2023/02/08 更新

写真a

サトウ ユウタロウ
佐藤 優太郎
SATO Yutaro
所属
教育研究院 自然科学系 数理物質科学系列 助教
自然科学研究科 数理物質科学専攻 助教
理学部 理学科 助教
職名
助教
外部リンク

学位

  • 博士(理学) ( 2013年3月 )

  • 修士(理学) ( 2010年3月 )

研究キーワード

  • Belle

  • g-2/EDM

  • B中間子

  • J-PARC

  • シリコン検出器

  • ミューオン

  • 素粒子実験

  • 素粒子物理学

経歴

  • 新潟大学   自然科学研究科 数理物質科学専攻   助教

    2021年4月 - 現在

  • 新潟大学   教育研究院 自然科学系 数理物質科学系列   助教

    2021年4月 - 現在

  • 新潟大学   理学部 理学科   助教

    2021年4月 - 現在

 

論文

  • Rabi-oscillation spectroscopy of the hyperfine structure of muonium atoms

    S. Nishimura, H. A. Torii, Y. Fukao, T. U. Ito, M. Iwasaki, S. Kanda, K. Kawagoe, D. Kawall, N. Kawamura, N. Kurosawa, Y. Matsuda, T. Mibe, Y. Miyake, N. Saito, K. Sasaki, Y. Sato, S. Seo, P. Strasser, T. Suehara, K. S. Tanaka, T. Tanaka, J. Tojo, A. Toyoda, Y. Ueno, T. Yamanaka, T. Yamazaki, H. Yasuda, T. Yoshioka, K. Shimomura

    Physical Review A   104 ( 2 )   2021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/physreva.104.l020801

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    その他リンク: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.104.L020801/fulltext

  • SliT: A Strip-Sensor Readout Chip With Subnanosecond Time Walk for the J-PARC Muon g-2/EDM Experiment 査読

    Tetsuichi Kishishita, Yutaro Sato, Yoichi Fujita, Eitaro Hamada, Tsutomu Mibe, Tsubasa Nagasawa, Shohei Shirabe, Masayoshi Shoji, Taikan Suehara, Manobu M. Tanaka, Junji Tojo, Yuki Tsutumi, Takashi Yamanaka, Tamaki Yoshioka

    IEEE TRANSACTIONS ON NUCLEAR SCIENCE   67 ( 9 )   2089 - 2095   2020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:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    A new silicon-strip readout chip named "SliT" has been developed for the measurement of the muon anomalous magnetic moment and electric dipole moment (EDM) of the muon at Japan Proton Accelerator Research Complex (J-PARC). The SliT chip is designed in the Silterra 180-nm CMOS technology with mixed-signal integrated circuits. An analog circuit incorporates a conventional charge-sensitive amplifier, shaping amplifiers, and two distinct discriminators for each of the 128 identical channels. A digital part includes storage memories, an event building block, a serializer, and low voltage differential signaling (LVDS) drivers. A distinct feature of the SliT is utilization of the zero-crossing architecture, which consists of a CR-RC filter followed by a CR circuit as a voltage differentiator. This architecture allows generating hit signals with subnanosecond amplitude-independent time walk, which is the primary requirement for the experiment. The test results show a time walk of 0.38 +/- 0.16 ns between 0.5 and 3 MIP signals. The equivalent noise charge is 1547 +/- 75 e(-) (rms) at C-det = 33 pF as a strip-sensor capacitance. SliT128C satisfies all requirements of the J-PARC muon g - 2/EDM experiment.

    DOI: 10.1109/TNS.2020.3012924

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  • Development of a front-end ASIC for silicon -strip detectors of the J-PARC muon g-2 /EDM experiment 査読

    Yutaro Sato, Yowichi Fujita, Eitaro Hamada, Tetsuichi Kishishita, Tsutomu Mibe, Osamu Sasaki, Masayoshi Shoji, Taikan Suehara, Manobu Tanaka, Junji Tojo, Tuki Tsutsumi, Takashi Yamanaka, Tamaki Yoshioka

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   969   2020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  

    DOI: 10.1016/j.nima.2020.164035

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  • Performance evaluation of a silicon strip detector for positrons/electrons from a pulsed a muon beam

    T. Aoyagi, Y. Honda, H. Ikeda, M. Ikeno, K. Kawagoe, T. Kohriki, T. Kume, T. Mibe, K. Namba, S. Nishimura, N. Saito, O. Sasaki, N. Sato, Y. Sato, H. Sendai, K. Shimomura, S. Shirabe, M. Shoji, T. Suda, T. Suehara, T. Takatomi, M. Tanaka, J. Tojo, K. Tsukada, T. Uchida, T. Ushizawa, H. Wauke, T. Yamanaka, T. Yoshioka

    Journal of Instrumentation   15 ( 4 )   2020年4月

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    掲載種別:研究論文(学術雑誌)  

    A high-intensity pulsed muon beam is becoming available at the at the Japan Proton Accelerator Research Complex (J-PARC). Many experiments to study fundamental physics using this high-intensity muon beam are proposed. An experiment to measure the muon magnetic moment anomaly (g-2) and the muon electric dipole moment (EDM) is one of these experiments and it requires a tracking detector for positrons from muon decay. Fine segmentation is required in a detector to tolerate the high rate of positrons. The time resolution is required to be much better than the muon anomalous spin precession period while a buffer depth of a front-end electronics needs to be much longer than the accelerated muon lifetime. Requirements of this detector also meet requirements of a measurement of the muonium hyperfine structure interval at the J-PARC and another experiment to measure the proton charge radius at Tohoku University. We have developed a single-sided silicon strip sensor with a 190 μm pitch, a front-end electronics with a sampling rate of 200 MHz and a buffer memory depth of 8192, and a data acquisition system based on DAQ-Middleware for the J-PARC muon g-2/EDM experiment. We have fabricated detector modules consisting of this sensor and the front-end electronics. Performance of fabricated detector modules was evaluated at a laboratory and a beam test using the positron beam at Tohoku University. The detector is confirmed to satisfy all requirements of the experiments except for the time walk, which will be solved by the next version of a front-end electronics.

    DOI: 10.1088/1748-0221/15/04/P04027

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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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    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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  • Prototype Front-end ASIC for Silicon-strip Detectors of J-PARC Muon g-2/EDM Experiment

    Yuki Tsutsumi, Tetsuichi Kishishita, Yutaro Sato, Masayoshi Shoji, Manobu M. Tanaka, Tsutomu Mibe, Junji Tojo

    Proceedings of Science   343   2019年1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)  

    We report on the development of a front-end ASIC for silicon-strip detectors
    of the J-PARC Muon g-2/EDM experiment. This experiment aims to measure the muon
    anomalous magnetic moment and electric dipole moment precisely to explore new
    physics beyond the Standard Model. Since the time and momentum of positrons
    from muon decay are key information in the experiment, a fast response with
    high granularity is demanded to silicon-strip detectors as the positron
    tracker. The readout ASIC is thus required to tolerate a high hit rate of 1.4
    MHz per strip and to have deep memory for the period of 40 us with 5 ns time
    resolution. To satisfy the experimental requirements, an analog prototype ASIC
    was newly designed with the Silterra 180 nm CMOS technology. In the evaluation
    test, the time-walk was demonstrated to reach 0.8~ns with a sufficient dynamic
    range of 6~MIPs and pulse width of 45~ns for 1 MIP event. The design details
    and performance of the ASIC are discussed in this article.

