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COMET Phase-I technical design report

2019; University of Oxford; Volume: 2020; Issue: 3 Linguagem: Inglês

10.1093/ptep/ptz125

2050-3911

R Abramishvili, G. Adamov, R.R. Akhmetshin, A. E. Allin, J. C. Angélique, V.M. Anishchik, M. Aoki, D. Aznabayev, I. Bagaturia, G. Ban, Y. Ban, D. Bauer, D Baygarashev, A. Bondar, C. Cârloganu, B Carniol, Thien Nhan Chau, Jiankang Chen, S. J. Chen, Yeuk-Kwan E. Cheung, W da Silva, P. Dauncey, C. Densham, G. G. Devidze, P. Dornan, A. Drutskoy, V. N. Duginov, Yuto Eguchi, L.B. Epshteyn, P. Evtoukhovitch, Simon Fayer, G.V. Fedotovich, M. Finger, M. Finger, Yuki Fujii, Y. Fukao, J L Gabriel, P. Gay, Ewen Gillies, D.N. Grigoriev, K. Gritsay, Vo Hong Hai, Eitaro Hamada, I. H. Hashim, Shotaro Hashimoto, O Hayashi, Tatsuya Hayashi, Tokyo Hiasa, Z. A. Ibrahim, Y. Igarashi, F.V. Ignatov, Iio M, Kenji Ishibashi, Аidos Issadykov, T. Itahashi, A Jansen, X. S. Jiang, P. Jonsson, T. Kachelhoffer, V. A. Kalinnikov, Екатерина Канева, F. Kapusta, Hiroshi Katayama, K. Kawagoe, Ryosuke Kawashima, Н. С. Казак, V. F. Kazanin, O. Kemularia, A. Khvedelidze, Masafumi Koike, T. Kormoll, Г. А. Козлов, A. Kozyrev, Mikhail Kravchenko, B. Krikler, G Kumsiashvili, Y. Kuno, Y. Kuriyama, Y. A. Kurochkin, A. Kurup, B Lagrange, Juey H. Lai, M. J. Lee, H B Li, R. P. Litchfield, W G Li, Trương Thị Hồng Loan, D. Lomidze, I. Lomidze, P. Loveridge, G. Macharashvili, Y. Makida, Y. J. Mao, Oleg Markin, Y. Matsuda, A Melkadze, Anastasiya Melnik, T. Mibe, S. Mihara, N. Miyamoto, Y. Miyazaki, F. Mohamad Idris, K. Azmi, A. Moiseenko, Manabu Moritsu, Y. Mori, Takahiro Motoishi, Hideyuki Nakai, Yuki Nakai, T. Nakamoto, Yuto Nakamura, Y. Nakatsugawa, Y. Nakazawa, J. Nash, H. Natori, V. Niess, M. Nioradze, H. Nishiguchi, K Noguchi, T. Numao, J. O’Dell, T. Ogitsu, Saki Ohta, Kou Oishi, Kazuaki Okamoto, T. Okamura, Kaori Okinaka, Chihiro Omori, Toshihiko Ota, J. Pasternak, A Paulau, D Picters, В. В. Понарядов, G. Qúeḿener, A.A. Ruban, V. Rusinov, B. Sabirov, H. Sakamoto, P. Sarin, K. Sasaki, Akira Sato, Joe Sato, Yannis K. Semertzidis, Nobuhiro Shigyo, D. V. Shoukavy, M. Slunečka, Dominik Stöckinger, M. Sugano, T. Tachimoto, T. Takayanagi, M. Tanaka, J. Tang, C. Tao, Ana M. Teixeira, Yu.V. Tevzadze, Trần Thiện Thanh, J. Tojo, S. S. Tolmachev, M. Tomášek, M. Tomizawa, T. Toriashvili, Ha Thi Thu Trang, I. Trekov, Z. Tsamalaidze, N. Tsverava, T. Uchida, Y. Uchida, K. Ueno, E. P. Velicheva, A.D. Volkov, V. Vrba, Wan Ahmad Tajuddin Wan Abdullah, P. Warin-Charpentier, Ming-Liang Wong, TingSam Wong, Chen Wu, T. Y. Xing, Hiroshi Yamaguchi, A. Yamamoto, Masato Yamanaka, Teiichi Yamane, Ye Yang, T. Yano, W. Yao, B. K. Yeo, Hisataka Yoshida, Makoto Yoshida, T. Yoshioka, Y. Yuan, Yu. V. Yudin, Maxim V. Zdorovets, Jiawen Zhang, Yuan Zhang, Κ. Zuber,

Astrophysics and Cosmic Phenomena

The Technical Design for the COMET Phase-I experiment is presented in this paper. COMET is an experiment at J-PARC, Japan, which will search for neutrinoless conversion of muons into electrons in the field of an aluminium nucleus ($\mu-e$ conversion, $\mu^- N \to e^- N$); a lepton flavor violating process. The experimental sensitivity goal for this process in the Phase-I experiment is $3.1\times10^{-15}$, or 90 % upper limit of branching ratio of $7\times 10^{-15}$, which is a factor of 100 improvement over the existing limit. The expected number of background events is 0.032. To achieve the target sensitivity and background level, the 3.2 kW 8 GeV proton beam from J-PARC will be used. Two types of detectors, CyDet and StrECAL, will be used for detecting the \mue conversion events, and for measuring the beam-related background events in view of the Phase-II experiment, respectively. Results from simulation on signal and background estimations are also described.