COMET Phase-I technical design report

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

Research output: Contribution to journalArticle

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 (μ-e conversion, μ-N → e-N); a lepton flavor-violating process. The experimental sensitivity goal for this process in the Phase-I experiment is 3.1 × 10-15, or 90% upper limit of a branching ratio of 7 × 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 μ-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.

Original languageEnglish
Article number033C01
JournalProgress of Theoretical and Experimental Physics
Volume2020
Issue number3
DOIs
Publication statusPublished - Mar 13 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    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., ... Zuber, K. (2020). COMET Phase-I technical design report. Progress of Theoretical and Experimental Physics, 2020(3), [033C01]. https://doi.org/10.1093/ptep/ptz125