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    その他リンク: http://arxiv.org/pdf/1901.10181v1

  • Development of silicon strip detector for J-PARC muon g-2/EDM experiment

    Yutaro Sato, Masahiro Ikeno, Tetsuichi Kishishita, Takashi Kohriki, Tatsuya Kume, Tsutomu Mibe, Takeshi Murakami, Naohito Saito, Osamu Sasaki, Nobuhiko Sato, Hiroshi Sendai, Masayoshi Shoji, Toshikazu Takatomi, Manobu Tanaka, Tomohisa Uchida, Kazuki Ueno, Hirokazu Ikeda, Takumi Ito, Kiyotomo Kawagoe, Masato Matama, Shohei Shirabe, Taikan Suehara, Junji Tojo, Yuki Tsutsumi, Takashi Yamanaka, Tamaki Yoshioka, Shoichiro Nishimura, Hiromasa Yasuda

    Proceedings of Science   340   2019年

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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)  

    The muon anomalous magnetic moment (g−2) and electric dipole moment (EDM) are sensitive to new physics beyond the Standard Model. We aim to measure (g−2) with a precision of 0.1 parts per million and search for EDM with a sensitivity of 10 e·cm at J-PARC. In this experiment, we use a silicon strip detector with high granularity and fast response to detect positrons from muon decay. We report on the development status of the silicon strip detector. µ µ − 21

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  • Performance of Front-end ASIC and its evaluation with Silicon Strip Sensor for J-PARC Muon g-2/EDM Experiment 査読

    Y. Sato, H. Ikeda, M. Ikeno, T. Ito, K. Kawagoe, T. Kishishita, T. Kohriki, T. Kume, M. Matama, T. Mibe, T. Murakami, T. Nagasawa, S. Nishimura, N. Saito, O. Sasaki, S. Shirabe, M. Shoji, T. Suehara, M. Tanaka, J. Tojo, T. Uchida, K. Ueno, H. Yasuda, T. Yoshioka

    2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings   2018年11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)  

    © 2017 IEEE. The muon anomalous magnetic moment (g -2)-{\mu} and electric dipole moment (EDM) are sensitive to new physics beyond the Standard Model. We aim to measure ( g -2 ) -{\mu} with a precision of 0.1 parts per million and search for EDM with a sensitivity of 10 -21 e. cm at J-PARC. In this experiment, we use a silicon strip detector with high granularity and fast response to detect positrons from muon decay. The readout ASIC is required to tolerate a high hit rate of 1.4 MHz per strip, to be stable to the change of hit rate by a factor of 1 /150, and to have deep memory for the period of \sim 40 \mu \mathrm{s} with 5 ns resolution. The prototype readout ASIC SliT128A has been fabricated using the Silterra 0.18- \mu \mathrm{m} CMOS process. We also connected the SliT128A with a silicon strip sensor and tested it with a muon beam at J-PARC. In this paper, we report the performance of the prototype ASIC itself and the prototype detector module.

    DOI: 10.1109/NSSMIC.2017.8532754

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  • A challenge to lepton universality in B-meson decays 査読

    Gregory Ciezarek, Manuel Franco Sevilla, Brian Hamilton, Robert Kowalewski, Thomas Kuhr, Vera Lueth, Yutaro Sato

    NATURE   546 ( 7657 )   227 - 233   2017年6月

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    記述言語:英語   出版者・発行元:NATURE PUBLISHING GROUP  

    One of the key assumptions of the standard model of particle physics is that the interactions of the charged leptons, namely electrons, muons and taus, differ only because of their different masses. Whereas precision tests comparing processes involving electrons and muons have not revealed any definite violation of this assumption, recent studies of B-meson decays involving the higher-mass tau lepton have resulted in observations that challenge lepton universality at the level of four standard deviations. A confirmation of these results would point to new particles or interactions, and could have profound implications for our understanding of particle physics.

    DOI: 10.1038/nature22346

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    arXiv

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    その他リンク: http://arxiv.org/pdf/1703.01766v3

  • Measurement of the branching ratio of B0 →d∗+τ- ν τ relative to B 0 →d∗+ℓ −νℓ 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. Bračko, D. Červenkov, 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. DoleŽal, 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. Kodyš, 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

    Physical Review D   94 ( 7 )   072007   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)  

    © 2016 American Physical Society. We report a measurement of the ratio R(D∗)=B(B0→D∗+τ-ντ)/B(B0→D∗+ν), where denotes an electron or a muon. The results are based on a data sample containing 772×106 BB pairs recorded at the (4S) resonance with the Belle detector at the KEKB e+e- collider. We select a sample of B0B0 pairs by reconstructing both B mesons in semileptonic decays to D∗ ±. We measure R(D∗)=0.302±0.030(stat)±0.011(syst), which is within 1.6σ of the Standard Model theoretical expectation, where the standard deviation σ 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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  • Measurement of the branching ratio of (B)over-bar(0) -> D*(+)tau(-)(nu)over-bar(tau) relative to (B)over-bar(0) -> 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) -> D*(+)tau(-)(nu) over bar (tau))/B((B) over bar (0) -> 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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  • Measurement of the lepton forward-backward asymmetry in B -> 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 )   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 -> 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 -> 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) > 10.2 GeV2/c(2), A(FB) < 0 is excluded at the 2.3 sigma level, where sigma is the standard deviation. For q(2) < 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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  • Development of the micro-channel plate photomultiplier for the Belle II time-of-propagation counter 査読

    Shigeki Hirose, Toru Iijima, Kenji Inami, Daiki Furumura, Tomokatsu Hayakawa, Yuji Kato, Kodai Matsuoka, Ryo Mizuno, Yutaro Sato, Kazuhito Suzuki, Takuya Yonekura

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   787   293 - 296   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:ELSEVIER  

    The time-of-propagation counter for the Belle II experiment is a new particle identification device using ring imaging Cherenkov technique. In order to detect each Cherenkov photon with a timing precision of 30-40 ps in a 1.5 T magnetic field, a micro-channel plate photomultiplier tube is a suitable device for the TOP counter. By introducing an atomic layer deposition technique on the micro-channel plate surface, the tube lifetime was improved by a factor 01 3-10 relative to more conventional devices. A total of 530 tubes have been produced. To ensure appropriate tube performance, the quantum efficiency, gain and transit time spread have been measured for all units. The results from each measurement are discussed. Results from a beamtest with a 2 GeV/c positron beam are also reported and demonstrate the good tube performance. (C) 2015 Elsevier B.V. All rights reserved

    DOI: 10.1016/j.nima.2014.12.082

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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. Bračko, T. E. Browder, D. Červenkov, M. C. Chang, B. G. Cheon, K. Chilikin, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, Z. DoleŽal, Z. Drásal, 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. Kodyš, S. Korpar, P. KriŽan, 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. Pesántez, M. Petrič, L. E. Piilonen, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov

    Physical Review Letters   114 ( 21 )   1-6   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)  

    © 2015 American Physical Society. 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-→A′h′, with h′→A′A′. We investigate ten exclusive final states with A′→e+e-, μ+μ-, or π+π- in the mass ranges 0.1GeV/c2<mA′<3.5GeV/c2 and 0.2GeV/c2<mh′<10.5GeV/c2. We also investigate three inclusive final states 2(e+e-)X, 2(μ+μ-)X, and (e+e-)(μ+μ-)X, where X denotes a dark photon candidate detected via missing mass, in the mass ranges 1.1GeV/c2<mA′<3.5GeV/c2 and 2.2GeV/c2<mh′<10.5GeV/c2. Using the entire 977fb-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×σBorn, on the Born cross section σBorn, and on the dark photon coupling to the dark Higgs boson times the kinetic mixing between the standard model photon and the dark photon, αD×ε2. These limits improve upon and cover wider mass ranges than previous experiments. The limits from the final states 3(π+π-) and 2(e+e-)X are the first placed by any experiment. For αD equal to 1/137, mh′<8GeV/c2, and mA′<1GeV/c2, we exclude values of the mixing parameter ε above ∼8×10-4.

    DOI: 10.1103/PhysRevLett.114.211801

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  • Performance of fully instrumented detector planes of the forward calorimeter of a Linear Collider detector 査読

    H. Abramowicz, A. Abusleme, K. Afanaciev, J. Aguilar, E. Alvarez, D. Avila, Y. Benhammou, L. Bortko, O. Borysov, M. Bergholz, I. Bozovic-Jelisavcic, E. Castro, G. Chelkov, C. Coca, W. Daniluk, L. Dumitru, K. Elsener, V. Fadeyev, M. Firlej, E. Firu, T. Fiutowski, V. Ghenescu, M. Gostkin, H. Henschel, M. Idzik, A. Ishikawa, S. Kananov, S. Kollowa, S. Kotov, J. Kotula, D. Kozhevnikov, V. Kruchonok, B. Krupa, Sz Kulis, W. Lange, T. Lesiak, A. Levy, I. Levy, W. Lohmann, S. Lukic, C. Milke, J. Moron, A. Moszczynski, A. T. Neagu, O. Novgorodova, K. Oliwa, M. Orlandea, M. Pandurovic, B. Pawlik, T. Preda, D. Przyborowski, O. Rosenblat, A. Sailer, Y. Sato, B. Schumm, S. Schuwalow, I. Smiljanic, P. Smolyanskiy, K. Swientek, E. Teodorescu, P. Terlecki, W. Wierba, T. Wojton, S. Yamaguchi, H. Yamamoto, L. Zawiejski, I. S. Zgural, A. Zhemchugov

    JOURNAL OF INSTRUMENTATION   10   P05009   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:IOP PUBLISHING LTD  

    Detector-plane prototypes of the very forward calorimetry of a future detector at an e(+)e(-) collider have been built and their performance was measured in an electron beam. The detector plane comprises silicon or GaAs pad sensors, dedicated front-end and ADC ASICs, and an FPGA for data concentration. Measurements of the signal-to-noise ratio and the response as a function of the position of the sensor are presented. A deconvolution method is successfully applied, and a comparison of the measured shower shape as a function of the absorber depth with a Monte-Carlo simulation is given.

