Lepton-flavor-violating decays ofZ0andτ

We examine a class of extended electroweak models in which lepton flavors are violated due to neutral gauge bosons which do not couple universally to the fermion generations. It is shown that the decays $Z^0$→τμ and τ→μ+(μμ¯,${\pi }^0$,. . .) can occur with sizable branching ratios (∼${10}^{\mathrm{-}7}$). Relations amongst these decay modes are also obtained.