Leptonic

Some articles on leptonic:

Properties - Leptonic Numbers
... The members of each generation's weak isospin doublet are assigned leptonic numbers that are conserved under the Standard Model ... The antileptons have their respective generation's leptonic numbers of −1 ... Conservation of the leptonic numbers means that the number of leptons of the same type remains the same, when particles interact ...
Basic Properties - Charged Pion Decays
... The primary decay mode of a pion, with probability 0.999877, is a purely leptonic decay into an anti-muon and a muon neutrino ... Besides the purely leptonic decays of pions, also observed have been some structure-dependent radiative leptonic decays (that is, decay to the usual leptons plus a gamma ray) ...