    DOI: 10.1088/1748-0221/10/05/P05009

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  • Measurement of the CP-violation parameter sin 2φ <inf>1</inf> with a new tagging method at the Y(5S) resonance 査読

    Sato Y, Yamamoto H, Aihara H, Asner D.M, Aulchenko V, Aushev T, Aziz T, Bakich A.M, Bhardwaj V, Bhuyan B, Bischofberger M, Bondar A, Bozek A, Bra?ko M, Browder T.E, Chang P, Chen P, Cheon B.G, Chilikin K, Chistov R, Cho I.-S, Cho K, Choi S.-K, Choi Y, Dalseno J, Doleal Z, Dr{\'a}sal Z, Eidelman S, Epifanov D, Fast J.E, Gaur V, Gabyshev N, Goh Y.M, Golob B, Haba J, Hara T, Hayasaka K, Hayashii H, Horii Y, Hoshi Y, Hou W.-S, Hyun H.J, Ishikawa A, Itoh R, Iwabuchi M, Iwasaki Y, Iwashita T, Julius T, Kapusta P, Kawasaki T, Kichimi H, Kiesling C, Kim H.J, Kim H.O, Kim J.B, Kim J.H, Kim K.T, Kim M.J, Kim S.K, Kim Y.J, Kinoshita K, Ko B.R, Kobayashi N, Kody P, Korpar S, Krian P, Krokovny P, Kuhr T, Kumar R, Kumita T, Kuzmin A, Kwon Y.-J, Lange J.S, Lee S.-H, Li J, Li Y, Liu C, Liu Z.Q, Louvot R, McOnie S, Miyabayashi K, Miyata H, Mizuk R, Mohanty G.B, Moll A, Muramatsu N, 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, Park H.K, Pedlar T.K, Petri? M, Piilonen L.E, Poluektov A, R{\"o}hrken M, Ryu S, Sahoo H, Sakai Y, Sanuki T, Schneider O, Schwanda C, Schwartz A.J, Seidl R, 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, Stypula J, Sumihama M, Sumiyoshi T, Tanaka S, Tatishvili G, Teramoto Y, Trabelsi K, Uchida M, Uglov T, Unno Y, Uno S, Urquijo P, Varner G, Varvell K.E, Wang C.H, Wang M.-Z, Wang P, Wang X.L, Watanabe M, Watanabe Y, Wicht J, Won E, Yabsley B.D, Yamashita Y, Yusa Y, Zhang Z.P, Zhilich V, Zhulanov V, Zupanc A

    Physical Review Letters   108 ( 17 )   2012年4月

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1103/PhysRevLett.108.171801

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  • Development of the balloon-borne sub-MeV gamma-ray Compton camera using an electron-tracking gaseous TPC and a scintillation camera 査読

    K. Ueno, T. Mizumoto, K. Hattori, N. Higashi, S. Iwaki, S. Kabuki, Y. Kishimoto, S. Komura, H. Kubo, S. Kurosawa, Y. Matsuoka, K. Miuchi, K. Nakamura, H. Nishimura, J. Parker, Y. Sato, T. Sawano, A. Takada, T. Tanimori

    JOURNAL OF INSTRUMENTATION   7 ( 1 )   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:IOP PUBLISHING LTD  

    We have developed an Electron-Tracking Compton Camera (ETCC) for use onboard a balloon to observe sub-MeV/MeV gamma rays from celestial objects. The ETCC is constructed with a three dimensional gaseous tracker for recoil electrons from Compton scattering, and GSO:Ce pixel scintillator arrays as absorber of the Compton-scattered gamma-ray. By using the ETCC, we can reconstruct the energy and direction of individual gamma rays. We have developed a prototype ETCC with a (30 cm)(3) TPC, and tested its performance in the range of 356 - 835 keV in the laboratory. As the result, we succeeded in taking images of gamma ray sources and determined a detection efficiency of 9.0x10(-6) and an effective area of 8.0x10(-3) cm(2) at 662 keV for the prototype ETCC. Furthermore, we developed a new power saving readout circuit for the scintillators that achieves the electric power consumption of 0.41 W/channel, an energy dynamic range of 81 - 1333 keV, and an energy resolution of 10.3% at full width at half maximum at 662 keV.

    DOI: 10.1088/1748-0221/7/01/C01088

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  • Radiation test on FD-SOI readout ASIC of pair-monitor for ILC 査読

    Yutaro Sato, Yasuo Arai, Hirokazu Ikeda, Tadashi Nagamine, Yosuke Takubo, Toshiaki Tauchi, Hitoshi Yamamoto

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   650 ( 1 )   106 - 110   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:ELSEVIER SCIENCE BV  

    The pair-monitor is a silicon pixel device that measures the beam profile at the interaction point of the International Linear Collider. It extracts information from the directional distribution of a large number of electron-positron pairs created by collision of bunches, and is required to tolerate radiation dose of about a few Mrad/year. We developed a prototype ASIC with OKI Semiconductor Co., Ltd. 0.2-mu m fully depleted SOI (FD-SOI) CMOS process and studied its radiation tolerance. In this paper, we describe the design of the readout circuit briefly and present the result of irradiation tests. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2010.12.149

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    その他リンク: http://arxiv.org/pdf/1006.4226v1

  • SOI readout ASIC of pair monitor for International Linear Collider 査読

    Yutaro Sato, Yasuo Arai, Hirokazu Ikeda, Tadashi Nagamine, Yosuke Takubo, Toshiaki Tauchi, Hitoshi Yamamoto

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   637 ( 1 )   53 - 59   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  

    The pair monitor extracts information on the beam profile at the interaction point of the International Linear Collider. It utilizes the electron and positron number density distribution in the plane perpendicular to the beam direction. The pairs of electrons and positrons are detected by pixel detectors placed close to the beam on both sides of the interaction point, and a readout ASIC that meets the stringent requirements has been developed. In order to measure the beam profile as a function of location within a train and to deal with the high hit rate, the pixel detector is read out in 16 time-slices per bunch train. We develop the prototype ASIC using a 0.2 mu m fully depleted SOI (FD-SOI) CMOS process (OKI Semiconductor Co., Ltd). In this paper, we describe the design of the readout circuit and present the results of the performance tests. (C) 2011 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2011.02.063

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  • Readout ASIC of pair-monitor for international linear collider 査読

    Yutaro Sato, Hirokazu Ikeda, Kazutoshi Ito, Akiya Miyamoto, Tadashi Nagamine, Rei Sasaki, Yosuke Takubo, Toshiald Tauchi, Hitoshi Yamamoto

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   623 ( 1 )   501 - 503   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:ELSEVIER  

    The pair-monitor is a beam profile monitor at the interaction point of the international linear collider. A prototype of the readout ASIC for the pair-monitor has been designed and tested. Since the pair-monitor uses the hit distribution of electrons and positrons generated by the beam-crossing to measure the beam profile, the readout ASIC is designed to count the number of hits. In a prototype ASIC, 36 readout cells were implemented by TSMC 0.25-mu m CMOS process. Each readout cell is equipped with an amplifier, comparator, 8-bit counter and 16 count-registers. By the operation test, all the ASIC component were confirmed to work correctly. As the next step, we develop the prototype ASIC with the silicon on insulator technology. It is produced with OKI 0.2-mu m FD-SOI CMOS process. (C) 2010 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2010.03.050

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  • Pixelated Readout Circuit for Pair-Monitor at International Linear Collider 査読

    Yutaro Sato, Kentaro Hashimoto, Hirokazu Ikeda, Kazutoshi Ito, Akiya Miyamoto, Tadashi Nagamine, Rei Sasaki, Yosuke Takubo, Toshiaki Tauchi, Hitoshi Yamamoto, Yasuhiro Yokoyama

    IEEE TRANSACTIONS ON NUCLEAR SCIENCE   57 ( 1 )   288 - 291   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:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC  

    The pair monitor measures the beam profile at the interaction point of the international linear collider. It extracts the information from the directional distribution of a large number of electron-positron pairs created by collision of bunches. The pairs are detected by pixel detectors placed close to the beam on both sides of the interaction point, and a readout ASIC that meets the stringent requirements has been developed. In order to measure the beam profile as a function of location within a train, and also to deal with the high hit rate, the pixel detector is read out in 16 time slices per bunch train. In this paper, we describe the design of the readout circuit and present the result of performance tests.

