Effects of non-standard couplings, radiative corrections and neutrino masses on the lepton spectrum in $\mu$ and $\tau$ decays

C. Greub, W. Fetscher, D. Wyler

We investigate the combined effect of neutrino masses and non-standard couplings on the various lepton spectra in $\mu$ and $\tau$ decays. We emphasize the energy spectra of the neutrin…