gt;(K) over bar K-0(0) decays with 5.3 sigma and 6.0 sigma significance, respectively. We measure the branching fractions B(B+-&gt;(K) over bar K-0(+))=(1.22(-0.28-0.16)(+0.32+0.13))x10(-6) and B(B-0 -&gt;(K) over bar K-0(0))=(0.87(-0.20)(+0.25)+/- 0.09)x10(-6), and partial-rate asymmetries A(CP)(B+-&gt;(K) over bar K-0(+))=0.13(-0.24)(+0.23)+/- 0.02 and A(CP)(B-0 -&gt;(K) over bar K-0(0))=-0.58(-0.66)(+0.73)+/- 0.04. From a simultaneous fit, we also obtain B(B+-&gt; K-0 pi(+))=(22.8(-0.7)(+0.8)+/- 1.3)x10(-6) and A(CP)(B+-&gt; K-0 pi(+))=0.03 +/- 0.03 +/- 0.01. The first and second error in the branching fractions and the partial-rate asymmetries are statistical and systematic, respectively. No signal is observed for B-0 -&gt; K+K- decays, and for this branching fraction, we set an upper limit of 4.1x10(-7) at the 90% confidence level.

    DOI: 10.1103/PhysRevLett.98.181804

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  • Search for lepton flavor violating tau(-) decays into l(-)eta, l(-)eta ' and l(-)pi(0) 査読

    Y. Miyazaki, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aziz, A. M. Bakich, E. B. Arberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, M. Bracko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, Y. Choi, Y. K. Choi, J. Dalseno, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Go, A. Gorisek, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, M. J. Lee, T. Lesiak, S.-W. Lin, F. Mandl, T. Matsumoto, H. Miyake, H. Miyata, T. Nagamine, Y. Nagasaka, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, A. Vinokurova, C. H. Wang, M. Watanabe, Y. Watanabe, E. Won, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICS LETTERS B   648 ( 5-6 )   341 - 350   2007年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We have searched for lepton-flavor-violating tau decays with a pseudoscalar meson (eta, eta' and pi(0)) using a data sample of 401 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No evidence for these decays is found and we set the following upper limits on the branching fractions: B(tau(-) -&gt; e(-)eta) &lt; 9.2 x 10(-8), B(tau(-) -&gt; mu(-)eta) &lt; 6.5 x 10(-8), B(tau- eta') &lt; 1.6 x 10(-7), B(tau(-) -&gt; mu(-)eta') &lt; 1.3 x 10(-7), B(tau(-) -&gt; e(-)pi(0)) &lt; 8.0 x 10(-8) and B(tau(-) -&gt; mu(-)pi(0)) &lt; 1.2 x 10(-7) at the 90% confidence level. These results improve our previously published upper limits by factors from 2.3 to 6.3. (c) 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.03.027

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  • Measurements of branching fractions and q(2) distributions for B -&gt; pi l nu and B -&gt; rho l nu decays with B -&gt; D-(*())l nu decay tagging 査読

    T. Hokuue, K. Abe, K. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, A. Gorisek, H. Ha, J. Haba, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasakia, Y. Iwasaki, H. Kakuno, J. H. Kang, P. Kapusta, S. U. Kataoka, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, H. O. Kim, K. Kinoshita, Y. Kozakai, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, D. Mohapatra, I. Nakamura, E. Nakano, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, A. Somov, R. Stamen, S. Stanic, M. Staric, H. Stoeck, A. Sugiyama, S. Suzuki, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, E. Won, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, L. M. Zhang, Z. R. Zhang, D. Zuercher

    PHYSICS LETTERS B   648 ( 2-3 )   139 - 148   2007年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We report measurements of the charmless semileptonic decays B-0 -&gt; pi(-)/rho(-)l(+)nu and B+ -&gt; pi(0)/rho(0)l(+)nu, based on a sample of 2.75 x 10(8) BB events collected at the Y(4S) resonance with the Belle detector at the KEKB e(+)e(-) asymmetric collider. In this analysis, the accompanying B meson is reconstructed in the semileptonic mode B -&gt; D((*))l nu, enabling detection of the signal modes with high purity. We measure the branching fractions B(B-0 -&gt; pi(-)l(+)nu) = (1.38 +/- 0.19 +/- 0.14 +/- 0.03) x 10(-4), B(B-0 -&gt; rho(-)l(+)nu) = (2.17 +/- 0.54 +/- 0.31 +/- 0.08) x 10(-4), B(B+ -&gt; pi(0)l(+)nu) = (0.77 +/- 0.14 +/- 0.08 +/- 0.00) x 10(-4) and B(B+ -&gt; rho(0)l(+)nu) = (1.33 +/- 0.23 +/- 0.17 +/- 0.05) x 10(-4), where the errors are statistical, experimental systematic, and systematic due to form factor uncertainties, respectively. For each mode we also present the partial branching fractions in three q(2) intervals: q(2) &lt; 8, 8 &lt;= q(2) &lt; 16, and q(2) &gt;= 16 GeV2/c(2). From our partial branching fractions for B -&gt; pi l nu and recent results for the form factor from unquenched Lattice QCD calculations, we obtain values of the CKM matrix element vertical bar V-ub vertical bar. (C) 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.02.067

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  • Measurement of charmless B decays to eta K-* and eta rho 査読

    C. H. Wang, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, K. Belous, U. Bitenc, S. Blyth, A. Bondar, A. Bozek, M. Bracko, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, P. Kapusta, N. Katayama, H. R. Khan, H. Kichimi, Y. J. Kim, K. Kinoshita, R. Kulasiri, R. Kumar, C. C. Kuo, Y.-J. Kwon, G. Leder, M. J. Lee, S. E. Lee, T. Lesiak, S.-W. Lin, D. Liventsev, J. MacNaughton, T. Matsumoto, A. Matyja, S. McOnie, H. Miyake, H. Miyata, R. Mizuk, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, O. Schneider, J. Schumann, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, S. Y. Suzuki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, P. Urquijo, Y. Usov, G. Varner, S. Villa, M.-Z. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   75 ( 9 )   092005-1 - 092005-10   2007年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurements of branching fractions and CP asymmetries for B -&gt;eta K-* and B -&gt;eta rho decays. These results are obtained from a 414 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure the following branching fractions: B(B-0 -&gt;eta K-*0)=(15.2 +/- 1.2 +/- 1.0)x10(-6) and B(B+-&gt;eta K*+)=(19.3(-1.9)(+2.0)+/- 1.5)x10(-6), where the first error is statistical and the second systematic. We also find a 2.7 sigma excess in the B+-&gt;eta rho(+) mode and measure B(B+-&gt;eta rho(+))=(4.1(-1.3)(+1.4)+/- 0.4)x10(-6)&lt; 6.5x10(-6) at 90% confidence level. For B-0 -&gt;eta rho(0) decays, we determine the upper limit B(B-0 -&gt;eta rho(0))&lt; 1.9x10(-6) at 90% confidence level. The partial rate asymmetries are A(CP)(eta K-*0)=0.17 +/- 0.08 +/- 0.01, A(CP)(eta K*+)=0.03 +/- 0.10 +/- 0.01, and A(CP)(eta rho(+))=-0.04(-0.32)(+0.34)+/- 0.01.

    DOI: 10.1103/PhysRevD.75.092005

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  • A search for the rare leptonic decays B+-&gt;mu(+)nu(mu) and B+-&gt; e(+)nu(e) 査読

    N. Satoyama, K. Abe, I. Adachi, H. Aihara, D. Anipko, A. M. Bakich, E. Barberio, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M.-C. Chang, P. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, H. Ha, J. Haba, Y. Hasegawa, K. Hayasaka, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, M. J. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, G. Majumder, T. Matsumoto, S. McOnie, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, T. Nagamine, I. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, T. Schietinger, O. Schneider, J. Schumann, C. Schwanda, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, L. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICS LETTERS B   647 ( 2-3 )   67 - 73   2007年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We present a search for the decays B+ -&gt; mu(+)nu(mu) and B+ -&gt; e(+)nu(e) in a 253 fb(-1) data sample collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy B factory. We find no significant evidence for a signal and set 90% confidence level upper limits of B(B+ -&gt;mu(+)nu(mu)) &lt; 1.7 x 10(-6) and B(B+ -&gt; e(+)nu(e)) &lt; 9.8 x 10(-7). (c) 2007 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2007.01.068

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  • Observation of the decay Upsilon(4S)-&gt;Upsilon(1S)pi(+) pi(-) 査読

    A. Sokolov, M. Shapkin, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, A. M. Bakich, E. Barberio, M. Barbero, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, M. Bracko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, T. Gershon, A. Go, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, A. Kuzmin, Y.-J. Kwon, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, T. Nagamine, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, M. E. Sevior, H. Shibuya, B. Shwartz, A. Somov, N. Soni, S. Stanic, H. Stoeck, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, Y. Watanabe, J. Wiechczynski, E. Won, C.-H. Wu, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   75 ( 7 )   071103-1 - 071103-6   2007年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMERICAN PHYSICAL SOC  

    We study transitions between Y states with the emission of charged pions using 477 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured product branching fraction B(Y(4S)-&gt; Y(1S)pi(+)pi(-))xB(Y(1S)-&gt;mu(+)mu(-))=(4.42 +/- 0.81(stat)+/- 0.56(sys))x10(-6). When the PDG value for B(Y(1S)-&gt;mu(+)mu(-)) is used, this corresponds to B(Y(4S)-&gt; Y(1S)pi(+)pi(-))=(1.78 +/- 0.33(stat)+/- 0.23(sys))x10(-4) and a partial decay width Gamma(Y(4S)-&gt; Y(1S)pi(+)pi(-))=(3.65 +/- 0.67(stat)+/- 0.65(sys)) keV.

    DOI: 10.1103/PhysRevD.75.071103

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  • Observation of the decay B-0 -&gt; J/psi eta 査読

    M. -C. Chang, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S. -K. Choi, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, S. U. Kataoka, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, G. Leder, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, T. Nagamine, I. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schumann, A. J. Schwartz, R. Seidl, K. Senyo, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, C. C. Zhang, L. M. Zhang, Z. P. Zhang, A. Zupanc

    PHYSICAL REVIEW LETTERS   98 ( 13 )   131803-1 - 131803-5   2007年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of B-0 -&gt; J/psi eta decay. These results are obtained from a data sample that contains 449x10(6) B (B) over bar pairs accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a signal with a significance of 8.1 sigma and obtain a branching fraction of (9.5 +/- 1.7(stat)+/- 0.8(syst))x10(-6).

    DOI: 10.1103/PhysRevLett.98.131803

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  • Measurement of the near-threshold e(+)e(-)-&gt; D-(*D-)+/-(()*()-/+) cross section using initial-state radiation 査読

    G. Pakhlova, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S. -K. Choi, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, K. Kinoshita, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, S. -W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, O. Schneider, J. Schumann, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, Stanic S., Staric M., H. Stoeck, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   98 ( 9 )   092001-1 - 092001-6   2007年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the exclusive e(+)e(-)-&gt;(DD*-/+)-D-(*)+/- cross section as a function of center-of-mass energy near the (DD*-/+)-D-(*)+/- threshold with initial-state radiation. A partial reconstruction technique is used to increase the efficiency and to suppress background. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 547.8 fb(-1).

    DOI: 10.1103/PhysRevLett.98.092001

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  • Search for invisible decay of the Upsilon(1S) 査読

    O. Tajima, H. Hayashii, M. Hazumi, K. Inami, Y. Iwasaki, S. Uehara, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, A. M. Bakich, E. Barberio, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, H. Ha, J. Haba, K. Hayasaka, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, K. Ikado, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, J. H. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lange, J. Lee, M. J. Lee, T. Lesiak, A. Limosani, S. -W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, J. Mueller, I. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schumann, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, T. Uglov, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   98 ( 13 )   132001-1 - 132001-6   2007年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMERICAN PHYSICAL SOC  

    We report results of a search for the invisible decay of the Upsilon(1S) via the Upsilon(3S)-&gt;pi(+)pi(-)Upsilon(1S) transition using a data sample of 2.9 fb(-1) at the Upsilon(3S) resonance. The data were collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No signal is found, and an upper limit for the branching fraction at the 90% confidence level is determined to be B(Upsilon(1S)-&gt; invisible)&lt; 2.5x10(-3).

    DOI: 10.1103/PhysRevLett.98.132001

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  • High statistics study of the f(0)(980) resonance in gamma gamma -&gt;pi(+)pi(-) production 査読

    T. Mori, S. Uehara, Y. Watanabe, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, B. Golob, H. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, A. Kibayashi, H. Kichimi, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, A. Kuzmin, Y. -J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. -W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, Y. Nagasaka, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, S. Ono, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, T. Uglov, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   75 ( 5 )   051101-1 - 051101-6   2007年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMERICAN PHYSICAL SOC  

    We report on a high statistics measurement of the cross section of the process gamma gamma -&gt;pi(+)pi(-) in the pi(+)pi(-) invariant mass range 0.8 GeV/c(2)&lt; W &lt; 1.5 GeV/c(2) with 85.9 fb(-1) of data collected at s=10.58 GeV and 10.52 GeV with the Belle detector. A clear signal for the f(0)(980) resonance is observed. From a fit to the mass spectrum, the mass, pi(+)pi(-) and two-photon decay widths of the resonance are found to be 985.6(-1.5)(+1.2)(stat)(-1.6)(+1.1)(syst) MeV/c(2), 34.2(-11.8)(+13.9)(stat)(-2.5)(+8.8)(syst) MeV, and 205(-83)(+95)(stat)(-117)(+147)(syst) eV, respectively.

    DOI: 10.1103/PhysRevD.75.051101

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  • Observation of a charmoniumlike state produced in association with a J/ψ in e+e- annihilation at s 10.6GeV 査読

    Abe K, Adachi I, Aihara H, Arinstein K, Asano Y, Aulchenko V, Aushev T, Aziz T, Bakich A.M, Balagura V, Barbero M, Bedny I, Bitenc U, Bizjak I, Bondar A, Bra?ko M, Brodzicka J, Browder T.E, Chao Y, Chen A, Cheon B.G, Chistov R, Choi S.-K, Choi Y, Choi Y.K, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Ha H.C, Haba J, Hasegawa Y, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hoshi Y, Hou S, Hou W.-S, Hsiung Y, B, Iijima T, Ishikawa A, Iwasaki M, Iwasaki Y, Kapusta P, Kawasaki T, Khan H.R, Kichimi H, Kim H.J, Kim S.M, Kinoshita K, Korpar S, Krokovny P, Kuo C.C, Kuzmin A, Lange J.S, Leder G, Lesiak T, Limosani A, Lin S.-W, Liventsev D, Mandl F, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyabayashi K, Miyata H, Mizuk R, Nagasaka Y, Nakano E, Nakao M, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Ozaki H, Pakhlov P, Palka H, Park C.W, Park H, Park K.S, Peak L.S, Piilonen L.E, Poluektov A, Sakai Y, Sato N, Schietinger T, Schneider O, Schwartz A.J, Seidl R, Senyo K, Sevior M.E, Shwartz B, Sidorov V, Somov A, Stamen R, Stari? M, Sumiyoshi T, Suzuki S.Y, Takasaki F, Tamura N, Tanaka M, Teramoto Y, Tian X.C, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Varner G, Varvell K.E, Villa S, Wang C.C, Wang C.H, Wang M.-Z, Won E, Xie Q.L, Yabsley B.D, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zhang C.C, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V

    Physical Review Letters   98 ( 8 )   2007年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysREvLett.98.082001

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Measurement of inclusive D-s, D-0, and J/psi rates and determination of the B-s((*)) (B)over-bar(s)((*)) production fraction in b(b)over-bar events at the Upsilon(5S) resonance 査読

    A. Drutskoy, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, S. Banerjee, E. Barberio, M. Barbero, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Higuchi, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lange, G. Leder, J. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, J. Wiechczynski, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   98 ( 5 )   052001-1 - 052001-6   2007年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMERICAN PHYSICAL SOC  

    The inclusive production of D-s, D-0, and J/psi mesons is studied using a 1.86 fb(-1) data sample collected on the Y(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The number of bb events in this Y(5S) data sample is determined. We measure the branching fractions B(Y(5S) -&gt; DsX)/2 = (23.6 +/- 1.2 +/- 3.6)%, B(Y(5S) -&gt; (DX)-X-0)/2 = (53.8 +/- 2.0 +/- 3.4)%, and B(Y(5S) -&gt; J/psi X)/2 = (1.030 +/- 0.080 +/- 0.067)%. From the D-s and D-0 inclusive branching fractions the ratio f(s) = (18.0 +/- 1.3 +/- 3.2)% of B-s((*)) B-s((*)) to the total bb quark pair production at the Y(5S) energy is obtained in a model-dependent way.

    DOI: 10.1103/PhysRevLett.98.052001

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  • Moments of the electron energy spectrum and partial branching fraction of B -&gt; X(c)e nu decays at the Belle detector 査読

    P. Urquijo, E. Barberio, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, M. Barbero, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lange, G. Leder, J. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, D. Liventsev, G. Majumder, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   75 ( 3 )   032001-1 - 032001-16   2007年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a measurement of the inclusive electron energy spectrum for charmed semileptonic decays of B mesons in a 140 fb(-1) data sample collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+) e(-) collider. We determine the first four moments of the electron energy spectrum for threshold values of the electron energy between 0.4 and 2.0 GeV. In addition, we provide values of the partial branching fraction (zeroth moment) for the same electron threshold energies, and independent measurements of the B+ and B-0 partial branching fractions at 0.4 GeV and 0.6 GeV electron threshold energies. We measure the independent B+ and B-0 partial branching fractions with electron threshold energies of 0.4 GeV to be Delta B(B+ -&gt; X(c)ev) = (10.79 +/- 0.25 (stat.) +/- 0.27 (sys.))% and Delta B(B-0 -&gt; X(c)ev) = (10.08 +/- 0.30 (stat.) +/- 0.22 (sys.))%. Full correlations between all measurements are evaluated.

    DOI: 10.1103/PhysRevD.75.032001

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  • Observation of time-dependent CP violation in B-0 -&gt;eta K-'(0) decays and improved measurements of CP asymmetries in B-0 -&gt;phi K-0, (KSKSKS0)-K-0-K-0 and B-0 -&gt; J/psi K-0 decays 査読

    K. -F. Chen, K. Hara, M. Hazumi, T. Higuchi, K. Miyabayashi, Y. Nakahama, K. Sumisawa, O. Tajima, Y. Ushiroda, Y. Yusa, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, S. Banerjee, E. Barberio, M. Barbero, A. Bay, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S. -K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, A. Garmash, T. Gershon, A. Go, G. Gokhroo, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kakuno, J. H. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kusaka, A. Kuzmin, Y. -J. Kwon, G. Leder, J. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, Y. Liu, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, A. Murakami, T. Nagamine, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schumann, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW LETTERS   98 ( 3 )   031802-1 - 031802-6   2007年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMERICAN PHYSICAL SOC  

    We present improved measurements of CP-violation parameters in B-0 -&gt; phi K-0, eta K-'(0), (KSKSKS0)-K-0-K-0 decays based on a sample of 535 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We obtain sin2 phi(eff)(1) = +0.64 +/- 0.10(stat) +/- 0.04(syst) for B-0 -&gt; eta K-'(0), +0.50 +/- 0.21(stat) +/- 0.06(syst) for B-0 -&gt;phi K-0, and +0.30 +/- 0.32(stat) +/- 0.08(syst) for B-0 -&gt; (KSKSKS0)-K-0-K-0 decays. We have observed CP violation in the B-0 -&gt; eta K-'(0) decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B-0 -&gt; J/psi K-0 decays and obtain sin2 phi(1) = +0.642 +/- 0.031(stat) +/- 0.017(syst).

    DOI: 10.1103/PhysRevLett.98.031802

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  • Study of the charmed baryonic decays (B)over-bar(0)-&gt;Sigma(++)(c) (p)over-bar pi(-) and (B)over-bar -&gt;Sigma(0)(c)(p)over-bar pi(+) 査読

    K. S. Park, H. Kichimi, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, S. Banerjee, E. Barberio, M. Barbero, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, P. Goldenzweig, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, T. Kawasaki, H. R. Khan, H. O. Kim, S. K. Kim, Y. J. Kim, S. Korpar, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, P. Pakhlov, G. Pakhlova, C. W. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, S. Villa, C. H. Wang, M. -Z. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   75 ( 1 )   2007年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We study the three-body charmed baryonic decays B-0 -&gt;Sigma(++)(c)p pi(-) and B-0 -&gt;Sigma(0)(c)p pi(+) in the four-body final state B-0 -&gt;Lambda(+)(c)p pi(+)pi(-), using a data sample of 357 fb(-1) accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure the branching fractions B(B-0 -&gt;Sigma(c)(2455)(++)p pi(-))=(2.1 +/- 0.2 +/- 0.3 +/- 0.5)x10(-4), B(B-0 -&gt;Sigma(c)(2455)(0)p pi(+))=(1.4 +/- 0.2 +/- 0.2 +/- 0.4)x10(-4) and B(B-0 -&gt;Sigma(c)(2520)(++)p pi(-))=(1.2 +/- 0.1 +/- 0.2 +/- 0.3)x10(-4) with signal significances of 13.1 sigma, 9.4 sigma and 7.1 sigma, respectively. The errors are statistical, systematic, and due to the uncertainty in B(Lambda(+)(c)-&gt; pK(-)pi(+)), respectively. We also set an upper limit B(B-0 -&gt;Sigma(c)(2520)(0)p pi(+))&lt; 0.38x10(-4) at the 90% confidence level. In addition, we obtain a nonresonant branching fraction of (6.4 +/- 0.4 +/- 0.9 +/- 1.7)x10(-4), and a total branching fraction of (11.2 +/- 0.5 +/- 1.4 +/- 2.9)x10(-4) for B-0 -&gt;Lambda(+)(c)p pi(+)pi(-).

    DOI: 10.1103/PhysRevD.75.011101

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  • Study of the charmed baryonic decays ${\overline{B } }^{0}{\rightarrow}{ { \Sigma } }_{c}^{++}\overline{p}{ { \pi } }^{ { - } }$ and ${\overline{B } }^{0}{\rightarrow}{ { \Sigma } }_{c}^{0}\overline{p}{ { \pi } }^{+}$ 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. D   75 ( 1 )   011101-1 - 011101-6   2007年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.75.011101

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  • Search for B+-&gt; J/psi eta ' K+ and B-0 -&gt; J/psi eta ' K-S(0) decays 査読

    Q. L. Xie, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, S. E. Lee, T. Lesiak, S. -W. Lin, Y. Liu, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, J. Mueller, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schumann, K. Senyo, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, C. H. Wang, M. -Z. Wang, Y. Watanabe, R. Wedd, E. Won, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   75 ( 1 )   017101-1 - 017101-6   2007年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMERICAN PHYSICAL SOC  

    We report the results of searches for B+ -&gt; J/psi eta'K+ and B-0 -&gt; J/psi eta'K-s(0) decays, using a sample of 388 X 10(6) B (B) over bar B pairs collected with the Belle detector at the Y(4S) resonance. No statistically significant signal is found for either of the two decay modes and upper limits for the branching fractions are determined to be B(B+ -&gt; J/psi eta K-'(+)) &lt; 8: 8 x 10(-5) and B(B-0 -&gt; J/psi eta'K-S(0)) &lt; 2.5 x 10(-5) at 90% confidence level.

    DOI: 10.1103/PhysRevD.75.017101

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  • Dalitz analysis of three-body charmless B-0 -&gt; K-0 pi(+) pi(-) decay 査読

    A. Garmash, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, S. E. Lee, T. Lesiak, J. Li, S. -W. Lin, Y. Liu, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schumann, C. Schwanda, A. J. Schwartz, K. Senyo, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, M. -Z. Wang, Y. Watanabe, E. Won, C. -H. Wu, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   75 ( 1 )   012006-1 - 012006-10   2007年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report results of a Dalitz plot analysis of the three-body charmless B-0 -&gt; K-0 pi(+)pi(-) decay. The analysis is performed with a data sample that contains 388x10(6) BB pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Measurements of branching fractions for the quasi-two-body decays B-0 -&gt;rho(770)K-0(0), B-0 -&gt; f(0)(980)K-0, B-0 -&gt; K-*(892)(+)pi(-), B-0 -&gt; K-*(1430)(+)pi(-), and upper limits on several other quasi-two-body decay modes are reported.

    DOI: 10.1103/PhysRevD.75.012006

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  • Measurements of time-dependent CP violation in B<sup>0</sup> → (2S)K<sup>0</sup><inf>S</inf> decays 査読

    Sahoo H, Browder T.E, Trabelsi K, Adachi I, Aihara H, Arinstein K, Aushev T, Bahinipati S, Bakich A.M, Balagura V, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bondar A, Bozek A, Bracko M, Chang M.-C, Chao Y, Chen A, T. Chen W, Cheon B.G, Chistov R, Cho I.-S, Choi Y, Dalseno J, Dash M, Drutskoy A, Eidelman S, Golob B, Ha H, Haba J, Hara K, Hara T, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hoshi Y, Hou W.-S, Hsiung Y.B, Hyun H.J, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Joshi N.J, Kah D.H, Kang J.H, Kapusta P, Katayama N, Kichimi H, Kim H.J, Kim Y.J, Kinoshita K, Korpar S, Kozakai Y, Krizan P, Krokovny P, Kumar R, Kuo C.C, Kuroki Y, Kwon Y.-J, Lee J.S, Lee M.J, Lee S.E, Lesiak T, Li J, Limosani A, Liventsev D, Mandl F, Matyja A, McOnie S, Medvedeva T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, R. Moloney G, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Pakhlov P, Pakhlova G, Palka H, Park C.W, Park H, Peak L.S, Pestotnik R, Piilonen L.E, Sakai Y, Schneider O, Schwanda C, Schwartz A.J, Senyo K, Sevior M.E, Shapkin M, Shen C.P, Shibuya H, Shiu J.-G, Shwartz B, Somov A, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Takasaki F, Tanaka M, Taylor G.N, Teramoto Y, Tikhomirov I, Uehara S, Ueno K, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell K.E, Vervink K, Villa S, Wang C.H, Wang P, Wang X.L, Watanabe Y, Wedd R, Won E, Yamamoto H, Yamashita Y, Zhang C.C, Zhang Z.P, Zhulanov V, Zupanc A

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007年

  • Observation of Ψ (4415) → DD<sup>*</sup><inf>2</inf> (2460) decay using initial-state radiation 査読

    Pakhlova G, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Bakich A.M, Balagura V, Barberio E, Bedny I, Belous K, Bitenc U, Bondar A, Bracko M, Brodzicka J, Browder T.E, Chen A, Chen W.T, Cheon B.G, Chiang C.C, Chistov R, Cho I.-S, Choi Y, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Gabyshev N, Golob B, Ha H, Haba J, Hayasaka K, Hazumi M, Heffernan D, Hoshi Y, Hou W.-S, Hsiung Y.B, Hyun H.J, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Joshi N.J, Kah D.H, Kang J.H, Kawasaki T, Kibayashi A, Kichimi H, Kim H.J, Kim H.O, Kim Y.J, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo C.C, Kuzmin A, Kwon Y.-J, Lange J.S, Lee M.J, Lee S.E, Lesiak T, Lin S.-W, Liventsev D, Mandl F, Marlow D, McOnie S, Medvedeva T, Miyake H, Mizuk R, Mohapatra D, Moloney G.R, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Ozaki H, Pakhlov P, Park H, Park K.S, Peak L.S, Pestotnik R, Piilonen L.E, Poluektov A, Sakai Y, Schneider O, Schwanda C, Senyo K, Shapkin M, Shen C.P, Shibuya H, Shiu J.-G, Shwartz B, Singh J.B, Somov A, Stanic S, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Taylor G.N, Teramoto Y, Tikhomirov I, Uehara S, Ueno K, Uglov T, Unno Y, Uno S, Usov Y, Varner G, Vinokurova A, Wang C.H, Wang M.-Z, Wang P, Wang X.L, Watanabe Y, Won E, Yabsley B.D, Yamaguchi A, Yamashita Y, Yamauchi M, Yuan C.Z, Zhang C.C, Zhang L.M, Zhang Z.P, Zhilich V, Zhulanov V, Zupanc A

    23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007   2007年

  • Moments of the electron energy spectrum and partial branching fraction of B-->Xcenu decays at the Belle detector

    Urquijo P., Barberio E., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Aulchenko V., Aushev T., Barbero M., Belous K., Hayashii H., Hazumi M., Nakano E., Heffernan D., Hoshi Y., Hou S., Hou W. -S., Iijima T., Imoto A., Inami K., Satoyama N., Ishikawa A., Itoh R., Iwasaki M., Nakao M., Iwasaki Y., Kang J. H., Katayama N., Kawai H., Kawasaki T., Khan H. R., Schietinger T., Kichimi H., Kim S. K., Kim Y. J., Kinoshita K., Natkaniec Z., Korpar S., Križan P., Krokovny P., Kulasiri R., Kumar R., Bizjak I., Kuo C. C., Kuzmin A., Kwon Y. -J., Lange J. S., Leder G., Nishida S., Lee J., Lee M. J., Lesiak T., Li J., Schneider O., Limosani A., Lin S. -W., Liventsev D., Majumder G., Matsumoto T., Matyja A., Nitoh O., McOnie S., Mitaroff W., Miyabayashi K., Schwanda C., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Nagamine T., Nagasaka Y., Nozaki T., Ogawa S., Ohshima T., Seidl R., Okuno S., Bitenc U., Onuki Y., Pakhlov P., Pakhlova G., Park H., Park K. S., Pestotnik R., Piilonen L. E., Sakai Y., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Dalseno J., Shwartz B., Singh J. B., Sokolov A., Blyth S., Somov A., Stanič S., Starič M., Stoeck H., Sumisawa K., Sumiyoshi T., Danilov M., Suzuki S. Y., Takasaki F., Tamai K., Tamura N., Bondar A., Tanaka M., Taylor G. N., Teramoto Y., Tian X. C., Trabelsi K., Dash M., Tsukamoto T., Uehara S., Uglov T., Ueno K., Unno Y., Bozek A., Uno S., Usov Y., Varner G., Varvell K. E., Dragic J., Villa S., Wang C. C., Wang C. H., Watanabe Y., Wedd R., Won E., Bračko M., Xie Q. L., Yabsley B. D., Yamaguchi A., Drutskoy A., Yamashita Y., Yamauchi M., Yusa Y., Zhang L. M., Zhang Z. P., Zhilich V., Zupanc A., Brodzicka J., Browder T. E., Chang P., Eidelman S., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Chuvikov A., Cole S., Fratina S., Gabyshev N., Gershon T., Go A., Nakamura I., Gokhroo G., Goldenzweig P., Golob B., Ha H., Haba J., Hara T., Hastings N. C., Hayasaka K., Miyata Hitoshi, 宮田 等

    PHYSICAL REVIEW D   75 ( 32001 )   1 - 16   2007年

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    記述言語:英語   出版者・発行元:The American Physical Society  

    DOI: 10.1103/PhysRevD.75.032001

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  • Observation of B+→Ξ̄c0Λc+ and evidence for B0→Ξ̄c-Λc+ 査読

    Chistov R, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich A.M, Balagura V, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chao Y, Chen A, Chen W.T, Cheon B.G, Choi S.-K, Choi Y, Choi Y.K, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Garmash A, Gershon T, Go A, Golob B, Gori?ek A, Ha H.C, Haba J, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Iijima T, Ishikawa A, Iwasaki M, Iwasaki Y, Kapusta P, Katayama N, Kawasaki T, Khan H.R, Kichimi H, Kim H.J, Kim S.M, Kinoshita K, Korpar S, Krokovny P, Kulasiri R, Kuo C.C, Kuzmin A, Kwon Y.-J, Leder G, Lesiak T, Lin S.-W, Liventsev D, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mueller J, Nagasaka Y, Nakano E, Nakao M, Nishida S, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Park K.S, Peak L.S, Pestotnik R, Piilonen L.E, Poluektov A, Sakai Y, Sato N, Satoyama N, Schietinger T, Schneider O, Senyo K, Sevior M.E, Shwartz B, Sidorov V, Somov A, Stamen R, Stani? S, Stari? M, Sumiyoshi T, Suzuki S.Y, Takasaki F, Tamura N, Tanaka M, Taylor G.N, Teramoto Y, Tian X.C, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Usov Y, Varner G, Varvell K.E, Villa S, Wang C.C, Wang C.H, Wang M.-Z, Won E, Xie Q.L, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang C.C, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V

    Physical Review D - Particles, Fields, Gravitation and Cosmology   74 ( 11 )   2006年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.74.111105

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Evidence of the purely leptonic decay B- -&gt; tau(-)(v)over-bar(tau) 査読

    K. Ikado, K. Abe, K. Abe, I. Adachi, H. Aihara, K. Akai, M. Akemoto, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, Y. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, D. Epifanov, J. Flanagan, S. Fratina, K. Furukawa, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorisek, H. Ha, J. Haba, K. Hara, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, N. Iida, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, T. Kamitani, J. H. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, E. Kikutani, H. J. Kim, H. O. Kim, K. Kinoshita, H. Koiso, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lange, G. Leder, J. Lee, T. Lesiak, A. Limosani, S. -W. Lin, D. Liventsev, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, S. Michizono, T. Mimashi, W. Mitaroff, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Nagamine, I. Nakamura, T. T. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, Y. Ogawa, K. Ohmi, T. Ohshima, N. Ohuchi, K. Oide, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, C. W. Park, H. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, Y. Sakai, T. Schietinger, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, T. Shidara, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, M. Tawada, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, M. Yoshida, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Zuercher

    PHYSICAL REVIEW LETTERS   97 ( 25 )   251802-1 - 251802-6   2006年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present the first evidence of the decay B--&gt;tau(-)nu(tau), using 414 fb(-1) of data collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We detect the signal with a significance of 3.5 standard deviations including systematics and measure the branching fraction to be B(B--&gt;tau(-)nu(tau))=(1.79(-0.49)(+0.56)(stat)(-0.51)(+0.46)(syst))x10(-4). This implies that f(B)=0.229(-0.031)(+0.036)(stat)(-0.037)(+0.034)(syst) GeV and is the first direct measurement of this quantity.

    DOI: 10.1103/PhysRevLett.97.251802

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  • Improved measurements of branching fractions and CP partial rate asymmetries for B -&gt;omega K and B -&gt;omega pi 査読

    C. -M. Jen, P. Chang, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, A. M. Bakich, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, S. -K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, Y. J. Kim, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, G. Leder, S. E. Lee, Y. -J. Lee, T. Lesiak, S. -W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, T. Schietinger, O. Schneider, A. J. Schwartz, R. Seidl, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, A. Somov, N. Soni, S. Stanic, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, E. Won, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang, V. Zhilich, A. Zupanc

    PHYSICAL REVIEW D   74 ( 11 )   111101-1 - 111101-6   2006年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report improved measurements of B to pseudoscalar-vector decays containing an omega meson in the final state. Our results are obtained from a data sample that contains 388x10(6) B (B) over bar pairs accumulated at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure the following branching fractions: B(B+-&gt;omega K+)=[8.1 +/- 0.6(stat.)+/- 0.6(syst.)]x10(-6), B(B+-&gt;omega pi(+))=[6.9 +/- 0.6(stat.)+/- 0.5(syst.)]x10(-6), and B(B-0 -&gt;omega K-0)=[4.4(-0.7)(+0.8)(stat.)+/- 0.4(syst.)]x 10(-6). The partial width ratio (Gamma(B+-&gt;omega K+))/(Gamma(B0 -&gt;omega K0))=1.7 +/- 0.3(stat.)+/- 0.1(sys.). We also set the 90% confidence level upper limit B(B-0 -&gt;omega pi(0))&lt; 2.0x10(-6). In addition, we obtain the partial rate asymmetries A(CP)=0.05(-0.07)(+0.08)(stat.)+/- 0.01(syst.) for B+-&gt;omega K+, and A(CP)=-0.02 +/- 0.09(stat.)+/- 0.01(syst.) for B+-&gt;omega pi(+).

