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@inbook{doi:10.7566/JPSCP.8.025009,

title = {Development of a Cerenkov Trigger Detector for the COMET Experiment},
booktitle = {Proceedings of the 2nd International Symposium on Science at J-PARC — Unlocking the Mysteries of Life, Matter and the Universe —},
chapter = {},
pages = {},
doi = {10.7566/JPSCP.8.025009},
URL = {https://journals.jps.jp/doi/abs/10.7566/JPSCP.8.025009},
eprint = {https://journals.jps.jp/doi/pdf/10.7566/JPSCP.8.025009},
    abstract = { Theoretical models beyond the Standard Models predict that a branching ratio of the muon-to-electron (µ–e) conversion increases to about 10−15, although the Standard Model contribution restricts it to be less than 10−54. The COMET experiment searches for the µ–e conversion with signal event sensitivity of 10−15 in the first phase (Phase-I). A cylindrical detector consisting of a cylindrical drift chamber and a trigger detector will be used for detecting signal electrons. We designed the CDC trigger detector for the COMET Phase-I, and constructed a 1st prototype. Using cosmic rays, we studied the performance of the prototype. A signal to noise ratio (S/N) of 16.9 ± 0.5 was measured. To improve S/N, we started construction of a 2nd prototype. }
}