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.

arXiv comment6 pages, 3 figures

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• Modified Higgs branching ratios versus CP and lepton flavor violation
• Lepton flavor violating $Z$-boson couplings from non-standard Higgs interactions
• Lepton flavor violating Higgs boson decay $h\to \mu \tau$ at the ILC
• Flavor violation in chromo- and electromagnetic dipole moments induced by $Z^{\prime }$ gauge bosons and a brief revisit of the Standard Model
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• Implications of Lorentz violation on Higgs-mediated lepton flavor violation
• Higgs mediated Double Flavor Violating top decays in Effective Theories
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• Lepton Flavor Violation from diphoton effective interactions
• Bounding the B_s -> gamma gamma decay from Higgs mediated FCNC transitions