Conclusions

• Charged Lepton Flavour Violation is one of the most sensitive probes to physics beyond the Standard Model

• Muon-to-electron conversion offers a huge potential increase in sensitivity

• COMET is a next-generation muon-to-electron conversion experiment being built at J-PARC

• A staged construction scenario is being implemented, in which Phase-I allows us to study the novel pion production and muon transport system and make CLFV measurements

• The instrumentation concepts are fixed:

• StrECAL: straw-tracker and crystal ECAL for beam and background measurements
• CyDet: drift chamber and triggering hodoscope for CLFV measurements

• Design optimisations are ongoing