    DOI: 10.1109/TNS.2009.2037960

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MISC

  • B中間子崩壊におけるアノマリーの現状と今後の展望 査読

    高橋悠太, 廣瀬茂輝, 佐藤優太郎, 中村克朗

    日本物理学会誌   75 ( 6 )   16   2020年1月

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    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

    J-GLOBAL

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  • J-PARC muon g-2/EDM実験:シリコンストリップ検出器用読み出しASICの開発 II

    藤田陽一, 藤田陽一, 青柳泰平, 池田博一, 池田博一, 池野正弘, 池野正弘, 上野一樹, 上野一樹, 牛澤昂大, 内田智久, 内田智久, 川越清以, 岸下徹一, 岸下徹一, 久米達哉, 来見田将大, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐田智也, 佐藤伸彦, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 末原大幹, 末原大幹, 須江祐貴, 須田利美, 千代浩司, 千代浩司, 高富俊和, 田中真伸, 田中真伸, 塚田暁, 東城順治, 東城順治, 西村昇一郎, 西村昇一郎, 本多佑記, 眞玉将豊, 眞玉将豊, 三部勉, 三部勉, 村上武, 村上武, 安田浩昌, 安田浩昌, 山中隆志, 山中隆志, 吉岡瑞樹, 吉岡瑞樹, LEE W.

    日本物理学会講演概要集(CD-ROM)   75 ( 1 )   2020年

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  • J-PARC muon g-2/EDM実験:崩壊陽電子飛跡再構成アルゴリズムを用いた測定精度の見積り

    山中隆志, 佐藤優太郎, 須江祐貴, 末原大幹, 三部勉, 吉岡瑞樹, LEE Soohyung, LEE Woodo, DA SILVA Wilfrid

    日本物理学会講演概要集(CD-ROM)   75 ( 1 )   2020年

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  • J-PARC muon g-2/EDM実験:シリコンストリップ検出器の高位置精度の組み立て方法の開発

    来見田将大, 青柳泰平, 池田博一, 池田博一, 池野正弘, 池野正弘, 上野一樹, 上野一樹, 牛澤昂大, 内田智久, 内田智久, 川越清以, 岸下徹一, 岸下徹一, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐田智也, 佐藤伸彦, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 末原大幹, 末原大幹, 須江祐貴, 須田利美, 千代浩司, 千代浩司, 高富俊和, 田中真伸, 田中真伸, 塚田暁, 東城順治, 東城順治, 西村昇一郎, 西村昇一郎, 藤田陽一, 藤田陽一, 本多佑記, 眞玉将豊, 眞玉将豊, 三部勉, 三部勉, 村上武, 村上武, 安田浩昌, 安田浩昌, 山中隆志, 山中隆志, 吉岡瑞樹, 吉岡瑞樹, LEE W.

    日本物理学会講演概要集(CD-ROM)   75 ( 1 )   2020年

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  • J-PARC muon g-2/EDM実験:シリコンストリップ検出器における冷却システムの開発

    牛澤昂大, 青柳泰平, 池田博一, 池田博一, 池野正弘, 池野正弘, 上野一樹, 上野一樹, 内田智久, 内田智久, OH Jeawhan, 川越清以, 岸下徹一, 岸下徹一, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐田智也, 佐藤伸彦, 佐藤優太郎, 佐藤優太郎, JANGAM Viraj, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 須江祐貴, 須田利美, 千代浩司, 千代浩司, 高富俊和, 田中真伸, 田中真伸, 塚田暁, 堤裕樹, 堤裕樹, 東城順治, 東城順治, 南波和希, 西村昇一郎, 西村昇一郎, 本多佑記, 眞玉将豊, 眞玉将豊, 三部勉, 村上武, 村上武, 安田浩昌, 安田浩昌, 山中隆志, 山中隆志, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   74 ( 1 )   2019年

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  • J-PARC muon g-2/EDM実験:シリコンストリップ検出器の試験モジュールの製作と実機製作に向けた開発

    山中隆志, 山中隆志, 青柳泰平, 池田博一, 池田博一, 池野正弘, 池野正弘, 上野一樹, 上野一樹, 牛澤昂大, 内田智久, 内田智久, 川越清以, 岸下徹一, 岸下徹一, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐田智也, 佐藤伸彦, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 須江祐貴, 須田利美, 千代浩司, 千代浩司, 高富俊和, 田中真伸, 田中真伸, 塚田暁, 堤裕樹, 堤裕樹, 東城順治, 東城順治, 南波和希, 西村昇一郎, 西村昇一郎, 本多佑記, 眞玉将豊, 眞玉将豊, 三部勉, 三部勉, 村上武, 村上武, 安田浩昌, 安田浩昌, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   74 ( 1 )   2019年

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  • J-PARC muon g-2/EDM実験:シリコンストリップ検出器用読出しASICの設計と性能評価

    堤裕樹, 堤裕樹, 青柳泰平, 池田博一, 池田博一, 池野正弘, 池野正弘, 上野一樹, 上野一樹, 牛澤昂大, 内田智久, 内田智久, 川越清以, 岸下徹一, 岸下徹一, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐田智也, 佐藤伸彦, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 須江祐貴, 須田利美, 千代浩司, 千代浩司, 高富俊和, 田中真伸, 田中真伸, 塚田暁, 東城順治, 東城順治, 南波和希, 西村昇一郎, 西村昇一郎, 本多佑記, 眞玉将豊, 眞玉将豊, 三部勉, 三部勉, 村上武, 村上武, 安田浩昌, 安田浩昌, 山中隆志, 山中隆志, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   74 ( 1 )   2019年

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  • J-PARC muon g-2/EDM実験:シリコンストリップ検出器用読み出しASICの開発

    藤田陽一, 藤田陽一, 青柳泰平, 池田博一, 池田博一, 池野正弘, 池野正弘, 上野一樹, 上野一樹, 牛澤昂大, 内田智久, 内田智久, 川越清以, 岸下徹一, 岸下徹一, 久米達哉, 来見田将大, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐田智也, 佐藤伸彦, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 須江祐貴, 須田利美, 千代浩司, 千代浩司, 高富俊和, 田中真伸, 田中真伸, 塚田暁, 堤裕樹, 堤裕樹, 東城順治, 東城順治, 南波和希, 西村昇一郎, 西村昇一郎, 本多佑記, 眞玉将豊, 眞玉将豊, 三部勉, 三部勉, 村上武, 村上武, 安田浩昌, 安田浩昌, 山中隆志, 山中隆志, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   74 ( 2 )   2019年

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  • The Belle II Physics Book

