Higgs mediated lepton flavor violating tau decays $\tau \to \mu \gamma$   and $\tau \to \mu \gamma \gamma$ in effective theories
  The size of the branching ratios for the $\tau \to \mu \gamma$ and $\tau \to \mu \gamma \gamma$ decays induced by a lepton flavor violating Higgs interaction $H\tau \mu$ is studied in the frame of effective field theories. The best constraint on the $H\tau \mu$ vertex, derived from the know measurement on the muon anomalous magnetic moment, is used to impose the upper bounds $Br(\tau \to \mu \gamma)<2.5\times 10^{-10}$ and $Br(\tau \to \mu \gamma \gamma)<2.3\times 10^{-12}$, which are more stringent than current experimental limits on this class of transitions. 
J. I. Aranda (1), F. Ram\'irez--Zavaleta (2), J. J. Toscano (2 and 3),   E. S. Tututi (1) ((1) FCFM-Umsnh, (2) FCFM-Uap, (3)...