OUP accepted manuscript

2019 Progress of Theoretical and Experimental Physics  
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 (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 branching ratio of 7 × 10 −15 , which is a factor of 100 improvement over the
more » ... ng 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.
doi:10.1093/ptep/ptz125 fatcat:jajort2e3fhurlgtxgfcyxkjfe