COMET Phase-I technical design report

arXiv: Instrumentation and Detectors Pub Date : 2018-12-21 DOI:10.1093/ptep/ptz125

R. Abramishvili, G. Adamov, R. Akhmetshin, A. Allin, J. Ang'elique, V. Anishchik, M. Aoki, D. Aznabayev, I. Bagaturia, G. Ban, Y. Ban, D. Bauer, D. Baygarashev, A. Bondar, C. Cârloganu, B. Carniol, T. T. Chau, J. Chen, S. Chen, Y. Cheung, W. Silva, P. Dauncey, C. Densham, G. Devidze, P. Dornan, A. Drutskoy, V. Duginov, Y. Eguchi, L. Epshteyn, P. Evtoukhovich, S. Fayer, G. Fedotovich, M. Finger, Y. Fujii, Y. Fukao, J. Gabriel, E. Gillies, D. Grigoriev, K. Gritsay, V. H. Hải, E. Hamada, I. H. Hashim, S. Hashimoto, O. Hayashi, T. Hayashi, T. Hiasa, Z. A. Ibrahim, Y. Igarashi, F. Ignatov, M. Iio, K. Ishibashi, A. Issadykov, T. Itahashi, A. Jansen, X. Jiang, P. Jonsson, T. Kachelhoffer, V. Kalinnikov, E. Kaneva, F. Kapusta, H. Katayama, K. Kawagoe, Rei Kawashima, N. Kazak, V. Kazanin, O. Kemularia, A. Khvedelidze, M. Koike, T. Kormoll, G. Kozlov, A. Kozyrev, M. Kravchenko, B. Krikler, G. Kumsiashvili, Y. Kuno, Y. Kuriyama, Y. Kurochkin, A. Kurup, B. Lagrange, Jingliu Lai, M. Lee, H. Li, R. P. Litchfield, Wenzh

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引用次数: 133

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.

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COMET一期技术设计报告

本文介绍了彗星一期实验的技术设计。COMET是日本J-PARC的一个实验，它将在铝核场中寻找μ子到电子的中微子转换($\mu-e$转换，$\mu^- N$到e^- N$);一个轻子风味破坏过程。在第一阶段的实验中，该过程的实验灵敏度目标为$3.1\times10^{-15}$，即分支比的上限为$7\times 10^{-15}$的90%，比现有的上限提高了100倍。期望的后台事件数为0.032。为了达到目标灵敏度和背景水平，将使用来自J-PARC的3.2 kW 8 GeV质子束。CyDet和StrECAL两种类型的探测器将分别用于探测\mue转换事件和测量第二阶段实验中与光束相关的背景事件。对信号估计和背景估计的仿真结果也进行了描述。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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arXiv: Instrumentation and Detectors

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