    E. Kou, P. Urquijo, W. Altmannshofer, F. Beaujean, G. Bell, M. Beneke, I. I. Bigi, F. Bishara M. Blanke, C. Bobeth, M. Bona, N. Brambilla, V. M. Braun, J. Brod, A. J. Buras, H. Y. Cheng, C. W. Chiang, G. Colangelo, H. Czyz, A. Datta, F. De Fazio, T. Deppisch, M. J. Dolan, S. Fajfer, T. Feldmann, S. Godfrey, M. Gronau, Y. Grossman, F. K. Guo, U. Haisch, C. Hanhart, S. Hashimoto, S. Hirose, J. Hisano, L. Hofer, M. Hoferichter, W. S. Hou, T. Huber, S. Jaeger, S. Jahn, M. Jamin, J. Jones, M. Jung, A. L. Kagan, F. Kahlhoefer, J. F. Kamenik, T. Kaneko, Y. Kiyo, A. Kokulu, N. Kosnik, A. S. Kronfeld, Z. Ligeti, H. Logan, C. D. Lu, V. Lubicz, F. Mahmoudi, K. Maltman, M. Misiak, S. Mishima, K. Moats, B. Moussallam, A. Nefediev, U. Nierste, D. Nomura, N. Offen, S. L. Olsen, E. Passemar, A. Paul, G. Paz, A. A. Petrov, A. Pich, A. D. Polosa, J. Pradler, S. Prelovsek, M. Procura, G. Ricciardi, D. J. Robinson, P. Roig, S. Schacht, K. Schmidt-Hoberg, J. Schwichtenberg, S. R. Sharpe, J. Shigemitsu, N. Shimizu, Y. Shimizu, L. Silvestrini, S. Simula, C. Smith, P. Stoffer, D. Straub, F. J. Tackmann, M. Tanaka, A. Tayduganov, G. Tetlalmatzi-Xolocotzi, T. Teubner, A. Vairo, D. van Dyk, J. Virto, Z. Was, R. Watanabe, I. Watson, J. Zupan, R. Zwicky, F. Abudinen, I. Adachi, K. Adamczyk, P. Ahlburg, H. Aihara, A. Aloisio, L. Andricek, N. Anh Ky, M. Arndt, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, R. Ayad, T. Aziz, S. Baehr, S. Bahinipati, P. Bambade, Y. Ban, M. Barrett, J. Baudot, P. Behera, K. Belous, M. Bender, J. Bennett, M. Berger, E. Bernieri, F. U. Bernlochner, M. Bessner, D. Besson, S. Bettarini, V. Bhardwaj, B. Bhuyan, T. Bilka, S. Bilmis, S. Bilokin, G. Bonvicini, A. Bozek, M. Bracko, P. Branchini, N. Braun, R. A. Briere, T. E. Browder, L. Burmistrov, S. Bussino, L. Cao, G. Caria, G. Casarosa, C. Cecchi, D. Cervenkov, M. -C. Chang, P. Chang, R. Cheaib, V. Chekelian, Y. Chen, B. G. Cheon, K. Chilikin, K. Cho, J. Choi, S. -K. Choi, S. Choudhury, D. Cinabro, L. M. Cremaldi, D. Cuesta, S. Cunliffe, N. Dash, E. de, la, Cruz Burelo, E. De Lucia, G. De Nardo, M. De Nuccio, G. De Pietro, A. De, Yta Hernandez, B. Deschamps, M. Destefanis, S. Dey, F. Di Capua, S. Di Carlo, J. Dingfelder, Z. Dolezal, I. Dominguez Jimenez, T. V. Dong, D. Dossett, S. Duell, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, S. Fiore, A. Fodor, F. Forti, A. Frey, O. Frost, B. G. Fulsom, M. Gabriel, N. Gabyshev, E. Ganiev, X. Gao, B. Gao, R. Garg, A. Garmash, V. Gaur, A. Gaz, T. Gessler, U. Gebauer, M. Gelb, A. Gellrich, D. Getzkow, R. Giordano, A. Giri, A. Glazov, B. Gobbo, R. Godang, O. Gogota, P. Goldenzweig, B. Golob, W. Gradl, E. Graziani, M. Greco, D. Greenwald, S. Gribanov, Y. Guan, E. Guido, A. Guo, S. Halder, K. Hara, O. Hartbrich, T. Hauth, K. Hayasaka, H. Hayashii, C. Hearty, I. Heredia De, La Cruz, M. Hernandez Villanueva, A. Hershenhorn, T. Higuchi, M. Hoek, S. Hollitt, N. T. Hong Van, C. -L. Hsu, Y. Hu, K. Huang, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, M. Iwasaki, P. Jackson, W. W. Jacobs, I. Jaegle, H. B. Jeon, X. Ji, S. Jia, Y. Jin, C. Joo, M. Kuenzel, I. Kadenko, J. Kahn, H. Kakuno, A. B. Kaliyar, J. Kandra, K. H. Kang, T. Kawasaki, C. Ketter, M. Khasmidatul, H. Kichimi, J. B. Kim, K. T. Kim, H. J. Kim, D. Y. Kim, K. Kim, Y. Kim, T. D. Kimmel, H. Kindo, K. Kinoshita, T. Konno, A. Korobov, S. Korpar, D. Kotchetkov, R. Kowalewski, P. Krizan, R. Kroeger, J. -F. Krohn, P. Krokovny, W. Kuehn, T. Kuhr, R. Kulasiri, M. Kumar, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, S. Lacaprara, Y. -T. Lai, K. Lalwani, J. S. Lange, S. C. Lee, J. Y. Lee, P. Leitl, D. Levit, S. Levonian, S. Li, L. K. Li, Y. Li, Y. B. Li, Q. Li, L. Li Gioi, J. Libby, Z. Liptak, D. Liventsev, S. Longo, A. Loos, G. Lopez Castro, M. Lubej, T. Lueck, F. Luetticke, T. Luo, F. Mueller, Th. Mueller, C. MacQueen, Y. Maeda, M. Maggiora, S. Maity, E. Manoni, S. Marcello, C. Marinas, M. Martinez Hernandez, A. Martini, D. Matvienko, J. A. McKenna, F. Meier, M. Merola, F. Metzner, C. Miller, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, T. Moon, A. Morda, T. Morii, M. Mrvar, G. Muroyama, R. Mussa, I. Nakamura, T. Nakano, M. Nakao, H. Nakayama, H. Nakazawa, T. Nanut, M. Naruki, K. J. Nath, M. Nayak, N. Nellikunnummel, D. Neverov, C. Niebuhr, J. Ninkovic, S. Nishida, K. Nishimura, M. Nouxman, G. Nowak, K. Ogawa, Y. Onishchuk, H. Ono, Y. Onuki, P. Pakhlov, G. Pakhlova, B. Pal, E. Paoloni, H. Park, C. -S. Park, B. Paschen, A. Passeri, S. Paul, T. K. Pedlar, M. Perello, I. M. Peruzzi, R. Pestotnik, L. E. Piilonen, L. Podesta Lerma, V. Popov, K. Prasanth, E. Prencipe, M. Prim, M. V. Purohit, A. Rabusov, R. Rasheed, S. Reiter, M. Remnev, P. K. Resmi, I. Ripp-Baudot, M. Ritter, M. Ritzert, G. Rizzo, L. Rizzuto, S. H. Robertson, D. Rodriguez Perez, J. M. Roney, C. Rosenfeld, A. Rostomyan, N. Rout, S. Rummel, G. Russo, D. Sahoo, Y. Sakai, M. Salehi, D. A. Sanders, S. Sandilya, A. Sangal, L. Santelj, J. Sasaki, Y. Sato, V. Savinov, B. Scavino, M. Schram, H. Schreeck, J. Schueler, C. Schwanda, A. J. Schwartz, R. M. Seddon, Y. Seino, K. Senyo, O. Seon, I. S. Seong, M. E. Sevior, C. Sfienti, M. Shapkin, C. P. Shen, M. Shimomura, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, J. B. Singh, R. Sinha, S. Skambraks, K. Smith, R. J. Sobie, A. Soffer, A. Sokolov, E. Solovieva, B. Spruck, S. Stanic, M. Staric, N. Starinsky, U. Stolzenberg, Z. Stottler, R. Stroili, J. F. Strube, J. Stypula, M. Sumihama, K. Sumisawa, T. Sumiyoshi, D. Summers, W. Sutcliffe, S. Y. Suzuki, M. Tabata, M. Takahashi, M. Takizawa, U. Tamponi, J. Tan, S. Tanaka, K. Tanida, N. Taniguchi, Y. Tao, P. Taras, G. Tejeda Munoz, F. Tenchini, U. Tippawan, E. Torassa, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, Y. Usov, S. E. Vahsen, R. van Tonder, G. Varner, K. E. Varvell, A. Vinokurova, L. Vitale, M. Vos, A. Vossen, E. Waheed, H. Wakeling, K. Wan, M, Z. Wang, X. L. Wang, B. Wang, A. Warburton, J. Webb, S. Wehle, C. Wessel, J. Wiechczynski, P. Wieduwilt, E. Won, Q. Xu, X. Xu, B. D. Yabsley, S. Yamada, H. Yamamoto, W. Yan, W. Yan, S. B. Yang, H. Ye, I. Yeo, J. H. Yin, M. Yonenaga, T. Yoshinobu, W. Yuan, C. Z. Yuan, Y. Yusa, S. Zakharov, L. Zani, M. Zeyrek, J. Zhang, Y. Zhang, Y. Zhang, X. Zhou, V. Zhukova, V. Zhulanov, A. Zupanc

