Charged-lepton flavor violation
= Charged-lepton flavor violation
= Charged-lepton flavour violation
{synonym}
Processes that change individual charged-lepton family numbers are absent perturbatively in the minimal massless-neutrino <Standard Model>. A flavour-misaligned Higgs coupling can permit decays such as $h\to\mu\tau$. Neutrino masses and mixing permit extremely suppressed loop effects, while additional flavour structures can give larger rates.