Speaker
Description
In this talk, I will present the prospect of lepton-flavor-violating (LFV) interactions of dark matter (DM) within an effective field theory framework, going beyond the conventional flavor-conserving paradigm. Considering scalar, fermion, and vector DM candidates, I study the three-body decays of charged leptons into a lighter lepton and a pair of DM particles. The invariant-mass distributions are shown to provide a useful handle to distinguish operator structures and probe the DM mass. Using current experimental bounds on LFV processes and leptonic decay measurements, I derive constraints on the effective interaction scales. For the electron–muon sector, radiative four-body decays are also examined as complementary probes. Finally, I analyze invisible muonium decays and find that their rates can be significantly enhanced, offering a promising signature for flavored DM in future experiments.