    2018年8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 present the physics program of the Belle II experiment, located on the<br />
    intensity frontier SuperKEKB $e^+e^-$ collider. Belle II collected its first<br />
    collisions in 2018, and is expected to operate for the next decade. It is<br />
    anticipated to collect 50/ab of collision data over its lifetime. This book is<br />
    the outcome of a joint effort of Belle II collaborators and theorists through<br />
    the Belle II theory interface platform (B2TiP), an effort that commenced in<br />
    2014. The aim of B2TiP was to elucidate the potential impacts of the Belle II<br />
    program, which includes a wide scope of physics topics: B physics, charm, tau,<br />
    quarkonium, electroweak precision measurements and dark sector searches. It is<br />
    composed of nine working groups (WGs), which are coordinated by teams of<br />
    theorist and experimentalists conveners: Semileptonic and leptonic B decays,<br />
    Radiative and Electroweak penguins, phi_1 and phi_2 (time-dependent CP<br />
    violation) measurements, phi_3 measurements, Charmless hadronic B decay, Charm,<br />
    Quarkonium(like), tau and low-multiplicity processes, new physics and global<br />
    fit analyses. This book highlights &quot;golden- and silver-channels&quot;, i.e. those<br />
    that would have the highest potential impact in the field. Theorists<br />
    scrutinised the role of those measurements and estimated the respective<br />
    theoretical uncertainties, achievable now as well as prospects for the future.<br />
    Experimentalists investigated the expected improvements with the large dataset<br />
    expected from Belle II, taking into account improved performance from the<br />
    upgraded detector.

    arXiv

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  • J‐PARCmuong‐2/EDM実験:シリコンストリップ検出器の実機製作に向けた開発状況

    山中隆志, 山中隆志, 池田博一, 池田博一, 池野正弘, 池野正弘, 伊藤拓実, 上野一樹, 上野一樹, 内田智久, 内田智久, 川越清以, 岸下徹一, 岸下徹一, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐藤伸彦, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 須江祐貴, 千代浩司, 千代浩司, 高富俊和, 田中真伸, 田中真伸, 堤裕樹, 堤裕樹, 東城順治, 東城順治, 西村昇一郎, 西村昇一郎, 真玉将豊, 真玉将豊, 三部勉, 三部勉, 村上武, 村上武, 安田浩昌, 安田浩昌, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.22pK206‐1   2018年3月

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    記述言語:日本語  

    J-GLOBAL

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  • J‐PARC muon g‐2/EDM実験:シリコンストリップ検出器用読み出しASICの性能評価

    堤裕樹, 堤裕樹, 池田博一, 池田博一, 池野正弘, 池野正弘, 伊藤拓実, 上野一樹, 上野一樹, 内田智久, 内田智久, 川越清以, 岸下徹一, 岸下徹一, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐藤伸彦, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 須江祐貴, 千代浩司, 千代浩司, 高富俊和, 田中真伸, 田中真伸, 東城順治, 東城順治, 西村昇一郎, 西村昇一郎, 真玉将豊, 真玉将豊, 三部勉, 三部勉, 村上武, 村上武, 安田浩昌, 安田浩昌, 山中隆志, 山中隆志, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   73 ( 1 )   ROMBUNNO.22pK206‐3   2018年3月

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    J-GLOBAL

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  • J-PARC muon g-2/EDM実験:崩壊陽電子飛跡の再構成アルゴリズムの開発

    山中隆志, 飯嶋徹, 飯嶋徹, 飯沼裕美, 上野一樹, 佐藤優太郎, 須江祐貴, 末原大幹, 西村昇一郎, 三部勉, 吉岡瑞樹, LEE Soohyung, DA SILVA Wifrid

    日本物理学会講演概要集(CD-ROM)   73 ( 2 )   2018年

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  • J-PARC muon g-2/EDM実験:シリコンストリップ検出器の性能評価試験

    西村昇一郎, 西村昇一郎, 池田博一, 池田博一, 池野正弘, 池野正弘, 伊藤拓実, 上野一樹, 上野一樹, 内田智久, 内田智久, 川越清以, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 田中真伸, 田中真伸, 東城順治, 東城順治, 長澤翼, 長澤翼, 真玉将豊, 真玉将豊, 三部勉, 三部勉, 村上武, 村上武, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   2017年

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  • J-PARC muon g-2/EDM実験:SliT2016TEGの性能評価

    堤裕樹, 池田博一, 池田博一, 池野正弘, 池野正弘, 伊藤拓実, 上野一樹, 上野一樹, 内田智久, 内田智久, 川越清以, 岸下徹一, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 千代浩司, 田中真伸, 田中真伸, 東城順治, 東城順治, 西村昇一郎, 西村昇一郎, 真玉将豊, 真玉将豊, 三部勉, 三部勉, 村上武, 村上武, 安田浩昌, 安田浩昌, 山中隆志, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   2017年

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  • J-PARC muon g-2/EDM実験:シリコンストリップセンサーの性能評価および品質保証システムの開発

    伊藤拓実, 池田博一, 池田博一, 池野正弘, 池野正弘, 上野一樹, 上野一樹, 内田智久, 内田智久, 川越清以, 岸下徹一, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 千代浩司, 千代浩司, 田中真伸, 田中真伸, 堤裕樹, 東城順治, 東城順治, 西村昇一郎, 西村昇一郎, 真玉将豊, 真玉将豊, 三部勉, 三部勉, 村上武, 村上武, 安田浩昌, 安田浩昌, 山中隆志, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   72 ( 2 )   2017年

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  • J-PARC muon g-2/EDM実験:シリコンストリップセンサー量産にむけた性能評価および品質検査手法開発

    伊藤拓実, 池田博一, 池田博一, 池野正弘, 池野正弘, 上野一樹, 上野一樹, 内田智久, 内田智久, 川越清以, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 田中真伸, 田中真伸, 東城順治, 東城順治, 長澤翼, 長澤翼, 西村昇一郎, 西村昇一郎, 真玉将豊, 真玉将豊, 三部勉, 三部勉, 村上武, 村上武, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   72 ( 1 )   2017年

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  • Measurement of the branching ratio of $\bar{B}^0 \rightarrow D^{*+} τ^- \barν_τ$ relative to $\bar{B}^0 \rightarrow D^{*+} \ell^- \barν_{\ell}$ decays with a semileptonic tagging method

