COMET Detectors to Search for a Muon to Electron Conversion

Abstract

The COMET experiment at J-PARC aims to search for the neutrino-less muon to electron conversion in muonic atoms (µ − N → e − N). In the Standard Model of particle physics, a conversion rate of µ − N → e − N is negligibly small while many new physics models beyond the Standard Model imply it to be detectable. Therefore the µ − N → e − N conversion is highly sensitive to the new physics. The goal sensitivities of COMET are 3 × 10 −15 and 3 × 10 −17 in two different stages. To achieve these goals, the performance of each detector is essential to suppress the backgrounds. This paper describes the details of each detector component where we adopted novel detection techniques to fulfil the aims of COMET.