The model-discriminating power of lepton flavor violating τ decays

Within an effective field theory framework, we discuss the possibility to discriminate among different operators that contribute to lepton flavor violating (LFV) τ decays. Correlations among decay rates in different channels are shown to provide a basic handle to unravel the origin of LFV in these processes. More information about the underlying dynamics responsible for LFV can be gathered from differential distri-butions in three-body decays like τ → µpipi or τ → 3µ: these are considered in some detail. We incorporate in our analysis recent developments in the determination of the hadronic form factors for τ → µpipi. Future prospects for the observation of LFV τ decays and its interpretation are also discussed