COMET Phase-I technical design report. (13th March 2020)

• Record Type: Journal Article
• Authors: 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; Evtoukhovitch, 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; Mohamad Idris, F; 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;
• Is Part Of: Progress of theoretical and experimental physics. Volume 2020:Number 3(2020)
• Publication Date: 2020-03-13
• Subjects: C01 -- C08 -- C30 -- H10 -- H50; Physics -- Periodicals; Mathematical physics -- Periodicals; 530.05
• DOI: 10.1093/ptep/ptz125
• Languages: English
• ISSNs: 2050-3911

Abstract

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 aluminum nucleus ($\mu$ –$e$ conversion, $\mu^{-}N \rightarrow e^{-}N$ ); 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 a 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 $\mu$ –$e$ 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.