학술논문
COMET Phase-I Technical Design Report
Document Type
Working Paper
Author
The COMET Collaboration; Abramishvili, R.; Adamov, G.; Akhmetshin, R. R.; Allin, A.; Angélique, J. C.; Anishchik, V.; Aoki, M.; Aznabayev, D.; Bagaturia, I.; Ban, G.; Ban, Y.; Bauer, D.; Baygarashev, D.; Bondar, A. E.; Cârloganu, C.; Carniol, B.; Chau, T. T.; Chen, J. K.; Chen, S. J.; Cheung, Y. E.; da Silva, W.; Dauncey, P. D.; Densham, C.; Devidze, G.; Dornan, P.; Drutskoy, A.; Duginov, V.; Eguchi, Y.; Epshteyn, L. B.; Evtoukhovich, P.; Fayer, S.; Fedotovich, G. V.; Finger Jr, M.; Finger, M.; Fujii, Y.; Fukao, Y.; Gabriel, J. L.; Gay, P.; Gillies, E.; Grigoriev, D. N.; Gritsay, K.; Hai, V. H.; Hamada, E.; Hashim, I. H.; Hashimoto, S.; Hayashi, O.; Hayashi, T.; Hiasa, T.; Ibrahim, Z. A.; Igarashi, Y.; Ignatov, F. V.; Iio, M.; Ishibashi, K.; Issadykov, A.; Itahashi, T.; Jansen, A.; Jiang, X. S.; Jonsson, P.; Kachelhoffer, T.; Kalinnikov, V.; Kaneva, E.; Kapusta, F.; Katayama, H.; Kawagoe, K.; Kawashima, R.; Kazak, N.; Kazanin, V. F.; Kemularia, O.; Khvedelidze, A.; Koike, M.; Kormoll, T.; Kozlov, G. A.; Kozyrev, A. N.; Kravchenko, M.; Krikler, B.; Kumsiashvili, G.; Kuno, Y.; Kuriyama, Y.; Kurochkin, Y.; Kurup, A.; Lagrange, B.; Lai, J.; Lee, M. J.; Li, H. B.; Litchfield, R. P.; Li, W. G.; Loan, T.; Lomidze, D.; Lomidze, I.; Loveridge, P.; Macharashvili, G.; Makida, Y.; Mao, Y. J.; Markin, O.; Matsuda, Y.; Melkadze, A.; Melnik, A.; Mibe, T.; Mihara, S.; Miyamoto, N.; Miyazaki, Y.; Idris, F. Mohamad; Azmi, K. A. Mohamed Kamal; Moiseenko, A.; Moritsu, M.; Mori, Y.; Motoishi, T.; Nakai, H.; Nakai, Y.; Nakamoto, T.; Nakamura, Y.; Nakatsugawa, Y.; Nakazawa, Y.; Nash, J.; Natori, H.; Niess, V.; Nioradze, M.; Nishiguchi, H.; Noguchi, K.; Numao, T.; O'Dell, J.; Ogitsu, T.; Ohta, S.; Oishi, K.; Okamoto, K.; Okamura, T.; Okinaka, K.; Omori, C.; Ota, T.; Pasternak, J.; Paulau, A.; Picters, D.; Ponariadov, V.; Quémener, G.; Ruban, A. A.; Rusinov, V.; Sabirov, B.; Sakamoto, H.; Sarin, P.; Sasaki, K.; Sato, A.; Sato, J.; Semertzidis, Y. K.; Shigyo, N.; Shoukavy, Dz.; Slunecka, M.; Stöckinger, D.; Sugano, M.; Tachimoto, T.; Takayanagi, T.; Tanaka, M.; Tang, J.; Tao, C. V.; Teixeira, A. M.; Tevzadze, Y.; Thanh, T.; Tojo, J.; Tolmachev, S. S.; Tomasek, M.; Tomizawa, M.; Toriashvili, T.; Trang, H.; Trekov, I.; Tsamalaidze, Z.; Tsverava, N.; Uchida, T.; Uchida, Y.; Ueno, K.; Velicheva, E.; Volkov, A.; Vrba, V.; Abdullah, W. A. T. Wan; Warin-Charpentier, P.; Wong, M. L.; Wong, T. S.; Wu, C.; Xing, T. Y.; Yamaguchi, H.; Yamamoto, A.; Yamanaka, M.; Yamane, T.; Yang, Y.; Yano, T.; Yao, W. C.; Yeo, B.; Yoshida, H.; Yoshida, M.; Yoshioka, T.; Yuan, Y.; Yudin, Yu. V.; Zdorovets, M. V.; Zhang, J.; Zhang, Y.; Zuber, K.
Source
Progress of Theoretical and Experimental Physics, Volume 2020, Issue 3, March 2020, 033C01
Subject
Language
Abstract
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.
Comment: A minor correction applied in Eq. 3
Comment: A minor correction applied in Eq. 3