    DOI: 10.1103/PhysRevD.74.111101

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  • First observation of the decay tau(-)-&gt;phi K-upsilon(tau) 査読

    K. Inami, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, E. Barberio, M. Barbero, I. Bedny, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, A. Chen, K. -F. Chen, W. T. Chen, R. Chistov, Y. Choi, Y. K. Choi, J. Dalseno, M. Danilov, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, H. Ha, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, J. H. Kang, P. Kapusta, S. U. Kataoka, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, A. Kuzmin, Y. -J. Kwon, G. Leder, T. Lesiak, S. -W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, J. Mueller, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, H. Palka, C. W. Park, H. Park, L. S. Peak, L. E. Piilonen, A. Poluektov, Y. Sakai, T. Schietinger, O. Schneider, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, S. Y. Suzuki, O. Tajima, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, E. Won, C. -H. Wu, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, L. M. Zhang, V. Zhilich, A. Zupanc

    PHYSICS LETTERS B   643 ( 1 )   5 - 10   2006年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We present the first observation of tau lepton decays to hadronic final states with a phi-meson. This analysis is based on 401 fb(-1) of data accumulated at the Belle experiment. The branching fraction obtained is B(tau(-) -&gt; phi K(-)v(tau)) = (4.05 +/- 0.25 +/- 0.26) x 10(-5). (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2006.10.027

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  • Improved measurements of color-suppressed decays (B)over-bar(0)-&gt; D-0 pi(0), D-0 eta, D-0 omega, D-*0 pi(0), D-*0 eta and D-*0 omega 査読

    S. Blyth, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorisek, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, H. O. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, G. Leder, J. Lee, S. -W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. Schietinger, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, R. Seidl, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, S. Suzuki, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, E. Won, C. -H. Wu, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang

    PHYSICAL REVIEW D   74 ( 9 )   092002-1 - 092002-10   2006年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present improved measurements of the branching fractions of the color-suppressed decays (B) over bar (0)-&gt; D((*)0)h(0), where h(0) represents a light neutral meson pi(0), eta or omega. The measurements are based on a data sample of 140 fb(-1) collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider, corresponding to 7 times the luminosity of the previous Belle measurements. All the measured branching fractions fall in the range 1.4-2.4x10(-4), which is significantly higher than theoretical predictions based on naive factorization.

    DOI: 10.1103/PhysRevD.74.092002

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  • Observation of a near-threshold D-0(D)over-bar(0)pi(0) enhancement in B -&gt; D-0(D)over-bar(0)pi K-0 decay 査読

    G. Gokhroo, G. Majumder, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, S. Banerjee, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, R. Chistov, S. -K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, S. Fratina, T. Gershon, A. Go, B. Golob, A. Gorisek, H. Ha, J. Haba, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. S. Lange, G. Leder, T. Lesiak, S. -W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, Y. Nagasaka, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. R. Sarangi, T. Schietinger, O. Schneider, R. Seidl, K. Senyo, M. Shapkin, H. Shibuya, V. Sidorov, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, A. Sugiyama, T. Sumiyoshi, F. Takasaki, M. Tanaka, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Usov, G. Varner, S. Villa, C. H. Wang, M. -Z. Wang, Y. Watanabe, E. Won, C. -H. Wu, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich

    PHYSICAL REVIEW LETTERS   97 ( 16 )   162002-1 - 162002-5   2006年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of a near-threshold enhancement in the (DD0)-D-0 pi(0) system from B -&gt;(DD0)-D-0 pi K-0 decays using a 414 fb(-1) data sample collected at the Upsilon(4S) resonance. The enhancement peaks at a mass M=3875.2 +/- 0.7(-1.6)(+0.3)+/- 0.8 MeV/c(2) and the branching fraction for events in the peak is B(B -&gt;(DD0)-D-0 pi K-0)=(1.22 +/- 0.31(+0.23)(-0.30)) x 10(-4). The data were collected with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider.

    DOI: 10.1103/PhysRevLett.97.162002

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  • Observation of new states decaying into Lambda K-c(-)pi(+) and Lambda K-+(c)S(0)pi(-) 査読

    R. Chistov, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, J. Brodzicka, T. E. Browder, M. -C. Chang, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorisek, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, H. O. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, G. Leder, J. Lee, T. Lesiak, S. -W. Lin, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. Schietinger, O. Schneider, A. J. Schwartz, R. Seidl, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, T. Sumiyoshi, S. Suzuki, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, E. Won, C. -H. Wu, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang

    PHYSICAL REVIEW LETTERS   97 ( 16 )   162001-1 - 162001-6   2006年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of two charmed strange baryons that decay into Lambda K-+(c)-pi(+). The broader of the two states is measured to have a mass of 2978.5 +/- 2.1 +/- 2.0 MeV/c(2) and a width of 43.5 +/- 7.5 +/- 7.0 MeV/c(2). The mass and width of the narrow state are measured to be 3076.7 +/- 0.9 +/- 0.5 MeV/c(2) and 6.2 +/- 1.2 +/- 0.8 MeV/c(2), respectively. We also perform a search for the isospin partner states that decay into Lambda K-+(c)S(0)pi(-) and observe a significant signal at the mass of 3082.8 +/- 1.8 +/- 1.5 MeV/c(2). The data used for this analysis were accumulated at or near the Upsilon(4S) resonance, using the Belle detector at the e(+)e(-) asymmetric-energy collider KEKB. The integrated luminosity of the data sample used is 461.5 fb(-1).

    DOI: 10.1103/PhysRevLett.97.162001

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  • Study of J/ψ→pp̄,ΛΛ̄ and observation of ηc→ΛΛ̄ at Belle 査読

    C. H. Wu, M. Z. Wang, t, al, Belle Collaboation

    Physical Review Letters   97 ( 16 )   2006年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We study the baryonic charmonium decays of B mesons B+→ηcK+ and B+→J/ψK+, where the ηc and J/ψ subsequently decay into a pp̄ or ΛΛ̄ pair. We measure the J/ψ→pp̄ and ΛΛ̄ anisotropy parameters αB=-0.60±0. 13±0.14 (pp̄), -0.44±0.51±0.31 (ΛΛ̄ ) and compare to results from e+e-→J/ψ formation experiments. We also report the first observation of ηc→ΛΛ̄. The measured branching fraction is B(ηc→ΛΛ̄)=(0.87-0.21+0. 24(stat)-0.14+0.09(syst)±0.27(PDG))×10-3. This study is based on a 357fb-1 data sample recorded on the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.97.162003

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  • Study of $J/{\psi}{\rightarrow}p\overline{p}, {\Lambda}\overline{ { \Lambda } }$ and Observation of ${ { \eta } }_{c}{\rightarrow}{\Lambda}\overline{ { \Lambda } }$ at Belle 査読

    The Belle collaboration, K, Hayasaka は

    Phys. Rev. Lett.   97 ( 16 )   162003-1 - 162003-6   2006年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.97.162003

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  • Search for neutrinoless decays tau -&gt; lhh and tau -&gt; lV(0) 査読

    Y. Yusa, K. Abe, K. Abe, I. Adachi, H. Aihara, Y. Asano, V. Aulchenko, A. Bay, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, T. E. Browder, A. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, A. Gorisek, H. C. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. -S. Hou, T. Iijima, K. Ikado, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, S. Korpar, P. Krizan, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y. J. Kwon, T. Lesiak, S. -W. Lin, D. Liventsev, G. Majumder, T. Matsumoto, W. Mitaroff, Y. Miyazaki, R. Mizuk, T. Nagamine, E. Nakano, Z. Natkaniec, S. Nishida, S. Ogawa, T. Ohshima, T. Okabe, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, H. Palka, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, M. Shapkin, H. Shibuya, B. Shwartz, A. Sokolov, A. Somov, N. Soni, R. Stamen, S. Stanic, M. Staric, K. Sumisawa, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, S. Uno, Y. Usov, G. Varner, S. Villa, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang

    PHYSICS LETTERS B   640 ( 4 )   138 - 144   2006年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We have searched for neutrinoless tau lepton decays into lhh or lV(0), where l stands for an electron or muon, h for a charged light hadron, pi or K, and V-0 for a neutral vector meson, rho(0), K*(892)(0) and phi, using a 158 fb(-1) data sample collected with the Belle detector at the KEKB e(+)e(-) collider. Since the number of events observed are consistent with the expected background, we set upper limits on the branching fractions in the range of (1.6-8.0) x 10(-7) for various decay modes at the 90% confidence level. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2006.07.025

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  • Observation of B-+/- -&gt; X-c1 pi(+/-) and search for direct CP violation 査読

    R. Kumar, J. B. Singh, K. Abe, K. Abe, H. Aihara, D. Anipko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, S. Blyth, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorisek, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, A. Imoto, K. Inami, R. Itoh, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, K. Kinoshita, P. Krokovny, C. C. Kuo, Y. -J. Kwon, G. Leder, S. -W. Lin, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, J. Mueller, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. Schietinger, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, R. Seidl, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, N. Soni, M. Staric, H. Stoeck, S. Suzuki, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, L. M. Zhang, Z. P. Zhang, A. Zupanc

    PHYSICAL REVIEW D   74 ( 5 )   051103-1 - 051103-6   2006年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first observation of B-+/--&gt;chi(c1)pi(+/-), a Cabibbo- and color-suppressed decay in a data sample of 386x10(6) B (B) over bar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe 55 +/- 10 signal events with a statistical significance of 6.3 sigma including systematic uncertainties. The measured branching fraction and charge-asymmetry is B(B-+/--&gt;chi(c1)pi(+/-))=(2.2 +/- 0.4 +/- 0.3)x10(-5) and A(pi)=0.07 +/- 0.18 +/- 0.02, respectively. We also determine the ratio B(B-+/--&gt;chi(c1)pi(+/-))/B(B-+/--&gt;chi K-c1(+/-))=(4.3 +/- 0.8 +/- 0.3)%.

    DOI: 10.1103/PhysRevD.74.051103

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  • Evidence for B -&gt;eta(')pi and improved measurements for B -&gt;eta ' K 査読

    J. Schumann, C. H. Wang, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, M. -C. Chang, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorisek, H. C. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, S. M. Kim, K. Kinoshita, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lange, J. Lee, T. Lesiak, A. Limosani, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, T. Nagamine, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, M. Rozanska, Y. Sakai, T. R. Sarangi, N. Sato, T. Schietinger, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, N. Soni, R. Stamen, S. Stanic, M. Staric, K. Sumisawa, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, M. -Z. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yusa, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Zuercher

    PHYSICAL REVIEW LETTERS   97 ( 6 )   061802-1 - 061802-6   2006年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report evidence for the exclusive two-body charmless hadronic B meson decay B -&gt;eta(')pi, and improved measurements of B -&gt;eta K-'. The results are obtained from a data sample of 386x10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure B(B+-&gt;eta(')pi(+))=[1.76(-0.62)(+0.67)(stat)(-0.14)(+0.15)(syst)]x10(-6) and B(B-0 -&gt;eta(')pi(0))= [2.79(-0.96)(+1.02)(stat)(-0.34)(+0.25)(syst)]x10(-6). We also find the ratio of B(B+-&gt;eta K-'(+))/B(B-0 -&gt;eta K-'(0))=1.17 +/- 0.08(stat)+/- 0.03(syst) and measure the direct CP asymmetries for the charged modes.

    DOI: 10.1103/PhysRevLett.97.061802

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  • Measurement of the quark mixing parameter cos2 phi(1) using time-dependent Dalitz analysis of (B)over-bar(0)-&gt; D[K-S(0)pi(+)pi(-)]h(0) 査読

    P. Krokovny, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, A. Gorisek, H. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Krizan, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. Lee, T. Lesiak, J. Li, S. -W. Lin, G. Majumder, T. Matsumoto, S. McOnie, W. Mitaroff, K. Miyabayashi, Y. Miyazaki, T. Mori, I. Nakamura, M. Nakao, S. Nishida, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, H. Ozaki, P. Pakhlov, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, Y. Sakai, T. R. Sarangi, N. Sato, N. Satoyama, T. Schietinger, O. Schneider, K. Senyo, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, R. Stamen, M. Staric, H. Stoeck, K. Sumisawa, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, P. Urquijo, Y. Ushiroda, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, L. M. Zhang, Z. P. Zhang, V. Zhilich

    PHYSICAL REVIEW LETTERS   97 ( 8 )   081801-1 - 081801-6   2006年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the angle phi(1) of the Cabibbo-Kobayashi-Maskawa unitarity triangle using a time-dependent Dalitz analysis of D -&gt; K-S(0)pi(+)pi(-) decays produced in neutral B meson decay to a neutral D meson and a light meson ((B) over bar (0)-&gt; D((*))h(0)). The method allows a direct extraction of 2 phi(1) and, therefore, helps to resolve the ambiguity between 2 phi(1) and pi-2 phi(1) in the measurement of sin2 phi(1). We obtain sin2 phi(1)=0.78 +/- 0.44 +/- 0.22 and cos2 phi(1)=1.87(-0.53-0.32)(+0.40+0.22). The sign of cos2 phi(1) is determined to be positive at 98.3% C.L.

    DOI: 10.1103/PhysRevLett.97.081801

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  • Measurement of D-0 -&gt;pi l nu(Kl nu) form factors and absolute branching fractions 査読

    L. Widhalm, K. Abe, K. Abe, I. Adachi, H. Aihara, K. Arinstein, Y. Asano, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorisek, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kakuno, J. H. Kang, P. Kapusta, S. U. Kataoka, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, H. O. Kim, K. Kinoshita, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. S. Lange, G. Leder, J. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, H. Miyata, Y. Miyazaki, D. Mohapatra, I. Nakamura, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, P. Pakhlov, C. W. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, A. Somov, R. Stamen, S. Stanic, M. Staric, H. Stoeck, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, Y. Yamashita, M. Yamauchi, J. Ying, L. M. Zhang, Z. P. Zhang, D. Zuercher

    PHYSICAL REVIEW LETTERS   97 ( 6 )   061804-1 - 061804-6   2006年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMERICAN PHYSICAL SOC  

    Using a 282 fb(-1) data sample collected by the Belle experiment at the KEKB e(+)e(-) collider, we study D-0 decays to K-center dot(+)nu and pi(-)center dot(+)nu final states. The D-0 flavor and momentum are tagged through a full reconstruction of the recoiling charm meson and additional mesons from fragmentation. The reconstruction method provides very good resolution in neutrino momentum and in q(2)=(p(center dot)+p(nu))(2). Normalizing to the total number of D-0 tags, we measure the absolute branching fractions to be B(D-0 -&gt; K center dot nu)=(3.45 +/- 0.07(stat)+/- 0.20(syst))% and B(D-0 -&gt;pi center dot nu)=(0.255 +/- 0.019(stat)+/- 0.016(syst))% and the semileptonic form factors (within the modified pole model) f(+)(K)(0)=0.695 +/- 0.007(stat)+/- 0.022(syst) and f(+)(pi)(0)=0.624 +/- 0.020(stat)+/- 0.030(syst).

    DOI: 10.1103/PhysRevLett.97.061804

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  • Search for lepton flavor violating tau(-) decays with a K-S(0) meson 査読

    Y. Miyazaki, K. Abe, K. Abe, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, M. Barber, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, A. Chen, W. T. Chen, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, S. Eidelman, D. Epifanov, N. Gabyshev, T. Gershon, A. Gorisek, H. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, H. Kawai, H. R. Khan, H. Kichimi, H. O. Kim, S. Korpar, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. Lee, T. Lesiak, S. -W. Lin, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, H. Ozaki, H. Palka, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, T. Schietinger, O. Schneider, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, V. Zhilich

    PHYSICS LETTERS B   639 ( 3-4 )   159 - 164   2006年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We have searched for the lepton flavor violating decays tau(-) l-K-S(0) (l = e or mu), using a data sample of 281 fb(-1) collected with the Belles detector at the KEKB e(+)e(-) asymmetric-energy collider. No evidence for a signal was found in either of the decay modes, and we set the following upper limits for the branching fractions: B(tau(-) -&gt; e-K-S(0)) &lt; 5.6 x 10(-8) and B(tau(-) -&gt; K-S(O)) &lt; 4.9 x 10(-8) at the 90% confidence level. These results improve the previously published limits set by the CLEO Collaboration by factors of 16 and 19, respectively. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2006.05.086

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  • Search for the h(c) meson in B-+/--&gt; h(c)K(+/-) 査読

    F. Fang, T. E. Browder, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, A. M. Bakich, V. Balagura, M. Barbero, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bozek, M. Bracko, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, H. Ha, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, S. Hou, W. -S. Hou, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, A. Kibayashi, H. Kichimi, H. J. Kim, K. Kinoshita, P. Krizan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. Lee, T. Lesiak, S. -W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, Y. Onuki, H. Ozaki, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. Schietinger, O. Schneider, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Somov, N. Soni, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich

    PHYSICAL REVIEW D   74 ( 1 )   012007-1 - 012007-7   2006年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report a search for the h(c) meson via the decay chain B-+/--&gt; h(c)K(+/-), h(c)-&gt;eta(c)gamma with eta(c)-&gt;(KSK +/-)-K-0 pi(-/+) and p (p) over bar. No significant signals are observed. We obtain upper limits on the branching fractions for B-+/--&gt;eta(c)gamma K-+/- in bins of the eta(c)gamma invariant mass. The results are based on an analysis of 253 fb(-1) of data collected by the Belle detector at the KEKB e(+)e(-) collider.

    DOI: 10.1103/PhysRevD.74.012007

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  • Observation of b -&gt; d gamma and determination of vertical bar V-td/V-ts vertical bar 査読

    D. Mohapatra, M. Nakao, S. Nishida, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, M. Barbero, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, Y. Chao, A. Chen, K. -F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorisek, H. C. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, S. U. Kataoka, N. Katayama, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, H. O. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lange, G. Leder, J. Lee, T. Lesiak, A. Limosani, S. -W. Lin, D. Liventsev, G. Majumder, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, E. Nakano, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, F. J. Ronga, M. Rozanska, Y. Sakai, T. R. Sarangi, N. Sato, T. Schietinger, O. Schneider, J. Schuemann, C. Schwanda, A. J. Schwartz, R. Seidl, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, N. Soni, R. Stamen, S. Stanic, M. Staric, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, J. Wicht, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Zurcher

    PHYSICAL REVIEW LETTERS   96 ( 22 )   221601-1 - 221601-5   2006年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the observation of the flavor-changing neutral current process b -&gt; d gamma using a sample of 386 x 10(6) B meson pairs accumulated by the Belle detector at the KEKB e(+)e(-) collider. We measure branching fractions for the exclusive modes B- -&gt; rho(-)gamma, (B) over bar (0) -&gt; rho(0)gamma, and (B) over bar (0) -&gt; omega gamma. Assuming that these three modes are related by isospin, we find B((B) over bar -&gt; (rho, omega)gamma) = (1.32(-0.31)(+0.34)(stat)(-0.09)(+0.10)(syst)) x 10(-6) with a significance of 5.1 sigma. This result is used to determine the ratio of Cabibbo-Kobayashi-Maskawa matrix elements vertical bar V-td/V-ts vertical bar to be 0.199(-0.025)(+0.026)(exp)(-0.015)(+0.018)(theor).

    DOI: 10.1103/PhysRevLett.96.221601

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  • Charge asymmetry of same-sign dileptons in B0-B̄0 mixing 査読

    Nakano E, Abe K, Abe K, Aihara H, Asano Y, Aushev T, Bakich A.M, Ban Y, Barberio E, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Browder T.E, Chen A, Chen W.T, Cheon B.G, Choi Y, Chuvikov A, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gershon T, Gokhroo G, Golob B, Hara T, Hastings N.C, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Kang J.H, Kang J.S, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kichimi H, Kim H.O, Kim S.K, Kim S.M, Korpar S, Kri?an P, Krokovny P, Kumar S, Kuo C.C, Kwon Y.-J, Lange J.S, Leder G, Lesiak T, Li J, Lin S.-W, Liventsev D, Majumder G, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Ozaki H, Palka H, Park H, Parslow N, Pestotnik R, Piilonen L.E, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Sevior M.E, Shibuya H, Sidorov V, Somov A, Stamen R, Stani? S, Stari? M, Sumisawa K, Suzuki S.Y, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian X.C, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Uno S, Urquijo P, Varvell K.E, Wang C.C, Wang C.H, Watanabe M, Xie Q.L, Yabsley B.D, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V, ?ontar D

    Physical Review D - Particles, Fields, Gravitation and Cosmology   73 ( 11 )   2006年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.73.112002

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    その他リンク: http://orcid.org/0000-0001-6373-2346

  • Measurement of branching fraction and direct CP asymmetry in B0→ρ0π0 decays 査読

    Dragic J, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Asano Y, Aushev T, Bahinipati S, Bakich A.M, Balagura V, Barbero M, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chang M.-C, Chang P, Chao Y, Chen A, Chen W.T, Cheon B.G, Chistov R, Choi Y, Choi Y.K, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Garmash A, Gershon T, Go A, Gokhroo G, Golob B, Goriek A, Ha H.C, Haba J, Hara T, Hastings N.C, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hoshi Y, Hou S, Hou W.-S, Hsiung Y, B, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Jacoby C, Kang J.H, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim H.J, Kim S.K, Kim S.M, Kinoshita K, Korpar S, Krian P, Krokovny P, Kulasiri R, Kuo C.C, Kusaka A, Kuzmin A, Kwon Y.-J, Leder G, Lee J, Lesiak T, Li J, Limosani A, Lin S.-W, Liventsev D, MacNaughton J, Mandl F, Marlow D, Matsumoto T, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Mori T, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Ostrowicz W, Ozaki H, Park C.W, Park H, Pestotnik R, Piilonen L.E, Rozanska M, Sakai Y, Sarangi T.R, Sato N, Satoyama N, Schietinger T, Schneider O, Sch{\"u}mann J, Schwanda C, Schwartz A.J, Seidl R, Senyo K, Sevior M.E, Shapkin M, Shibuya H, Shwartz B, Singh J.B, Sokolov A, Somov A, Soni N, Stamen R, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor G.N, Teramoto Y, Tian X.C, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Varner G, Villa S, Wang C.C, Wang C.H, Wang M.-Z, Watanabe Y, Wicht J, Won E, Xie Q.L, Yabsley B.D, Yamaguchi A, Yamauchi M, Ying J, Zhang C.C, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V, Z{\"u}rcher D

    Physical Review D - Particles, Fields, Gravitation and Cosmology   73 ( 11 )   2006年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.73.111105

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Measurement of forward-backward asymmetry and wilson coefficients in B -&gt; K(*)l(+)l(-) 査読

    A. Ishikawa, K. Abe, I. Adachi, H. Aihara, D. Anipko, Y. Asano, T. Aushev, A. M. Bakich, V. Balagura, M. Barbero, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, B. G. Cheon, Y. Choi, Y. K. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorisek, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, K. Inami, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Krizan, R. Kulasiri, R. Kumar, C. C. Kuo, Y. -J. Kwon, J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, C. W. Park, R. Pestotnik, L. E. Piilonen, M. Rozanska, Y. Sakai, N. Sato, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, A. Somov, N. Soni, R. Stamen, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M. -Z. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yusa, J. Zhang, L. M. Zhang, Z. P. Zhang

    PHYSICAL REVIEW LETTERS   96 ( 25 )   251801-1 - 251801-6   2006年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients A(9)/A(7) and A(10)/A(7) in B -&gt; K(*)l(+)l(-), where l represents an electron or a muon. We find evidence for the forward-backward asymmetry with a significance of 3.4 sigma. The results are obtained from a data sample containing 386x10(6) (B) over bar pairs that were collected on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

    DOI: 10.1103/PhysRevLett.96.251801

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  • Measurement of azimuthal asymmetries in inclusive production of hadron pairs in e(+)e(-) annihilation at Belle 査読

    R. Seidl, K. Hasuko, K. Abe, I. Adachi, H. Aihara, D. Anipko, Y. Asano, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, W. Bartel, A. Bay, U. Bitenc, I. Bizjak, S. Blyth, A. Bozek, M. Bracko, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, Y. Choi, Y. K. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, J. Dragic, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorisek, M. Grosse Perdekamp, H. C. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, S. M. Kim, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. S. Lange, J. Lee, T. Lesiak, J. Li, A. Limosani, S. -W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, A. Ogawa, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, T. Schietinger, O. Schneider, J. Schumann, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, A. Somov, N. Soni, R. Stamen, S. Stanic, M. Staric, K. Sumisawa, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Zurcher

    PHYSICAL REVIEW LETTERS   96 ( 23 )   232002-1 - 232002-6   2006年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMERICAN PHYSICAL SOC  

    The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e(+)e(-) annihilation at a center-of-mass energy of 10.52 GeV, which can be attributed to a transverse polarization of the primordial quarks. The measurement was performed using a sample of 79x10(6) hadronic events collected with the Belle detector.

    DOI: 10.1103/PhysRevLett.96.232002

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  • Measurement of phi(3) with a Dalitz plot analysis of B+-&gt;(DK(*)+)-K-(*) decay 査読

    A. Poluektov, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorisek, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, W. -S. Hou, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, K. Kinoshita, S. Korpar, P. Krizan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. -J. Kwon, J. Lee, T. Lesiak, J. Li, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, T. Nagamine, I. Nakamura, E. Nakano, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. R. Sarangi, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, A. J. Schwartz, R. Seidl, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, R. Stamen, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, S. Suzuki, S. Y. Suzuki, F. Takasaki, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Zuercher

    PHYSICAL REVIEW D   73 ( 11 )   112009-1 - 112009-16   2006年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the unitarity triangle angle phi(3) using a Dalitz plot analysis of the K-S(0)pi(+)pi(-) decay of the neutral D meson from the B-+/--&gt;(DK(*)+/-)-K-(*) process. The method exploits the interference between D-0 and (D) over bar (0) to extract the angle phi(3), strong phase delta and the ratio r of suppressed and allowed amplitudes. We apply this method to a 357 fb(-1) data sample collected by the Belle experiment. The analysis uses three modes: B+-&gt; DK+, B+-&gt;(DK+)-K-* with D-*-&gt; D pi(0), and B+-&gt; DK*+ with K*+-&gt; K-S(0)pi(+), as well as the corresponding charge-conjugate modes. From a combined maximum likelihood fit to the three modes, we obtain phi(3)=53 degrees(+15 degrees s)(-18 degrees)(stat)+/- 3 degrees(syst)+/- 9 degrees(model). The corresponding 2 standard deviation interval is 8 degrees &lt;phi(3)&lt; 111 degrees.

    DOI: 10.1103/PhysRevD.73.112009

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  • Measurement of the branching fraction, polarization, and CP asymmetry for B0→ρ+ρ- Decays, and determination of the cabibbo-kobayashi-maskawa phase 2 査読

    A. Somov, A. J. Schwartz, et. al, Belle Collaboation

    Physical Review Letters   96 ( 17 )   2006年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We have measured the branching fraction B, longitudinal polarization fraction fL, and CP asymmetry coefficients A and S for B0→ρ+ρ- decays with the Belle detector at the KEKB e+e- collider using 253fb-1 of data. We obtain B=[22.8±3.8(stat)-2.6+2.3(syst)]×10-6, fL=0.941-0.040+0.034(stat)±0.030(syst), A=0.00±0.30(stat) ±0.09(syst), and S=0.08±0.41(stat)±0.09(syst). These values are used to constrain the Cabibbo-Kobayashi-Maskawa phase 2; the solution consistent with the standard model is 2=(88±17)° or 59°&lt; 2&lt;115° at 90% C.L. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.96.171801

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  • Measurement of CP violation in B-0 -&gt; D*-pi(+) and B-0 -&gt; D-pi(+) decays 査読

    F. J. Ronga, T. R. Sarangi, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bracko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorisek, J. Haba, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y. -J. Kwon, G. Leder, J. Lee, T. Lesiak, J. Li, A. Limosani, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, T. Nagamine, I. Nakamura, E. Nakano, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, R. Stamen, S. Stanic, M. Staric, H. Stoeck, K. Sumisawa, S. Suzuki, S. Y. Suzuki, F. Takasaki, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Zuercher

    PHYSICAL REVIEW D   73 ( 9 )   092003-1 - 092003-17   2006年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report measurements of time-dependent decay rates for B-0 -&gt; D(*)-pi(+) decays and extraction of CP violation parameters that depend on phi(3). Using fully reconstructed D-(*)pi events and partially reconstructed D-*pi events from a data sample that contains 386x10(6) B (B) over bar pairs that was collected near the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider, we obtain the CP violation parameters S+(D-(*)pi) and S-(D-(*)pi). We obtain S+(D-*pi)=0.049 +/- 0.020(stat)+/- 0.011(sys), S-(D-*pi)=0.031 +/- 0.019(stat)+/- 0.011(sys), and S+(D pi)=0.031 +/- 0.030(stat)+/- 0.012(sys), S-(D pi)=0.068 +/- 0.029(stat)+/- 0.012(sys). These results are an indication of CP violation in B-0 -&gt; D*-pi(+) and B-0 -&gt; D-pi(+) decays at the 2.5 sigma and 2.2 sigma levels, respectively. If we use the values of R-D((*))pi that are derived using assumptions of factorization and SU(3) symmetry, branching fraction measurements for the B -&gt; D-s((*))pi modes, and lattice QCD calculations, we can restrict the allowed region of \sin(2 phi(1)+phi(3)\ to be above 0.44 and 0.52 at 68% confidence level from the D-*pi and D pi modes, respectively.

    DOI: 10.1103/PhysRevD.73.092003

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  • Search for the decay B0→γγ 査読

    Villa S, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Bahinipati S, Bakich A.M, Balagura V, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Bondar A, Bozek A, Bra?ko M, Browder T.E, Chao Y, Chen A, Chen W.T, Cheon B.G, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Haba J, Hara T, Hayasaka K, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Ikado K, Imoto A, Inami K, Itoh R, Iwasaki M, Iwasaki Y, Jacoby C, Kang J.H, Kapusta P, Kawasaki T, Khan H.R, Kichimi H, Kim S.K, Kim S.M, Kinoshita K, Korpar S, Krokovny P, Kulasiri R, Kuo C.C, Kuzmin A, Kwon Y.-J, Leder G, Lesiak T, Lin S.-W, Liventsev D, Matsumoto T, Mitaroff W, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Nakamura I, Nakano E, Nakao M, Natkaniec Z, Nishida S, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Ozaki H, Palka H, Park C.W, Park K.S, Pestotnik R, Piilonen L.E, Sakai Y, Sato N, Satoyama N, Schietinger T, Schneider O, Schwanda C, Seidl R, Senyo K, Sevior M.E, Shapkin M, Shibuya H, Somov A, Soni N, Stamen R, Stani? S, Stari? M, Sumiyoshi T, Tamai K, Tamura N, Tanaka M, Taylor G.N, Teramoto Y, Tian X.C, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell K.E, Wang C.C, Wang C.H, Watanabe Y, Wicht J, Won E, Xie Q.L, Yabsley B.D, Yamaguchi A, Yamauchi M, Ying J, Zhang L.M, Zhang Z.P, Z{\"u}rcher D

    Physical Review D - Particles, Fields, Gravitation and Cosmology   73 ( 5 )   2006年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.73.051107

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Measurement of branching fractions for B -&gt; X c1(2) K (K*) at Belle 査読

    T Soni, K Abe, K Abe, Adachi, I, H Aihara, K Arinstein, Y Asano, Aulchenko, V, T Aushev, AM Bakich, EB Barberio, Bedny, I, U Bitenc, Bizjak, I, S Blyth, A Bondar, M Bracko, TE Browder, P Chang, Y Chao, A Chen, KF Chen, BG Cheon, R Chistov, SK Choi, Y Choi, A Chuvikov, J Dalseno, M Danilov, M Dash, LY Dong, S Eidelman, Y Enari, D Epifanov, S Fratina, N Gabyshev, A Garmash, T Gershon, A Go, G Gokhroo, B Golob, A Gorisek, J Haba, T Hara, K Hayasaka, H Hayashii, M Hazumi, L Hinz, Hokuue, I, Y Hoshi, S Hou, WS Hou, T Iijima, K Ikado, A Imoto, K Inami, A Ishikawa, R Itoh, JH Kang, JS Kang, P Kapusta, N Katayama, T Kawasaki, HR Khan, H Kichimi, HJ Kim, SM Kim, S Korpar, P Krizan, P Krokovny, R Kulasiri, CC Kuo, A Kuzmin, YJ Kwon, T Lesiak, SW Lin, D Liventsev, G Majumder, F Mandl, T Matsumoto, Y Mikami, W Mitaroff, K Miyabayashi, Z Natkaniec, S Nishida, O Nitoh, S Ogawa, T Ohshima, T Okabe, S Okuno, SL Olsen, Y Onuki, W Ostrowicz, H Ozaki, P Pakhlov, CW Park, R Pestotniki, M Peters, LE Piilonen, A Poluektov, Y Sakai, N Sato, T Schietinger, O Schneider, ME Sevior, H Shibuya, B Shwartz, Sidorov, V, JB Singh, A Somov, S Stanic, M Staric, T Sumiyoshi, S Suzuki, SY Suzuki, R Takasaki, K Tamai, N Tamura, M Tanaka, GN Taylor, Y Teramoto, XC Tian, T Tsuboyama, T Tsukamoto, S Uehara, K Ueno, T Uglov, S Uno, R Urquijo, G Varner, S Villa, CC Wang, CH Wang, Y Watanabe, E Won, QL Xie, A Yamaguchi, Y Yamashita, M Yamauchi, J Ying, Y Yuan, CC Zhang, LM Zhang, ZP Zhang, Zhilich, V

    PHYSICS LETTERS B   634 ( 2-3 )   155 - 164   2006年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We have measured the branching fractions for the exclusive decay modes B -&gt; chi(c1(2)) K(K*) using a 140 fb(-1) data sample collected by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured branching fractions for B+ -&gt; chi(c1) K+, B-0, chi(c1) K-0, B-0 -&gt; chi(c1) K*(0) and B+ -&gt; chi(c1) K*(+) decay modes are (4.5 +/- 0.2 +/- 0.5) x 10(-4), (3.5 +/- 0.3 +/- 0.5) x 10(-4), (3.1 +/- 0.3 +/- 0.7) x 10(-4) and (4.1 +/- 0.6 +/- 0.9) x 10(-4), respectively, where the first error is statistical and the second error is systematic. We do not observe statistically significant signals for the B -&gt; chi(c2) K(K*) decay modes and set upper limits at the 90% confidence level. We also study the helicity distribution for B -&gt; chi(c1) K* decay mode and show that the longitudinal polarization component is dominant. (c) 2006 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2006.01.013

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  • Charm hadrons from fragmentation and B decays in e(+)e(-) annihilation at root s=10.6 GeV 査読

    R Seuster, K Abe, H Aihara, Y Asano, T Aushev, AM Bakich, M Barbero, Bedny, I, U Bitenc, Bizjak, I, A Bozek, M Bracko, J Brodzicka, A Chen, BG Cheon, Y Choi, A Chuvikov, S Cole, J Dalseno, M Danilov, M Dash, LY Dong, J Dragic, A Drutskoy, S Eidelman, F Fang, T Gershon, A Go, G Gokhroo, B Golob, A Gorisek, K Hayasaka, M Hazumi, Y Hoshi, S Hou, WS Hou, T Iijima, K Ikado, R Itoh, Y Iwasaki, JH Kang, JS Kang, P Kapusta, N Katayama, H Kawai, T Kawasaki, HR Khan, H Kichimi, HJ Kim, SM Kim, P Krizan, P Krokovny, R Kulasiri, CC Kuo, A Kuzmin, YJ Kwon, JS Lange, T Lesiak, J Li, SW Lin, F Mandl, W Mitaroff, H Miyake, Y Miyazaki, R Mizuk, T Nagamine, Y Nagasaka, E Nakano, M Nakao, S Nishida, O Nitoh, S Ogawa, T Ohshima, T Okabe, S Okuno, SL Olsen, Y Onuki, H Ozaki, P Pakhlov, H Palka, CW Park, H Park, KS Park, R Pestotnik, LE Piilonen, Y Sakai, N Sato, T Schietinger, O Schneider, J Schumann, C Schwanda, ME Sevior, H Shibuya, Sidorov, V, A Somov, N Soni, R Stamen, S Stanic, M Staric, SY Suzuki, F Takasaki, K Tamai, N Tamura, M Tanaka, GN Taylor, Y Teramoto, XC Tian, S Uehara, T Uglov, K Ueno, S Uno, P Urquijo, G Varner, CC Wang, CH Wang, MZ Wang, QL Xie, BD Yabsley, A Yamaguchi, Y Yamashita, M Yamauchi, J Ying, Y Yusa, LM Zhang, ZP Zhang, Zhilich, V

    PHYSICAL REVIEW D   73 ( 3 )   2006年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present an analysis of charm quark fragmentation at 10.6 GeV, based on a data sample of 103 fb(-1) collected by the Belle detector at the KEKB accelerator. We consider fragmentation into the main charmed hadron ground states, namely D-0,D+,D-s(+) and Lambda(c)(+), as well as the excited states D-*0 and D*+. The fragmentation functions are important to measure as they describe processes at a low energy scale, where calculations in perturbation theory lead to large uncertainties. Fragmentation functions can also be used as input distributions for Monte Carlo generators. Additionally, we determine the average number of these charmed hadrons produced per B decay at the Upsilon(4S) resonance and measure the distribution of their production angle in e(+)e(-) annihilation events and in B decays.

