COMET Phase-I technical design report
COMET Phase-I technical design report
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DOI：
10.1093/ptep/ptz125
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
R. Abramishvili;G. Adamov;R. Akhmetshin;A. Allin;J. Ang'elique;V. Anishchik;M. Aoki;D. Aznabayev-D.-Azn
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文献类型：
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作者：
R. Abramishvili;G. Adamov;R. Akhmetshin;A. Allin;J. Ang'elique;V. Anishchik;M. Aoki;D. Aznabayev-D.-Azn
本文介绍了彗星一期实验的技术设计。彗星是日本J-PARC的一项实验，它将探索在铝核场中介子到电子的无中微子转换($\mU-e$转换，$\mU^-N\to e^-N$)；一个轻子味破坏过程。在第一阶段实验中，这一过程的实验灵敏度目标是3.1美元\x 10^-15}$，或分支比$7\x 10^-15}$的90%上限，这是现有上限的100倍。预计后台事件数量为0.032个。为了达到目标灵敏度和本底水平，将使用J-PARC的3.2kW 8GeV质子束。两种类型的探测器，CyDet和StrECAL，将分别用于探测Mue转换事件和根据第二阶段实验测量与束流相关的背景事件。对信号和背景估计的模拟结果也进行了描述。
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.