    A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, K. Arinstein, Y. Arita, D. M. Asner, T. Aso, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, A. Bala, Y. Ban, V. Bansal, E. Barberio, M. Barrett, W. Bartel, A. Bay, I. Bedny, P. Behera, M. Belhorn, K. Belous, D. Besson, V. Bhardwaj, B. Bhuyan, M. Bischofberger, J. Biswal, T. Bloomfield, S. Blyth, A. Bobrov, A. Bondar, G. Bonvicini, C. Bookwalter, C. Boulahouache, A. Bozek, M. Brač, F. Breibeck, J. Brodzicka, T. E. Browder, D. Č, M. -C. Chang, P. Chang, Y. Chao, V. Chekelian, A. Chen, K. -F. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S. -K. Choi, Y. Choi, D. Cinabro, J. Crnkovic, J. Dalseno, M. Danilov, N. Dash, S. Di Carlo, J. Dingfelder, Z. Dolež, Z. Drásal, A. Drutskoy, S. Dubey, D. Dutta, K. Dutta, S. Eidelman, D. Epifanov, S. Esen, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, O. Frost, M. Fujikawa, B. G. Fulsom, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, D. Getzkow, R. Gillard, F. Giordano, R. Glattauer, Y. M. Goh, P. Goldenzweig, B. Golob, D. Greenwald, M. Grosse Perdekamp, J. Grygier, O. Grzymkowska, H. Guo, J. Haba, P. Hamer, Y. L. Han, K. Hara, T. Hara, Y. Hasegawa, J. Hasenbusch, K. Hayasaka, H. Hayashii, X. H. He, M. Heck, M. T. Hedges, D. Heffernan, M. Heider, A. Heller, T. Higuchi, S. Himori, S. Hirose, T. Horiguchi, Y. Hoshi, K. Hoshina, W. -S. Hou, Y. B. Hsiung, C. -L. Hsu, M. Huschle, H. J. Hyun, Y. Igarashi, T. Iijima, M. Imamura, K. Inami, G. Inguglia, A. Ishikawa, K. Itagaki, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, S. Iwata, W. W. Jacobs, I. Jaegle, H. B. Jeon, D. Joffe, M. Jones, K. K. Joo, T. Julius, H. Kakuno, J. H. Kang, K. H. Kang, P. Kapusta, S. U. Kataoka, E. Kato, Y. Kato, P. Katrenko, H. Kawai, T. Kawasaki, T. Keck, H. Kichimi, C. Kiesling, B. H. Kim, D. Y. Kim, H. J. Kim, H. -J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, C. Kleinwort, J. Klucar, B. R. Ko, N. Kobayashi, S. Koblitz, P. Kodyš, Y. Koga, S. Korpar, D. Kotchetkov, R. T. Kouzes, P. Križ, P. Krokovny, B. Kronenbitter, T. Kuhr, R. Kumar, T. Kumita, E. Kurihara, Y. Kuroki, A. Kuzmin, P. Kvasnič, Y. -J. Kwon, Y. -T. Lai, J. S. Lange, D. H. Lee, I. S. Lee, S. -H. Lee, M. Leitgab, R. Leitner, D. Levit, P. Lewis, C. H. Li, H. Li, J. Li, L. Li, X. Li, Y. Li, L. Li Gioi, J. Libby, A. Limosani, C. Liu, Y. Liu, Z. Q. Liu, D. Liventsev, A. Loos, R. Louvot, M. Lubej, P. Lukin, T. Luo, J. MacNaughton, M. Masuda, T. Matsuda, D. Matvienko, A. Matyja, S. McOnie, Y. Mikami, K. Miyabayashi, Y. Miyachi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, S. Mohanty, D. Mohapatra, A. Moll, H. K. Moon, T. Mori, T. Morii, H. -G. Moser, T. Müller, N. Muramatsu, R. Mussa, T. Nagamine, Y. Nagasaka, Y. Nakahama, I. Nakamura, K. R. Nakamura, E. Nakano, H. Nakano, T. Nakano, M. Nakao, H. Nakayama, H. Nakazawa, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, E. Nedelkovska, K. Negishi, K. Neichi, C. Ng, C. Niebuhr, M. Niiyama, N. K. Nisar, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, A. Ogawa, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Ono, Y. Onuki, W. Ostrowicz, C. Oswald, H. Ozaki, P. Pakhlov, G. Pakhlova, B. Pal, H. Palka, E. Panzenböck, C. -S. Park, C. W. Park, H. Park, K. S. Park, S. Paul, L. S. Peak, T. K. Pedlar, T. Peng, L. Pesá, R. Pestotnik, M. Peters, M. Petrič, L. E. Piilonen, A. Poluektov, K. Prasanth, M. Prim, K. Prothmann, C. Pulvermacher, M. V. Purohit, J. Rauch, B. Reisert, E. Ribež, M. Ritter, M. Röhrken, J. Rorie, A. Rostomyan, M. Rozanska, S. Rummel, S. Ryu, H. Sahoo, T. Saito, K. Sakai, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, N. Sasao, Y. Sato, V. Savinov, T. Schlü, O. Schneider, G. Schnell, P. Schönmeier, M. Schram, C. Schwanda, A. J. Schwartz, B. Schwenker, R. Seidl, Y. Seino, A. Sekiya, D. Semmler, K. Senyo, O. Seon, I. S. Seong, M. E. Sevior, L. Shang, M. Shapkin, V. Shebalin, C. P. Shen, T. -A. Shibata, H. Shibuya, S. Shinomiya, J. -G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, J. B. Singh, R. Sinha, P. Smerkol, Y. -S. Sohn, A. Sokolov, Y. Soloviev, E. Solovieva, S. Stanič, M. Starič, M. Steder, J. F. Strube, J. Stypula, S. Sugihara, A. Sugiyama, M. Sumihama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S. Y. Suzuki, Z. Suzuki, H. Takeichi, M. Takizawa, U. Tamponi, M. Tanaka, S. Tanaka, K. Tanida, N. Taniguchi, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, V. Trusov, Y. F. Tse, T. Tsuboyama, M. Uchida, T. Uchida, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, S. Uozumi, P. Urquijo, Y. Ushiroda, Y. Usov, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, K. Vervink, A. Vinokurova, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, J. Wang, M, Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, R. Wedd, S. Wehle, E. White, J. Wiechczynski, K. M. Williams, E. Won, B. D. Yabsley, S. Yamada, H. Yamamoto, J. Yamaoka, Y. Yamashita, M. Yamauchi, S. Yashchenko, H. Ye, J. Yelton, Y. Yook, C. Z. Yuan, Y. Yusa, C. C. Zhang, L. M. Zhang, Z. P. Zhang, L. Zhao, V. Zhilich, V. Zhukova, V. Zhulanov, M. Ziegler, T. Zivko, A. Zupanc, N. Zwahlen, O. Zyukova

    2016年3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 a measurement of ratio ${\cal R}(D^*) = {\cal B}(\bar{B}^0<br />
    \rightarrow D^{*+} \tau^- \bar{\nu}_{\tau})/{\cal B}(\bar{B}^0 \rightarrow<br />
    D^{*+} \ell^- \bar{\nu}_{\ell})$, where $\ell$ denotes an electron or a muon.<br />
    The results are based on a data sample containing $772\times10^6$ $B\bar{B}$<br />
    pairs recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the<br />
    KEKB $e^+ e^-$ collider. We select a sample of $B^0 \bar{B}^0$ pairs by<br />
    reconstructing both $B$ mesons in semileptonic decays to $D^{*\mp} \ell^{\pm}$.<br />
    We measure ${\cal R}(D^*)= 0.302 \pm 0.030({\rm stat)} \pm 0.011({\rm syst)}$,<br />
    which is within $1.6 \sigma$ of the Standard Model theoretical expectation,<br />
    where $\sigma$ is the standard deviation including systematic uncertainties.

    arXiv

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  • J-PARC muon g-2/EDM実験:シリコンストリップセンサー実機の基礎特性評価

    西村昇一郎, 西村昇一郎, 池田博一, 池田博一, 池野正弘, 池野正弘, 上野一樹, 上野一樹, 内田智久, 内田智久, 川越清以, 久米達哉, 高力孝, 高力孝, 齊藤直人, 佐々木修, 佐々木修, 佐藤優太郎, 佐藤優太郎, 庄子正剛, 庄子正剛, 調翔平, 調翔平, 末原大幹, 末原大幹, 田中真伸, 田中真伸, 東城順治, 東城順治, 長澤翼, 長澤翼, 真玉将豊, 真玉将豊, 三部勉, 三部勉, 村上武, 村上武, 吉岡瑞樹, 吉岡瑞樹

    日本物理学会講演概要集(CD-ROM)   71 ( 2 )   2016年

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  • Inclusive $B$ decays and exclusive radiative decays by Belle

    Yutaro Sato

    2014年11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  

    The $b \rightarrow s \gamma$, $b \rightarrow d \gamma$ and $b \rightarrow s
    \ell^+ \ell^-$ processes are allowed at higher order via the electroweak loop
    or box diagrams in the Standard model. It is sensitive probe to search for new
    physics beyond the Standard model because new particles might enter in the
    loop.
    We present preliminary results of branching fraction of the $\bar{B}
    \rightarrow X_s \gamma$, $CP$ asymmetry in the $\bar{B} \rightarrow X_{s+d}
    \gamma$, and the forward-backward asymmetry in the $\bar{B} \rightarrow X_s
    \ell^+ \ell^-$. The results are based on a data sample containing $772 \times
    10^6 B\bar{B}$ pairs recorded at the $\Upsilon(4S)$ resonance with the Belle
    detector at the KEKB $e^+ e^-$ collider.

    arXiv

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    その他リンク: http://arxiv.org/pdf/1411.3773v1

  • Search for lepton-flavor and lepton-number-violating Τ→ℓhh' decay modes

    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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    We search for lepton-flavor and lepton-number-violating. Τ decays into a lepton (ℓ= electron or muon) and two charged mesons (h,h&#039;=π± or K±) using 854 fb&lt;sup&gt;-1&lt;/sup&gt; of data collected with the Belle detector at the KEKB asymmetric-energy e&lt;sup&gt;+&lt;/sup&gt;e&lt;sup&gt;-&lt;/sup&gt; collider. We obtain 90% confidence level upper limits on the. Τ→ℓhh&#039; branching fractions in the range. (2.0-8.4)×10&lt;sup&gt;-8&lt;/sup&gt;. 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

    Scopus

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  • Precise measurement of the branching fractions for Bs0→Ds(*) +Ds(*)-and first measurement of the Ds*+Ds*-polarization using e+<sup>e-</sup> collisions

    S. Esen, A. J. Schwartz, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, K. Belous, B. Bhuyan, A. Bozek, M. Bračko, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. S. Cho, K. Cho, Y. Choi, J. Dalseno, M. Danilov, Z. Doležal, A. Drutskoy, S. Eidelman, M. Feindt, V. Gaur, J. Haba, T. Hara, 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, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Koblitz, P. Kodyš, S. Korpar, R. T. Kouzes, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, Y. J. Kwon, S. H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Y. Liu, D. Liventsev, R. Louvot, S. McOnie, H. Miyata, R. Mizuk, D. Mohapatra, A. Moll, N. Muramatsu, M. Nakao, H. Nakazawa, Z. Natkaniec, C. Ng, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, Y. Sakai, D. Santel, L. Santelj, T. Sanuki, Y. Sato