    DOI: 10.1103/PhysRevD.73.032002

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    その他リンク: http://orcid.org/0000-0001-6373-2346

  • Search for the Theta(1540)(+) pentaquark using kaon secondary interactions at Belle 査読

    R Mizuk, M Danilov, K Abe, K Abe, Adachi, I, H Aihara, Y Asano, T Aushev, S Bahinipati, AM Bakich, Balagura, V, S Banerjee, E Barberio, M Barbero, A Bay, Bedny, I, U Bitenc, Bizjak, I, S Blyth, A Bondar, A Bozek, M Bracko, J Brodzicka, TE Browder, P Chang, Y Chao, A Chen, KF Chen, WT Chen, BG Cheon, R Chistov, SK Choi, Y Choi, A Chuvikov, J Dalseno, M Dash, LY Dong, A Drutskoy, S Eidelman, Y Enari, S Fratina, N Gabyshev, A Garmash, T Gershon, G Gokhroo, B Golob, A Gorisek, J Haba, T Hara, NC Hastings, K Hayasaka, H Hayashii, M Hazumi, T Hokuue, Y Hoshi, S Hou, WS Hou, T Iijima, K Ikado, A Imoto, A Ishikawa, R Itoh, Y Iwasaki, JH Kang, JS Kang, P Kapusta, N Katayama, H Kawai, T Kawasaki, HR Khan, H Kichimi, HJ Kim, JH Kim, SK Kim, SM Kim, S Korpar, P Krizan, P Krokovny, R Kulasiri, CC Kuo, A Kuzmin, YJ Kwon, JS Lange, SE Lee, T Lesiak, J Li, SW Lin, D Liventsev, J MacNaughton, G Majumder, F Mandl, T Matsumoto, A Matyja, Y Mikami, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, Y Miyazaki, GR Moloney, Y Nagasaka, E Nakano, M Nakao, H Nakazawa, Z Natkaniec, S Nishida, O Nitoh, S Noguchi, T Nozaki, S Ogawa, T Ohshima, T Okabe, S Okuno, SL Olsen, Y Onuki, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, CW Park, N Parslow, LS Peak, R Pestotnik, LE Piilonen, Y Sakai, N Sato, N Satoyama, K Sayeed, T Schietinger, O Schneider, AJ Schwartz, ME Sevior, H Shibuya, Sidorov, V, JB Singh, A Somov, S Stanic, M Staric, K Sumisawa, T Sumiyoshi, F Takasaki, K Tamai, N Tamura, M Tanaka, GN Taylor, Y Teramoto, XC Tian, K Trabelsi, T Tsuboyama, T Tsukamoto, S Uehara, K Ueno, T Uglov, Y Unno, S Uno, P Urquijo, Y Ushiroda, G Varner, KE Varvell, S Villa, CC Wang, CH Wang, MZ Wang, Y Watanabe, E Won, QL Xie, BD Yabsley, A Yamaguchi, Y Yamashita, M Yamauchi, J Ying, SL Zang, J Zhang, LM Zhang, ZP Zhang, Zhilich, V, D Zurcher

    PHYSICS LETTERS B   632 ( 2-3 )   173 - 180   2006年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    Using kaon secondary interactions in the material of the Belle detector, we search for both inclusive and exclusive production of the Theta(1540)(+). We set an upper limit of 2.5% at the 90% C.L. on the ratio of the e(1540)+ to A(1520) inclusive production cross sections. We also search for the Theta(1540)(+) as an intermediate resonance in the charge exchange reaction K(+)n -&gt; pK(S)(0). We set an upper limit of Gamma(Theta+) &lt; 0.64 MeV at the 90% C.L. for m(Theta+) = 1.539 MeV/c(2). These results are obtained from a 397 fb(-1) data sample collected with the Belle detector near the Y(4S) resonance, at the KEKB asymmetric energy e(+)e(-) collider. (c) 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.10.077

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  • Search for lepton and baryon number violating tau(-) decays into (Lambda)over-bar-pi(-) and Lambda pi(-) 査読

    Y Miyazaki, K Abe, K Abe, Adachi, I, H Aihara, K Arinstein, Y Asano, Aulchenko, V, T Aushev, S Bahinipati, AM Bakich, Balagura, V, E Barberio, Bedny, I, U Bitenc, Bizjak, I, S Blyth, A Bondar, A Bozek, M Bracko, J Brodzicka, TE Browder, P Chang, Y Chao, A Chen, KF Chen, WT Chen, BG Cheon, R Chistov, Y Choi, A Chuvikov, S Cole, J Dalseno, M Danilov, M Dash, L Dong, A Drutskoy, S Eidelman, Y Enari, D Epifanov, S Fratina, N Gabyshev, A Garmash, T Gershon, A Go, G Gokhroo, B Golob, A Gorisek, HC Ha, K Hayasaka, H Hayashii, M Hazumi, T Hokuue, Y Hoshi, S Hou, WS Hou, T Iijima, K Ikado, A Imoto, K Inami, A Ishikawa, R Itoh, Y Iwasaki, JH Kang, JS Kang, P Kapusta, N Katayama, H Kawai, T Kawasaki, HR Khan, H Kichimi, HJ Kim, JH Kim, SK Kim, SM Kim, S Korpar, P Krizan, P Krokovny, R Kulasiri, CC Kuo, A Kuzmin, YJ Kwon, G Leder, SE Lee, T Lesiak, SW Lin, D Liventsev, G Majumder, F Mandl, T Matsumoto, A Matyja, Y Mikami, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, GR Moloney, T Nagamine, Y Nagasaka, E Nakano, M Nakao, H Nakazawa, Z Natkaniec, S Nishida, O Nitoh, S Ogawa, T Ohshima, T Okabe, S Okuno, SL Olsen, Y Onuki, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, CW Park, N Parslow, R Pestotnik, LE Piilonen, A Poluektov, N Root, M Rozanska, Y Sakai, N Sato, N Satoyama, K Sayeed, T Schietinger, O Schneider, ME Sevior, H Shibuya, B Shwartz, Sidorov, V, A Somov, S Stanic, M Staric, K Sumisawa, T Sumiyoshi, SY Suzuki, O Tajima, F Takasaki, K Tamai, M Tanaka, GN Taylor, Y Teramoto, XC Tian, T Tsuboyama, T Tsukamoto, S Uehara, T Uglov, S Uno, P Urquijo, G Varner, S Villa, CC Wang, CH Wang, Y Watanabe, E Won, QL Xie, A Yamaguchi, Y Yamashita, M Yamauchi, J Ying, J Zhang, LM Zhang, ZP Zhang, Zhilich, V, D Zurcher

    PHYSICS LETTERS B   632 ( 1 )   51 - 57   2006年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We have searched for tau lepton decays, tau(-) -&gt; Lambda($) over bar pi(-) and tau -&gt; Lambda pi(-), that simultaneously violate the conservation of the lepton (L) and baryon (B) number using a data sample of 154 fb(-1) collected with the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider. No evidence for a signal was found in either of the decay modes and we set the following upper limits for the branching fractions: B(tau(-) -&gt; Lambda($) over bar pi(-)) &lt; 1.4 x 10(-7) and B(tau(-) -&gt; Lambda($) over bar pi(-)) &lt; 0.72 x 10(-7) at the 90% confidence level. This is the first search ever performed for these modes. (c) 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.10.024

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  • Observation of B+→Ξ̄c0Λc+ and evidence for B0→Ξ̄c-Λc+ 査読

    R. Chistov, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, S. K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, B. Golob, A. Gorišek, H. C. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Ishikawa, M. Iwasaki, Y. Iwasaki, P. Kapusta, N. Katayama, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y. J. Kwon, G. Leder, T. Lesiak, S. W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, J. Mueller, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Sato, N. Satoyama, T. Schietinger, O. Schneider, K. Senyo, M. E. Sevior, B. Shwartz, V. Sidorov, A. Somov, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. Z. Wang, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich

    Physical Review D - Particles, Fields, Gravitation and Cosmology   74 ( 11 )   2006年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We report the first observation of the decay B+→Ξ̄c0Λc+ with a significance of 8.7σ and evidence for the decay B0→Ξ̄c-Λc+ with a significance of 3.8σ. The product B(B+→Ξ̄c0Λc+)×B(Ξ̄c0→Ξ̄+π-) is measured to be (4.8-0.9+1.0±1.1±1.2)×10-5, and B(B0→Ξ̄c-Λc+)×B(Ξ̄c-→Ξ̄+π- π-) is measured to be (9.3-2.8+3.7±1.9±2.4)×10-5. The errors are statistical, systematic and the error of the Λc+→pK-π+ branching fraction, respectively. The decay B+→Ξ̄c0Λc+ is the first example of a two-body exclusive B+ decay into two charmed baryons. The data used for this analysis was accumulated at the Υ(4S) resonance, using the Belle detector at the e+e- asymmetric-energy collider KEKB. The integrated luminosity of the data sample is equal to 357fb-1, corresponding to 386×106 BB̄ pairs. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.74.111105

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  • Search for the decay B0→γγ 査読

    S. Villa, K. Abe, K. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, K. Ikado, A. Imoto, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, C. Jacoby, J. H. Kang, P. Kapusta, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y. J. Kwon, G. Leder, T. Lesiak, S. W. Lin, D. Liventsev, T. Matsumoto, W. Mitaroff, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, H. Palka, C. W. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, Y. Watanabe, J. Wicht, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, M. Yamauchi, J. Ying, L. M. Zhang, Z. P. Zhang, D. Zürcher

    Physical Review D - Particles, Fields, Gravitation and Cosmology   73 ( 5 )   2006年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    The rare decay B0→γγ is searched for in 104fb-1 of data, corresponding to 111×106BB̄ pairs, collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No evidence for the signal is found, and an upper limit of 6.2×10-7 at 90% confidence level is set for the corresponding branching fraction. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.73.051107

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  • Improved measurements of color-suppressed decays B̄0→D0π0, D0η, D0ω, D*0π0, D*0η and D*0ω 査読

    S. Blyth, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M. C. Chang, Y. Chao, A. Chen, K. F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, H. O. Kim, Y. J. Kim, S. Korpar, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, G. Leder, J. Lee, S. W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, R. Seidl, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, S. Suzuki, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. Z. Wang, Y. Watanabe, E. Won, C. H. Wu, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang

    Physical Review D - Particles, Fields, Gravitation and Cosmology   74 ( 9 )   2006年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We present improved measurements of the branching fractions of the color-suppressed decays B̄0→D(*)0h0, where h0 represents a light neutral meson π0, η or ω. The measurements are based on a data sample of 140fb-1 collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider, corresponding to 7 times the luminosity of the previous Belle measurements. All the measured branching fractions fall in the range 1.4-2.4×10-4, which is significantly higher than theoretical predictions based on naive factorization. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.74.092002

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  • Evidence for Large Direct CP Violation in B±→ρ(770)0K± from Analysis of Three-Body Charmless B±→K±π±π± Decays

    Garmash A., Abe K., Abe K., Adachi I., Aihara H., Asano Y., Aushev T., Aziz T., Bahinipati S., Bakich A. M., Barbero M., Choi Y., Choi Y. K., Ha H. C., Gershon T., Kinoshita K., Chuvikov A., Dalseno J., Drutskoy A., Eidelman S., Go A., Matsumoto T., Gokhroo G., Hastings N. C., Miyake H., Križan P., Hayasaka K., Hayashii H., Nakao M., Kawasaki T., Hazumi M., Hokuue T., Matyja A., Okabe T., Korpar S., Hoshi Y., Hou S., Okuno S., Miyata H., Hou W. -S., Hsiung Y. B., Iijima T., Imoto A., Olsen S. L., Khan H. R., Natkaniec Z., Inami K., Ishikawa A., Iwasaki Y., Kapusta P., Kichimi H., Kim S. K., Krokovny P., Seidl R., Nitoh O., Kulasiri R., Kuo C. C., Singh J. B., Park C. W., Kuzmin A., Kwon Y. -J., Suzuki S., Nishida S., Lee S. E., Lesiak T., Suzuki S. Y., Sevior M. E., Limosani A., Ozaki H., Lin S. -W., Liventsev D., Miyazaki Y., Somov A., Mandl F., Marlow D., Mitaroff W., Miyabayashi K., Nagamine T., Nakano E., Noguchi S., Varner G., Ohshima T., Park H., Wang M. -Z., Tamai K., Park K. S., Peak L. S., Yamauchi M., Stamen R., Pestotnik R., Piilonen L. E., Varvell K. E., Bedny I., Takasaki F., Rozanska M., Sakai Y., Bitenc U., Watanabe Y., Satoyama N., Schietinger T., Schneider O., Schümann J., Bizjak I., Stanič S., Yang Heyoung, Schwanda C., Schwartz A. J., Shibuya H., Shwartz B., Starič M., Sumiyoshi T., Tamura N., Danilov M., Zhang Z. P., Tanaka M., Taylor G. N., Epifanov D., Bozek A., Teramoto Y., Tian X. C., Golob B., Zhang L. M., Trabelsi K., Tsuboyama T., Gorišek A., Dash M., Tsukamoto T., Bondar A., Uehara S., Uglov T., Won E., Fratina S., Uno S., Urquijo P., Villa S., Wang C. H., Xie Q. L., Yamaguchi A., Zhilich V., Itoh R., Zürcher D., Bračko M., Katayama N., Hasegawa Y., Brodzicka J., Browder T. E., Kim S. M., Gabyshev N., Chang P., Chao Y., Iwasaki M., Chen A., Hara T., Chen K. -F., Chen W. T., Dragic J., Kawai H., Cheon B. G., Chistov R.

    PHYSICAL REVIEW LETTERS   96 ( 251803 )   1 - 6   2006年

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    記述言語:英語   出版者・発行元:The American Physical Society  

    DOI: 10.1103/PhysRevLett.96.251803

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  • Search for D0-D̄0 mixing using semileptonic decays at Belle 査読

    Bitenc U, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Bahinipati S, Banerjee S, Barberio E, Barbero M, Bedny I, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chao Y, Chen A, Chen W.T, Cheon B.G, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dong L.Y, Dragic J, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gori?ek A, Haba J, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Iijima T, Ikado K, Imoto A, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Kapusta P, Kataoka S, U, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kichimi H, Kim J.H, Kim S.M, Kinoshita K, Korpar S, Kri?an P, Krokovny P, Kuo C.C, Kwon Y.-J, Lange J.S, Leder G, Lee S.E, Lesiak T, Li J, Liventsev D, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Moloney G.R, Nagamine T, Nagasaka Y, Nakano E, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Onuki Y, Ostrowicz W, Pakhlov P, Palka H, Park C.W, Parslow N, Pestotnik R, Piilonen L.E, Sakai Y, Satoyama N, Sayeed K, Schietinger T, Schneider O, Schwartz A.J, Sevior M.E, Shibuya H, Shwartz B, Sidorov V, Somov A, Soni N, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian X.C, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Varner G, Villa S, Wang C.H, Wang M.-Z, Watanabe Y, Won E, Xie Q.L, Yabsley B.D, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zang S.L, Zhang C.C, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V

    Physical Review D - Particles, Fields, Gravitation and Cosmology   72 ( 7 )   2005年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.72.071101

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  • Time-dependent C P violation effects in partially reconstructed B <sup>0</sup> → D*<sup>∓</sup>π<sup>±</sup> decays 査読

    Gershon T, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Bahinipati S, Bakich A.M, Banerjee S, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chang M.-C, Chang P, Chao Y, Chen A, Chen W.T, Cheon B.G, Choi S.-K, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Eidelman S, Fratina S, Gabyshev N, Garmash A, Gokhroo G, Golob B, Gori?ek A, Haba J, Hara K, Hastings N.C, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kent N, Khan H.R, Kichimi H, Kim H.J, Kim S.M, Kinoshita K, Krokovny P, Kumar S, Kuo C.C, Kuzmin A, Kwon Y.-J, Leder G, Lesiak T, Li J, Limosani A, Lin S.-W, Liventsev D, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsumoto T, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mohapatra D, Moloney G.R, Nagamine T, Nakano E, Nakao M, Nakazawa H, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Ostrowicz W, Pakhlov P, Palka H, Park C.W, Parslow N, Peak L.S, Pestotnik R, Piilonen L.E, Poluektov A, Ronga F.J, Sagawa H, Sakai Y, Sarangi T.R, Sato N, Schietinger T, Schneider O, Schwanda C, Schwartz A.J, Senyo K, Sevior M.E, Shibata T, Shibuya H, Singh J.B, Somov A, Stamen R, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian X.C, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Uno S, Urquijo P, Ushiroda Y, Varner G, Varvell K.E, Villa S, Wang C.C, Wang C.H, Watanabe M, Xie Q.L, Yabsley B.D, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yang H, Ying J, Zhang J, Zhang L.M, Zhang Z.P, ontar D

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   624 ( 1-2 )   11 - 21   2005年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.physletb.2005.07.020

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  • Measurement of the branching fractions for B-→D(*)+π-+ -ν̄ and B0̄→D(*)0π+ -ν̄ and B 査読

    Liventsev D, Matsumoto T, Abe K, Abe K, Aihara H, Asano Y, Aushev T, Bakich A.M, Balagura V, Barbero M, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bra?ko M, Browder T.E, Chao Y, Chen A, Chen W.T, Cheon B.G, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Dash M, Dong L.Y, Eidelman S, Enari Y, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Iijima T, Ikado K, Imoto A, Ishikawa A, Itoh R, Iwasaki M, Kang J.H, Kang J.S, Kataoka S, U, Kawasaki T, Khan H.R, Kichimi H, Kim S.M, Kinoshita K, Kri?an P, Krokovny P, Kuo C.C, Kuzmin A, Kwon Y.-J, Lesiak T, Lin S.-W, Mandl F, Matyja A, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park C.W, Parslow N, Pestotnik R, Piilonen L.E, Ronga F.J, Rozanska M, Sakai Y, Sato N, Satoyama N, Sayeed K, Schietinger T, Schneider O, Schwanda C, Shibuya H, Shwartz B, Somov A, Soni N, Stani? S, Stari? M, Sumiyoshi T, Suzuki S.Y, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian X.C, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Varner G, Varvell K.E, Villa S, Wang C.H, Wang M.-Z, Watanabe Y, Won E, Xie Q.L, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zhang L.M, Zhang Z.P, Zhilich V

    Physical Review D - Particles, Fields, Gravitation and Cosmology   72 ( 5 )   2005年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.72.051109

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  • Observation of B-→J/ψΛp̄ and searches for B-→J/ψΣ0p̄ and B0→J/ψpp̄ decays 査読

    Xie Q.L, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Bahinipati S, Bakich A.M, Barberio E, Barbero M, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chao Y, Chen A, Chen W.T, Cheon B.G, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dong L.Y, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gori?ek A, Haba J, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Hsiung Y, B, Iijima T, Ikado K, Imoto A, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Kapusta P, Kataoka S, U, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kichimi H, Kim J.H, Kim S.M, Kinoshita K, Krokovny P, Kuo C.C, Kwon Y.-J, Leder G, Lee S.E, Lesiak T, Li J, Liventsev D, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney G.R, Nagamine T, Nagasaka Y, Nakano E, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park C.W, Parslow N, Pestotnik R, Piilonen L.E, Sakai Y, Satoyama N, Sayeed K, Schneider O, Sevior M.E, Shibuya H, Shwartz B, Sidorov V, Somov A, Soni N, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Takasaki F, Tamai K, Tanaka M, Teramoto Y, Tian X.C, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Unno Y, Uno S, Urquijo P, Varner G, Varvell K.E, Villa S, Wang C.H, Wang M.-Z, Watanabe Y, Won E, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Yuan Y, Zang S.L, Zhang C.C, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V, Ziegler T

    Physical Review D - Particles, Fields, Gravitation and Cosmology   72 ( 5 )   2005年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.72.051105

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  • Search for lepton flavor violating decays tau(-) -&gt; l(-) pi(0), l (-) eta, l(-) eta ' 査読

    Y Enari, N Sato, K Abe, K Abe, H Aihara, Y Asano, Aulchenko, V, S Bahinipati, AM Bakich, Bedny, I, U Bitenc, Bizjak, I, S Blyth, A Bondar, A Bozek, M Bracko, J Brodzicka, MC Chang, Y Chao, A Chen, WT Chen, BG Cheon, R Chistov, Y Choi, A Chuvikov, J Dalseno, M Dash, A Drutskoy, S Eidelman, D Epifanov, F Fang, S Fratina, N Gabyshev, T Gershon, G Gokhroo, B Golob, A Gorisek, J Haba, K Hayasaka, H Hayashii, M Hazumi, L Hinz, T Hokuue, Y Hoshi, S Hou, WS Hou, T Iijima, A Imoto, K Inami, A Ishikawa, R Itoh, M Iwasaki, Y Iwasaki, JH Kang, JS Kang, P Kapusta, N Katayama, H Kawai, T Kawasaki, HR Khan, H Kichimi, HJ Kim, SM Kim, S Korpar, P Krokovny, S Kumar, CC Kuo, A Kuzmin, YJ Kwon, G Leder, SE Lee, T Lesiak, J Li, SW Lin, D Liventsev, F Mandl, T Matsumoto, Y Mikami, W Mitaroff, H Miyake, H Miyata, R Mizuk, GR Moloney, T Nagamine, Y Nagasaka, E Nakano, M Nakao, H Nakazawa, Z Natkaniec, S Nishida, O Nitoh, S Ogawa, T Ohshima, T Okabe, S Okuno, SL Olsen, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, CW Park, N Parslow, LS Peak, LE Piilonen, N Root, H Sagawa, Y Sakai, T Schietinger, O Schneider, P Schonmeier, J Schumann, K Senyo, ME Sevior, T Shibata, H Shibuya, B Shwartz, JB Singh, A Somov, N Soni, R Stamen, S Stanic, M Staric, K Sumisawa, T Sumiyoshi, O Tajima, F Takasaki, K Tamai, N Tamura, M Tanaka, Y Teramoto, XC Tian, T Tsukamoto, S Uehara, K Ueno, T Uglov, S Uno, P Urquijo, Y Ushiroda, G Varner, S Villa, CC Wang, CH Wang, M Watanabe, QL Xie, BD Yabsley, A Yamaguchi, Y Yamashita, M Yamauchi, H Yang, J Ying, J Zhang, LM Zhang, ZP Zhang, Zhilich, V, D Zontar

    PHYSICS LETTERS B   622 ( 3-4 )   218 - 228   2005年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We have searched for lepton flavor violating semileptonic tau(-) decays using a data sample of 153.8 fb(-1) accumulated with the Belle detector at the KEKB e(+)e(-) collider. For the six decay modes studied, the observed yield is compatible with the estimated background and the following upper limits are set at the 90% confidence level: B(tau(-) -&gt; e(-)eta) &lt; 2.3 x 10(-7), B(tau(-) -&gt; mu(-)eta) &lt; 1.5 x 10(-7), B(tau(-) -&gt; e(-)pi(0)) &lt; 1.9 x 10(-7), B(tau(-) -&gt; mu(-)pi(0)) &lt; 4.1 x 10(-7), B(tau(-) -&gt; e(-)eta(1)) &lt; 10 x 10(-7), and B(tau(-) -&gt; mu(-)eta(1)) &lt; 4.7 x 10(-7). These results are 10 to 64 times more restrictive than previous limits. (c) 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.07.021

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  • Observation of B+→pΛ̄γ 査読

    Lee Y.-J, Wang M.-Z, Abe K, Abe K, Aihara H, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich A.M, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chang M.-C, Chang P, Chao Y, Chen A, Chen K.-F, Chen W.T, Cheon B.G, Chistov R, Choi S.-K, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Gori?ek A, Haba J, Hayasaka K, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Hsiung Y, B, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kichimi H, Kim H.J, Kim S.K, Kim S.M, Kinoshita K, Korpar S, Kri?an P, Krokovny P, Kumar S, Kuo C.C, Kuzmin A, Kwon Y.-J, Leder G, Lee S.E, Lesiak T, Li J, Lin S.-W, Liventsev D, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Mizuk R, Moloney G.R, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Olsen S.L, Ostrowicz W, Ozaki H, Palka H, Park C.W, Parslow N, Peak L.S, Pestotnik R, Piilonen L.E, Root N, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Sch{\"u}mann J, Senyo K, Sevior M.E, Shibata T, Shibuya H, Shwartz B, Sidorov V, Singh J.B, Somov A, Stamen R, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian X.C, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell K.E, Villa S, Wang C.C, Wang C.H, Watanabe M, Xie Q.L, Yamaguchi A, Yamashita Y, Yamauchi M, Yang H, Ying J, Zhang C.C, Zhang L.M, Zhang Z.P, Zhilich V, ?ontar D, Z{\"u}rcher D

    Physical Review Letters   95 ( 6 )   2005年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.95.061802

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  • Measurement of γγ → pp̄ production at Belle 査読

    Kuo C.C, Abe K, Adachi I, Aihara H, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich A.M, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Chang M.-C, Chang P, Chen A, Chen W.T, Cheon B.G, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Gori?ek A, Haba J, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Kang J.H, Kang J.S, Kapusta P, Kawai H, Kawasaki T, Khan H.R, Kichimi H, Kim H.J, Kim S.M, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon Y.-J, Leder G, Lesiak T, Lin S.-W, Liventsev D, MacNaughton J, Majumder G, Mand F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Mizuk R, Moloney G.R, Mori T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Ostrowicz W, Palka H, Park H, Peak L.S, Pestotnik R, Piilonen L.E, Poluektov A, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Senyo K, Sevior M.E, Shibuya H, Shwartz B, Singh J.B, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sugiyama A, Sumiyoshi T, Suzuki S.Y, Tajima O, Takasaki F, Tamai K, Tamura N, Taylor G.N, Teramoto Y, Tian X.C, Tsukamoto T, Uehara S, Ueno K, Uglov T, Uno S, Varner G, Villa S, Wang C.C, Wang C.H, Watanabe M, Xie Q.L, Yabsley B.D, Yamaguchi A, Yamashita Y, Yamauchi M, Yang H, Ying J, Zhang L.M, Zhang Z.P, Zhilich V, ?ontar D, Z{\"u}rcher D

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   621 ( 1-2 )   41 - 55   2005年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.physletb.2005.06.036

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  • Measurement of broken vertical bar V-ub vertical bar near the endpoint of the electron momentum spectrum from semileptonic B-meson decays 査読

    A Limosani, K Abe, K Abe, Adachi, I, H Aihara, Y Asano, T Aushev, S Bahinipati, AM Bakich, E Barberio, U Bitenc, Bizjak, I, S Blyth, A Bondar, A Bozek, M Bracko, J Brodzicka, TE Browder, Y Chao, A Chen, KF Chen, WT Chen, BG Cheon, R Chistov, Y Choi, A Chuvikov, S Cole, J Dalseno, M Danilov, M Dash, J Dragic, A Drutskoy, S Eidelman, S Fratina, N Gabyshev, T Gershon, G Gokhroo, B Golob, A Gorisek, T Hara, NC Hastings, K Hayasaka, H Hayashii, M Hazumi, L Hinz, T Hokuue, Y Hoshi, S Hou, WS Hou, T Iijima, A Imoto, K Inami, A Ishikawa, R Itoh, M Iwasaki, Y Iwasaki, JH Kang, JS Kang, N Katayama, H Kawai, T Kawasaki, HR Khan, H Kichimi, HJ Kim, HO Kim, SM Kim, K Kinoshita, S Korpar, P Krokovny, R Kulasiri, S Kumar, CC Kuo, YJ Kwon, JS Lange, G Leder, T Lesiak, J Li, SW Lin, D Liventsev, J MacNaughton, G Majumder, F Mandl, T Matsumoto, Y Mikami, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, R Mizuk, D Mohapatra, T Mori, T Nagamine, Y Nagasaka, E Nakano, M Nakao, Z Natkaniec, S Nishida, O Nitoh, T Nozaki, S Ogawa, T Ohshima, T Okabe, S Okuno, SL Olsen, Y Onuki, W Ostrowicz, H Ozaki, H Palka, CW Park, H Park, N Parslow, R Pestotnik, LE Piilonen, FJ Ronga, H Sagawa, Y Sakai, N Sato, T Schietinger, O Schneider, C Schwanda, R Seuster, ME Sevior, H Shibuya, B Shwartz, Sidorov, V, A Somov, R Stamen, S Stanic, M Staric, K Sumisawa, T Sumiyoshi, SY Suzuki, O Tajima, F Takasaki, K Tamai, N Tamura, M Tanaka, Y Teramoto, XC Tian, T Tsukamoto, S Uehara, K Ueno, T Uglov, S Uno, P Urquijo, G Varner, KE Varvell, S Villa, CC Wang, CH Wang, MZ Wang, QL Xie, BD Yabsley, A Yamaguchi, H Yamamoto, Y Yamashita, M Yamauchi, J Ying, J Zhang, LM Zhang, ZP Zhang, D Zontar

    PHYSICS LETTERS B   621 ( 1-2 )   28 - 40   2005年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We report measurements of partial branching fractions of inclusive charmless semileptonic B-meson decays at the endpoint of the electron momentum spectrum. The measurements are made in six overlapping momentum intervals that have lower bounds ranging from 1.9 to 2.4 GeV/c and a common upper bound of 2.6 GeV/c, as measured in the centre of mass frame. The results are based on a sample of 29 million B (B) over bar pairs, accumulated by the Belle detector at the KEKB asymmetric e(+)e(-) collider operating on the Y(4S) resonance. In the momentum interval ranging from 1.9 to 2.6 GeV/c we measure the partial branching fraction Delta B(B -&gt;. X(u)ev(e)) = (8.47 +/- 0.37 +/- 1.53) x 10(-4), where the first error is statistical and the second is systematic. A prediction of the partial rate R = (21.69 +/- 3.62(-1.98)(+2.18)), vertical bar Vub vertical bar(2) ps(-1) in this momentum interval based on theory is calculated with input HQET parameters that have been derived from Belle's measurement of the B -&gt; X(s)y photon energy spectrum, where the first error is due to the uncertainty on HQET parameters and the second error is from theory. Using both AB(B -&gt; X(u)ev(e)) and R we find vertical bar Vub vertical bar = (5.08 +/- 0.47 +/- 0.42(-0.23)(+0.26)) x 10(-3), where the first error is from the partial branching fraction, and the second and third errors are from uncertainties in R. (c) 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.06.011

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  • Cross-talk of a multi-anode PMT and attainment of a sigma similar to 10ps TOF counter 査読

    Y Enari, K Hayasaka, T Hokuue, K Inami, T Ohshima, N Sato, M Akatsu, S Kawakami, Y Miyabayashi, H Tokuda, H Yanase, H Shimoi, T Fujimori

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   547 ( 2-3 )   490 - 503   2005年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We extensively studied a cross-talk phenomenon that seriously deteriorates the high time-resolution of a multi-anode 16-channel linear array photo-multiplier tube (PMT), the dynode structures were modified to eliminate the cross-talk effect and to recover a time resolution of sigma = 70-80 ps for single photons, The use of 16 anode signals of the modified PMT enabled us to attain sigma = 12ps for a small TOF counter of Cherenko radiation (c) 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2005.03.159

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  • Search for the b→dγ process 査読

    Mohapatra D, Nakao M, Yabsley B.D, Abe K, Abe K, Aihara H, Arinstein K, Asano Y, Aushev T, Aziz T, Bahinipati S, Bakich A.M, Barberio E, Barbero M, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chao Y, Chen A, Chen W.T, Cheon B.G, Chistov R, Choi S.-K, Choi Y, Chuvikov A, Dalseno J, Danilov M, Dash M, Dragic J, Eidelman S, Gershon T, Gokhroo G, Golob B, Gori?ek A, Hara T, Hayasaka K, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Hsiung Y, B, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Kawai H, Kawasaki T, Khan H.R, Kim H.J, Kim S.M, Kinoshita K, Kri?an P, Krokovny P, Kulasiri R, Kuo C.C, Kuzmin A, Kwon Y.-J, Leder G, Lee S.E, Lesiak T, Li J, Limosani A, Lin S.-W, Liventsev D, Majumder G, Mandl F, Matyja A, Mikami Y, Mitaroff W, Miyata H, Moloney G.R, Nagamine T, Nagasaka Y, Nakano E, Nakazawa H, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen S.L, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Park H, Pestotnik R, Piilonen L.E, Sakai Y, Sarangi T.R, Sato N, Satoyama N, Schietinger T, Schneider O, Sch{\"u}mann J, Schwartz A.J, Senyo K, Sevior M.E, Shibuya H, Somov A, Soni N, Stamen R, Stani? S, Stari? M, Sumiyoshi T, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor G.N, Teramoto Y, Tian X.C, Trabelsi K, Uehara S, Uglov T, Ueno K, Uno S, Varner G, Villa S, Wang C.C, Wang C.H, Watanabe Y, Xie Q.L, Yamashita Y, Yamauchi M, Yang H, Ying J, Zhang C.C, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V, Z{\"u}rcher D

    Physical Review D - Particles, Fields, Gravitation and Cosmology   72 ( 1 )   1 - 5   2005年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.72.011101

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    その他リンク: http://orcid.org/0000-0001-6373-2346

  • Branching fraction, polarization and C P-violating asymmetries in B-0 -&gt; D*D+*(-) decays

    H Miyake, M Hazumi, K Abe, K Abe, H Aihara, Y Asano, Aulchenko, V, T Aushev, T Aziz, S Bahinipati, AM Bakich, Balagura, V, Y Ban, S Banerjee, A Bay, Bedny, I, U Bitenc, Bizjak, I, S Blyth, A Bondar, A Bozek, M Bracko, J Brodzicka, TE Browder, Y Chao, A Chen, KF Chen, BG Cheon, R Chistov, SK Choi, Y Choi, YK Choi, A Chuvikov, J Dalseno, M Danilov, M Dash, LY Dong, J Dragic, A Drutskoy, S Eidelman, Eiges, V, Y Enari, S Fratina, N Gabyshev, A Garmash, T Gershon, G Gokhroo, B Golob, J Haba, K Hara, T Hara, NC Hastings, K Hayasaka, H Hayashii, L Hinz, T Hokuue, Y Hoshi, S Hou, WS Hou, T Iijima, A Imoto, K Inami, A Ishikawa, R Itoh, M Iwasaki, Y Iwasaki, JH Kang, JS Kang, P Kapusta, SU Kataoka, N Katayama, H Kawai, T Kawasaki, HR Khan, H Kichimi, HJ Kim, JH Kim, SK Kim, SM Kim, K Kinoshita, P Koppenburg, S Korpar, P Krizan, P Krokovny, R Kulasiri, CC Kuo, A Kuzmin, YJ Kwon, G Leder, SE Lee, T Lesiak, J Li, SW Lin, D Liventsev, G Majumder, F Mandl, T Matsumoto, A Matyja, W Mitaroff, K Miyabayashi, H Miyata, R Mizuk, D Mohapatra, T Mori, T Nagamine, Y Nagasaka, E Nakano, M Nakao, H Nakazawa, Z Natkaniec, S Nishida, O Nitoh, S Ogawa, T Ohshima, T Okabe, S Okuno, SL Olsen, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, H Park, N Parslow, LS Peak, R Pestotnik, LE Piilonen, M Rozanska, H Sagawa, Y Sakai, N Sato, T Schietinger, O Schneider, P Schonmeier, J Schumann, C Schwanda, AJ Schwartz, K Senyo, R Seuster, ME Sevior, H Shibuya, JB Singh, A Somov, N Soni, R Stamen, S Stanic, M Staric, T Sumiyoshi, S Suzuki, SY Suzuki, O Tajima, F Takasaki, K Tamai, N Tamura, M Tanaka, Y Teramoto, XC Tian, K Trabelsi, T Tsukamoto, S Uehara, K Ueno, T Uglov, S Uno, Y Ushiroda, G Varner, KE Varvell, S Villa, CC Wang, CH Wang, MZ Wang, A Watanabe, Y Watanabe, A Yamaguchi, H Yamamoto, T Yamanaka, Y Yamashita, A Yamauchi, J Ying, Y Yusa, J Zhang, LM Zhang, ZP Zhang, Zhilich, V, D Zontar

    PHYSICS LETTERS B   618 ( 1-4 )   34 - 42   2005年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We present measurements of the branching fraction, the polarization parameters and CP-violating asymmetries in B-0-&gt; D*+D*(-) decays using a 140 fb(-1) data sample collected at the gamma(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e(-) collider. We obtain B(B-0 -&gt; D*D+*(-)) = [0.81 +/- 0.08(stat)+/- 0.11(syst)] x 10(-3), R-perpendicular to = 0.19 +/- 0.08(stat)+/- 0.01(syst), R-0 = 0.57 +/- 0.08(stat)+/- 0.02(syst), S = -0.75 +/- 0.56(stat)+/- 0.12(syst) and A = -0.26 +/- 0.26(stat)+/- 0.06(syst). Consistency with Standard Model expectations is also discussed. (c) 2005 Published by Elsevier B.V.

