Phenomenological structure of the weak lepton currents in the reactions of direct and inverse μ-decay

The muon decay μ→eνν ̅and the inverse process ν$_{μ}$e$^{-}$→ν$_{e}$ μ ν$^{-}$ is investigated in the case of the interaction of charged and nondiagonal neutral lepton currents of general form. It is shown how the structure of the interaction may be established using experimental data on these processes. On the basis of the known values of the μ-deсay parameters, bounds on the coupling constants of the currents are obtained.