    Physical Review D - Particles, Fields, Gravitation and Cosmology   87 ( 3 )   2013年2月

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    記述言語:英語  

    We have made a precise measurement of the absolute branching fractions of Bs0→Ds(*)+Ds(*)- decays using 121.4 fb-1 of data recorded by the Belle experiment running at the Υ(5S) resonance. The results are B(Bs0→Ds+Ds-)=(0.58-0.09+0.11±0.13)%, B(Bs0→Ds*±Dsâ̂)=(1.76-0.22+0.23±0.40)%, and B(Bs0→Ds*+Ds*-)=(1.98-0.31-0.50+0.33+0.52)%; the sum is B(Bs0→Ds(*)+Ds(*)-)=(4.32-0.39-1.03+0.42+1.04)%. Assuming Bs0→Ds(*)+Ds(*)- saturates decays to CP-even final states, the branching fraction constrains the ratio ΔΓs/ cosâ¡12, where ΔΓs is the difference in widths between the two Bs-B̄s mass eigenstates, and 12 is the CP-violating phase in Bs-B ̄s mixing. We also measure for the first time the longitudinal polarization fraction of Bs0→Ds*+Ds*-; the result is 0.06-0.17+0.18±0.03. © 2013 American Physical Society.

    DOI: 10.1103/PhysRevD.87.031101

    Web of Science

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  • Study of beam profile measurement at interaction point in international linear collider 査読

    Kazutoshi Ito, Akiya Miyamoto, Tadashi Nagamine, Toshiaki Tauchi, Hitoshi Yamamoto, Yosuke Takubo, Yutaro Sato

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   608 ( 3 )   367 - 371   2009年9月

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    記述言語:英語   出版者・発行元:ELSEVIER SCIENCE BV  

    At the international linear collider, measurement of the beam profile at the interaction point is a key issue to achieve high luminosity. We report a simulation study on a new beam profile monitor, called the pair monitor, which uses the hit distribution of the electron-positron pairs generated at the interaction point. We obtained measurement accuracies of 5.1%, 10.0%, and 4.0% for the horizontal (sigma(x)), vertical (sigma(y)), and longitudinal beam sizes (sigma(z)), respectively, for 50 bunch crossings. (C) 2009 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.nima.2009.07.027

    Web of Science

    CiNii Article

    arXiv

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    その他リンク: http://arxiv.org/pdf/0901.4151v2

  • Beam Size Measurement with Pair Monitor and BeamCal

    Kazutoshi Ito, Akiya Miyamoto, Tadashi Nagamine, Yutaro Sato, Yosuke Takubo, Toshiaki Tauchi, Hitoshi Yamamoto

    2009年1月

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    At the International Linear Collider (ILC), measurement of the beam profile
    at the interaction point (IP) is a key issue to achieve high luminosity. We
    studied the beam size measurement by combination of Pair Monitor and BeamCal.
    We obtained measurement accuracies of 2.7%, and 6.6% for the horizontal, and
    vertical beam sizes, respectively, for 50 bunch crossings.

    arXiv

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    その他リンク: http://arxiv.org/pdf/0901.4446v2

  • Development of Pair Monitor

    Yosuke Takubo, Hirokazu Ikeda, Kazutoshi Ito, Akiya Miyamoto, Tadashi Nagamine, Rei Sasaki, Toshiaki Tauchi, Yutaro Sato, Hiroshi Yamamoto

    2009年1月

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    The pair monitor is a beam profile monitor at interaction point (IP) for the
    international linear collider (ILC). We have designed and developed the pair
    monitor as a silicon pixel sensor which is located at about 400 cm from IP. As
    the first step to develop the pair monitor, the readout ASIC was developed. In
    this paper, test results of the readout ASIC and the future plan are reported.

    arXiv

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    その他リンク: http://arxiv.org/pdf/0901.3429v1

▶ 全件表示

共同研究・競争的資金等の研究

  • 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

    日本学術振興会  科学研究費助成事業 基盤研究(S)  基盤研究(S)

    飯嶋 徹, 早坂 圭司, 居波 賢二, 林井 久樹, 相原 博昭, 松岡 広大, 鈴木 一仁, 加藤 悠司, 前田 陽祐, 佐藤 優太郎

      詳細を見る

    配分額:194480000円 ( 直接経費:149600000円 、 間接経費:44880000円 )

    B中間子のタウオニック崩壊(B→D(*)τν)や、レプトンフレーバーを破るタウ崩壊(τ→μγやτ→μμμなど)に関する物理研究を発展させ、SuperKEKB/Belle II実験における新物理探索を進めた。そのために独自の新型粒子識別装置TOPカウンターを完成し性能を確認した。また、名古屋大学の計算機環境を増強し、高効率かつ安定にシミュレーションデータを生成、Belle II実験での解析準備を進めた。加速器実験計画の遅れはあったが、Belle 実験の既存全データを用いたB 中間子タウオニック崩壊の解析を大幅に改良し、標準理論から2.6σ(世界平均では3.8σ)となる新物理の兆候を得た。

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  • Belle II実験への新型粒子識別検出器TOPカウンターの導入による新物理探索

    研究課題/領域番号:13J03438  2013年4月 - 2016年3月

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    佐藤 優太郎

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    配分額:3960000円 ( 直接経費:3300000円 、 間接経費:660000円 )

    昨年から引き続き、一般に公開されている理論計算プログラムコード”SuperIso” と自ら開発した統計処理のプログラムコードを用いて、標準理論を超えた新しい物理に対して、Belle II 実験の結果によってどれだけ探れるかを調べた。
    本年度ではとくに統計処理コードに改良を加え、実験観測量の間の誤差の相関と理論誤差をより適切に取り扱えるようにした。このことによって、標準理論からのずれの大きさをより正しく見積もることができるようになった。
    電弱ペンギン崩壊を用いたグローバルフィットに関する研究会を2016年11月に米国、Pacific Northwest National Laboratory にて開催した。わたしはSuperIso のチュートリアルの発表をし、他の理論計算プログラムコードである、EOS, HepFit, SusyFlavor の開発者と議論し、グループ間で意見交換できる関係を築くことに成功した。グループ間でコードにバグが無いかを相互に確認していくことで、フレーバー物理のための理論計算プログラムコードの開発が促進できると考えられる。
    グローバルフィットで使用してきた観測量の1 つであるB → D*τν 崩壊の崩壊分岐比をBelle のデータを用いて測定した。わたしが行った解析では従来の方法とは異なる手法を用いているため、過去の解析と同じデータを用いながら、統計的に独立にB → D*τν崩壊の崩壊分岐比を測定することができる。これまでの測定で標準理論からのずれが示唆されていたが、わたしの解析結果においても同様の傾向が見られている。この結果はコラボレータによってMoriond 2016 で初めて発表され、その後、わたしが物理学会において発表した。

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  • Belle実験 Υ(5S)におけるCP対称性の破れの角phi1の測定

    研究課題/領域番号:10J03308  2010年 - 2012年

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    佐藤 優太郎

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    配分額:2100000円 ( 直接経費:2100000円 )

    本研究ではBelle実験で集められたY(5S)モードのデータを用いて、従来の測定方法とは異なる方法でCP対称性の破れの角sin2phi1測定することを目指した。昨年度までで、最も有用な崩壊モードを用いて解析を行い、結果を論文(Physical Review Letter)にまとめることができた。そのため、今年度は、bクォークがレプトン対を伴いながらsクォークに崩壊する事象のレプトン前後非対称度を測定して、標準理論超える新しい物理を探索した。sクォークを18個の終状態から再構成を行い、その内、レプトン前後非対称度の測定のために10個の終状態を用いた。レプトン対は電子陽電子対もしくはミューオン対から再構成した。本研究では信号事象と背景事象の分離のためにニューラルネットワークを導入して、従来の尤度比を用いた方法に比べて、より効率的に分離することに成功した。
    レプトン前後非対称度の測定ために約300信号事象を得て、結果として、レプトン対の不変質量の2乗の小さい領域では標準理論の予言と1.8σで無矛盾な結果を得た。この結果は標準理論を超える物理を制限するのに使うことができる。
    途中までの解析結果は研究代表者本人によって物理学会(2012年秋季大会,2012/09/11@京都産業大学)で発表され、最終結果は研究代表者本人によって物理学会(第68回年次大会,2013/03/27@広島大学)で発表された。

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