    DOI: 10.1016/j.physletb.2005.05.052

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  • Search for τ → eγ and μγ 査読

    K. Hayasaka

    Nuclear Physics B - Proceedings Supplements   144   149 - 154   2005年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We have searched for the lepton-flavor-violating decay τ → eγ and μγ using a data sample of about 87 fb-1 collected with the Belle detector at the KEKB asymmetric e+e- collider. No evidence of a signal for the two processes is found, and we set an upper limit for the branching fraction of τ → eγ decay B(τ → eγ) &lt
    3.9 × 10-7, and that of τ → μγ decay B(τ → μγ) &lt
    3.1 × 10-7 at 90% confidence level. © 2005 Published by Elsevier B.V.

    DOI: 10.1016/j.nuclphysbps.2005.02.020

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  • Erratum: Measurement of masses and branching ratios of Ξ c + and Ξ c 0 baryons (Physics Letters B (2004) 605 (237) DOI: 10.1016/j.physletb.2004.11.038) 査読

    T. Lesiak, K. Abe, K. Abe, I. Adachi, H. Aihara, Y. Asano, S. Bahinipati, A. M. Bakich, A. Bay, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, V. Eiges, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, J. Haba, K. Hayasaka, M. Hazumi, L. Hinz, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, K. Kinoshita, S. Korpar, P. Krokovny, S. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lange, G. Leder, S. W. Lin, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyata, G. R. Moloney, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Park, K. S. Park, N. Parslow, L. S. Peak, L. E. Piilonen, M. Rozanska, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, S. Semenov, H. Shibuya, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, J. Ying, Y. Yusa, C. C. Zhang, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Žontar

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   617 ( 3-4 )   198 - 200   2005年6月

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    DOI: 10.1016/j.physletb.2005.05.014

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  • Measurement of polarization and triple-product correlations in B→K* decays 査読

    Chen K.-F, Abe K, Abe K, Aihara H, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich A.M, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chang M.-C, Chang P, Chao Y, Chen A, Chen W.T, Cheon B.G, Chistov R, Choi S.-K, Choi Y, Chuvikov A, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Gori?ek A, Haba J, Hastings N.C, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Hsiung Y, B, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kichimi H, Kim H.J, Kim S.K, Kim S.M, Kinoshita K, Korpar S, Kri?an P, Krokovny P, Kumar S, Kuo C.C, Kuzmin A, Kwon Y.-J, Lange J.S, Leder G, Lee S.E, Lee Y.-J, Lesiak T, Li J, Lin S.-W, Liventsev D, MacNaughton J, Mandl F, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Moloney G.R, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park C.W, Parslow N, Peak L.S, Pestotnik R, Piilonen L.E, Root N, Rozanska M, Sagawa H, Sakai Y, Sarangi T.R, Sato N, Schietinger T, Schneider O, Sch{\"u}mann J, Schwanda C, Schwartz A.J, Senyo K, Sevior M.E, Shibata T, Shibuya H, Shwartz B, Sidorov V, Singh J.B, Somov A, Soni N, Stamen R, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian X.C, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Ushiroda Y, Varner G, Varvell K.E, Villa S, Wang C.C, Wang C.H, Wang M.-Z, Watanabe M, Watanabe Y, Xie Q.L, Yabsley B.D, Yamaguchi A, Yamashita Y, Yamauchi M, Yang H, Ying J, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V, ?ontar D, Z{\"u}rcher D

    Physical Review Letters   94 ( 22 )   2005年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.94.221804

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  • Study of the baryon–antibaryon low-mass enhancements in charmless three-body baryonic B decays 査読

    The Belle collaboration, K, Hayasaka は

    Physics Letters B   617 ( 3-4 )   141 - 149   2005年6月

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    DOI: 10.1016/j.physletb.2005.05.008

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  • Measurements of branching fractions and CP asymmetries in B→ηh decays 査読

    Chang P, Abe K, Abe K, Aihara H, Akatsu M, Asano Y, Aushev T, Bakich A.M, Balagura V, Ban Y, Banerjee S, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chao Y, Chen A, Chen K.-F, Cheon B.G, Chistov R, Choi S.-K, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Eiges V, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Guo R, Haba J, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Hsiung Y.B, Huang H.-C, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kichimi H, Kim H.J, Kim J.H, Kim S.K, Kim S.M, Koppenburg P, Korpar S, Krian P, Krokovny P, Kulasiri R, Kuo C.C, Kwon Y.-J, Lee S.E, Lee S.H, Lesiak T, Li J, Lin S.-W, Liventsev D, Majumder G, Mandl F, Matsumoto T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nishida S, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Ostrowicz W, Ozaki H, Pakhlov P, Park C.W, Park H, Parslow N, Pestotnik R, Piilonen L.E, Rozanska M, Sagawa H, Sakai Y, Schietinger T, Schneider O, Sch{\"o}nmeier P, Sch{\"u}mann J, Schwartz A.J, Senyo K, Shibuya H, Singh J.B, Somov A, Soni N, Stamen R, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamura N, Tanaka M, Teramoto Y, Tian X.C, Uehara S, Uglov T, Ueno K, Uno S, Ushiroda Y, Varner G, Varvell K.E, Villa S, Wang C.C, Wang C.H, Wang M.-Z, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yang H, Ying J, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V, Ontar D

    Physical Review D - Particles, Fields, Gravitation and Cosmology   71 ( 9 )   1 - 6   2005年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.71.091106

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  • Search for B-0 -&gt; J/psi D-0 and B+ -&gt; J/psi D-0 pi(+) decays 査読

    LM Zhang, ZP Zhang, K Abe, K Abe, Adachi, I, H Aihara, Y Asano, T Aushev, S Bahinipati, AM Bakich, M Barbero, U Bitenc, Bizjak, I, S Blyth, A Bondar, A Bozek, M Bracko, J Brodzicka, TE Browder, Y Chao, A Chen, KF Chen, WT Chen, BG Cheon, R Chistov, Y Choi, A Chuvikov, S Cole, J Dalseno, M Danilov, M Dash, A Drutskoy, S Eidelman, S Fratina, N Gabyshev, T Gershon, G Gokhroo, B Golob, A Gorisek, T Hara, K Hayasaka, H Hayashii, M Hazumi, L Hinz, T Hokuue, Y Hoshi, S Hou, WS Hou, T Iijima, A Imoto, K Inami, A Ishikawa, R Itoh, M Iwasaki, Y Iwasaki, JH Kang, JS Kang, SU Kataoka, N Katayama, H Kawai, T Kawasaki, HR Khan, H Kichimi, HJ Kim, HO Kim, SK Kim, SM Kim, K Kinoshita, S Korpar, P Krokovny, R Kulasiri, S Kumar, CC Kuo, YJ Kwon, G Leder, T Lesiak, J Li, SW Lin, D Liventsev, G Majumder, F Mandl, T Matsumoto, Y Mikami, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, R Mizuk, D Mohapatra, T Mori, T Nagamine, Y Nagasaka, E Nakano, M Nakao, Z Natkaniec, S Nishida, O Nitoh, S Ogawa, T Ohshima, T Okabe, S Okuno, SL Olsen, Y Onuki, W Ostrowicz, H Ozaki, H Palka, CW Park, H Park, N Parslow, R Pestotnik, LE Piilonen, H Sagawa, Y Sakai, N Sato, T Schietinger, O Schneider, K Senyo, H Shibuya, B Shwartz, Sidorov, V, A Somov, R Stamen, S Stanic, M Staric, K Sumisawa, T Sumiyoshi, S Suzuki, SY Suzuki, O Tajima, F Takasaki, K Tamai, N Tamura, M Tanaka, Y Teramoto, XC Tian, K Trabelsi, T Tsukamoto, S Uehara, T Uglov, K Ueno, S Uno, P Urquijo, G Varner, KE Varvell, S Villa, CC Wang, CH Wang, MZ Wang, QL Xie, A Yamaguchi, H Yamamoto, Y Yamashita, M Yamauchi, J Ying, CC Zhang, J Zhang, D Zontar

    PHYSICAL REVIEW D   71 ( 9 )   091107   2005年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We report the results of a search for the decay modes B-0 -&gt; J/psi(D) over bar (0) and B+ -&gt; J/psi(D) over bar (0)pi(+). The analysis is based on 140 fb(-1) of data accumulated by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. No significant signals are observed and we determine the branching fraction upper limits B(B-0 -&gt; J/psi(D) over bar (0)) &lt; 2.0 x 10(-5) and b(B+-&gt; J/psi(D) over bar (0)pi(+)) &lt; 2.5 x 10(-5) at 90% confidence level. These results rule out the explanation of the excess in the low momentum region of the inclusive J/psi spectrum as intrinsic charm content in the B meson. The branching fractions of the corresponding nonresonant decay channels are also reported.

    DOI: 10.1103/PhysRevD.71.091107

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  • Search for B0→J/ψD̄0 and B+→J/ψD̄0π+ decays 査読

    Zhang L.M, Zhang Z.P, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Bahinipati S, Bakich A.M, Barbero M, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chao Y, Chen A, Chen K.-F, Chen W.T, Cheon B.G, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Goriek A, Hara T, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Kataoka S, U, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kichimi H, Kim H.J, Kim H.O, Kim S.K, Kim S.M, Kinoshita K, Korpar S, Krokovny P, Kulasiri R, Kumar S, Kuo C.C, Kwon Y.-J, Leder G, Lesiak T, Li J, Lin S.-W, Liventsev D, Majumder G, Mandl F, Matsumoto T, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mizuk R, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Onuki Y, Ostrowicz W, Ozaki H, Palka H, Park C.W, Park H, Parslow N, Pestotnik R, Piilonen L.E, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Senyo K, Shibuya H, Shwartz B, Sidorov V, Somov A, Stamen R, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki S.Y, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian X.C, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell K.E, Villa S, Wang C.C, Wang C.H, Wang M.-Z, Xie Q.L, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Ying J, Zhang C.C, Zhang J, Ontar D

    Physical Review D - Particles, Fields, Gravitation and Cosmology   71 ( 9 )   1 - 6   2005年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.71.091103

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  • Measurement of the γγ → π<sup>+</sup>π<sup>-</sup> and γγ → K<sup>+</sup>K<sup>-</sup> processes at energies of 2.4-4.1 GeV 査読

    H. Nakazawa, S. Uehara, et. al, Belle Collaboation

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   615 ( 1-2 )   39 - 49   2005年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We have measured π+π- and K+K - production in two-photon collisions using 87.7fb-1 of data collected with the Belle detector at the asymmetric energy e +e- collider KEKB. The cross sections are measured to high precision in the two-photon center-of-mass energy (W) range between 2.4GeV&lt;W&lt;4.1GeV and angular region |cosθ*|&lt;0.6. The cross section ratio σ(γγ→K+K-)/ σ(γγ→π+π-) is measured to be 0.89±0.04(stat.)±0.15(syst.) in the range of 3.0GeV&lt;W&lt;4. 1GeV, where the ratio is energy-independent. We observe a sin -4θ* behavior of the cross section in the same W range. Production of χc0 and χc2 mesons is observed in both γγ→π+π- and γγ→K+K- modes. © 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.03.067

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  • Observation of an isotriplet of excited charmed baryons decaying to Λ <inf>c</inf><sup>+</sup> π 査読

    Mizuk R, Abe K, Aihara H, Akatsu M, Asano Y, Aulchenko V, Aushev T, Bakich A.M, Balagura V, Ban Y, Banerjee S, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chao Y, Chen A, Cheon B.G, Chistov R, Choi S.-K, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Haba J, Hastings N.C, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Hsiung Y, B, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kichimi H, Kim H.J, Kim J.H, Kim S.K, Kim S.M, Koppenburg P, Korpar S, Kri?an P, Krokovny P, Kulasiri R, Kuo C.C, Kuzmin A, Kwon Y.-J, Lee S.E, Lee S.H, Lesiak T, Li J, Lin S.-W, Liventsev D, Majumder G, Mandl F, Matsumoto T, Mitaroff W, Miyake H, Miyata H, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nishida S, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park C.W, Park H, Parslow N, Pestotnik R, Piilonen L.E, Sagawa H, Sakai Y, Schietinger T, Schneider O, Sch{\"o}nmeier P, Sch{\"u}mann J, Semenov S, Senyo K, Seuster R, Shibuya H, Singh J.B, Somov A, Soni N, Stamen R, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Suzuki S.Y, Tajima O, Takasaki F, Tamura N, Tanaka M, Teramoto Y, Tian X.C, Uehara S, Uglov T, Ueno K, Uno S, Varner G, Varvell K.E, Villa S, Wang C.C, Wang C.H, Wang M.-Z, Yabsley B.D, Yamaguchi A, Yamashita Y, Yamauchi M, Yang H, Ying J, Zhang C.C, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V, ?ontar D, Z{\"u}rcher D

    Physical Review Letters   94 ( 12 )   2005年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.94.122002

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Study of B <sup>0</sup> → ρ±π∓ time-dependent CP violation at Belle 査読

    Wang C.C, Abe K, Abe K, Abe T, Adachi I, Aihara H, Asano Y, Aushev T, Bakich A.M, Ban Y, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Browder T.E, Chang P, Chao Y, Chen K.-F, Chen W.T, Cheon B.C, Choi S.-K, Choi Y, Chuvikov A, Cole S, Dash M, Dong L.Y, Dragic J, Drutskoy A, Eidelman S, Eiges V, Gershon T, Gokhroo G, Guo R, Haba J, Hastings N.C, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Hsiung Y, B, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh K, Itoh R, Iwasaki H, Iwasaki Y, Kakuno H, Kang J.H, Kang J.S, Kapusta P, Katayama N, Kawasaki T, Khan H.R, Kichimi H, Kim H.J, Kinoshita K, Kri?an P, Krokovny P, Kumar S, Kwon Y.-J, Lange J.S, Lee S.E, Lee Y.-J, Lesiak T, Li J, Limosani A, Lin S.-W, MacNaughton J, Matsumoto T, Matyja A, Mikami Y, Mitaroff W, Miyata H, Mizuk R, Mohapatra D, Mori T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L

    Physical Review Letters   94 ( 12 )   2005年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.94.121801

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Observation of B<sup>+</sup>→K<sup>+</sup>ηγ 査読

    S. Nishida, et. al, Belle Collaboation

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   610 ( 1-2 )   23 - 30   2005年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We report measurements of radiative B decays with Kηγ final states, using a data sample of 253 fb-1 recorded at the Υ(4S) resonance with the Belle detector at the KEKB e+e- storage ring. We observe B+→K+ηγ for the first time with a branching fraction of (8.4±1.5(stat)-0.9+1.2(syst))×10-6 for MKη&lt;2.4 GeV/c2, and find evidence of B0→K 0ηγ. We also search for B→K3*(1780) γ. © 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.01.097

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  • Improved measurements of the partial rate asymmetry in B → hh decays 査読

    Ch{\`a}o Y, Chang P, Abe K, Abe K, Aihara H, Asano Y, Aushev T, Bahinipati S, Bakich A.M, Ban Y, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bra?ko M, Brodzicka J, Browder T.E, Chen K.-F, Cheon B.G, Chistov R, Choi S.-K, Choi Y, Cole S, Danilov M, Dash M, Dong L.Y, Eidelman S, Eiges V, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Guo R, Haba J, Hastings N.C, Hayasaka K, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou W.-S, Hsiung Y, B, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki Y, Kakuno H, Kang J.H, Kang J.S, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kim H.J, Kim J.H, Kinoshita K, Koppenburg P, Korpar S, Krokovny P, Kwon Y.-J, Leder G, Lee Y.-J, Lesiak T, Li J, Lin S.-W, MacNaughton J, Mandl F, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Ostrowicz W, Ozaki H, Palka H, Park C.W, Park H, Parslow N, Piilonen L.E, Rozanska M, Sagawa H, Sakai Y, Sato N, Schneider O, Sch{\"u}mann J, Schwartz A.J, Semenov S, Sevior M.E, Shibuya H, Shwartz B, Sidorov V, Somov A, Soni N, Stamen R, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor G.N, Teramoto Y, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Varner G, Varvell K.E, Wang C.C, Wang C.H, Watanabe M, Yabsley B.D, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yang H, Ying J, Zang S.L, Zhang J, Zhang Z.P, ontar D

    Physical Review D - Particles, Fields, Gravitation and Cosmology   71 ( 3 )   2005年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.71.031502

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    その他リンク: http://orcid.org/0000-0001-6373-2346

  • Search for D <sup>0</sup>-D̄ <sup>0</sup> Mixing in D <sup>0</sup> → K <sup>+</sup> π <sup>-</sup> decays and measurement of the doubly-cabibbo-suppressed decay rate 査読

    J. Li, Z. P. Zhang, A. J. Schwartz, et. al, Belle Collaboation

    Physical Review Letters   94 ( 7 )   2005年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We have searched for mixing in the D 0-D̄ 0 system by measuring the decay-time distribution of D 0 → K + π - decays. The analysis uses 90 fb -1 of data collected by the Belle detector at the KEKB e +e - collider. We fit the decay-time distribution for the mixing parameters x′ and y′ and also for the parameter R D, which is the ratio of the rate for the doubly-Cabibbo-suppressed decay D 0→ K + π - to that for the Cabibbb-favored decay D 0 → K - π +. We do these fits both assuming CP conservation and allowing for CP violation. We use a frequentist method to obtain a 95% C.L. region in the x ′2-y′ plane. Assuming no mixing, we measure R D = (0.381 ± 0.017 -0.016+0.008)%. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevLett.94.071801

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  • Observation of B̅0→DsJ*(2317)+K- Decay

    Drutskoy A., Abe K., Abe K., Adachi I., Aihara H., Akatsu M., Asano Y., Aushev T., Bahinipati S., Bakich A. M., Bay A., Eiges V., Enari Y., Fang F., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Golob B., Hayasaka K., Natkaniec Z., Hayashii H., Hazumi M., Higuchi T., Hinz L., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Imoto A., Inami K., Nishida S., Ishikawa A., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Kapusta P., Katayama N., Kawai H., Kawasaki T., Khan H. R., Nitoh O., Kichimi H., Kim H. J., Kim J. H., Kim S. K., Kim S. M., Kinoshita K., Koppenburg P., Križan P., Krokovny P., Kulasiri R., Ogawa S., Kuo C. C., Kuzmin A., Kwon Y. -J., Lange J. S., Lee S. H., Lesiak T., Li J., Lin S. -W., Liventsev D., MacNaughton J., Ohshima T., Majumder G., Mandl F., Matsumoto T., Matyja A., Mikami Y., Mitaroff W., Miyata H., Mizuk R., Mohapatra D., Mori T., Okabe T., Nagamine T., Nagasaka Y., Nakano E., Nakao M., Nakazawa H., Olsen S. L., Ostrowicz W., Ozaki H., Pakhlov P., Bedny I., Palka H., Park C. W., Park H., Parslow N., Pestotnik R., Piilonen L. E., Rozanska M., Sagawa H., Sakai Y., Sato N., Bitenc U., Schietinger T., Schneider O., Schönmeier P., Schümann J., Schwartz A. J., Semenov S., Senyo K., Seuster R., Shibuya H., Somov A., Bizjak I., Soni N., Stamen R., Stanič S., Starič M., Sumisawa K., Sumiyoshi T., Suzuki S., Suzuki S. Y., Tajima O., Takasaki F., Blyth S., Tamai K., Tamura N., Tanaka M., Teramoto Y., Tian X. C., Tsukamoto T., Uehara S., Uglov T., Ueno K., Uno S., Bondar A., Villa S., Wang C. C., Wang C. H., Wang M. -Z., Watanabe M., Yabsley B. D., Yamaguchi A., Yamashita Y., Yamauchi M., Ying J., Bozek A., Zhang C. C., Zhang L. M., Zhang Z. P., Zhilich V., Žontar D., Bračko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen K. -F., Chen W. T., Cheon B. G., Chistov R., Choi S. -K., Choi Y., Chuvikov A., Cole S., Dalseno J., Danilov M., Dash M., Eidelman S.

    PHYSICAL REVIEW LETTERS   94 ( 61802 )   1 - 6   2005年

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    記述言語:英語   出版者・発行元:The American Physical Society  

    DOI: 10.1103/PhysRevLett.94.061802

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  • Observation of B+→K1(1270)+γ

    Yang Heyoung, Nakao M., Abe K., Abe K., Aihara H., Asano Y., Aushev T., Bahinipati S., Bakich A. M., Ban Y., Bedny I., Cole S., Dalseno J., Dash M., Eidelman S., Enari Y., Fang F., Inami K., Gabyshev N., Garmash A., Gershon T., Miyabayashi K., Gokhroo G., Golob B., Haba J., Hayasaka K., Hayashii H., Hazumi M., Hinz L., Iwasaki Y., Hokuue T., Hoshi Y., Miyake H., Kang J. H., Kang J. S., Kataoka S. U., Katayama N., Kawai H., Park C. W., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Miyata H., Kim J. H., Kim S. K., Kim S. M., Kim T. H., Kinoshita K., Korpar S., Parslow N., Krokovny P., Kuo C. C., Kuzmin A., Mizuk R., Kwon Y. -J., Lange J. S., Leder G., Lee S. H., Lesiak T., Li J., Lin S. -W., Pestotnik R., Majumder G., Matsumoto T., Nagamine T., Matyja A., Mitaroff W., Nagasaka Y., Piilonen L. E., Nakano E., Natkaniec Z., Nishida S., Ueno K., Nitoh O., Ogawa S., Ohshima T., Okabe T., Okuno S., Olsen S. L., Ostrowicz W., Rozanska M., Pakhlov P., Palka H., Uno S., Sagawa H., Sakai Y., Sato N., Schietinger T., Schneider O., Bitenc U., Schümann J., Schwanda C., Schwartz A. J., Seuster R., Ushiroda Y., Shibuya H., Somov A., Soni N., Stamen R., Stanič S., Starič M., Bizjak I., Sumisawa K., Sumiyoshi T., Suzuki S., Varner G., Suzuki S. Y., Tajima O., Takasaki F., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Blyth S., Tian X. C., Tsukamoto T., Varvell K. E., Uehara S., Uglov T., Villa S., Bondar A., Wang C. H., Wang M. -Z., Watanabe M., Hsiung Y. B., Yamaguchi A., Yamashita Y., Yamauchi M., Yuan Y., Zhang L. M., Zhang Z. P., Zhilich V., Bozek A., Žontar D., Zürcher D., Iijima T., Bračko M., Brodzicka J., Browder T. E., Chang M. -C., Chang P., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Imoto A., Choi S. -K., Choi Y., Choi Y. K., Chuvikov A.

    PHYSICAL REVIEW LETTERS   94 ( 111802 )   1 - 5   2005年

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    記述言語:英語   出版者・発行元:The American Physical Society  

    DOI: 10.1103/PhysRevLett.94.111802

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  • Measurements of B Decays to Two Kaons

    Abe K., Adachi I., Aihara H., Asano Y., Aulchenko V., Aushev T., Bakich A. M., Balagura V., Banerjee S., Barberio E., Barbero M., Dragic J., Drutskoy A., Eidelman S., Enari Y., Fratina S., Gabyshev N., Gershon T., Go A., Nagasaka Y., Gokhroo G., Okuno S., Golob B., Gorišek A., Haba J., Hara T., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Hinz L., Nakano E., Olsen S. L., Hokuue T., Hoshi Y., Hou S., Hou W. -S., Hsiung Y. B., Iijima T., Ikado K., Imoto A., Ishikawa A., Ishino H., Onuki Y., Nakao M., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Kataoka S. U., Katayama N., Kawai H., Kawasaki T., Ostrowicz W., Khan H. R., Natkaniec Z., Kichimi H., Kim J. H., Kim S. K., Kim S. M., Kinoshita K., Korpar S., Križan P., Krokovny P., Ozaki H., Kuo C. C., Kuzmin A., Nishida S., Kwon Y. -J., Lee S. E., Lesiak T., Li J., Lin S. -W., Liventsev D., Majumder G., Pakhlov P., Mandl F., Matsumoto T., Matyja A., Nitoh O., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Mohapatra D., Palka H., Noguchi S., Nozaki T., Ogawa S., Bay A., Ohshima T., Okabe T., Park C. W., Bedny I., Parslow N., Chen K. -F., Peak L. S., Pestotnik R., Piilonen L. E., Piilonen M., Sakai Y., Sato N., Satoyama N., Sayeed K., Schietinger T., Bitenc U., Chen W. T., Schneider O., Schwartz A. J., Sevior M. E., Shibuya H., Sidorov V., Somov A., Soni N., Stanič S., Starič M., Sumisawa K., Cheon B. G., Bizjak I., Sumiyoshi T., Suzuki S., Tajima O., Takasaki F., Tamai K., Tamura N., Tanaka M., Taylor G. N., Teramoto Y., Chistov R., Tian X. C., Blyth S., Trabelsi K., Tsuboyama T., Tsukamoto T., Uehara S., Uglov T., Unno Y., Uno S., Urquijo P., Choi S. -K., Ushiroda Y., Varner G., Bondar A., Wang C. H., Wang M. -Z., Watanabe Y., Won E., Xie Q. L., Yabsley B. D., Yamaguchi A., Choi Y., Yamashita Y., Yamauchi M., Ying J., Bozek A., Zang S. L., Zhang J., Zhang L. M., Zhang Z. P., Zhilich V., Zürcher D., Chuvikov A., Bračko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Cole S., Dalseno J., Danilov M., Moloney G. R., Dash M., Dong L. Y.

    PHYSICAL REVIEW LETTERS   95 ( 231802 )   1 - 5   2005年

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    記述言語:英語   出版者・発行元:The American Physical Society  

    DOI: 10.1103/PhysRevLett.95.231802

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  • Dalitz analysis of the three-body charmless decays B+→K+π+π- and B+→K+K+K-

    Garmash A., Abe K., Abe K., Aihara H., Akatsu M., Asano Y., Aulchenko V., Aushev T., Aziz T., Bahinipati S., Bakich A. M., Eidelman S., Eiges V., Enari Y., Fratina S., Gabyshev N., Gershon T., Gokhroo G., Haba J., Nakao M., Hara T., Ozaki H., Hastings N. C., Hayasaka K., Hayashii H., Hazumi M., Higuchi T., Hinz L., Hokuue T., Hoshi Y., Hou S., Nakazawa H., Pakhlov P., Hou W. -S., Iijima T., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kang J. S., Palka H., Natkaniec Z., Kataoka S. U., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Kim J. H., Kim S. K., Park H., Kim S. M., Nishida S., Kinoshita K., Koppenburg P., Korpar S., Križan P., Krokovny P., Kulasiri R., Kuo C. C., Kuzmin A., Parslow N., Kwon Y. -J., Lesiak T., Nitoh O., Li J., Lin S. -W., Liventsev D., Majumder G., Mandl F., Marlow D., Matsumoto T., Peak L. S., Matyja A., Mitaroff W., Miyake H., Ogawa S., Miyata H., Mizuk R., Mohapatra D., Mori T., Nagamine T., Nagasaka Y., Pestotnik R., Ohshima T., Okabe T., Okuno S., Ban Y., Olsen S. L., Ostrowicz W., Piilonen L. E., Bedny I., Poluektov A., Cheon B. G., Rozanska M., Sagawa H., Sakai Y., Sato N., Schietinger T., Schneider O., Schönmeier P., Schümann J., Schwanda C., Bitenc U., Chistov R., Schwartz A. J., Semenov S., Senyo K., Shibuya H., Shwartz B., Singh J. B., Somov A., Soni N., Stamen R., Stanič S., Choi S. -K., Bizjak I., Starič M., Sumiyoshi T., Suzuki S., Suzuki S. Y., Tajima O., Takasaki F., Tamai K., Tamura N., Tanaka M., Choi Y., Teramoto Y., Blyth S., Tian X. C., Trabelsi K., Tsukamoto T., Uehara S., Uglov T., Ueno K., Uno S., Ushiroda Y., Choi Y. K., Varner G., Varvell K. E., Bondar A., Villa S., Wang C. C., Wang C. H., Wang M. -Z., Watanabe M., Watanabe Y., Yamaguchi A., Chuvikov A., Yamamoto H., Yamashita Y., Ying J., Bozek A., Yusa Y., Zhang C. C., Zhang L. M., Zhang Z. P., Zhilich V., Žontar D., Dalseno J., Bračko M., Brodzicka J., Chang P., Chao Y., Chen A., Chen K. -F., Danilov M., Dash M., Dong L. Y., Nakano E., Dragic J., Drutskoy A.

    PHYSICAL REVIEW D   71 ( 92003 )   1 - 24   2005年

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    記述言語:英語   出版者・発行元:The American Physical Society  

    DOI: 10.1103/PhysRevD.71.092003

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  • Study of time-dependent CP violation in B <sup>0</sup> → J/ Ψπ <sup>0</sup> decays 261801 査読

    Kataoka S, U, Abe K, Abe K, Adachi I, Aihara H, Akatsu M, Asano Y, Aushev T, Bahinipati S, Bakich A.M, Bay A, Bedny I, Bitenc U, Bizjak I, Bondar A, Bra?ko M, Chao Y, Chen A, Chen W.T, Cheon B.G, Chistov R, Choi Y, Danilov M, Dash M, Dong L.Y, Dragic J, Eidelman S, Eiges V, Enari Y, Fang F, Fratina S, Gabyshev N, Garmash A, Gershon T, Go A, Gokhroo G, Golob B, Haba J, Hara K, Hastings N.C, Hayasaka K, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou W.-S, Hsiung Y, B, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kim H.J, Kinoshita K, Koppenburg P, Korpar S, Kri?an P, Krokovny P, Kuo C.C, Kuzmin A, Kwon Y.-J, Lange J.S, Leder G, Lee S.E, Lee S.H, Lesiak T, Li J, Lin S.-W, MacNaughton J, Mandl F, Matsumoto T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Mohapatra D, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park H, Peak L.S, Piilonen L.E, Ronga F.J, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schumann J, Schwartz A.J, Semenov S, Senyo K, Sevior M.E, Shibata T, Shibuya H, Singh J.B, Somov A, Soni N, Stamen R, Staric M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamura N, Tanaka M, Taylor G.N, Teramoto Y, Trabelsi K, Tsukamoto T, Ueno K, Uno S, Varner G, Villa S, Wang C.C, Wang C.H, Watanabe M, Yabsley B.D, Yamaguchi A, Yamashita Y, Yang H, Ying J, Yuan Y, Zang S.L, Zhang C.C, Zhang J, Zhang L.M, Zhang Z.P, Zhilich V, Ziegler T, ontar D

    Physical Review Letters   93 ( 26 )   2004年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.93.261801

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    その他リンク: http://orcid.org/0000-0002-1018-219X

  • Observation of B<sup>0</sup> → D*<sup>-</sup>(5π) <sup>+</sup>, B<sup>+</sup> → D*<sup>-</sup>(4π)<sup>++</sup> and B<sup>+</sup> → D̄*<sup>0</sup> (5π)<sup>+</sup> 査読

    Majumder G, Abe K, Abe K, Adachi I, Aihara H, Akatsu M, Asano Y, Aziz T, Bahinipati S, Bakich A.M, Bartel W, Bay A, Bedny I, Bitenc U, Bizjak I, Bozek A, Brodzicka J, Browder T.E, Chao Y, Chen W.T, Cheon B.G, Chistov R, Choi S.-K, Chuvikov A, Cole S, Danilov M, Dash M, Eidelman S, Eiges V, Epifanov D, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Haba J, Hayasaka K, Hazumi M, Hoshi Y, Hou S, Hou W.-S, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Katayama N, Kawasaki T, Khan H.R, Kim H.J, Kinoshita K, Kri?an P, Krokovny P, Kumar S, Kuo C.C, Kwon Y.-J, Lange J.S, Leder G, Lesiak T, Lin S.-W, MacNaughton J, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Mohapatra D, Nagasaka Y, Nakadaira T, Nakao M, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Ostrowicz W, Ozaki H, Park H, Park K.S, Parslow N, Piilonen L.E, Sakai Y, Sato N, Schietinger T, Schneider O, Sch{\"u}mann J, Semenov S, Senyo K, Shibuya H, Singh J.B, Somov A, Soni N, Stanic S, Stari? M, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Varner G, Villa S, Wang C.C, Wang C.H, Yabsley B.D, Yamaguchi A, Yamashita Y, Ying J, Zhang L.M, Zhang Z.P, ontar D

    Physical Review D - Particles, Fields, Gravitation and Cosmology   70 ( 11 )   2004年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.70.111103

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    その他リンク: http://orcid.org/0000-0001-6373-2346

  • Study of double charmonium production in e<sup>+</sup>e<sup>-</sup> annihilation at √s ≈ 10.6 GeV 査読

    Abe K, Abe K, Aihara H, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich A.M, Ban Y, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bra?ko M, Brodzicka J, Browder T.E, Chao Y, Cheon B.G, Chistov R, Choi S.-K, Choi Y, Chuvikov A, Cole S, Danilov M, Dash M, Dong L.Y, Eidelman S, Eiges V, Fang F, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Guo R, Haba J, Hastings N.C, Hayasaka K, Hayashii H, Hazumi M, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou W.-S, Hsiung Y, B, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki M, Iwasaki Y, Kang J.H, Kang J.S, Katayama N, Kawai H, Kawasaki T, Khan H.R, Kim H.J, Koppenburg P, Kri?an P, Krokovny P, Kumar S, Kwon Y.-J, Lange J.S, Leder G, Lesiak T, Li J, Lin S.-W, MacNaughton J, Majumder G, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Mizuk R, Mori T, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen S.L, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park C.W, Park H, Parslow N, Peak L.S, Piilonen L.E, Sagawa H, Sakai Y, Sato N, Schneider O, Sch{\"u}mann J, Semenov S, Senyo K, Seuster R, Sevior M.E, Shibuya H, Sidorov V, Somov A, Soni N, Stamen R, Stani? S, Stari? M, Sumisawa K, Sumiyoshi T, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor G.N, Teramoto Y, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Varner G, Varvell K.E, Wang C.C, Wang C.H, Watanabe M, Yabsley B.D, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Zang S.L, Zhang C.C, Zhang J, Zhang Z.P, ontar D

    Physical Review D - Particles, Fields, Gravitation and Cosmology   70 ( 7 )   2004年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevD.70.071102

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    その他リンク: http://orcid.org/0000-0001-6373-2346

  • Measurement of phi(3) with Dalitz plot analysis of B-+/--&gt;(DK +/-)-K-(*) decay 査読

    A Poluektov, K Abe, T Abe, H Aihara, Y Asano, T Aushev, T Aziz, S Bahinipati, AM Bakich, Bedny, I, U Bitenc, Bizjak, I, S Blyth, A Bondar, A Bozek, M Bracko, J Brodzicka, TE Browder, P Chang, Y Chao, BG Cheon, R Chistov, SK Choi, Y Choi, A Chuvikov, M Danilov, M Dash, LY Dong, S Eidelman, Eiges, V, Y Enari, S Fratina, N Gabyshev, A Garmash, T Gershon, G Gokhroo, B Golob, R Guo, J Haba, T Hara, K Hayasaka, H Hayashii, M Hazumi, T Higuchi, L Hinz, T Hokuue, Y Hoshi, WS Hou, YB Hsiung, A Imoto, K Inami, A Ishikawa, R Itoh, H Iwasaki, M Iwasaki, JH Kang, JS Kang, SU Kataoka, N Katayama, H Kawai, T Kawasaki, HR Khan, HJ Kim, JH Kim, SK Kim, K Kinoshita, P Koppenburg, S Korpar, P Krizan, P Krokovny, A Kuzmin, YJ Kwon, SH Lee, T Lesiak, J Li, SW Lin, J MacNaughton, F Mandl, D Marlow, T Matsumoto, A Matyja, W Mitaroff, K Miyabayashi, H Miyata, R Mizuk, T Mori, T Nagamine, Y Nagasaka, T Nakadaira, M Nakao, H Nakazawa, Z Natkaniec, S Nishida, O Nitoh, T Nozaki, S Ogawa, T Ohshima, T Okabe, S Okuno, SL Olsen, W Ostrowicz, H Ozaki, P Pakhlov, N Parslow, LE Piilonen, N Root, M Rozanska, H Sagawa, S Saitoh, Y Sakai, TR Sarangi, N Sato, O Schneider, J Schumann, C Schwanda, AJ Schwartz, S Semenov, K Senyo, R Seuster, ME Sevior, H Shibuya, B Shwartz, Sidorov, V, A Somov, N Soni, R Stamen, S Stanic, M Staric, A Sugiyama, K Sumisawa, T Sumiyoshi, S Suzuki, O Tajima, F Takasaki, K Tamai, N Tamura, M Tanaka, GN Taylor, Y Teramoto, K Trabelsi, T Tsuboyama, T Tsukamoto, S Uehara, T Uglov, K Ueno, Y Unno, S Uno, G Varner, KE Varvell, S Villa, CH Wang, MZ Wang, M Watanabe, BD Yabsley, Y Yamada, A Yamaguchi, Y Yamashita, M Yamauchi, J Ying, Y Yusa, SL Zang, J Zhang, ZP Zhang, Zhilich, V, D Zontar, D Zurcher

    PHYSICAL REVIEW D   70 ( 7 )   072003   2004年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER PHYSICAL SOC  

    We present a measurement of the unitarity triangle angle phi(3) using a Dalitz plot analysis of the three-body decay of the neutral D meson from the B+/---&gt;(DK+/-)-K-(*) process. The method employs the interference between D-0 and (D) over bar (0) to extract both the weak and strong phases. We apply this method to a 140 fb(-1) data sample collected by the Belle experiment. The analysis uses the modes B+/---&gt;DK+/- and B+/---&gt;(DK+/-)-K-*, D-*--&gt;Dpi(0), where the neutral D meson decays into K(S)pi(+)pi(-). We obtain 146 signal candidates for B+/---&gt;DK+/- and 39 candidates for B+/---&gt;(DK+/-)-K-*. From a combined maximum likelihood fit to the B+/---&gt;DK+/- and B+/---&gt;(DK+/-)-K-* modes, we obtain phi(3)=77(-19degrees)(+degrees17)degrees (stat)+/-13degrees(syst)+/-11degrees(model). The corresponding 2 standard deviation interval is 26degrees&lt;phi(3)&lt;126degrees.

