Higgs mediated lepton flavor violating tau decays $\tau \to \mu \gamma$ and $\tau \to \mu \gamma \gamma$ in effective theories

Abstract

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.

6 pages, 3 figures

References in corpus (3)

• Lepton masses, mixings and FCNC in a minimal S_3-invariant extension of the Standard Model
• Rare three-body decay t -> c h gamma in the standard model and the two-Higgs doublet model
• Double Flavor Violating Top Quark Decays in Effective Theories