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COMET Phase-I technical design report
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DOI：10.1093/ptep/ptz125.png)
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摘要
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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 -> e(-) N); a lepton flavor- violating process. The experimental sensitivity goal for this process in the Phase-I experiment is 3.1 x 10(-15), or 90% upper limit of a branching ratio of 7 x 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.
Keyword:
LEPTON-FLAVOR VIOLATION
DOUBLE-BETA-DECAY
NEUTRINO MASSES
MUON
CONVERSION
RADIATION
DETECTOR
SCINTILLATOR
CONSTRAINTS
SIMULATION
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