    DOI: 10.1103/PhysRevD.70.072003

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  • MCP-PMT timing property for single photons 査読

    M Akatsu, Y Enari, K Hayasaka, T Hokuue, T Iijima, K Inami, K Itoh, Y Kawakami, N Kishimoto, T Kubota, M Kojima, Y Kozakai, Y Kuriyama, T Matsuishi, Y Miyabayashi, T Ohshima, N Sato, K Senyo, A Sugi, S Tokuda, M Tomita, H Yanase, S Yoshino

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   528 ( 3 )   763 - 775   2004年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We have measured the performance, especially the timing properties, of micro-channel plate photo-multiplier tubes (MCP-PMTs) by irradiating with single photons with/without a magnetic field. A time resolution of sigma = 30-35 ps was obtained for single photons under 1.5 T. With an MCP-PMT, a small time-of-flight counter, by means of Cherenkov light radiation instead of scintillation light has been prepared, and a time resolution sigma similar to 10 ps was attained for a highenergy pi-beam by multiple photons. (C) 2004 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2004.04.207

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  • Study of double charmonium production in [Formula Presented] annihilation at [Formula Presented] 査読

    K. Abe, K. Abe, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, Y. Ban, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, B. G. Cheon, R. Chistov, S. Choi, Y. Choi, A. Chuvikov, S. Cole, M. Danilov, M. Dash, L. Y. Dong, S. Eidelman, V. Eiges, F. Fang, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, R. Guo, J. Haba, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, P. Koppenburg, P. Križan, P. Krokovny, S. Kumar, Y. Kwon, J. S. Lange, G. Leder, T. Lesiak, J. Li, S. Lin, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, R. Mizuk, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, N. Parslow, L. S. Peak, L. E. Piilonen, H. Sagawa, Y. Sakai, N. Sato, O. Schneider, J. Schümann, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, V. Sidorov, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, M. Watanabe, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, S. L. Zang, C. C. Zhang, J. Zhang, Z. P. Zhang, D. Žontar

    Physical Review D - Particles, Fields, Gravitation and Cosmology   70 ( 7 )   2004年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    We present a new analysis of double charmonium production in [Formula Presented] annihilation. The observation of the processes [Formula Presented], [Formula Presented], and [Formula Presented] is confirmed using a data set more than 3 times larger than that of Belle’s previous report, and no evidence for the process [Formula Presented] is found. We perform an angular analysis for [Formula Presented] production and set an upper limit on the production of [Formula Presented]. Processes of the type [Formula Presented] have been observed for the first time
    their rates are found to be comparable to those of [Formula Presented] processes. © 2004 The American Physical Society.

    DOI: 10.1103/PhysRevD.70.071102

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  • A new noncommutative product on the fuzzy two-sphere corresponding to the unitary representation of SU(2) and the Seiberg-Witten map 査読

    K Hayasaka, R Nakayama, Y Takaya

    PHYSICS LETTERS B   553 ( 1-2 )   109 - 118   2003年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We obtain a new explicit expression for the noncommutative (star) product on the fuzzy two-sphere which yields a unitary representation. This is done by constructing a star product, *(lambda), for an arbitrary representation of SU(2) which depends on a continuous parameter X and searching for the values of; which give unitary representations. We will find two series of values: lambda = lambda(j)((A)) = 1/(2j) and lambda = lambda(j)((B)) = -1/(2j + 2), where j is the spin of the representation of SU(2). At lambda = lambda(j)((A)) the new star product *(lambda) has poles. To avoid the singularity the functions on the sphere must be spherical harmonics of order l less than or equal to 2j and then *(lambda) reduces to the star product * obtained by Presnajder [hep-th/9912050]. The star product at lambda = lambda(j)((B)), to be denoted by circle, is new. In this case the functions on the fuzzy sphere do not need to be spherical harmonics of order l less than or equal to 2j. The star product *(lambda) has no singularity for negative values of lambda and we can move from one representation lambda = lambda(j)((B)) to another lambda = lambda(j')((B)) smoothly on the negative lambda line. Because in this case there is no cutoff on the order of spherical harmonics, the degrees of freedom of the gauge fields on the fuzzy sphere coincide with those on the commutative sphere. Therefore, although the field theory on the fuzzy sphere is a system with finite degrees of freedom, we can expect the existence of the Seiberg-Witten map between the noncommutative and commutative descriptions of the gauge theory on the sphere. We will derive the first few terms of the Seiberg-Witten map for the U(1) gauge theory on the fuzzy sphere by using power expansion around the commutative point lambda = 0. (C) 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0370-2693(02)03193-3

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  • An associative and noncommutative product for the low energy effective theory of a D-brane in curved backgrounds and bi-local tields 査読

    K Hayasaka, R Nakayama

    NUCLEAR PHYSICS B   624 ( 1-2 )   307 - 326   2002年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    We point out that when a D-brane is placed in an NS-NS B field background with nonvanishing field strength (H = dB) along the D-brane worldvolume, the coordinate of one end of the open string does not commute with that of the other in the low energy limit. The degrees of the freedom associated with both ends are not decoupled and accordingly, the effective action must be quite different from that of the ordinary noncommutative gauge theory for a constant B background. We construct an associative and noncommutative product star which operates on the coordinates of both ends of the string and propose a new type of noncommutative gauge action for the low energy effective theory of a Dp-brane. This effective theory is bi-local and lives in twice as large dimensions (2D = 2(p + 1)) as in the 11 = 0 case. When viewed as a theory in the D-dimensional space, this theory is nonlocal and we must force the two ends of the string to coincide. We will then propose a prescription for reducing this bi-local effective action to that in D dimensions and obtaining a local effective action. (C) 2002 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0550-3213(01)00661-7

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  • Conformal invariance of the D-particle effective action 査読

    K Hayasaka, R Nakayama

    PHYSICS LETTERS B   463 ( 2-4 )   181 - 187   1999年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE BV  

    It is shown that the effective theory of D-particles has conformal symmetry with field-dependent parameters. This is a consequence of the supersymmetry. The string coupling constant is not transformed in contrast with the recent proposal of generalized conformal symmetry by Jevicki et al. [A. Jevicki, T. Yoneya, Nucl. Phys. B 535 (1998) 5072 (hep-th/9805069); A. Jevicki, Y. Kazama, T. Yoneya, hep-th/9810146]. This conformal symmetry can also be generalized to other Dp-brane systems. (C) 1999 Elsevier Science B.V. All rights reserved.

    DOI: 10.1016/S0370-2693(99)00990-9

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  • Non-critical open strings beyond the semiclassical approximation 査読

    J Ambjorn, K Hayasaka, R Nakayama

    MODERN PHYSICS LETTERS A   12 ( 17 )   1241 - 1266   1997年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WORLD SCIENTIFIC PUBL CO PTE LTD  

    We studied the lowest order quantum corrections to the macroscopic wave functions Gamma(A,l) of non-critical string theory using the semiclassical expansion of Liouville theory. By carefully taking the perimeter constraint into account we obtained a new type of boundary condition for the Liouville field which is compatible with the reparametrization invariance of the boundary and which is not only a mixture of Dirichlet and Neumann types but also involves an integral of an exponential of the Liouville field along the boundary. This condition contains an unknown function of A/l(2). We determined this function by computing part of the one-loop corrections to Gamma(A,l).

    DOI: 10.1142/S0217732397001266

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MISC

  • 河川流路制御CPSのためのフーリエ基底による河川健全性評価法

    高橋勇希, 安田浩保, 早坂圭司, 大竹雄, 村松正吾

    電子情報通信学会大会講演論文集(CD-ROM)   2022   2022年

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  • 畳み込みスパース符号化動的モード分解の多重解像度化とその河床状態推定への応用

    小林栄裕, 村松正吾, 安田浩保, 早坂圭司

    電子情報通信学会技術研究報告(Web)   122 ( 165(SIP2022 50-79) )   2022年

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  • 標高差を考慮したグラフ動的モード分解による河川水位分布予測

    北村帆高, 新井裕介, 村松正吾, 安田浩保, 早坂圭司, 大竹雄

    電子情報通信学会大会講演論文集(CD-ROM)   2022   2022年

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  • Search for the $η_{c2}(1D)$ in $e^+e^-\toγη_{c2}(1D)$ at $\sqrt{s}$ near 10.6 GeV at Belle

    Belle Collaboration, S. Jia, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, A. Budano, M. Campajola, D. Červenkov, M. -C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. -J. Cho, S. -K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, G. De Pietro, R. Dhamija, F. Di Capua, Z. Doležal, T. V. Dong, D. Epifanov, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, S. Halder, T. Hara, O. Hartbrich, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, Y. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, K. -H. Kim, S. H. Kim, Y. -K. Kim, K. Kinoshita, P. Kodyš, T. Konno, A. Korobov, S. Korpar, E. Kovalenko, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, M. Kumar, K. Kumara, A. Kuzmin, Y. -J. Kwon, K. Lalwani, J. S. Lange, M. Laurenza, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, M. Masuda, T. Matsuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, H. Miyata, R. Mizuk, R. Mussa, M. Nakao, Z. Natkaniec, A. Natochii, L. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi, S. -H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, T. Podobnik, V. Popov, E. Prencipe, M. T. Prim, A. Rostomyan, N. Rout, G. Russo, D. Sahoo, S. Sandilya, A. Sangal, L. Santelj, T. Sanuki, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, M. E. Sevior, M. Shapkin, C. Sharma, J. -G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, M. Starič, Z. S. Stottler, M. Sumihama, M. Takizawa, K. Tanida, Y. Tao, F. Tenchini, K. Trabelsi, T. Uglov, Y. Unno, K. Uno, S. Uno, P. Urquijo, Y. Usov, S. E. Vahsen, R. Van Tonder, G. Varner, A. Vinokurova, E. Waheed, C. H. Wang, E. Wang, M. -Z. Wang, P. Wang, S. Watanuki, O. Werbycka, E. Won, X. Xu, B. D. Yabsley, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova

    Physical Review D   104 ( 1 )   2021年6月

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    For the first time we search for the $\eta_{c2}(1D)$ in
    $e^+e^-\to\gamma\eta_{c2}(1D)$ at $\sqrt{s}$ = 10.52, 10.58, and 10.867 GeV
    with data samples of 89.5 fb$^{-1}$, 711 fb$^{-1}$, and 121.4 fb$^{-1}$,
    respectively, accumulated with the Belle detector at the KEKB asymmetric energy
    electron-positron collider. No significant $\eta_{c2}(1D)$ signal is observed
    in the mass range between 3.8 and 3.88 GeV/$c^2$. The upper limit at 90\%
    confidence level on the product of the Born cross section for $e^+e^- \to
    \gamma\eta_{c2}(1D)$ and branching fraction for $\eta_{c2}(1D)\to \gamma
    h_c(1P)$ is determined to be $\sigma(e^+e^- \to \gamma\eta_{c2}(1D)){\cal
    B}(\eta_{c2}(1D)\to \gamma h_c(1P))$ $<$ 4.9 fb at $\sqrt{s}$ near 10.6 GeV.

    DOI: 10.1103/PhysRevD.104.012012

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    その他リンク: http://arxiv.org/pdf/2106.09224v2

  • Measurement of the CKM matrix element vertical bar V-cb vertical bar from B-0 -> D*(-) l(+) nu(l) at Belle (vol 100, 052007, 2019)

    E. Waheed, P. Urquijo, D. Ferlewicz, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, I. Badhrees, V. Bansal, P. Behera, C. Beleno, F. Bernlochner, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S-K Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Di Carlo, Z. Dolezal, T. V. Dong, D. Dossett, S. Eidelman, D. Epifanov, J. E. Fast, B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, T. Hedges, W-S Hou, C-L Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, D. Joffe, K. K. Joo, J. Kahn, A. B. Kaliyar, G. Karyan, T. Kawasaki, C. H. Kim, D. Y. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, A. Kuzmin, Y-J Kwon, J. S. Lange, J. Y. Lee, S. C. Lee, C. H. Li, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, P-C Lu, T. Luo, J. MacNaughton, M. Masuda, D. Matvienko, M. Merola, F. Metzner, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, T. Mori, R. Mussa, I. Nakamura, M. Nakao, K. J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, S. Ogawa, H. Ono, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, H. Park, S-H Park, S. Paul, R. Pestotnik, L. E. Piilonen, V. Popov, E. Prencipe, M. Prim, A. Rostomyan, G. Russo, Y. Sakai, M. Salehi, S. Sandilya, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, J. Schueler, C. Schwanda, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, J-G Shiu, B. Shwartz, F. Simon, A. Sokolov, E. Solovieva, S. Stanic, M. Staric, Z. S. Stottler, J. F. Strube, T. Sumiyoshi, M. Takizawa, K. Tanida, F. Tenchini, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, A. Vinokurova, A. Vossen, C. H. Wang, M-Z Wang, P. Wang, E. Won, S. B. Yang, H. Ye, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova

    PHYSICAL REVIEW D   103 ( 7 )   2021年4月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    DOI: 10.1103/PhysRevD.103.079901

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  • Belle実験のデータを使ったチャームバリオン崩壊γγ→π ̄0_c→π ̄-l ̄+→ν_lにおけるレプトンフレーバ普遍性の最初の試験【JST・京大機械翻訳】

    Belle Collaboration, Li Y. B., Shen C. P., Adachi I., Aihara H., Said S. Al, Asner D. M., Atmacan H., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Belous K., Bennett J., Bernlochner F., Bessner M., Bhuyan B., Bilka T., Bobrov A., Bodrov D., Borah J., Bozek A., Bracko M., Branchini P., Browder T. E., Budano A., Campajola M., Cervenkov D., Chang M. -C., Chang P., Chekelian V., Chen A., Cheon B. G., Chilikin K., Cho H. E., Cho K., Cho S. -J., Choi S. -K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Dash N., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., Dolezal Z., Dong T. V., Ferber T., Ferlewicz D., Fulsom B. G., Garg R., Gaur V., Gabyshev N., Giri A., Goldenzweig P., Golob B., Graziani E., Gudkova K., Hadjivasiliou C., Hara T., Hayasaka K., Hayashii H., Hedges M. T., Hou W. -S., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W. W., Jang E. -J., Jia S., Jin Y., Joo K. K., Kahn J., Kang K. H., Kawasaki T., Kichimi H., Kiesling C., Kim C. H., Kim D. Y., Kim K. -H., Kim K. T., Kim Y. -K., Kinoshita K., Kodys P., Konno T., Korobov A., Korpar S., Kovalenko E., Krizan P., Kroeger R., Krokovny P., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y. -J., Lalwani K., Lam T., Laurenza M., Lee S. C., Li J., Li L. K., Li Y., Gioi L. Li, Libby J., Lieret K., Liventsev D., Martini A., Masuda M., Matvienko D., Maurya S. K., Merola M., Miyabayashi K., Mizuk R., Mohanty G. B., Nakao M., Narwal D., Natochii A., Nayak L., Nayak M., Nisar N. K., Nishida S., Ogawa K., Ogawa S., Ono H., Oskin P., Pakhlov P., Pakhlova G., Pang T., Pardi S., Park S. -H., Patra S., Paul S., Pedlar T. K., Pestotnik R., Piilonen L. E., Podobnik T., Prencipe E., Prim M. T., Rohrken M., Rostomyan A., Rout N., Russo G., Sahoo D., Sandilya S., Sangal A., Santelj L., Savinov V., Schnell G., Schueler J., Schwanda C., Seino Y., Senyo K., Sevior M. E., Shapkin M., Sharma C., Shebalin V., Shiu J. -G., Shwartz B., Singh J. B., Sokolov A., Solovieva E., Staric M., Stottler Z. S., Sumihama M., Sumiyoshi T., Takizawa M., Tamponi U., Tanida K., Tenchini F., Uchida M., Uglov T., Unno Y., Uno K., Uno S., Urquijo P., Vahsen S. E., Van Tonder R., Varner G., Vinokurova A., Waheed E., Wang D., Wang E., Wang M. -Z., Watanuki S., Won E., Xu X., Yabsley B. D., Yan W., Yang S. B., Ye H., Yelton J., Yin J. H., Yuan C. Z., Yusa Y., Zhai Y., Zhang Z. P., Zhilich V., Zhukova V.

    arXiv   2021年

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  • マイクロ波レーダーによる河川モニタリングの概念実証

    茂木大知, 大原由暉, 室永武司, 西村雄喬, 有澤良佑, 前野仁, 早坂圭司, 村松正吾, 安田浩保

    河川技術論文集(Web)   27   2021年

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  • 河道能動制御CPSのプロトタイプ構築のための流路健全性指標の検討

    井上大輝, CHEN Zhang, LIU Dongqi, 村松正吾, 安田浩保, 早坂圭司, 大竹雄

    映像情報メディア学会技術報告   45 ( 23(ME2021 71-87) )   2021年

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  • 河道能動制御システムのプロトタイプ構築

    ZHANG Chen, 内藤勇鷹, 村松正吾, 安田浩保, 早坂圭司, 大竹雄

    電子情報通信学会大会講演論文集(CD-ROM)   2021   2021年

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  • Search for Axionlike Particles Produced in e⁺e⁻ Collisions at Belle II

    F. Abudinén, I. Adachi, H. Aihara, N. Akopov, A. Aloisio, F. Ameli, N. Anh Ky, D. M. Asner, T. Aushev, V. Aushev, V. Babu, S. Baehr, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, J. Baudot, J. Becker, P. K. Behera, J. V. Bennett, E. Bernieri, F. U. Bernlochner, M. Bertemes, M. Bessner, S. Bettarini, V. Bhardwaj, F. Bianchi, T. Bilka, S. Bilokin, D. Biswas, M. Bračko, P. Branchini, N. Braun, T. E. Browder, A. Budano, S. Bussino, M. Campajola, G. Casarosa, C. Cecchi, D. Červenkov, M.-C. Chang, P. Chang, R. Cheaib, V. Chekelian, B. G. Cheon, K. Chilikin, K. Chirapatpimol, H.-E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, D. Cinabro, L. Corona, L. M. Cremaldi, S. Cunliffe, N. Dash, F. Dattola, E. De La Cruz-Burelo, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, A. De Yta-Hernandez, F. Di Capua, Z. Doležal, T. V. Dong, K. Dort, D. Dossett, G. Dujany, S. Eidelman, T. Ferber, D. Ferlewicz, S. Fiore, A. Fodor, F. Forti, B. G. Fulsom, E. Ganiev, R. Garg, A. Garmash, V. Gaur, A. Gaz, U. Gebauer, A. Gellrich, T. Geßler, R. Giordano, A. Giri, B. Gobbo, R. Godang, P. Goldenzweig, B. Golob, P. Gomis, W. Gradl, E. Graziani, D. Greenwald, C. Hadjivasiliou, S. Halder, O. Hartbrich, K. Hayasaka, H. Hayashii, C. Hearty, M. T. Hedges, I. Heredia de la Cruz, M. Hernández Villanueva, A. Hershenhorn, T. Higuchi, E. C. Hill, H. Hirata, M. Hoek, M. Hohmann, C.-L. Hsu, Y. Hu, K. Inami, G. Inguglia, J. Irakkathil Jabbar, A. Ishikawa, R. Itoh, P. Jackson, W. W. Jacobs, D. E. Jaffe, E.-J. Jang, S. Jia, Y. Jin, C. Joo, A. B. Kaliyar, J. Kandra, G. Karyan, Y. Kato, H. Kichimi, C. Kiesling, C.-H. Kim, D. Y. Kim, H. J. Kim, S.-H. Kim, Y.-K. Kim, T. D. Kimmel, K. Kinoshita, C. Kleinwort, P. Kodyš, T. Koga, S. Kohani, I. Komarov, S. Korpar, T. M. G. Kraetzschmar, P. Križan, P. Krokovny, T. Kuhr, M. Kumar, R. Kumar, K. Kumara, S. Kurz, Y.-J. Kwon, S. Lacaprara, C. La Licata, L. Lanceri, J. S. Lange, I.-S. Lee, S. C. Lee, P. Leitl, D. Levit, P. M. Lewis, C. Li, L. K. Li, Y. B. Li, J. Libby, K. Lieret, L. Li Gioi, Z. Liptak, Q. Y. Liu, D. Liventsev, S. Longo, T. Luo, C. MacQueen, Y. Maeda, R. Manfredi, E. Manoni, S. Marcello, C. Marinas, A. Martini, M. Masuda, K. Matsuoka, D. Matvienko, F. Meggendorfer, F. Meier, M. Merola, F. Metzner, M. Milesi, C. Miller, K. Miyabayashi, R. Mizuk, K. Azmi, G. B. Mohanty, H.-G. Moser, M. Mrvar, F. J. Müller, R. Mussa, I. Nakamura, M. Nakao, H. Nakazawa, A. Natochii, C. Niebuhr, N. K. Nisar, S. Nishida, M. H. A. Nouxman, K. Ogawa, S. Ogawa, H. Ono, P. Oskin, H. Ozaki, P. Pakhlov, A. Paladino, A. Panta, E. Paoloni, S. Pardi, H. Park, S.-H. Park, B. Paschen, A. Passeri, A. Pathak, S. Patra, S. Paul, T. K. Pedlar, I. Peruzzi, R. Peschke, M. Piccolo, L. E. Piilonen, G. Polat, V. Popov, C. Praz, E. Prencipe, M. T. Prim, M. V. Purohit, N. Rad, P. Rados, R. Rasheed, M. Reif, S. Reiter, M. Remnev, I. Ripp-Baudot, M. Ritter, M. Ritzert, G. Rizzo, S. H. Robertson, D. Rodríguez Pérez, J. M. Roney, C. Rosenfeld, A. Rostomyan, N. Rout, D. Sahoo, Y. Sakai, D. A. Sanders, S. Sandilya, A. Sangal, L. Santelj, Y. Sato, V. Savinov, B. Scavino, C. Schwanda, A. J. Schwartz, R. M. Seddon, Y. Seino, A. Selce, K. Senyo, J. Serrano, M. E. Sevior, C. Sfienti, J.-G. Shiu, A. Sibidanov, F. Simon, R. J. Sobie, A. Soffer, E. Solovieva, S. Spataro, B. Spruck, M. Starič, S. Stefkova, Z. S. Stottler, R. Stroili, J. Strube, M. Sumihama, T. Sumiyoshi, D. J. Summers, W. Sutcliffe, H. Svidras, M. Tabata, M. Takizawa, U. Tamponi, S. Tanaka, K. Tanida, H. Tanigawa, P. Taras, F. Tenchini, D. Tonelli, E. Torassa, K. Trabelsi, M. Uchida, T. Uglov, K. Unger, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, S. E. Vahsen, R. van Tonder, G. S. Varner, K. E. Varvell, A. Vinokurova, L. Vitale, E. Waheed, M. Wakai, H. M. Wakeling, C. H. Wang, M.-Z. Wang, X. L. Wang, A. Warburton, M. Watanabe, S. Watanuki, J. Webb, S. Wehle, M. Welsch, C. Wessel, J. Wiechczynski, H. Windel, E. Won, L. J. Wu, X. P. Xu, B. Yabsley, W. Yan, S. B. Yang, H. Ye, M. Yonenaga, C. Z. Yuan, Y. Yusa, L. Zani, Q. D. Zhou, V. I. Zhukova

    Physical Review Letters   125 ( 16 )   161806 - 161806   2020年10月

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    記述言語:英語   出版者・発行元:American Physical Society.  

    We present a search for the direct production of a light pseudoscalar a decaying into two photons with the Belle II detector at the SuperKEKB collider. We search for the process e⁺e⁻ → γa, a → γγ in the mass range 0.2 < ma < 9.7 GeV/c² using data corresponding to an integrated luminosity of (445±3) pb⁻¹. Light pseudoscalars interacting predominantly with standard model gauge bosons (so-called axionlike particles or ALPs) are frequently postulated in extensions of the standard model. We find no evidence for ALPs and set 95% confidence level upper limits on the coupling strength gaγγ of ALPs to photons at the level of 10⁻³ GeV⁻¹. The limits are the most restrictive to date for 0.2 < ma < 1 GeV/c².

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  • Measurement of the $B^0$ lifetime using fully reconstructed hadronic decays in the 2019 Belle II dataset

    Belle II Collaboration, F. Abudinén, I. Adachi, R. Adak, K. Adamczyk, P. Ahlburg, J. K. Ahn, H. Aihara, N. Akopov, A. Aloisio, F. Ameli, L. Andricek, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, V. Aushev, T. Aziz, V. Babu, S. Bacher, S. Baehr, S. Bahinipati, A. M. Bakich, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, W. Bartel, G. Batignani, J. Baudot, A. Beaulieu, J. Becker, P. K. Behera, M. Bender, J. V. Bennett, E. Bernieri, F. U. Bernlochner, M. Bertemes, M. Bessner, S. Bettarini, V. Bhardwaj, B. Bhuyan, F. Bianchi, T. Bilka, S. Bilokin, D. Biswas, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, P. Branchini, N. Braun, R. A. Briere, T. E. Browder, D. N. Brown, A. Budano, L. Burmistrov, S. Bussino, M. Campajola, L. Cao, G. Caria, G. Casarosa, C. Cecchi, D. Červenkov, M. -C. Chang, P. Chang, R. Cheaib, V. Chekelian, Y. Q. Chen, Y. -T. Chen, B. G. Cheon, K. Chilikin, H. -E. Cho, K. Cho, S. -J. Cho, S. -K. Choi, S. Choudhury, D. Cinabro, L. Corona, L. M. Cremaldi, D. Cuesta, S. Cunliffe, T. Czank, N. Dash, F. Dattola, E. De La Cruz-Burelo, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, B. Deschamps, M. Destefanis, S. Dey, A. De Yta-Hernandez, F. Di Capua, S. Di Carlo, J. Dingfelder, Z. Doležal, I. Domínguez Jiménez, T. V. Dong, K. Dort, D. Dossett, S. Dubey, S. Duell, G. Dujany, S. Eidelman, M. Eliachevitch, D. Epifanov, J. E. Fast, T. Ferber, D. Ferlewicz, G. Finocchiaro, S. Fiore, P. Fischer, A. Fodor, F. Forti, A. Frey, M. Friedl, B. G. Fulsom, M. Gabriel, N. Gabyshev, E. Ganiev, M. Garcia-Hernandez, R. Garg, A. Garmash, V. Gaur, A. Gaz, U. Gebauer, M. Gelb, A. Gellrich, J. Gemmler, T. Geßler, D. Getzkow, R. Giordano, A. Giri, A. Glazov, B. Gobbo, R. Godang, P. Goldenzweig, B. Golob, P. Gomis, P. Grace, W. Gradl, E. Graziani, D. Greenwald, Y. Guan, C. Hadjivasiliou, S. Halder, K. Hara, T. Hara, O. Hartbrich, T. Hauth, K. Hayasaka, H. Hayashii, C. Hearty, M. Heck, M. T. Hedges, I. Heredia de la Cruz, M. Hernández Villanueva, A. Hershenhorn, T. Higuchi, E. C. Hill, H. Hirata, S. Hirose, M. Hoek, M. Hohmann, S. Hollitt, T. Hotta, C. -L. Hsu, Y. Hu, K. Huang, T. Iijima, K. Inami, G. Inguglia, J. Irakkathil Jabbar, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, S. Iwata, P. Jackson, W. W. Jacobs, I. Jaegle, D. E. Jaffe, E. -J. Jang, M. Jeandron, H. B. Jeon, S. Jia, Y. Jin, C. Joo, K. K. Joo, I. Kadenko, J. Kahn, H. Kakuno, A. B. Kaliyar, J. Kandra, K. H. Kang, P. Kapusta, G. Karyan, Y. Kato, H. Kawai, T. Kawasaki, T. Keck, C. Ketter, H. Kichimi, C. Kiesling, B. H. Kim, C. -H. Kim, D. Y. Kim, H. J. Kim, J. B. Kim, K. -H. Kim, K. Kim, S. -H. Kim, Y. -K. Kim, Y. Kim, T. D. Kimmel, H. Kindo, K. Kinoshita, B. Kirby, C. Kleinwort, B. Knysh, P. Kodyš, T. Koga, S. Kohani, S. Koirala, I. Komarov, T. Konno, S. Korpar, E. Kou, N. Kovalchuk, T. M. G. Kraetzschmar, P. Križan, R. Kroeger, J. F. Krohn, P. Krokovny, H. Krüger, W. Kuehn, T. Kuhr, J. Kumar, M. Kumar, R. Kumar, K. Kumara, T. Kumita, T. Kunigo, M. Künzel, S. Kurz, A. Kuzmin, P. Kvasnička, Y. -J. Kwon, S. Lacaprara, Y. -T. Lai, C. La Licata, K. Lalwani, L. Lanceri, J. S. Lange, K. Lautenbach, P. J. Laycock, F. R. Le Diberder, I. -S. Lee, S. C. Lee, P. Leitl, D. Levit, P. M. Lewis, C. Li, L. K. Li, S. X. Li, Y. M. Li, Y. B. Li, J. Libby, K. Lieret, L. Li Gioi, J. Lin, Z. Liptak, Q. Y. Liu, Z. A. Liu, D. Liventsev, S. Longo, A. Loos, P. Lu, M. Lubej, T. Lueck, F. Luetticke, T. Luo, C. MacQueen, Y. Maeda, M. Maggiora, S. Maity, R. Manfredi, E. Manoni, S. Marcello, C. Marinas, A. Martini, M. Masuda, T. Matsuda, K. Matsuoka, D. Matvienko, J. McNeil, F. Meggendorfer, J. C. Mei, F. Meier, M. Merola, F. Metzner, M. Milesi, C. Miller, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, K. Azmi, G. B. Mohanty, H. Moon, T. Moon, J. A. Mora Grimaldo, A. Morda, T. Morii, H. -G. Moser, M. Mrvar, F. Mueller, F. J. Müller, Th. Muller, G. Muroyama, R. Mussa, K. Nakagiri, I. Nakamura, K. R. Nakamura, E. Nakano, M. Nakao, H. Nakayama, H. Nakazawa, T. Nanut, Z. Natkaniec, M. Nayak, G. Nazaryan, D. Neverov, C. Niebuhr, M. Niiyama, J. Ninkovic, N. K. Nisar, S. Nishida, K. Nishimura, M. Nishimura, M. H. A. Nouxman, B. Oberhof, K. Ogawa, S. Ogawa, S. L. Olsen, Y. Onishchuk, H. Ono, Y. Onuki, P. Oskin, E. R. Oxford, H. Ozaki, P. Pakhlov, G. Pakhlova, A. Paladino, T. Pang, A. Panta, E. Paoloni, C. Park, H. Park, S. -H. Park, B. Paschen, A. Passeri, A. Pathak, S. Patra, S. Paul, T. K. Pedlar, I. Peruzzi, R. Peschke, R. Pestotnik, M. Piccolo, L. E. Piilonen, P. L. M. Podesta-Lerma, V. Popov, C. Praz, E. Prencipe, M. T. Prim, M. V. Purohit, P. Rados, R. Rasheed, M. Reif, S. Reiter, M. Remnev, P. K. Resmi, I. Ripp-Baudot, M. Ritter, M. Ritzert, G. Rizzo, L. B. Rizzuto, S. H. Robertson, D. Rodríguez Pérez, J. M. Roney, C. Rosenfeld, A. Rostomyan, N. Rout, M. Rozanska, S. Rummel, G. Russo, D. Sahoo, Y. Sakai, D. A. Sanders, S. Sandilya, A. Sangal, L. Santelj, P. Sartori, J. Sasaki, Y. Sato, V. Savinov, B. Scavino, M. Schram, H. Schreeck, J. Schueler, C. Schwanda, A. J. Schwartz, B. Schwenker, R. M. Seddon, Y. Seino, A. Selce, K. Senyo, I. S. Seong, M. E. Sevior, C. Sfienti, V. Shebalin, C. P. Shen, H. Shibuya, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, J. B. Singh, S. Skambraks, K. Smith, R. J. Sobie, A. Soffer, A. Sokolov, Y. Soloviev, E. Solovieva, S. Spataro, B. Spruck, M. Starič, S. Stefkova, Z. S. Stottler, R. Stroili, J. Strube, J. Stypula, M. Sumihama, K. Sumisawa, T. Sumiyoshi, D. J. Summers, W. Sutcliffe, K. Suzuki, S. Y. Suzuki, M. Tabata, M. Takahashi, M. Takizawa, U. Tamponi, S. Tanaka, K. Tanida, H. Tanigawa, N. Taniguchi, Y. Tao, P. Taras, F. Tenchini, D. Tonelli, E. Torassa, K. Trabelsi, T. Tsuboyama, N. Tsuzuki, M. Uchida, I. Ueda, S. Uehara, T. Ueno, T. Uglov, K. Unger, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, S. E. Vahsen, R. van Tonder, G. S. Varner, K. E. Varvell, A. Vinokurova, L. Vitale, V. Vorobyev, A. Vossen, E. Waheed, H. M. Wakeling, K. Wan, W. Wan Abdullah, B. Wang, C. H. Wang, M. -Z. Wang, X. L. Wang, A. Warburton, M. Watanabe, S. Watanuki, I. Watson, J. Webb, S. Wehle, M. Welsch, C. Wessel, J. Wiechczynski, P. Wieduwilt, H. Windel, E. Won, L. J. Wu, X. P. Xu, B. Yabsley, S. Yamada, W. Yan, S. B. Yang, H. Ye, J. Yelton, I. Yeo, J. H. Yin, M. Yonenaga, Y. M. Yook, T. Yoshinobu, C. Z. Yuan, G. Yuan, W. Yuan, Y. Yusa, L. Zani, J. Z. Zhang, Y. Zhang, Z. Zhang, V. Zhilich, Q. D. Zhou, X. Y. Zhou, V. I. Zhukova, V. Zhulanov, A. Zupanc

    Physical Review D   107 ( 9 )   2020年5月

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    This document presents the measurement of $B^0$ meson lifetimes using the
    2019 Belle II dataset that corresponds to an integrated luminosity of $8.7 \pm
    0.2$ fb$^{-1}$. Each candidate is fully reconstructed with hadronic decay final
    states on the signal side, while the rest-of-event technique allows to infer
    the decay vertex position on the other (tag) side. $B^0$ lifetime is extracted
    from an unbinned maximum likelihood fit to the distribution of the difference
    between the signal side $B^0$ candidate and the tag side decay times. The
    measured lifetime is $\tau_{B^0} = 1.48 \pm 0.28 \pm 0.06 $ ps, where the first
    uncertainty is statistical and the second is systematic.

