Lepton Flavor Violation at muon-electron colliders

Abstract

Lepton Flavor Violating (LFV) processes are clear signals of physics beyond the Standard Model. We investigate the possibility of measuring this kind of processes at present and foreseeable future muon-electron colliders, taking into account present day bounds from existing experiments. As a model of new physics we consider a Z' boson with a $U^{\prime }(1)$ gauge symmetry and generic couplings. Processes that violate lepton flavor by two units seem to be particularly promising.

Comments: 9 pages, 4 figures. Final version published on JHEP