COMET Phase-I technical design report
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.
- Publication:
-
Progress of Theoretical and Experimental Physics
- Pub Date:
- March 2020
- DOI:
- 10.1093/ptep/ptz125
- arXiv:
- arXiv:1812.09018
- Bibcode:
- 2020PTEP.2020c3C01C
- Keywords:
-
- Physics - Instrumentation and Detectors;
- High Energy Physics - Experiment
- E-Print:
- A minor correction applied in Eq. 3