    DOI: 10.1103/PhysRevD.107.L091102

    Scopus

    arXiv

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    その他リンク: http://arxiv.org/pdf/2005.07507v2

  • Observation of the Radiative Decays of ϒ(1S) to χ_{c1}. 国際誌

    P Katrenko, I Adachi, H Aihara, S Al Said, D M Asner, T Aushev, I Badhrees, S Bahinipati, P Behera, C Beleño, J Bennett, V Bhardwaj, B Bhuyan, J Biswal, A Bobrov, G Bonvicini, M Bračko, M Campajola, L Cao, D Červenkov, V Chekelian, A Chen, B G Cheon, K Chilikin, H E Cho, K Cho, S-K Choi, Y Choi, S Choudhury, D Cinabro, S Cunliffe, F Di Capua, S Di Carlo, Z Doležal, T V Dong, S Eidelman, D Epifanov, J E Fast, B G Fulsom, R Garg, V Gaur, N Gabyshev, A Garmash, A Giri, P Goldenzweig, B Golob, O Grzymkowska, O Hartbrich, K Hayasaka, H Hayashii, W-S Hou, T Iijima, K Inami, A Ishikawa, R Itoh, M Iwasaki, Y Iwasaki, W W Jacobs, H B Jeon, S Jia, Y Jin, D Joffe, K K Joo, G Karyan, H Kichimi, D Y Kim, K T Kim, S H Kim, K Kinoshita, P Kodyš, S Korpar, P Križan, R Kroeger, T Kuhr, I S Lee, S C Lee, P Lewis, Y B Li, L Li Gioi, J Libby, K Lieret, C MacQueen, M Masuda, T Matsuda, D Matvienko, M Merola, K Miyabayashi, H Miyata, R Mizuk, G B Mohanty, T J Moon, T Mori, R Mussa, E Nakano, T Nakano, M Nakao, M Nayak, N K Nisar, S Nishida, K Nishimura, H Ono, Y Onuki, P Oskin, P Pakhlov, G Pakhlova, T Pang, S Pardi, C W Park, H Park, S-H Park, S Paul, T K Pedlar, R Pestotnik, L E Piilonen, V Popov, E Prencipe, M T Prim, M Ritter, A Rostomyan, N Rout, G Russo, D Sahoo, Y Sakai, S Sandilya, T Sanuki, V Savinov, O Schneider, G Schnell, J Schueler, C Schwanda, Y Seino, K Senyo, M E Sevior, C P Shen, J-G Shiu, E Solovieva, M Starič, Z S Stottler, T Sumiyoshi, W Sutcliffe, M Takizawa, U Tamponi, K Tanida, F Tenchini, K Trabelsi, M Uchida, S Uehara, T Uglov, Y Unno, S Uno, P Urquijo, Y Usov, R Van Tonder, G Varner, A Vossen, B Wang, C H Wang, M-Z Wang, P Wang, X L Wang, E Won, S B Yang, H Ye, J Yelton, J H Yin, C Z Yuan, Y Yusa, Z P Zhang, V Zhilich, V Zhukova

    Physical review letters   124 ( 12 )   122001 - 122001   2020年3月

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    記述言語:英語  

    We report the first observation of the radiative decay of the ϒ(1S) into a charmonium state. The significance of the observed signal of ϒ(1S)→γχ_{c1} is 6.3 standard deviations including systematics. The branching fraction is calculated to be B[ϒ(1S)→γχ_{c1}]=[4.7_{-1.8}^{+2.4}(stat)_{-0.5}^{+0.4}(sys)×10^{-5}]. We also searched for ϒ(1S) radiative decays into χ_{c0,2} and η_{c}(1S,2S), and set upper limits on their branching fractions. These results are obtained from a 24.9  fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider at a center-of-mass energy equal to the ϒ(2S) mass using ϒ(1S) tagging by the ϒ(2S)→ϒ(1S)π^{+}π^{-} transitions.

    DOI: 10.1103/PhysRevLett.124.122001

    PubMed

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  • 水制の模型実験による畳み込みスパース符号化動的モード分解の性能評価

    新井裕介, 金子侑平, 村松正吾, 安田浩保, 早坂圭司, 大竹雄

    電子情報通信学会技術研究報告   119 ( 440(SIP2019 103-169) )   2020年

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  • 河川流路変動の解明と制御のためのサイバーフィジカルプロトタイプシステム構築

    内藤勇鷹, 村松正吾, 安田浩保, 早坂圭司, 大竹雄

    映像情報メディア学会技術報告   44 ( 20(ME2020 88-101) )   2020年

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  • Optical-Flowを用いた表面流速測定手法の開発と移動床における適用性の検証

    茂木大知, 安田浩保, 早坂圭司, 村松正吾

    第37回土木学会関東支部新潟会研究調査発表会   2019年11月

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    記述言語:日本語  

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  • 河床波の伝播速度の時空間分布の理論的な評価

    石原道秀, 安田浩保, 村松正吾, 早坂圭司

    第37回土木学会関東支部新潟会研究調査発表会   2019年11月

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    記述言語:日本語  

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  • Convolutional-Sparse-Coded Dynamic Mode Decomposition and Its Application to River State Estimation

    Yuhei Kaneko, Shogo Muramatsu, Hiroyasu Yasuda, Kiyoshi Hayasaka, Yu Otake, Shunsuke Ono, Masahiro Yukawa

    2018年11月

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    This work proposes convolutional-sparse-coded dynamic mode decomposition (CSC-DMD) by unifying extended dynamic mode decomposition (EDMD) and convolutional sparse coding. EDMD is a data driven analysis method for describing a nonlinear dynamical system with a linear time-evolution equation. Compared with existing EDMD methods, CSC-DMD has an advantage of reflecting spatial structure of the target. As an example, the proposed method is applied to river bed shape estimation from the water surface observation. The estimation problem is reduced to sparsity-aware restoration with a hard constraint, which is given by the CSC-DMD prediction, where the algorithm is derived by the primal-dual splitting method. A time series set of water surface and bed shape measured through an experimental river setup is used to train and test the system. From the result, the significance of the proposed method is verified.

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  • 能生川における河道内の脆弱点の推定

    安田浩保, 石原道秀, 五十嵐拓実, 村松正吾, 早坂圭司

    第36回土木学会関東支部新潟会研究調査発表会   2018年11月

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  • 交互砂州上の流れにおける摩擦損失の定量化

    齋藤選, 安田浩保, 早坂圭司

    第36回土木学会関東支部新潟会研究調査発表会   2018年11月

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  • 畳込みスパース符号化を利用した拡張動的モード分解

    村松正吾, 安田浩保, 早坂圭司, 大竹雄, 小野峻佑, 湯川正裕

    第33回信号処理シンポジウム   2018年11月

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  • 交互砂州の流下状態の理論的評価について

    石原道秀, 安田浩保, 村松正吾, 早坂圭司

    第36回土木学会関東支部新潟会研究調査発表会   2018年11月

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  • 砂州の発生・発達過程における表面流速の計測法の開発

    茂木大知, 安田浩保, 村松正吾, 早坂圭司

    第36回土木学会関東支部新潟会研究調査発表会   2018年11月

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  • 動的モード分解による河川状態のデータ駆動モデリング

    金子侑平, 安田浩保, 早坂圭司, 村松正吾

    電子情報通信学会ソサイエティ大会   2018年9月

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    記述言語:日本語  

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  • 動的モード分解による河川データ分析

    伊郷恭平, 村松正吾, 安田浩保, 早坂圭司

    電子情報通信学会信号処理研究会   2018年8月

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  • Evidence of charged $Ξ_{c}(2930)$ and updated measurement of $B^{0} \to K^{0} Λ_{c}^{+} \barΛ_{c}^{-}$ at Belle

    Belle Collaboration, Y. B. Li, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, Y. Ban, V. Bansal, P. Behera, C. Beleno, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bracko, T. E. Browder, L. Cao, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. -K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, J. Dingfelder, Z. Dolezal, T. V. Dong, Z. Drasal, S. Eidelman, D. Epifanov, J. E. Fast, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, B. Golob, J. Haba, K. Hayasaka, S. Hirose, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, Y. Kato, T. Kawasaki, D. Y. Kim, J. B. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, Y. -J. Kwon, J. S. Lange, I. S. Lee, S. C. Lee, L. K. Li, L. Li Gioi, J. Libby, D. Liventsev, T. Luo, D. Matvienko, M. Merola, H. Miyata, R. Mizuk, H. K. Moon, T. Mori, R. Mussa, E. Nakano, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, K. Nishimura, K. Ogawa, S. Okuno, H. Ono, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, V. Popov, E. Prencipe, A. Rostomyan, G. Russo, Y. Sakai, M. Salehi, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, T. -A. Shibata, J. -G. Shiu, E. Solovieva, M. Starič, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, R. Van Tonder, G. Varner, K. E. Varvell, V. Vorobyev, E. Waheed, B. Wang, C. H. Wang, M, Z. Wang, P. Wang, X. L. Wang, S. Watanuki, E. Widmann, E. Won, H. Ye, J. Yelton, J. H. Yin, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov

    2018年6月

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    掲載種別:機関テクニカルレポート,技術報告書,プレプリント等  

    We report evidence for the charged charmed-strange baryon $\Xi_{c}(2930)$<br />
    with a signal significance of 3.9$\sigma$. The charged $\Xi_{c}(2930)$ is found<br />
    in its decay to $K_{S}^{0} \Lambda_{c}$ in the substructure of $B^{0} \to<br />
    K^{0}_{S} \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-}$ decays. The measured mass and<br />
    width are $[2942.3 \pm 4.4 (\rm stat.) \pm 1.6(\rm syst.)]$~MeV/$c^{2}$ and<br />
    $[14.8 \pm 8.8(\rm stat.) \pm 7.1(\rm syst.)]$~MeV, respectively, and the<br />
    product branching fraction is ${\cal B}(B^{0} \to \Xi_{c}^{+}(2930)<br />
    \bar{\Lambda}_{c}^{-}) {\cal B}(\Xi_{c}^{+}(2930)\to K^{0}<br />
    \Lambda_{c}^{+})=[2.28 \pm 0.49(\rm stat.) \pm 0.29(\rm syst.)]\times 10^{-4}$.<br />
    We also measure ${\cal B}(B^{0} \to K^{0} \Lambda_{c}^{+}<br />
    \bar{\Lambda}_{c}^{-}) = [3.84 \pm 0.73(\rm stat.) \pm 0.48(\rm syst.)] \times<br />
    10^{-4}$ with greater precision than previous experiments, and present the<br />
    results of a search for the charmonium-like state $Y(4660)$ and its spin<br />
    partner, $Y_{\eta}$, in the $\Lambda_{c}^{+}\bar{\Lambda}_{c}^{-}$ invariant<br />
    mass spectrum. No clear signals of the $Y(4660)$ or $Y_{\eta}$ are observed and<br />
    the 90\% credibility level (C.L.) upper limits on their production rates are<br />
    determined. These measurements are obtained from a sample of $(772\pm11)\times<br />
    10^{6} B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance by the Belle<br />
    detector at the KEKB asymmetric energy electron-positron collider.

    arXiv

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  • Publisher's Note: Search for B -> hvv decays with semileptonic tagging at Belle (vol 96, 091101, 2017)

    J. Grygier, P. Goldenzweig, M. Heck, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Dolezal, Z. Drasal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, R. Gillard, B. Golob, O. Grzymkowska, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, T. Julius, J. Kahn, A. B. Kaliyar, K. H. Kang, G. Karyan, P. Katrenko, T. Kawasaki, T. Keck, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, D. Kotchetkov, P. Krizan, P. Krokovny, T. Kuhr, R. Kulasiri, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, F. Metzner, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, H. Ono, Y. Onuki, G. Pakhlova, B. Pal, C. -S. Park, C. W. Park, H. Park, S. Paul, T. K. Pedlar, L. Pesantez, L. E. Piilonen, M. Prim, C. Pulvermacher, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, T. Schlueter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, I. S. Seong, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, E. Solovieva, M. Staric, J. F. Strube, T. Sumiyoshi, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, T. Tsuboyama, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, C. Van Hulse, G. Varner, V. Vorobyev, A. Vossen, E. Waheed, B. Wang, C. H. Wang, M. -Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, S. Wehle, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, H. Ye, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, M. Ziegler, A. Zupanc

    PHYSICAL REVIEW D   97 ( 9 )   2018年5月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    DOI: 10.1103/PhysRevD.97.099902

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  • 平成29年九州北部豪雨における群発表層崩壊の発生要因

    齋藤選, 五十嵐拓実, 安田浩保, 早坂圭司, 村松正吾

    第35回 土木学会関東支部新潟会 研究調査発表会   2017年11月

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  • 交互砂州発達過程における2 次元浅水流モデルの適用性

    齋藤選, 五十嵐拓実, 安田浩保, 早坂圭司, 村松正吾

    第35回 土木学会関東支部新潟会 研究調査発表会   2017年11月

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  • 河床状態推定のための水面観測モデルの検討

    安康, 村松 正吾, 安田 浩保, 早坂 圭司

    電気学会東京支部新潟支所大会   2017年11月

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  • スパース表現による河床状態推定の検討

    伊郷恭平, 村松正吾, 安田浩保, 早坂圭司

    電子情報通信学会信越支部大会   2017年10月

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    記述言語:日本語  

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  • Search for a massive invisible particle $X^0$ in $B^{+}\to e^{+}X^{0}$ and $B^{+}\to μ^{+}X^{0}$ decays

    C. -S. Park, Y. -J. Kwon, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, P. Behera, V. Bhardwaj, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, Z. Doležal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, O. Grzymkowska, T. Hara, K. Hayasaka, H. Hayashii, M. Heck, W. -S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, H. B. Jeon, T. Julius, K. H. Kang, E. Kato, P. Katrenko, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, P. Kodys, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, I. S. Lee, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, K. J. Nath, M. Nayak, K. Negishi, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, T. K. Pedlar, M. Petrič, L. E. Piilonen, C. Pulvermacher, M. V. Purohit, J. Rauch, M. Ritter, A. Rostomyan, S. Ryu, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, T. Schlüter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, B. Shwartz, F. Simon, A. Sokolov, S. Stanič, M. Starič, J. Stypula, T. Sumiyoshi, U. Tamponi, Y. Teramoto, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, M. N. Wagner, C. H. Wang, M, Z. Wang, P. Wang, Y. Watanabe, E. Won, J. Yamaoka, S. Yashchenko, H. Ye, Y. Yook, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    Phys. Rev. D 94, 012003 (2016)   80 ( 5 )   983 - 986   2017年9月

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    記述言語:英語   掲載種別:機関テクニカルレポート,技術報告書,プレプリント等  

    We present a search for a non-Standard-Model invisible particle $X^0$ in the<br />
    mass range $0.1\textrm{-}1.8 \,{\rm GeV}/{c^2}$ in $B^{+}\to e^{+} X^{0}$ and<br />
    $B^{+}\to \mu^{+} X^{0}$ decays. The results are obtained from a $711~{\rm<br />
    fb}^{-1}$ data sample that corresponds to $772 \times 10^{6} B\bar{B}$ pairs,<br />
    collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB<br />
    $e^+ e^-$ collider. One $B$ meson is fully reconstructed in a hadronic mode to<br />
    determine the momentum of the lepton of the signal decay in the rest frame of<br />
    the recoiling partner $B$ meson. We find no evidence of a signal and set upper<br />
    limits on the order of $10^{-6}$.

    DOI: 10.1134/S1063778817050209

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  • Erratum to: Search for B decays to final states with the η c meson (Journal of High Energy Physics, (2015), 2015, 6, (132), 10.1007/JHEP06(2015)132)

    A. Vinokurova, A. Kuzmin, S. Eidelman, A. Abdesselam, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, A. M. Bakich, V. Bansal, V. Bhardwaj, B. Bhuyan, A. Bobrov, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, V. Chekelian, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, S. K. Choi, Y. Choi, D. Cinabro, J. Dingfelder, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, X. H. He, W. S. Hou, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, D. Joffe, T. Julius, K. H. Kang, E. Kato, C. Kiesling, D. Y. Kim, H. J. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, Y. J. Kwon, J. S. Lange, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, G. B. Mohanty, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, C. Ng, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar

    Journal of High Energy Physics   2017 ( 2 )   2017年2月

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    © 2017, The Author(s). (Figure presented.)Figure 1. Corrected figure 10. The combined fit projections of the ηcη invariant mass distributions in case of the η→γ γ(left) and η→ π+π-π0 (right) modes corresponding to the search for the X(3915) resonance. (Figure presented.) Figure 2. Corrected figure 11. The ηcπ0 invariant mass distribution corresponding to the search for the X(3915) resonance. We have found an error in the fit of the ηcη and ηcπ0 invariant masses that is used to search for the X(3915) state. The corrected fits are shown in figures 1 and 2. The resonance parameters are fixed to the world average values (3918 MeV/c2 and 20 MeV/c2 for mass and width correspondingly). The fit results are summarized in table 1. Changes in the fits of the X(3915) resonance lead to changes of the corresponding upper limits. The corrected upper limits on the X(3915) production and decay branching fraction products are summarized in table 2. All other results of the paper are correct. (Table presented.) Table 2. Corrected entry of table 8. Results of branching fraction measurements for the B decays containing intermediate X(3915).

    DOI: 10.1007/JHEP02(2017)088

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  • Measurements of the Υ(10860) and Υ(11020) resonances via σ (e+e- → Υ(nS)π+π-)

    D. Santel, K. Kinoshita, P. Chang, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, K. Arinstein, D. M. Asner, T. Aushev, R. Ayad, A. M. Bakich, V. Bansal, B. Bhuyan, A. Bobrov, A. Bondar, G. Bonvicini, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, J. Dingfelder, Z. DoleŽal, Z. Drásal, A. Drutskoy, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, Y. M. Goh, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X. H. He, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, T. Julius, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, B. R. Ko, P. Kodyš, S. Korpar, P. KriŽan, P. Krokovny, A. Kuzmin, J. S. Lange, I. S. Lee, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen

    Physical Review D   93 ( 1 )   2016年1月

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    © 2016 American Physical Society. We report new measurements of the total cross sections for e+e-→(nS)π+π- (n=1, 2, 3) and e+e-→bb¯ from a high-luminosity fine scan of the region s=10.63-11.05 GeV with the Belle detector. We observe that the (nS)π+π- spectra have little or no nonresonant component and extract from them the masses and widths of (10860) and (11020) and their relative phase. We find M10860=(10891.1±3.2-1.7+0.6) MeV/c2 and Γ10860=(53.7-5.6 -5.4+7.1 +1.3) MeV and report first measurements M11020=(10987.5-2.5 -2.1+6.4 +9.0) MeV/c2, Γ11020=(61-19 -20+9 +2) MeV, and φ11020-φ10860=(-1.0±0.4-0.1+1.4) rad.

    DOI: 10.1103/PhysRevD.93.011101

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  • Semi-inclusive studies of semileptonic B-s decays at Belle

    C. Oswald, P. Urquijo, J. Dingfelder, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bhardwaj, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, D. Cervenkov, M. -C. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, Z. Dolezal, Z. Drasal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, O. Frost, B. G. Fulsom, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, Y. M. Goh, P. Goldenzweig, B. Golob, O. Grzymkowska, T. Hara, J. Hasenbusch, K. Hayasaka, H. Hayashii, X. H. He, W. -S. Hou, M. Huschle, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, T. Julius, K. H. Kang, P. Kapusta, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodys, S. Korpar, P. Krizan, P. Krokovny, T. Kuhr, T. Kumita, Y. -J. Kwon, J. S. Lange, D. H. Lee, I. S. Lee, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. K. Moon, E. Nakano, M. Nakao, H. Nakazawa, T. Nanut, Z. Natkaniec, M. Nayak, S. Nishida, T. Nozaki, S. Okuno, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, T. K. Pedlar, L. Pesantez, R. Pestotnik, M. Petric, L. E. Piilonen, C. Pulvermacher, E. Ribezl, M. Ritter, A. Rostomyan, M. Rozanska, S. Ryu, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, J. -G. Shiu, A. Sibidanov, F. Simon, Y. -S. Sohn, E. Solovieva, S. Stanic, M. Staric, J. Stypula, M. Sumihama, T. Sumiyoshi, U. Tamponi, Y. Teramoto, K. Trabelsi, M. Uchida, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, M. -Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, H. Yamamoto, S. Yashchenko, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

    PHYSICAL REVIEW D   92 ( 7 )   2015年10月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We present an analysis of the semi-inclusive decays B-s -&gt; D(s)(-)Xl(+)nu and B-s -&gt; D-s*(-)Xl(+)nu, where X denotes a final state that may consist of additional hadrons or photons and l is an electron or muon. The studied Bs decays are contained in the 121.4 fb(-1) Upsilon(5S) data sample collected by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The branching fractions of the decays are measured to be B(B-s -&gt; D(s)(-)Xl(+)nu) = [8.2 +/- 0.2(stat) +/- 0.6(syst) +/- 1.4(ext)] % and B(B-s -&gt; D-s*(-)Xl(+)nu) = [5.4 +/- 0.4(stat) +/- 0.4(syst) +/- 0.9(ext)] %, where the first two uncertainties are statistical and systematic and the last is due to external parameters. The measurement also provides an estimate of the B-s(()*())(B) over bar (()(s)*()) production cross section, sigma(e(+)e(-) -&gt; B-s(()*())(B) over bar (()(s)*())) = 53.8 +/- 1.4(stat) +/- 4.0(syst) +/- 3.4(ext)] pb, at the center-of-mass energy root s = 10.86 GeV.

    DOI: 10.1103/PhysRevD.92.072013

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  • HFAG τ lepton averages and |V<inf>us</inf>| determination with τ decays 査読

    Alberto Lusiani, Marcin Chrzaszcz, Kiyoshi Hayasaka, Hisaki Hayashii, J. Michael Roney, Boris Shwartz, Swagato Banerjee

    Nuclear and Particle Physics Proceedings   260   32 - 39   2015年3月

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    © 2015 Elsevier B.V. We present an updated HFAG report for the τ lepton, using τ lepton experimental results available up to Summer 2014. World averages are computed for quantities where the HFAG procedures may produce improvements over the PDG compilation. Furthermore, we list the available upper limits on the searches for τ lepton flavor violating (LFV) decays and, for the first time, we provide combined τ LVF upper limits. The τ lepton branching fractions, mass and lifetime are used to test lepton universality for charged weak currents and to compute the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |Vus|.

    DOI: 10.1016/j.nuclphysbps.2015.02.008

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  • Measurement of branching fractions and CP violation parameters in B →ωK decays with first evidence of CP violation in B0 →ω Ks0

    V. Chobanova, J. Dalseno, J. Dalseno, C. Kiesling, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, A. Bala, Y. Ban, K. Belous, B. Bhuyan, A. Bobrov, G. Bonvicini, A. Bozek, M. Bračko, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, Y. Choi, D. Cinabro, M. Danilov, M. Danilov, Z. DoleŽal, Z. Drásal, D. Dutta, K. Dutta, S. Eidelman, S. Esen, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, B. Golob, J. Haba, K. Hayasaka, X. H. He, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, T. Iijima, K. Inami, A. Ishikawa, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, E. Kato, H. Kawai, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, S. Korpar, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, A. Kuzmin, J. S. Lange, S. H. Lee, J. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, R. Mizuk

    Physical Review D - Particles, Fields, Gravitation and Cosmology   90 ( 1 )   2014年7月

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    記述言語:英語  

    We present a measurement of the branching fractions and charge-parity-(CP-)violating parameters in B→ωK decays. The results are obtained from the final data sample containing 772×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the branching fractions B(B0→ωK0)=(4.5±0.4(stat)±0.3(syst))×10-6, B(B+→ωK+)=(6.8±0.4(stat)±0.4(syst))×10-6 which are in agreement with their respective current world averages. For the CP-violating parameters, we obtain AωKS0=-0.36±0.19(stat)±0. 05(syst),SωKS0=+0.91±0.32(stat)±0.05(syst),AωK+=-0. 03±0.04(stat)±0.01(syst), where A and S represent the direct and mixing-induced CP asymmetry, respectively. We find no evidence of CP violation in the decay channel B+→ωK+; however, we obtain the first evidence of CP violation in the B0→ωKS0 decay channel at the level of 3.1 standard deviations. © 2014 American Physical Society.

    DOI: 10.1103/PhysRevD.90.012002

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  • Measurement of time-dependent CP violation in B&lt;sup&gt;0&lt;/sup&gt; → η′K&lt;sup&gt;0&lt;/sup&gt; decays

    A. Zupanc, L. Šantelj, Y. Yusa, A. Abdesselam, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, S. Bahinipati, A. M. Bakich, V. Bansal, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Doležal, Z. Drásal, A. Drutskoy, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, O. Frost, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, X. H. He, T. Higuchi, W. S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, K. K. Joo, H. Kakuno, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, J. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, G. B. Mohanty, A. Moll, T. Mori, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, E. Nedelkovska, N. K. Nisar, S. Nishida

    Journal of High Energy Physics   2014 ( 10 )   2014年

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    © 2014, The Author(s). Abstract: We present a measurement of the time-dependent CP violation parameters in B&lt;sup&gt;0&lt;/sup&gt; → η′K&lt;sup&gt;0&lt;/sup&gt; decays. The measurement is based on the full data sample containing 772 × 10&lt;sup&gt;6&lt;/sup&gt; (Formula Presented.) pairs collected at the Υ(4S) resonance using the Belle detector at the KEKB asymmetric-energy e&lt;sup&gt;+&lt;/sup&gt;e&lt;sup&gt;−&lt;/sup&gt; collider. The measured values of the mixing-induced and direct CP violation parameters are: (Formula Presented.) (Formula Presented.) where the first uncertainty is statistical and the second is systematic. The values obtained are the most accurate to date. Furthermore, these results are consistent with our previous measurements and with the world-average value of sin 2ϕ&lt;inf&gt;1&lt;/inf&gt; measured in B&lt;sup&gt;0&lt;/sup&gt; → J/ψK&lt;sup&gt;0&lt;/sup&gt; decays.

    DOI: 10.1007/JHEP10(2014)165

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  • Measurement of e<sup>+</sup>e<sup>-</sup>→ωπ0, K <sup>*</sup>(892)K̄ and K2*(1430)K̄ at √s near 10.6 GeV

    C. P. Shen, C. Z. Yuan, A. Sibidanov, P. Wang, K. Hayasaka, X. L. Wang, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, A. Bala, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. C. Chang, A. Chen, B. G. Cheon, R. Chistov, I. S. Cho, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, H. Hayashii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, D. H. Kah, J. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, Y. Li, J. Libby, C. Liu, Y. Liu, P. Lukin, D. Matvienko, H. Miyata, R. Mizuk, A. Moll, T. Mori, N. Muramatsu, R. Mussa, Y. Nagasaka, M. Nakao, Z. Natkaniec, M. Nayak, C. Ng, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno

    Physical Review D - Particles, Fields, Gravitation and Cosmology   88 ( 5 )   2013年9月

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    Using data samples of 89 fb-1, 703 fb-1, and 121 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at center-of-mass energies 10.52 GeV, 10.58 GeV, and 10.876 GeV, respectively, we study the exclusive reactions e +e-→ωπ0, K*(892)K̄, and K2*(1430)K̄. (Charge-conjugate modes are included implicitly.) Significant signals of ωπ0, K*(892)0K ̄0, and K2*(1430)-K+ are observed for the first time at these energies, and the energy dependencies of the cross sections are presented. On the other hand, no significant excesses for K *(892)-K+ and K2*(1430) 0K ̄0 are found, and we set limits on the cross section ratios RVP=σB(e+e-→K *(892) 0K̄0)σB(e +e-→K*(892)-K +)&gt;4.3, 20.0, and 5.4, and RTP= σB(e+e-→K2*(1430)0K ̄0)σB(e+e -→K2*(1430)-K+)&lt;1.1, 0.4, and 0.6, for center-of-mass energies of 10.52 GeV, 10.58 GeV, and 10.876 GeV, respectively, at the 90% C.L. © 2013 American Physical Society.

    DOI: 10.1103/PhysRevD.88.052019

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  • Measurements of branching fractions of leptonic and hadronic D<inf>s</inf><sup>+</sup>meson decays and extraction of the D<inf>s</inf><sup>+</sup>meson decay constant

    A. Zupanc, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, A. Bala, B. Bhuyan, G. Bonvicini, A. Bozek, M. Bračko, M. Bračko, J. Brodzicka, T. E. Browder, M. C. Chang, P. Chang, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, J. Dalseno, M. Danilov, M. Danilov, Z. Doležal, Z. Drásal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, E. Kato, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, S. Korpar, P. Križan, P. Križan, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, J. Libby, Z. Q. Liu, D. Liventsev, P. Lukin, H. Miyata, R. Mizuk, R. Mizuk, G. B. Mohanty

    Journal of High Energy Physics   2013 ( 9 )   2013年1月

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    We present measurements of absolute branching fractions of hadronic and leptonic Ds+decays to K-K+π+, K̄0K+, ηπ+, μ+νμ and τ+ντ and report a search for the leptonic Ds+→ e+νedecays. The results are obtained from a data sample of 913 fb-1collected at or near the Y(4S ) and Y(5S ) resonances with the Belle detector at the KEKB asymmetric-energy e+e-collider. The branching fractions of hadronic decays are measured to be B(Ds+→ K-K+π+) = (5.06 ± 0.15 ± 0.21)%; B(Ds+→ K̄0K+) = (2.95 ± 0.11 ± 0.09)%; B(Ds+→ ηπ+) = (1.82 ± 0.14 ± 0.07)%; where the first and second uncertainties are statistical and systematic, respectively. The branching fractions of leptonic decays are measured to be B(Ds+→ μ+νμ) = (0.531 ± 0.028 ± 0.020)%; B(Ds+→ τ+ντ) = (5.70 ± 0.21-0.30+0.31)%, which are combined to determine the Ds+meson decay constant fDs= (255.5 ± 4.2 ± 5.1) MeV: We find no significant signal for Ds+→ e+νedecays and set an upper limit of B(Ds+→ e+νe) &lt; 1.0(0.83) × 10-4at 95% (90%) confidence level.

    DOI: 10.1007/JHEP09(2013)139

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  • Search for double charmonium decays of the P-wave spin-triplet bottomonium states

    C. P. Shen, C. Z. Yuan, T. Iijima, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, T. Aushev, A. M. Bakich, B. Bhuyan, M. Bischofberger, A. Bozek, M. Bračko, T. E. Browder, M. C. Chang, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. S. Cho, K. Cho, S. K. Choi, Y. Choi, J. Dalseno, Z. Drásal, A. Drutskoy, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, A. Ishikawa, R. Itoh, M. Iwabuchi, T. Iwashita, T. Julius, J. H. Kang, T. Kawasaki, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, S. Koblitz, P. Kody, S. Korpar, P. Krian, P. Krokovny, T. Kumita, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, J. Libby, C. L. Lim, C. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, G. Pakhlova, C. W. Park, H. K. Park, T. K. Pedlar, M. Petrič, L. E. Piilonen, A. Poluektov, M. Ritter, M. Röhrken

    Physical Review D - Particles, Fields, Gravitation and Cosmology   85 ( 7 )   2012年4月

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    Using a sample of 158×106 Υ(2S) events collected with the Belle detector, we search for the first time for double-charmonium decays of the P-wave spin-triplet bottomonium states (Υ(2S) →γχ bJ, χ bJ→J/ψJ/ψ, J/ψψ ′, ψ ′ψ ′ for J=0, 1, and 2). No significant χ bJ signal is observed in the double-charmonium mass spectra, and we obtain the following upper limits: B(χ bJ→J/ψJ/ψ)<7.1×10 -5, 2.7×10 -5, 4.5×10 -5, B(χ bJ→ J/ψψ ′)<1.2×10 -4, 1.7×10 -5, 4.9×10 -5, B(χ bJ→ψ ′ψ ′)<3. 1×10 -5, 6.2×10 -5, 1.6×10 -5 for J=0, 1, and 2, respectively, at the 90% confidence level. These limits are significantly lower than the central values (with uncertainties of 50% to 70%) predicted using the light cone formalism but are consistent with calculations using the nonrelativistic QCD (NRQCD) factorization approach. © 2012 American Physical Society.

    DOI: 10.1103/PhysRevD.85.071102

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  • Physics achievements from the Belle experiment

    Jolanta Brodzicka, Thomas Browder, Paoti Chang, Simon Eidelman, Bostjan Golob, Kiyoshi Hayasaka, Hisaki Hayashii, Toru Iijima, Kenji Inami, Kay Kinoshita, Youngjoon Kwon, Kenkichi Miyabayashi, Gagan Mohanty, Mikihiko Nakao, Hideyuki Nakazawa, Stephen Olsen, Yoshihide Sakai, Christoph Schwanda, Alan Schwartz, Karim Trabelsi, Sadaharu Uehara, Shoji Uno, Yasushi Watanabe, Anze Zupanc

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   ( 1 )   2012年

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    記述言語:英語   掲載種別:機関テクニカルレポート,技術報告書,プレプリント等   出版者・発行元:OXFORD UNIV PRESS INC  

    The Belle experiment, running at the KEKB e(+)e(-) asymmetric energy collider during the first decade of the century, achieved its original objective of precisely measuring differences between particles and antiparticles in the B system. After collecting 1000 fb(-1) of data at various Upsilon resonances, Belle also obtained the many other physics results described in this article.

