Abstract

The muon whose discovery in 1937 caused a furore at the time is about to have a renaissance. The availability of new high intensity proton sources at PSI, J-PARC and FNAL will allow the muon's decay modes and dipole moment to be probed to an unprecedented precision. Lepton violation measurements can probe physics far beyond the LHC energy scale and elucidate and resolve degeneracy in new physics models potentially exposed by the LHC. Similarly dipole moment measurements have a sensitivity to TeV-scale physics that may be difficult to expose at the LHC and can also probe physics e.g. dark photons, not accessible at the LHC. In conjunction with measurements of neutrinoless double beta decay and neutrino oscillations, the muon measurements can also shed light on the mechanism that has generated the universe's matter anti-matter asymmetry. In this talk I will discuss the motivation for, and describe, the next generation of muon experiments and particularly those that the UK has or is seeking an involvement in i.e. COMET and FNAL g-2.