    DOI: 10.1093/ptep/pts072

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  • Observation of an enhancement in e<sup>+</sup>e<sup>-</sup>→Υ(1S) πn<sup>+</sup>n<sup>-</sup>→Υ(2S)n<sup>+</sup>n<sup>-</sup> and (3S)n<sup>+</sup>n<sup>-</sup> production near s = 10.89 GeV

    K. F. Chen, W. S. Hou, I. Adachi, H. Aihara, T. Aushev, A. M. Bakich, V. Balagura, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M. C. Chang, P. Chang, Y. Chao, A. Chen, P. Chen, B. G. Cheon, C. C. Chiang, R. Chistov, I. S. Cho, Y. Choi, J. Dalseno, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, P. Goldenzweig, H. Ha, B. Y. Han, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, N. Katayama, C. Kiesling, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Kriaan, P. Krokovny, Y. J. Kwon, S. H. Kyeong, J. S. Lange, S. H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, J. MacNaughton, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, G. Pakhlova, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. Shapkin

    Physical Review D - Particles, Fields, Gravitation and Cosmology   82 ( 9 )   2010年11月

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    We measure the production cross sections for e+e -→Υ(1S)π+π-, Υ(2S)π+π-, and Υ(3S) π+π- as a function of √s between 10.83 GeV and 11.02 GeV. The data consist of 8.1fb-1 collected with the Belle detector at the KEKB e+e- collider. We observe enhanced production in all three final states that does not agree well with the conventional Υ(10860) line shape. A fit using a Breit-Wigner resonance shape yields a peak mass of [10888.4-2.6+2.7(stat)±1.2(syst)]MeV/c2 and a width of [30.7-7.0+8.3(stat)±3.1(syst)]MeV/c2. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevD.82.091106

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  • Search for CP-violating charge asymmetry in B <sup>±</sup> →J/ ψK <sup>±</sup> decays

    K. Sakai, T. Kawasaki, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M. C. Chang, Y. Chao, A. Chen, K. F. Chen, P. Chen, B. G. Cheon, C. C. Chiang, K. Cho, Y. Choi, J. Dalseno, Z. Doležal, Z. Drásal, W. Dungel, S. Eidelman, M. Feindt, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, J. H. Kang, H. Kawai, H. Kichimi, C. Kiesling, H. J. Kim, J. H. Kim, Y. J. Kim, B. R. Ko, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, J. Li, A. Limosani, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, D. Mohapatra, E. Nakano, M. Nakao, Z. Natkaniec, S. Neubauer, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Prim, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo

    Physical Review D - Particles, Fields, Gravitation and Cosmology   82 ( 9 )   2010年11月

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    We present the result of a search for charge asymmetry in B ± →J/ψK ± decays using 772×106 BB̄ pairs collected at the Υ(4S) resonance by the Belle detector at the KEKB asymmetric-energy e + e - collider. The CP-violating charge asymmetry is measured to be A CP (B + →J/ ψK + )=[-0.76±0.50(stat)±0.22(syst)]%. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevD.82.091104

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  • Search for B0→K<sup>*</sup>0K<sup>̄</sup><sup>*</sup>0, B0→K<sup>*</sup>0K<sup>*</sup>0 and B0→K<sup>+</sup>π<sup>-</sup>K<sup>∑</sup>π<sup>±</sup> decays

    C. C. Chiang, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, Y. Chao, A. Chen, P. Chen, B. G. Cheon, I. S. Cho, Y. Choi, J. Dalseno, A. Das, Z. Doležal, A. Drutskoy, S. Eidelman, M. Feindt, N. Gabyshev, P. Goldenzweig, H. Ha, T. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, Y. B. Hsiung, T. Iijima, K. Inami, R. Itoh, M. Iwasaki, N. J. Joshi, J. H. Kang, P. Kapusta, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, K. Kinoshita, B. R. Ko, S. Korpar, M. Kreps, P. Križan, P. Krokovny, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. H. Lee, J. Li, A. Limosani, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, E. Nakano, M. Nakao, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, S. Okuno, S. L. Olsen, W. Ostrowicz, G. Pakhlova, C. W. Park, H. Park, H. K. Park, K. S. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, J. G. Shiu, R. Sinha

    Physical Review D - Particles, Fields, Gravitation and Cosmology   81 ( 7 )   2010年4月

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    記述言語:英語  

    We report a search for the decays B0→K*0K ̄*0 and B0→K*0K *0. We also measure other charmless decay modes with K +π-K-π+ and K +π-K+π- final states. The results are obtained from a data sample containing 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e +e- collider. We set upper limits on the branching fractions for B0→K*0K̄*0 and B0→K*0K*0 of 0.81×10 -6 and 0.20×10-6, respectively, at the 90% confidence level. © 2010 The American Physical Society.

    DOI: 10.1103/PhysRevD.81.071101

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  • Measurements of charmless hadronic b→s penguin decays in the π+π-K+π- final state and first observation of B0→ρ0K+π-

    S. H. Kyeong, Y. J. Kwon, I. Adachi, H. Aihara, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, M. Bischofberger, A. Bozek, M. Bračko, T. E. Browder, M. C. Chang, Y. Chao, A. Chen, B. G. Cheon, C. C. Chiang, I. S. Cho, Y. Choi, J. Dalseno, A. Das, A. Drutskoy, W. Dungel, S. Eidelman, N. Gabyshev, P. Goldenzweig, H. Ha, J. Haba, B. Y. Han, T. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, Y. Hoshi, H. J. Hyun, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Križan, R. Kumar, M. J. Lee, T. Lesiak, J. Li, C. Liu, Y. Liu, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, J. B. Singh

    Physical Review D - Particles, Fields, Gravitation and Cosmology   80 ( 5 )   2009年9月

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    記述言語:英語  

    We report measurements of charmless hadronic B0 decays into the π+π-K+π- final state. The analysis uses a sample of 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at the resonance. The decay B0→ρ0K+π- is observed for the first time; the significance is 5.0σ and the corresponding partial branching fraction for MKπ(0.75,1.20)GeV/c2 is [2.8±0.5(stat) ±0.5(syst)]×10-6. We also obtain the first evidence for B0→f0(980)K+π- with 3.5σ significance and for B0→π+π- K*0 with 4.5σ significance. For the two-body decays B0→ρ0K*0 and B0→f0(980)K*0, the significances are 2.7σ and 2.5σ, respectively, and the upper limits on the branching fractions are 3.4×10-6 and 2.2×10-6 at 90% confidence level. © 2009 The American Physical Society.

    DOI: 10.1103/PhysRevD.80.051103

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  • High-statistics study of ηπ0 production in two-photon collisions

    S. Uehara, Y. Watanabe, H. Nakazawa, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, A. M. Bakich, K. Belous, A. Bondar, M. Bračko, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, R. Chistov, Y. Choi, J. Crnkovic, J. Dalseno, M. Dash, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, P. Goldenzweig, H. Ha, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, H. Kichimi, C. Kiesling, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, P. Krokovny, R. Kumar, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, S. H. Lee, J. Li, A. Limosani, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Palka, C. W. Park, H. Park, H. K. Park, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanič, M. Starič, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, Y. Unno, S. Uno, P. Urquijo

    Physical Review D - Particles, Fields, Gravitation and Cosmology   80 ( 3 )   2009年8月

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    The differential cross section for the process γγ→η π0 has been measured in the kinematic range 0.84GeV&lt;W&lt;4.0GeV, θ*|&lt;0.8, where W and θ* are the energy and π0 (or η) scattering angle, respectively, in the γγ center-of-mass system. The results are based on a 223fb-1 data sample collected with the Belle detector at the KEKB e+e- collider. Clear peaks due to the a0(980) and a2(1320) are visible. The differential cross sections are fitted in the energy region 0.9GeV&lt;W&lt;1.46GeV to obtain the parameters of the a0(980). Its mass, width and ΓγγB(ηπ0) are measured to be 982.3-0.7-4.7+0.6+3. 1MeV/c2, 75.6±1.6-10.0+17.4MeV and 128-2-43+3+502eV, respectively. The energy and angular dependences above 3.1 GeV are compared with those measured in the π0π0 channel. The integrated cross section over θ*|&lt;0. 8 has a W-n dependence with n=10.5±1.2±0.5, which is slightly larger than that for π0π0. The differential cross sections show a sin-4θ* dependence similar to γγ→π0π0. The measured cross section ratio, σ(ηπ0)/σ(π0π0)=0. 48±0.05±0.04, is consistent with a QCD-based prediction. © 2009 The American Physical Society.

    DOI: 10.1103/PhysRevD.80.032001

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  • Observation of the Φ (1680) and the Y(2175) in e+e-→Φ π+π

    C. P. Shen, C. Z. Yuan, P. Wang, X. L. Wang, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, A. M. Bakich, E. Barberio, K. Belous, M. Bischofberger, A. Bondar, M. Bračko, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, R. Chistov, I. S. Cho, S. K. Choi, Y. Choi, J. Crnkovic, J. Dalseno, M. Danilov, M. Dash, W. Dungel, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, P. Goldenzweig, H. Ha, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, S. Korpar, M. Kreps, P. Križan, P. Krokovny, W. Kuehn, R. Kumar, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. H. Lee, T. Lesiak, J. Li, A. Limosani, C. Liu, D. Liventsev, R. Louvot, F. Mandl, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, L. E. Piilonen, A. Poluektov, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider

    Physical Review D - Particles, Fields, Gravitation and Cosmology   80 ( 3 )   2009年8月

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    The cross sections for e+e-→Φ π+π- and e+e-→Φ f0(980) are measured from threshold to s=3.0GeV using initial-state radiation. The analysis is based on a data sample of 673fb-1 collected on and below the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. First measurements are reported for the resonance parameters of the Φ (1680) in the Φ π+π- mode: m=(1689±7±10)MeV/c2 and Γ=(211±14±19)MeV/c2. A structure at s=2.1GeV/c2, corresponding to the so called Y(2175), is observed; its mass and width are determined to be (2079±13-28+79)MeV/c2 and (192±23-61+25)MeV/c2, respectively. © 2009 The American Physical Society.

    DOI: 10.1103/PhysRevD.80.031101

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  • Time-dependent Dalitz plot measurement of CP parameters in B0→KS0π+π- decays

    J. Dalseno, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, V. Balagura, A. Bay, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, I. S. Cho, Y. Choi, M. Dash, A. Drutskoy, S. Eidelman, M. Fujikawa, N. Gabyshev, P. Goldenzweig, B. Golob, H. Ha, B. Y. Han, K. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Krian, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lee, S. E. Lee, J. Li, S. W. Lin, C. Liu, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, Y. Nakahama, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, M. Rozanska, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, J. G. Shiu

    Physical Review D - Particles, Fields, Gravitation and Cosmology   79 ( 7 )   2009年4月

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    We present a time-dependent Dalitz plot measurement of CP violation parameters in B0→KS0π+π- decays. These results are obtained from a large data sample that contains 657×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. For the CP violation parameters, we obtain two consistent solutions that describe the data well. The first of these solutions may be preferred by external information from other measurements. There is no evidence for direct CP violation in B0→ρ0(770)KS0, B0→f0(980)KS0 and B0→K*+(892)π-, while measurements of mixing-induced CP violation in B0→ρ0(770)KS0 and B0→f0(980)KS0 decays are consistent with that of b→cc̄s decays. We also measured the phase difference between B0→K*+(892)π- and B̄0→K*-(892)π+, which may be used to extract 3. © 2009 The American Physical Society.

    DOI: 10.1103/PhysRevD.79.072004

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  • Precise measurement of B(tau(-) -&gt; K*(0)(892)K(-)nu(tau)), MK*0(892) and Gamma(K*0(892)) from Belle

    Y. Usuki, K. Hayasaka, K. Inami, Y. Miyazaki, T. Ohshima

    NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS   189   181 - 186   2009年4月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    Making full use of a high-statistical data sample of tau decays recorded in the KEKB-Belle experiment, we have largely improved the precision of the branching fraction B(tau(-) -&gt; K*(0)(892)K(-)nu(tau)) = (1.56 +/- 0.02 +/- 0.09) x 10(-3), and measured the mass and width of K*(0)(892) meson to be (895.10 +/- 0.27 +/- 0.31) MeV/c(2) and (47.23 +/- 0.49 +/- 0.79) MeV, respectively, with better or similar accuracy of the PDG world average values. The first measurement of tau(-) K*(0)(892)K(-)pi(0)nu(tau) decay is also accomplished and beta(tau(-) -&gt; K*(0)(892)K(-)pi(0)nu(tau)) = (2.39 +/- 0.46 +/- 0.26) x 10(-5) is obtained. (All results presented here are preliminary.)

    DOI: 10.1016/j.nuclphysbps.2009.03.032

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  • Belle&apos;s precise measurement of tau-decay with eta &apos; s

    Y. Usuki, K. Inami, K. Hayasaka, Y. Miyazaki, T. Ohshima

    NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS   189   103 - 110   2009年4月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    We have measured branching fractions of hadronic tau-decays involving eta meson, using 490 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider: B(tau(-) -&gt; K(-) eta nu(tau)) = (1.58 +/- 0.05 +/- 0.09) x 10(-4), B(tau(-) -&gt; K(-) pi(0) eta nu(tau)) = (4.6 +/- 1.1 +/- 0.4) x 10(-5), B(tau(-) -&gt; pi(-) pi(0) eta nu(tau)) = (1.35 +/- 0.03 +/- 0.07) x 10(-3), B(tau(-) -&gt;pi(-) K(s)(0)eta nu(tau)) = (4.4 +/- 0.7 +/- 0.2) x 10(-5), and B(tau(-) -&gt; K*(-)eta nu(tau)) = (1.34 +/- 0.12 +/- 0.09) x 10(-4). Thoese results are compared with theoretical calculations based on the CVC hypothesis or the VDM model.

    DOI: 10.1016/j.nuclphysbps.2009.03.019

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  • Observation of B0→ΛΛ̄K0 and B0→Λ Λ̄K*0 at Belle

    Y. W. Chang, M. Z. Wang, I. Adachi, H. Aihara, T. Aushev, A. M. Bakich, V. Balagura, A. Bay, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, A. Chen, R. Chistov, Y. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, P. Goldenzweig, H. Ha, B. Y. Han, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, S. Korpar, P. Križan, Y. J. Kwon, S. H. Kyeong, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. W. Lin, C. Liu, Y. Liu, R. Louvot, F. Mandl, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, M. Rozanska, H. Sahoo, Y. Sakai, O. Schneider, A. Sekiya, K. Senyo, M. Shapkin, J. G. Shiu, B. Shwartz, J. B. Singh, S. Stanič, M. Starič, K. Sumisawa, M. Tanaka, G. N. Taylor

    Physical Review D - Particles, Fields, Gravitation and Cosmology   79 ( 5 )   2009年3月

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    We study the charmless decays B→ΛΛ̄h, where h stands for π+, K+, K0,K*+, or K*0, using a 605fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. We observe B0→ΛΛ̄K0 and B0→ΛΛ̄K*0 with branching fractions of (4.76-0.68+0.84(stat)±0.61(syst))×10-6 and (2.46-0.72+0. 87±0.34)×10-6, respectively. The significances of these signals in the threshold-mass enhanced mass region, MΛΛ̄&lt;2.85GeV/c2, are 12.4σ and 9.3σ, respectively. We also update the branching fraction B(B+→ΛΛ̄K+)=(3.38-0.36+0.41±0.41) ×10-6 with better accuracy, and report the following measurement or 90% confidence level upper limit in the threshold-mass-enhanced region: B(B+→ΛΛ̄K*+)=(2.19-0.88+1.13±0.33) ×10-6 with 3.7σ significance; B(B+→ΛΛ̄π+) &lt;0.94×10-6. A related search for B0→ΛΛ̄D̄0 yields a branching fraction B(B0→ΛΛ̄D̄0)=(1.05-0. 44+0.57±0.14)×10-5. This may be compared with the large, ∼10-4, branching fraction observed for B0→pp̄D̄0. The MΛΛ̄ enhancements near threshold and related angular distributions for the observed modes are also reported. © 2009 The American Physical Society.

    DOI: 10.1103/PhysRevD.79.052006

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  • Observation of two resonancelike structures: Observation of two resonancelike structures in the Ic1 mass distribution in exclusive BA0K-I+Ic1

    R. Mizuk, R. Chistov, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, V. Bhardwaj, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M. C. Chang, P. Chang, A. Chen, K. F. Chen, B. G. Cheon, C. C. Chiang, I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Danilov, A. Drutskoy, S. Eidelman, D. Epifanov, P. Goldenzweig, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. KriŽan, P. Krokovny, R. Kumar, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, J. S. Lee, M. J. Lee, S. W. Lin, C. Liu, Y. Liu, D. Liventsev, F. Mandl, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, J. G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    Physical Review D - Particles, Fields, Gravitation and Cosmology   78 ( 7 )   2008年10月

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    記述言語:英語   出版者・発行元:American Physical Society  

    We report the first observation of two resonancelike structures in the π+χc1 invariant mass distribution near 4.1GeV/c2 in exclusive B¯0→K-π+χc1 decays. From a Dalitz plot analysis in which the π+χc1 mass structures are represented by Breit-Wigner resonance amplitudes, we determine masses and widths of: M1=(4051±14-41+20)MeV/c2, Γ1=(82-17-22+21+47)MeV, M2=(4248-29-35+44+180)MeV/c2, and Γ2=(177-39-61+54+316)MeV
    and product branching fractions of B(B¯0→K-Z1,2+)×B(Z1,2+→π+χc1)=(3.0-0.8-1.6+1.5+3.7)×10-5 and (4.0-0.9-0.5+2.3+19.7)×10-5, respectively. Here the first uncertainty is statistical, the second is systematic. The significance of each of the π+χc1 structures exceeds 5σ, including the systematic uncertainty from various fit models. This analysis is based on 657×106 BB¯ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.

    DOI: 10.1103/PhysRevD.78.072004

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  • High-statistics study of the tau(-)-&gt;pi(-)pi(0)nu(tau) decay

    M. Fujikawa, H. Hayashii, S. Eidelman, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, I. Bedny, K. Belous, V. Bhardwaj, U. Bitenc, A. Bondar, M. Bracko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, B. G. Cheon, R. Chistov, I. -S. Cho, Y. Choi, J. Dalseno, M. Dash, D. Epifanov, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hara, Y. Hasegawa, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, W. -S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwabuchi, M. Iwasaki, D. H. Kah, H. Kaji, S. U. Kataoka, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, S. Korpar, P. Krizan, P. Krokovny, R. Kumar, A. Kuzmin, Y. -J. Kwon, S. -H. Kyeong, J. S. Lange, M. J. Lee, S. E. Lee, A. Limosani, C. Liu, Y. Liu, D. Liventsev, J. MacNaughton, F. Mandl, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C. W. Park, H. Park, H. K. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, A. J. Schwartz, R. Seidl, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. -G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanic, M. Staric, T. Sumiyoshi, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, Y. Yamashita, M. Yamauchi, C. Z. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

    PHYSICAL REVIEW D   78 ( 7 )   72006   2008年10月

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    記述言語:英語   出版者・発行元:AMER PHYSICAL SOC  

    We report a high-statistics measurement of the branching fraction for tau(-)-&gt;pi(-)pi(0)nu(tau) and the invariant mass spectrum of the produced pi(-)pi(0) system using 72.2 fb(-1) of data recorded with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The branching fraction obtained is (25.24 +/- 0.01 +/- 0.39)%, where the first error is statistical and the second is systematic. The unfolded pi(-)pi(0) mass spectrum is used to determine resonance parameters for the rho(770), rho(')(1450), and rho('')(1700) mesons. We also use this spectrum to estimate the hadronic (2 pi) contribution to the anomalous magnetic moment of the muon (a(mu)(pi pi)). Our result for a(mu)(pi pi) integrated over the mass range root s=2m(pi)-1.8 GeV/c(2) is a(mu)(pi pi)=(523.5 +/- 1.5(exp)+/- 2.6(Br)+/- 2.5(isospin))x10(-10), where the first error is due to the experimental uncertainties, the second is due to the uncertainties in the branching fractions, and the third is due to the uncertainties in the isospin-violating corrections.

    DOI: 10.1103/PhysRevD.78.072006

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  • Observation of the decay B̄0→Ds+Λp̄

    T. Medvedeva, R. Chistov, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M. C. Chang, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y. J. Kwon, G. Leder, M. J. Lee, S. E. Lee, T. Lesiak, S. W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, Y. Nagasaka, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, L. S. Peak

    Physical Review D - Particles, Fields, Gravitation and Cosmology   76 ( 5 )   2007年9月

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    記述言語:英語  

    We report the first observation of the decay B̄0→Ds+Λ p̄ with a statistical significance of 6.6σ. We measure B(B̄0→Ds+Λp̄)=(2.9±0.7±0.5±0.4) ×10-5, where the first error is statistical, the second is systematic, and the third error comes from the uncertainty in B(Ds+→π+). The data used for this analysis was accumulated at the Υ(4S) resonance, using the Belle detector at the KEKB asymmetric-energy e+e- collider. The integrated luminosity of the data sample is 414fb-1, corresponding to 449×106 BB̄ pairs. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.76.051102

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  • Dalitz analysis of three-body charmless B0→K0π+π- decay

    A. Garmash, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, M. Bračko, M. Bračko, T. E. Browder, M. C. Chang, Y. Chao, A. Chen, K. F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, P. Križan, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, S. E. Lee, T. Lesiak, J. Li, S. W. Lin, Y. Liu, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra

    Physical Review D - Particles, Fields, Gravitation and Cosmology   75 ( 1 )   2007年

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    We report results of a Dalitz plot analysis of the three-body charmless B0→K0π+π- decay. The analysis is performed with a data sample that contains 388×106 BB̄ pairs collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. Measurements of branching fractions for the quasi-two-body decays B0→ρ(770)0K0, B0→f0(980)K0, B0→K*(892)+π-, B0→K*(1430)+π-, and upper limits on several other quasi-two-body decay modes are reported. © 2007 The American Physical Society.

    DOI: 10.1103/PhysRevD.75.012006

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  • Observation of B+→Λc+Λc-K+ and B0→Λ c+Λc-K0 Decays

    N. Gabyshev, K. Abe, K. Abe, I. Adachi, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, W. Bartel, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, Y. B. Hsiung, K. Ikado, A. Imoto, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, T. Kawasaki, H. R. Khan, H. Kichimi, S. M. Kim, S. Korpar, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y. J. Kwon, G. Leder, T. Lesiak, S. W. Lin, D. Liventsev, G. Majumder, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, H. Palka, C. W. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya

    Physical Review Letters   97 ( 20 )   2006年11月

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    We report the first measurements of the doubly charmed baryonic B decays B→Λc+Λc-K. The B+→Λc+Λc-K+ decay is observed with a branching fraction of (6.5-0.9+1.0±1.1±3.4) ×10-4 and a statistical significance of 15.4σ. The B0→Λc+Λc-K0 decay is observed with a branching fraction of (7.9-2.3+2.9±1.2±4.1)×10-4 and a statistical significance of 6.6σ. The branching fraction errors are statistical, systematic, and the error resulting from the uncertainty of the Λc+→pK-π+ decay branching fraction. The analysis is based on 357fb-1 of data accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett..97.202003

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  • Observation of a χc2′ candidate in γγ→DD̄ production at belle

    S. Uehara, K. Abe, I. Adachi, H. Aihara, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M. C. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, J. Dragic, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, A. Gorišek, H. C. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, Y. Hoshi, S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, S. M. Kim, S. Korpar, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lange, G. Leder, S. E. Lee, T. Lesiak, J. Li, S. W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, P. Pakhlov, C. W. Park, H. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai

    Physical Review Letters   96 ( 8 )   2006年3月

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    We report on a search for new resonant states in the process γγ→DD̄. A candidate C-even charmonium state is observed in the vicinity of 3.93GeV/c2. The production rate and the angular distribution in the γγ center-of-mass frame suggest that this state is the previously unobserved χc2′, the 2P23 charmonium state. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevLett.96.082003

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  • Charge asymmetry of same-sign dileptons in B0-B̄0 mixing

    E. Nakano, K. Abe, K. Abe, H. Aihara, Y. Asano, T. Aushev, A. M. Bakich, Y. Ban, E. Barberio, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, Y. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, Y. Enari, S. Fratina, T. Gershon, G. Gokhroo, B. Golob, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. O. Kim, S. K. Kim, S. M. Kim, S. Korpar, P. Križan, P. Krokovny, S. Kumar, C. C. Kuo, Y. J. Kwon, J. S. Lange, G. Leder, T. Lesiak, J. Li, S. W. Lin, D. Liventsev, G. Majumder, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, H. Palka, H. Park, N. Parslow, R. Pestotnik, L. E. Piilonen, H. Sagawa

    Physical Review D - Particles, Fields, Gravitation and Cosmology   73 ( 11 )   2006年

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    We report a measurement of the charge asymmetry for same-sign dileptons in B0-B̄0 mixing, Asl. The data were collected with the Belle detector at KEKB. Using a data sample of 78fb-1 recorded at the Υ(4S) resonance and 9fb-1 recorded at an energy 60 MeV below the resonance, we measure Asl=(-1.1±7.9(stat)±8.5(sys))×10-3. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.73.112002

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  • Charm hadrons from fragmentation and B decays in e+e- annihilation at s=10.6GeV

    R. Seuster, K. Abe, H. Aihara, Y. Asano, T. Aushev, A. M. Bakich, M. Barbero, I. Bedny, U. Bitenc, I. Bizjak, A. Bozek, M. Bračko, J. Brodzicka, A. Chen, B. G. Cheon, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, F. Fang, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, K. Hayasaka, M. Hazumi, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, K. Ikado, R. Itoh, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. M. Kim, P. Križan, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lange, T. Lesiak, J. Li, S. W. Lin, F. Mandl, W. Mitaroff, H. Miyake, Y. Miyazaki, R. Mizuk, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, M. E. Sevior, H. Shibuya, V. Sidorov, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, G. Varner, C. C. Wang, C. H. Wang, M. Z. Wang, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich

    Physical Review D - Particles, Fields, Gravitation and Cosmology   73 ( 3 )   2006年

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    We present an analysis of charm quark fragmentation at 10.6 GeV, based on a data sample of 103fb-1 collected by the Belle detector at the KEKB accelerator. We consider fragmentation into the main charmed hadron ground states, namely D0,D+,Ds+ and Λc+, as well as the excited states D*0 and D*+. The fragmentation functions are important to measure as they describe processes at a low energy scale, where calculations in perturbation theory lead to large uncertainties. Fragmentation functions can also be used as input distributions for Monte Carlo generators. Additionally, we determine the average number of these charmed hadrons produced per B decay at the Υ(4S) resonance and measure the distribution of their production angle in e+e- annihilation events and in B decays. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.73.032002

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  • Improved measurements of branching fractions and CP partial rate asymmetries for B→ωK and B→ωπ

    C. M. Jen, P. Chang, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, A. M. Bakich, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, M. Bračko, M. Bračko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, S. K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, S. Hou, W. S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, Y. J. Kim, P. Križan, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, G. Leder, S. E. Lee, Y. J. Lee, T. Lesiak, S. W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima

    Physical Review D - Particles, Fields, Gravitation and Cosmology   74 ( 11 )   2006年

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    We report improved measurements of B to pseudoscalar-vector decays containing an ω meson in the final state. Our results are obtained from a data sample that contains 388×106 BB̄ pairs accumulated at the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure the following branching fractions: B(B+→ωK+)= [8.1±0.6(stat.)±0.6(syst.)]×10-6, B(B+→ωπ+)= [6.9±0.6(stat.)±0.5(syst.)]×10-6, and B(B0→ωK0)= [4.4-0.7+0.8(stat.)±0.4(syst.)]×10-6. The partial width ratio Γ(B+→ωK+)Γ(B0→ωK0)=1.7±0.3(stat.) ±0.1(sys.). We also set the 90% confidence level upper limit B(B0→ωπ0)&lt;2.0×10-6. In addition, we obtain the partial rate asymmetries ACP=0.05-0.07+0.08(stat.)±0.01(syst.) for B+→ωK+, and ACP=-0.02±0.09(stat.)±0.01(syst.) for B+→ωπ+. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.74.111101

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  • Search for the hc meson in B±→hcK±

    F. Fang, T. E. Browder, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, A. M. Bakich, V. Balagura, M. Barbero, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bozek, M. Bračko, M. Bračko, M. Bračko, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, H. Ha, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, S. Hou, W. S. Hou, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, A. Kibayashi, H. Kichimi, H. J. Kim, K. Kinoshita, P. Križan, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. Lee, T. Lesiak, S. W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, Y. Onuki, H. Ozaki, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. Schietinger, O. Schneider, R. Seidl, R. Seidl, K. Senyo

    Physical Review D - Particles, Fields, Gravitation and Cosmology   74 ( 1 )   2006年

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    We report a search for the hc meson via the decay chain B±→hcK±, hc→ηcγ with ηc→KS0K± π and pp̄. No significant signals are observed. We obtain upper limits on the branching fractions for B±→ηcγK± in bins of the ηcγ invariant mass. The results are based on an analysis of 253fb-1 of data collected by the Belle detector at the KEKB e+e- collider. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.74.012007

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  • Observation of B±→χc1π± and search for direct CP violation

    R. Kumar, J. B. Singh, K. Abe, K. Abe, H. Aihara, D. Anipko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, S. Blyth, A. Bozek, M. Bračko, M. Bračko, M. Bračko, T. E. Browder, M. C. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, B. Golob, A. Gorišek, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, R. Itoh, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, K. Kinoshita, P. Krokovny, C. C. Kuo, Y. J. Kwon, G. Leder, S. W. Lin, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, J. Mueller, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. Schietinger

    Physical Review D - Particles, Fields, Gravitation and Cosmology   74 ( 5 )   2006年

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    We report the first observation of B±→χc1π±, a Cabibbo- and color-suppressed decay in a data sample of 386×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe 55±10 signal events with a statistical significance of 6.3σ including systematic uncertainties. The measured branching fraction and charge-asymmetry is B(B±→χc1π ±)=(2.2±0.4±0.3)×10-5 and Aπ=0.07±0. 18±0.02, respectively. We also determine the ratio B(B±→χ c1π±)/B(B±→χc1K±)=(4.3±0.8±0.3)%. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.74.051103

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  • Measurement of CP violation in B0→D*-π+ and B0→D-π+ decays

    F. J. Ronga, T. R. Sarangi, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, M. Bračko, M. Bračko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, B. Golob, A. Gorišek, J. Haba, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, K. Kinoshita, S. Korpar, S. Korpar, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y. J. Kwon, G. Leder, J. Lee, T. Lesiak, J. Li, A. Limosani, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, T. Nagamine, I. Nakamura, E. Nakano, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima

    Physical Review D - Particles, Fields, Gravitation and Cosmology   73 ( 9 )   2006年

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    We report measurements of time-dependent decay rates for B0→D(*)-π+ decays and extraction of CP violation parameters that depend on 3. Using fully reconstructed D(*)π events and partially reconstructed D*π events from a data sample that contains 386×106 BB̄ pairs that was collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric energy e+e- collider, we obtain the CP violation parameters S+(D(*)π) and S-(D(*)π). We obtain S+(D*π)=0.049±0.020(stat)±0.011(sys), S-(D*π)=0.031±0.019(stat)±0.011(sys), and S+(Dπ)=0.031±0.030(stat)±0.012(sys), S-(Dπ)=0.068±0. 029(stat)±0.012(sys). These results are an indication of CP violation in B0→D*-π+ and B0→D-π+ decays at the 2.5σ and 2.2σ levels, respectively. If we use the values of RD(*)π that are derived using assumptions of factorization and SU(3) symmetry, branching fraction measurements for the B→Ds(*)π modes, and lattice QCD calculations, we can restrict the allowed region of |sin (2 1+ 3)| to be above 0.44 and 0.52 at 68% confidence level from the D*π and Dπ modes, respectively. © 2006 The American Physical Society.

    DOI: 10.1103/PhysRevD.73.092003

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  • Search for the b→dγ process

    D. Mohapatra, M. Nakao, B. D. Yabsley, K. Abe, K. Abe, H. Aihara, K. Arinstein, Y. Asano, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, E. Barberio, M. Barbero, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, J. Dragic, S. Eidelman, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, T. Hara, K. Hayasaka, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, S. M. Kim, K. Kinoshita, P. Križan, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y. J. Kwon, G. Leder, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S. W. Lin, D. Liventsev, G. Majumder, F. Mandl, A. Matyja, Y. Mikami, W. Mitaroff, H. Miyata, G. R. Moloney, T. Nagamine, Y. Nagasaka, E. Nakano, H. Nakazawa, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Park, R. Pestotnik

    Physical Review D - Particles, Fields, Gravitation and Cosmology   72 ( 1 )   1 - 5   2005年7月

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    We report the results of a search for the flavor-changing neutral current process b→dγ using a sample of 275×106 B meson pairs accumulated by the Belle detector at KEKB. We find no significant signal for the exclusive decays B-→ρ-γ, B̄0→ρ0γ, or B̄0→ωγ. Assuming an isospin relation between the three modes, we set an upper limit for the combined branching fraction B(B→(ρ,ω)γ), of 1.4×10-6 at the 90% confidence level. This limit can be used to constrain the ratio of CKM matrix elements |Vtd/Vts|. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevD.72.011101

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  • Measurements of branching fractions and CP asymmetries in B→ηh decays

    P. Chang, K. Abe, K. Abe, H. Aihara, M. Akatsu, Y. Asano, T. Aushev, A. M. Bakich, V. Balagura, Y. Ban, S. Banerjee, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, K. F. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, R. Guo, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, Y. B. Hsiung, H. C. Huang, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, S. M. Kim, P. Koppenburg, S. Korpar, P. Krian, P. Krokovny, R. Kulasiri, C. C. Kuo, Y. J. Kwon, S. E. Lee, S. H. Lee, T. Lesiak, J. Li, S. W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, S. Ogawa

    Physical Review D - Particles, Fields, Gravitation and Cosmology   71 ( 9 )   1 - 6   2005年5月

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    We report measurements of B to pseudoscalar-pseudoscalar decays with at least one η meson in the final state using 140fb-1 of data collected by the Belle detector at KEKB e+e- collider. We observe the decay B+→ηπ+ and find evidence of B+→ηK+; the measured branching fractions are B(B+→ηπ+)=(4.8-0.7+0.8(stat)±0.3(sys))×10-6 and B(B+→ηK+)=(2.1±0.6(stat)±0.2(sys))×10-6. Their corresponding CP violating asymmetries are measured to be 0.07±0.15(stat) ±0.03(sys) for ηπ± and -0.49±0.31(stat)±0. 07(sys) for ηK±. No significant signals are found for neutral B→ηh decays. We report the following upper limits on branching fractions at the 90% confidence level: B(B0→ηK0)&lt;2.0×10-6, B(B0→ηπ0)&lt;2.5×10-6 and B(B0→ηη)&lt;2. 0×10-6. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevD.71.091106

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  • Search for B0→J/ψD̄0 and B+→J/ψD̄0π+ decays

    L. M. Zhang, Z. P. Zhang, K. Abe, K. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aushev, S. Bahinipati, A. M. Bakich, M. Barbero, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, K. F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Goriek, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kulasiri, S. Kumar, C. C. Kuo, Y. J. Kwon, G. Leder, T. Lesiak, J. Li, S. W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe

    Physical Review D - Particles, Fields, Gravitation and Cosmology   71 ( 9 )   1 - 6   2005年5月

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    We report the results of a search for the decay modes B0→J/ ψD̄0 and B+→J/ψD̄0π+. The analysis is based on 140fb-1 of data accumulated by the Belle detector at the KEKB asymmetric-energy e+e- collider. No significant signals are observed and we determine the branching fraction upper limits B(B0→J/ψD̄0)&lt;2.0×10-5 and B(B+→J/ψD̄0π+)&lt;2.5×10-5 at 90% confidence level. These results rule out the explanation of the excess in the low momentum region of the inclusive J/ψ spectrum as intrinsic charm content in the B meson. The branching fractions of the corresponding nonresonant decay channels are also reported. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevD.71.091107

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  • Search for τ → eγ decay at Belle

    K. Hayasaka, K. Abe, K. Abe, H. Aihara, Y. Asano, T. Aushev, S. Bahinipati, A. M. Bakich, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M. C. Chang, P. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, J. Dalseno, M. Dash, S. Eidelman, Y. Enari, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, J. Haba, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, S. M. Kim, P. Krokovny, C. C. Kuo, A. Kuzmin, Y. J. Kwon, G. Leder, S. E. Lee, S. H. Lee, T. Lesiak, J. Li, S. W. Lin, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, P. Pakhlov, H. Palka, C. W. Park, N. Parslow, R. Pestotnik, L. E. Piilonen, N. Root, H. Sagawa

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   613 ( 1-2 )   20 - 28   2005年4月

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    We have searched for the lepton-flavor-violating decay τ→eγ using a data sample of 86.7 fb-1 collected with the Belle detector at the KEKB asymmetric e+e- collider. No evidence for a signal is obtained, and we set an upper limit for the branching fraction B(τ→eγ)&lt;3.9×10-7 at the 90% C.L. © 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2005.03.028

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  • Improved measurements of the partial rate asymmetry in B → hh decays

    Y. Chào, P. Chang, K. Abe, K. Abe, H. Aihara, Y. Asano, T. Aushev, S. Bahinipati, A. M. Bakich, Y. Ban, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, M. Bračko, J. Brodzicka, T. E. Browder, K. F. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, S. Cole, M. Danilov, M. Dash, L. Y. Dong, S. Eidelman, V. Eiges, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, R. Guo, J. Haba, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W. S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. Kakuno, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, J. H. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Krokovny, Y. J. Kwon, G. Leder, Y. J. Lee, T. Lesiak, J. Li, S. W. Lin, J. MacNaughton, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Palka, C. W. Park, H. Park, N. Parslow

    Physical Review D - Particles, Fields, Gravitation and Cosmology   71 ( 3 )   1 - 31502   2005年2月

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    We report improved measurements of the partial rate asymmetry (A CP) in B → hh decays with 140 fb -1 of data collected with the Belle detector at the KEKB e +e - collider. Here h stands for a charged or neutral pion or kaon and in total five decay modes are included: K ±π ±, K s0π ±, K ±π 0, π ±π 0, and K s0π 0. The flavor of the last decay mode is determined from the accompanying B meson. Using a data sample 4.7 times larger than that of our previous measurement, we find A CP(K ±π ±) - 0.088 ± 0.035 ± 0.013, 2.4σ from zero. Results for other decay modes are also presented. © 2005 The American Physical Society.

    DOI: 10.1103/PhysRevD.71.031502

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  • Measurement of masses and branching ratios of Ξ<inf>c</inf><sup>+</sup> and Ξ<inf>c</inf><sup>0</sup> baryons

    T. Lesiak, K. Abe, K. Abe, I. Adachi, H. Aihara, Y. Asano, S. Bahinipati, A. M. Bakich, A. Bay, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, V. Eiges, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, J. Haba, K. Hayasaka, M. Hazumi, L. Hinz, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, K. Kinoshita, S. Korpar, P. Krokovny, S. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lange, G. Leder, S. W. Lin, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyata, G. R. Moloney, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Park, K. S. Park, N. Parslow, L. S. Peak, L. E. Piilonen, M. Rozanska, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, S. Semenov, H. Shibuya

    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics   605 ( 3-4 )   237 - 246   2005年1月

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    We report a measurement of the Ξc+ and Ξc0 baryon masses, and the branching ratios for various Ξc decays, using 140 fb-1 of data collected by the Belle experiment at the KEKB e+e- collider. The mass splitting mΞc0 - mΞc+ is found to be 2.9 ± 0.5 MeV/c2; this measurement is three times as precise as the current world average. We measure the branching ratios Γ(Ξc+ → ΛK-π+π+)/ Γ(Ξc+ → Ξ -π+π+) = 0.32 ± 0.03 ± 0.02 and Γ(Ξc0 → pK-k -π+)/Γ(Ξc0 → Ξ-π+) = 0.33 ± 0.03 ± 0.03, with improved precision, and measure Γ(Ξc+ → p KS0KS0) /Γ(Ξc+ → Ξ -π+π+) = 0.087 ± 0.016 ± 0.014, Γ(Ξc0 ΛK -π+)/Γ(Ξc0 → Ξ-π+) = 1.07 ± 0.12 ± 0.07 and Γ(Ξc0 → ΛKS0)/Γ(Ξc0 → Ξ -π+) = 0.21 ± 0.02 ± 0.02 for the first time. © 2004 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.physletb.2004.11.038

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  • Observation of B<sup>0</sup> → D*<sup>-</sup>(5π) <sup>+</sup>, B<sup>+</sup> → D*<sup>-</sup>(4π)<sup>++</sup> and B<sup>+</sup> → D̄*<sup>0</sup> (5π)<sup>+</sup>

    G. Majumder, K. Abe, K. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aziz, S. Bahinipati, A. M. Bakich, W. Bartel, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, A. Bozek, J. Brodzicka, T. E. Browder, Y. Chao, W. T. Chen, B. G. Cheon, R. Chistov, S. K. Choi, A. Chuvikov, S. Cole, M. Danilov, M. Dash, S. Eidelman, V. Eiges, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, J. Haba, K. Hayasaka, M. Hazumi, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, T. Kawasaki, H. R. Khan, H. J. Kim, K. Kinoshita, P. Križan, P. Krokovny, S. Kumar, C. C. Kuo, Y. J. Kwon, J. S. Lange, G. Leder, T. Lesiak, S. W. Lin, J. MacNaughton, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, D. Mohapatra, Y. Nagasaka, T. Nakadaira, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Park, K. S. Park, N. Parslow, L. E. Piilonen, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, J. Schümann, S. Semenov, K. Senyo, H. Shibuya, J. B. Singh, A. Somov, N. Soni, S. Stanic

    Physical Review D - Particles, Fields, Gravitation and Cosmology   70 ( 11 )   1 - 111103   2004年12月

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    We report the first observation of a number of decay modes of the B meson, namely B0 → D*- (5π)+, B + → D*-(4π)++, and B+ → D̄*0(5π)+, where (nπ) implies the combination of n charged pions. The analysis is based on a 140 fb-1 data sample collected at the Y(4S) resonance with the Belle detector at KEKB: We measure B[B0 → D*-(5π)+] = (4.72 ± 0.59 ± 0.71) × 10-3, B[B+ → D*-(4μ)++] = (2.56 ± 0.26 ± 0.33) × 10-3, and B[B+ → D̄* 0(5π)+] = (5.67 ± 0.91 ± 0.85) × 10-3. We also provide improved measurements of the branching fractions for the decay modes B0 → D*-(3π) +, B+ → D̄*0°(3π) +, and B0 → D̄*0(4π) 0.

    DOI: 10.1103/PhysRevD.70.111103

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  • Observation of B <sup>+</sup> ∧ ∧K <sup>+</sup>

    Y. J. Lee, M. Z. Wang, K. Abe, K. Abe, T. Abe, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, Y. Ban, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, A. Chuvikov, M. Danilov, M. Dash, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, R. Guo, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W. S. Hou, Y. B. Hsiung, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, P. Koppenburg, S. Korpar, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Lee, T. Lesiak, J. Li, S. W. Lin, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyata, R. Mizuk, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki

    Physical Review Letters   93 ( 21 )   2004年11月

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    The observation of the hyperonic B + → λλ̄K + decay was presented. It was found that the rate of a charmless B decay was comparable to that of other charmless three-body baryonic modes. It was also found that the invariant mass of the λλ̄ system had a prominent near-threshold peak. The observed results show that the measurement achieved has the first observation of a meson decay to a hyperon pair.

    DOI: 10.1103/PhysRevLett.93.211801

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  • Search for CP violation in the decay B<sup>0</sup> → D*±D<sup>∓</sup>

    T. Aushev, Y. Iwasaki, K. Abe, K. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aziz, S. Bahinipati, A. M. Bakich, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, M. Danilov, M. Dash, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, N. C. Hastings, K. Hayasaka, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, J. H. Kang, J. S. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, S. K. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lange, G. Leder, S. H. Lee, T. Lesiak, J. Li, S. W. Lin, D. Liventsev, J. MacNaughton, F. Mandl, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida

    Physical Review Letters   93 ( 20 )   2004年11月

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    A search for the CP-violating asymmetry in the decay B0 → D*±D∓ using two methods of B 0 reconstruction, was performed. It was observed that in the full reconstruction method all daughter particles of the B0 were required to be detected. The presence of a lepton (ltag) in the event was required to provide flavor tagging, suppress the continuum background to a negligible level and also reduce the combinatorial BB̄ background. It was found that in the partial reconstruction case, flavor tagging was provided by the high momentum lepton required in the event.

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  • Study of double charmonium production in e<sup>+</sup>e<sup>-</sup> annihilation at √s ≈ 10.6 GeV

    K. Abe, K. Abe, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, Y. Ban, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, A. Chuvikov, S. Cole, M. Danilov, M. Dash, L. Y. Dong, S. Eidelman, V. Eiges, F. Fang, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, R. Guo, J. Haba, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W. S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, P. Koppenburg, P. Križan, P. Krokovny, S. Kumar, Y. J. Kwon, J. S. Lange, G. Leder, T. Lesiak, J. Li, S. W. Lin, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, R. Mizuk, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park

    Physical Review D - Particles, Fields, Gravitation and Cosmology   70   2004年1月

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    We present a new analysis of double charmonium production in e +e- annihilation. The observation of the processes e + e- → J/ψηc, J/ ψχc0, and J/ψηc(2S) is confirmed using a data set more than 3 times larger than that of Belle&#039;s previous report, and no evidence for the process e+e- → J/ψJ/ψ is found. We perform an angular analysis for J/ψηc production and set an upper limit on the production of J/ψJ/ψ. Processes of the type e+e- → ψ(2S)(cc)res have been observed for the first time; their rates are found to be comparable to those of e+e- → J/ψ(cc)res processes.

    DOI: 10.1103/PhysRevD.70.071102

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  • Measurement of φ<inf>3</inf> with Dalitz plot analysis of B <sup>±</sup> → D<sup>(*)</sup>K<sup>±</sup> decay

    A. Poluektov, K. Abe, T. Abe, H. Aihara, Y. Asano, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, A. Chuvikov, M. Danilov, M. Dash, L. Y. Dong, S. Eidelman, V. Eiges, Y. Enari, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, R. Guo, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W. S. Hou, Y. B. Hsiung, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, J. H. Kang, J. S. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, J. H. Kim, S. K. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Lee, T. Lesiak, J. Li, S. W. Lin, J. MacNaughton, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyata, R. Mizuk, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen

    Physical Review D - Particles, Fields, Gravitation and Cosmology   70   2004年1月

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    We present a measurement of the unitarity triangle angle φ3 using a Dalitz plot analysis of the three-body decay of the neutral D meson from the B± → D(*)K± process. The method employs the interference between D0 and D̄0 to extract both the weak and strong phases. We apply this method to a 140 fb-1 data sample collected by the Belle experiment. The analysis uses the modes B± → DK± and B± → D*K±, D* → Dπ0, where the neutral D meson decays into KSπ + π-. We obtain 146 signal candidates for B ± → DK± and 39 candidates for B ± → D*K±. From a combined maximum likelihood fit to the B± → DK± and B± → D*K± modes, we obtain φ3 = 77° -19°+17° (stat) ± 13°(syst) ± 11°(model). The corresponding 2 standard deviation interval is 26° &lt; φ3 &lt; 126°.

    DOI: 10.1103/PhysRevD.70.072003

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講演・口頭発表等

  • Tau physics at Belle II 招待 国際会議

    早坂 圭司

    The 4th KMI International Symposium (KMI2019)  2019年2月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Tau物理 招待

    早坂 圭司

    Flavor Physics Workshop 2018  2018年10月 

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    記述言語:日本語   会議種別:公開講演,セミナー,チュートリアル,講習,講義等  

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  • Study of the Lorentz structure of tau decays and the rare tau decays from Belle 招待 国際会議

    早坂 圭司

    XXXIX International Conference on High Energy Physics  2018年7月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Belle II実験のための分散コンピューティング運用監視システムの開発 (1)

    早坂 圭司

    日本物理学会第73回年次大会  2018年3月 

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    記述言語:日本語   会議種別:口頭発表(一般)  

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  • タウ崩壊に現れる新物理と少数飛跡事象を用いたダークセクター探索

    早坂 圭司

    日本物理学会第73回年次大会  2018年3月 

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    記述言語:日本語   会議種別:シンポジウム・ワークショップ パネル(指名)  

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  • New physics search in tau decays 招待

    早坂 圭司

    地上実験で検証可能な新物理  2017年11月 

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    記述言語:日本語   会議種別:口頭発表(招待・特別)  

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  • Belle IIでのtau、charm、hadronの物理

    早坂 圭司

    2017年11月 

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    記述言語:日本語   会議種別:公開講演,セミナー,チュートリアル,講習,講義等  

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  • Study of the Lorentz structure of $\tau$ decays from Belle 招待 国際会議

    早坂 圭司

    The European Physical Society Conference on High Energy Physics (EPSHEP2017)  2017年7月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Belle II 実験における新物理探索と精密測定 招待

    早坂 圭司

    素粒子物理学の進展2016  2016年9月 

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    記述言語:日本語   会議種別:口頭発表(招待・特別)  

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  • Future prospects for tau and low-multiplicity physics at Belle II 招待 国際会議

    早坂 圭司

    World Research Unit for Heavy Flavor Particle Physics Symposium 2016  2016年3月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Recent results in tau decays at Belle experiment 招待 国際会議

    早坂 圭司

    Flavor Physics & CP violation 2015  2015年5月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Monitoring system for the Belle II distributed computing 国際会議

    早坂 圭司

    21st International Conference on Computing in High Energy and Nuclear Physics 2015  2015年4月 

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    記述言語:英語   会議種別:ポスター発表  

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  • Lepton Flavour Violating Tau Decays at Belle 招待 国際会議

    早坂 圭司

    The 13th International Workshop on Tau Lepton Physics  2014年9月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Symmetry violation in tau decays 招待 国際会議

    早坂 圭司

    Interplay of Particle and Astroparticle Physics 2014  2014年8月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Electroweak physics from Belle 招待 国際会議

    早坂 圭司

    The 2009 Europhysics Conference on High Energy Physics  2009年7月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • τ崩壊におけるセカンドクラスカレントの探索

    早坂 圭司

    日本物理学会第64回年次大会  2009年3月 

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    記述言語:日本語   会議種別:口頭発表(一般)  

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  • Searches for LFV at B factories 招待 国際会議

    早坂 圭司

    Symposium on Prospects in the Physics of Discrete Symmetries  2008年12月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Belle 実験における$\phi$中間子を含む$\tau$崩壊の研究

    早坂 圭司

    日本物理学会第63回年次大会  2008年3月 

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    記述言語:日本語   会議種別:口頭発表(一般)  

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  • Recent results on $\tau$ decays on Belle 招待 国際会議

    早坂 圭司

    Towards the Precise Prediction of CP violation  2007年10月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Search for lepton flavor violation at B factories 招待 国際会議

    早坂 圭司

    The XXXIII International Conference on High Energy Physics  2006年7月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Search for $\tau\rightarrow e\gamma$ and $\mu\gamma$ 招待 国際会議

    早坂 圭司

    8th International Workshop on Tau-Lepton Physics  2004年9月 

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    記述言語:英語   会議種別:口頭発表(招待・特別)  

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  • Belle 実験におけるτ→μγによる新物理の探索

    早坂 圭司

    日本物理学会弟59回年次大会  2004年3月 

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    記述言語:日本語   会議種別:口頭発表(一般)  

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  • Belle 実験における稀崩壊モードτ→eγの探索

    早坂 圭司

    日本物理学会2003年秋季大会  2003年9月 

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    記述言語:日本語   会議種別:口頭発表(一般)  

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▶ 全件表示

共同研究・競争的資金等の研究

  • スーパーBファクトリー研究による素粒子物理学フロンティアの開拓と若手研究者の育成

    研究課題/領域番号:22K21347

    2022年12月 - 2029年3月

    制度名:科学研究費助成事業 国際共同研究加速基金(国際先導研究)

    研究種目:国際共同研究加速基金(国際先導研究)

    提供機関:日本学術振興会

    飯嶋 徹, 後田 裕, 樋口 岳雄, 早坂 圭司, 宮林 謙吉, 増澤 美佳, 金児 隆志

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    配分額:687830000円 ( 直接経費:529100000円 、 間接経費:158730000円 )

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  • 動的システムモデリングのための局所構造化ユニタリネットワークと接空間学習

    研究課題/領域番号:22H00512

    2022年4月 - 2026年3月

    制度名:科学研究費助成事業

    研究種目:基盤研究(A)

    提供機関:日本学術振興会

    村松 正吾, 安田 浩保, 大竹 雄, 早坂 圭司, 劉 雪峰, 永原 正章, 小野 峻佑

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    配分額:42510000円 ( 直接経費:32700000円 、 間接経費:9810000円 )

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  • 自然法則に基づく安定性河道とデータ駆動型の河道の予知保全法による河川の多重性向上

    研究課題/領域番号:21H04596

    2021年4月 - 2025年3月

    制度名:科学研究費助成事業

    研究種目:基盤研究(A)

    提供機関:日本学術振興会

    安田 浩保, 村松 正吾, 早坂 圭司, 大竹 雄

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    配分額:41990000円 ( 直接経費:32300000円 、 間接経費:9690000円 )

    扇状地前後に位置する河川では、底面に交互砂州と呼ばれる起伏形状が自発的かつ例外なく形成される。交互砂州が発達した河川における平水時の澪筋は、導波管現象のように両岸の間を対角線状に反射する形状となる。本研究では、まず、交互砂州が発達する河川における普遍的な幾何学的形状の探索を行い、その中で自発的に形成される澪筋が形状安定性に優れることに着目し、その形状を定量化した。次に、実河川で見られた自発的澪筋の川幅を初期に与える模型実験と実河川のそれぞれでを行い、その形状安定性は非常に優れることを実証した。また、初期の底面を平坦とし、そこから交互砂州が徐々に形成される過程について高い空間分解能かつ高頻度に測定した。これは、交互砂州の形成の端緒の測定の初めての成功と言え、今後、交互砂州の形成の機構解明とそれに基づく制御への応用が期待できる。ただし、2021年度の研究において、移動床水理の時間発展のアンサンブル計算を行ったところ、移動床水理にはカオス性を内在する結果が得られた。
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    本研究では、本研究グループが独自に開発したStream Tomography: STという模型実験における移動床水理の高い空間分解能かつ高頻度な測定法の拡張を行った。具体的には、STにより高い分解能かつ高頻度に取得される水面と底面の観測ビッグデータの数理的な処理により、流れの支配方程式を用いず、これらの測定値と同等の空間分解能で流速の推定を可能とした。上記の通り、移動床水理はカオス性を内在する結果が得られ、モデル駆動型解析による長期予測は得策ではないことが示唆された。拡張されたSTにより得られる観測ビッグデータのデータ駆動型解析によりモデル駆動型解析の代替えや補強が可能となる結果も得つつある。具体的には、STの観測ビッグデータを特異値分解することで、河川の物理的な状態を把握できる可能性があることがわかってきた。

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  • ミュオン異常磁気能率・電気双極子能率の超精密測定

    研究課題/領域番号:20H05625

    2020年7月 - 2026年3月

    制度名:科学研究費助成事業

    研究種目:特別推進研究

    提供機関:日本学術振興会

    三部 勉, 吉岡 瑞樹, 近藤 恭弘, 早坂 圭司, 飯沼 裕美, 佐々木 憲一, 飯嶋 徹, 大谷 将士

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    配分額:636220000円 ( 直接経費:489400000円 、 間接経費:146820000円 )

    予定していた項目について計画通り進めることができた。[検出器]検出器構成要素のシリコンストリップセンサーを量産した。実機仕様読み出し集積回路を製作した。信号伝送用のフレキシブルプリント基板及びピッチアダプターも実機仕様の量産が完了した。また、検出器の最小モジュール(1/4ベーン)の組立て方法の検討に着手した。[磁場測定]磁場測定用プローブの既存読み出し回路の評価を行ない、微調整用可変キャパシタの追加の必要性を確認した。非磁性品ではない一部回路素子を交換するため、市場調査を行って代替品を確定した。既存読み出し回路を4chまで並列に接続し、RFコイルのサイズや距離を調整し同時測定を実現した。[計算機]ソフトウェア配布手段としてcvmfsの採用を決定し準備を進めた。並行してグリッド認証によるネットワークをまたぐ計算機の利用法の検討を進めた。試験用に新潟大学に計算機サーバ1台と100TBのデータ蓄積装置を導入し検証環境を整備した。[ミュオン源]ミュオニウムイオン化試験の準備として、既存旧型真空チェンバーを利用して、J-PARCの実験エリアに合わせた装置改造を行った後、実験エリアに搬入し、装置整備を進めた。これと並行して本実験用ミュオン源真空チェンバーの設計を進めた。[加速器]ミュオン加速器の第二段加速器の前段部IH-DTLの詳細設計を完了し、製作に着手した。さらに後段部の加速器DAW-CCLの初段モジュールの設計ならびに輸送部の電磁石設計を完了した。また、加速器運転に必要となる真空、および高周波機器を準備した。[入射]加速器出口から蓄積磁石までの輸送ライン設計に着手した。蓄積磁石鉄ヨーク部のビーム入射通路の斜め入射角度を決定し、入射ポイント付近でのステアリング磁石の設計、電源回路の設計に着手した。パルス電極を試作し、電場によるパルスビームチョップの原理実証・実機設計に必要な情報を得た。

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  • Xバンドレーダとデータ駆動の融合による高分解能かつ多元的な洪水モニタリングの創出

    研究課題/領域番号:20K20543

    2020年7月 - 2023年3月

    制度名:科学研究費助成事業

    研究種目:挑戦的研究(開拓)

    提供機関:日本学術振興会

    安田 浩保, 村松 正吾, 早坂 圭司, 大竹 雄, 岡田 将治, 萬矢 敦啓

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    配分額:25480000円 ( 直接経費:19600000円 、 間接経費:5880000円 )

    一般にマイクロ波は、陸地や構造物などの固体での反射強度は強く、河川水などの流体などでは吸収されてその反射強度は微弱となる。本研究では、Xバンドレーダーを用いて河川に向けてマイクロ波を発射し、マイクロ波の発射位置から2km程度の位置の河川の水面からもマイクロ波が反射されることを明らかにした。また、得られたマイクロ波の反射強度の空間分布の数理的な処理により、数mの極めて細密な間隔で左右岸のそれぞれの水位を数秒ごとに測定できることを実証した。現在の洪水時の危機管理は、数kmごとに配置された水位計とCCTVカメラを用いて行われているが、洪水時の河川の挙動をこれらの機材により空間的に連続して把握することはできず、特に夜間はカメラの有効範囲が大幅に限定される。一方で、本研究は、洪水時の危機管理にマイクロ波を用いれば、昼夜を問わずに空間的に連続した把握が可能となることを示した。
    <BR>
    河川の水面から得られるマイクロ波の反射強度画像を時間方向に観察すると水表面の流れを捉えたものと考えられる画像が認められる。水表面の流れに対応した紋様はその地点における流速と相関が高いことに着目し、その検証を行った。具体的には、UAVにより水表面の紋様の動画を撮影し、その動画の画像解析から水表面の流速の推定を行った。同様に、マイクロ波の反射強度の動画についても同様の画像解析を行った。両者の画像解析から得られた水表面の流速を比較したところ良好に一致することを明らかにした。
    <BR>
    上記の通り、水位と流速のそれぞれを高い空間分解能かつ数秒ほどの高い空間分解能で測定できることを実証した。河川に照射したマイクロ波の反射強度の空間分布に基づき実河川のデジタルツインの構築が可能となりつつある。

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  • 流路健全性の保全・回復を目的とするデータ駆動型の河道能動制御法

    研究課題/領域番号:19K22026

    2019年6月 - 2021年3月

    制度名:科学研究費助成事業 挑戦的研究(萌芽)

    研究種目:挑戦的研究(萌芽)

    提供機関:日本学術振興会

    村松 正吾, 安田 浩保, 早坂 圭司, 大竹 雄

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    配分額:6370000円 ( 直接経費:4900000円 、 間接経費:1470000円 )

    本研究では,河川流路の健全性の保全と回復を実現する河道能動制御法を提案した.河川流路変動を制御するためのサイバー・フィジカル・システム(CPS)を構想し,その構築に役立つ技術として,データ駆動による河床変動の時間発展式の導出と流路変動の推定アルゴリズムを開発した.また,水系全体の水位分布の予測に関する手法も提案した.
    流路を健全な状態に保つため,水制の最適配置制御を行うプロトタイプCPSを構築し,センシングからアクチュエーションまでの一連の処理を実現し,その評価と課題の整理を行った.
    研究成果として,国内学会にて7件,国際会議にて2件の発表を行った.

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  • Belle II実験で探るタウレプトンフレーバ構造

    研究課題/領域番号:19H00682

    2019年4月 - 2024年3月

    制度名:科学研究費助成事業 基盤研究(A)

    研究種目:基盤研究(A)

    提供機関:日本学術振興会

    早坂 圭司, 居波 賢二, 今野 智之

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    担当区分:研究代表者  資金種別:競争的資金

    配分額:44590000円 ( 直接経費:34300000円 、 間接経費:10290000円 )

    前年度に引き続きBelle II実験のデータ解析の準備としてBelle II実験で取得されたデータの理解を深めるための研究を行った。τ崩壊中の中性π粒子の検出効率の系統誤差をτ→3ππ0ν過程を用いて評価し、光子の再構成状況が実験当初に比べ背景事象の頻度が減少しデータの質が向上してきていることを明らかにした。また、2光子過程を用いてレプトン識別効率の系統誤差も行い、これについてはよりシステマティックに評価を続ける方法を検討した。この成果をもとにBelle II実験におけるτのレプトニック崩壊を使ったレプトンユニバーサリティ評価の可能性を検討しμチャンネルで96%,電子チャンネルで98%の純度で評価可能であることを明らかにした。τ崩壊中のCP非保存研究のためにτ→Ksπν過程の解析を行い、各種の運動学的分布がシミュレーションとデータでよく一致していることを明らかにした。また、並行してBelle II実験のデータ収集が順調ではないことへの対応策としてBelle実験のデータを用いて複数の崩壊様式についてのタウレプトンフレーバの破れの感度向上研究を行い探索感度を評価した。
    本研究計画で得られた成果に関して3件の国際会議への招待講演があった。
    前年度に解析を終えたBelle実験のτ→lγ探索の結果については、Q1雑誌であるJournal of High Energy Physicsに論文として公表した。

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  • 新しいレプトン対称性の破れの探求

    研究課題/領域番号:18H05226

    2018年6月 - 2023年3月

    制度名:科学研究費助成事業 基盤研究(S)

    研究種目:基盤研究(S)

    提供機関:日本学術振興会

    飯嶋 徹, 早坂 圭司, 角野 秀一, 三部 勉

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    配分額:191620000円 ( 直接経費:147400000円 、 間接経費:44220000円 )

    本研究では、素粒子現象における新しいレプトン対称性の破れを探索し、標準理論を超える新物理発見を目指す。特に、Belle II 実験におけるB 中間子崩壊でのレプトン普遍性の破れと、タウレプトン崩壊でのレプトンフレーバー保存則の破れを探求し、そのために必要な検出器の性能改良、ビッグデータ解析技術の開発を進める。さらに、Belle II実験の技術の応用や電子-陽電子衝突断面積の精密測定により、ミューオン異常磁気能率(g-2)測定実験の精度向上を図ることを目的としている。
    H30年度においては、Belle II実験における電子陽電子衝突実験が始まり、その初期データを使って、粒子識別性能や光子エネルギー分解能などの実験の基礎性能評価を進め、B中間子やτレプトンの生成を再確認した。また、本研究参画研究者が中心となって製作したTOP検出器とA-RICH検出器の運転を開始し性能検証を進めるとともに、今後の本格データ収集に向け、データの高速転送やグリッド計算によるデータ処理の情報を可視化するシステム構築も進めた。さらに、将来の実験高度化に向けた開発研究として、TOP用光検出器MCP-PMTの性能改善や、A-RICH用の新光センサーとしてシリコン光電子増倍管を用いたシステムの検討を始めた。
    一方、J-PARCにおけるミューオンg-2の精密測定の要となる低エミッタンスミューオンビーム生成に向けて、RF空洞を用いたミューオンビームのバンチングおよび加速の実証試験を行った。MCPを用いた高時間分解能ミューオン測定器を開発し、加速ビームが予想通りのバンチ構造を持つことを確かめた。また、ミューオン源に関するシミュレーションを構築し、生成標的の最適化を可能にした。Belle IIにおける電子-陽電子衝突断面積の精密測定に向けて、始状態輻射過程によるρ中間子生成断面積の確認を行った。

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  • 統合解析による新物理の高精度探索

    研究課題/領域番号:16H03993

    2016年4月 - 2021年3月

    制度名:科学研究費助成事業 基盤研究(B)

    研究種目:基盤研究(B)

    提供機関:日本学術振興会

    伊藤 領介, 両角 卓也, 野尻 美保子, 石川 明正, 田中 実, 早坂 圭司, 堺井 義秀

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    配分額:16900000円 ( 直接経費:13000000円 、 間接経費:3900000円 )

    統合解析を行うフレームワークに組み込む新物理模型のコードの開発を中心に行った。
    特にドイツグループの開発したEOSと呼ばれる新物理模型のコードを、EvtGenとよばれるB中間子の崩壊過程を再現するモンテカルロイベントジェネレーターに組み込むことに成功した。この結果として新物理のパラメータであるWilson Coefficientを与えることにより、Belle II実験で新物理の探索に使用されるB->K*l+l-崩壊の終状態の角度分布を再現できるようになり、統合解析によりパラメーターの値を決めるようにするための土台を整えることができた。
    また多変量解析を用いた統合解析フレームワークの開発に着手した。TMVAと呼ばれる高エネルギー実験のデータ解析に用いられている多変量解析のソフトウェアを使って、実験から得られる生データに対して多変量解析をおこなうことで、新物理のパラメーターが決定できることを示した。

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  • タウレプトンをプローブとする新物理探索

    研究課題/領域番号:26220706

    2014年5月 - 2019年3月

    制度名:科学研究費助成事業 基盤研究(S)

    研究種目:基盤研究(S)

    提供機関:日本学術振興会

    飯嶋 徹, 早坂 圭司, 居波 賢二

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    配分額:194480000円 ( 直接経費:149600000円 、 間接経費:44880000円 )

    本研究では、世界最高輝度を誇るKEKBファクトリー実験を40倍に増強したスーパーBファクトリー実験にむけ、我々が独自に開発したTOP粒子識別装置の技術確立を達成するとともに、名古屋大学データ解析装置を増強して大量のデータ解析やシミュレーション事象の生成が可能な環境を構築し、いち早く新物理を発見できる体制を整えること、これにより、タウLFV崩壊や、B中間子タウオニック崩壊の測定から、TeV領域の新物理探索を進めることを目指している。
    TOP検出器については、既にインストールを完了したTOP検出器の読み出し回路ファームウェアのデバッグ作業、時間測定パラメータや光センサーのゲイン較正パラメータの綿密な調整を薦め、宇宙線統合試験による性能検証を行なった。その結果、宇宙線トラック通過時に発生したチェレンコフ光のリングイメージを確認するとともに、ほぼ予想通りの性能が得られることを確認した。
    Belle II データ解析のGRID計算機環境については、昨年度に当初目標の7.25k HEPSpecを達成していたが、H29年度には更にCPU 96コアを増強し、その結果として計算能力が 7kHepSpecから9.5kHepSpecまで向上した。その結果、高効率かつ安定にシミュレーションデータの生成が進んでいる。また、Belle IIコンピューティングシステム監視システムの開発を薦めた。
    物理解析では、昨年度に国際会議で口頭発表を行った Belle実験全データを用いたB→D* τ ν 崩壊の分岐比と τ レプトンの偏極度の世界初測定結果を投稿論文にまとめ発表した。また、Belle II 実験に向けて、Bタウオニック崩壊やレプトンフレーバーを破るタウ崩壊に関するスタディーを進めた。

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担当経験のある授業科目(researchmap)

  • 物理数学I

    機関名:新潟大学

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  • 物理学基礎BII

    機関名:新潟大学

     詳細を見る

  • 微分方程式と振動論

    機関名:新潟大学

     詳細を見る

  • 物理学基礎AII

    機関名:新潟大学

     詳細を見る

担当経験のある授業科目

  • プロジェクト研究特別概説

    2023年
    -
    現在
    機関名:新潟大学

  • 日本事情自然系A

    2023年
    -
    現在
    機関名:新潟大学

  • 理学基礎演習

    2022年
    -
    現在
    機関名:新潟大学

  • 高エネルギー物理学II

    2022年
    機関名:新潟大学

  • 自然科学総論I

    2022年
    機関名:新潟大学

  • 理学スタディ・スキルズ

    2022年
    機関名:新潟大学

  • 先端科学技術総論

    2022年
    機関名:新潟大学

  • 物理学基礎BII

    2022年
    -
    2021年
    機関名:新潟大学

  • 物理学特論VI

    2021年
    機関名:新潟大学

  • 専門力アクティブ・ラーニング

    2021年
    機関名:新潟大学

  • 高エネルギー物理学I

    2021年
    機関名:新潟大学

  • 医学物理学総論

    2020年
    -
    現在
    機関名:新潟大学

  • 現代物理学セミナーB

    2020年
    -
    現在
    機関名:新潟大学

  • 現代物理学セミナーA

    2020年
    -
    現在
    機関名:新潟大学

  • データサイエンス概論

    2019年
    -
    現在
    機関名:新潟大学

  • 素粒子物理学

    2019年
    -
    現在
    機関名:新潟大学

  • 先端科学技術総論

    2018年
    -
    2022年
    機関名:新潟大学

  • 理学スタディ・スキルズ

    2018年
    -
    2022年
    機関名:新潟大学

  • 専門力アクティブ・ラーニング

    2018年
    -
    2021年
    機関名:新潟大学

  • 安全教育

    2018年
    機関名:新潟大学

  • 物理学実験

    2018年
    機関名:新潟大学

  • 素粒子物理学II

    2018年
    機関名:新潟大学

  • 物理学実験C

    2017年
    -
    現在
    機関名:新潟大学

  • 物理学実験B

    2017年
    -
    現在
    機関名:新潟大学

  • 物理学実験A

    2017年
    -
    現在
    機関名:新潟大学

  • 振動論と微分方程式

    2017年
    -
    現在
    機関名:新潟大学

  • 物理学実験D

    2017年
    -
    2022年
    機関名:新潟大学

  • 高エネルギー物理学I

    2017年
    -
    2021年
    機関名:新潟大学

  • 物理学基礎BⅡ

    2017年
    -
    2020年
    機関名:新潟大学

  • 現代物理学

    2017年
    機関名:新潟大学

  • 物理学基礎ゼミ

    2017年
    機関名:新潟大学

  • 課題研究C

    2017年
    機関名:新潟大学

  • 課題研究D

    2017年
    機関名:新潟大学

  • 素粒子物理学I

    2017年
    機関名:新潟大学

  • 化学実験

    2017年
    機関名:新潟大学

  • 課題研究A

    2017年
    機関名:新潟大学

  • 課題研究B

    2017年
    機関名:新潟大学

  • 実験素粒子物理学II

    2016年
    -
    2020年
    機関名:新潟大学

  • 物理学基礎A II

    2016年
    機関名:新潟大学

  • 物理数学I

    2016年
    機関名:新潟大学

▶ 全件表示