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Lepton flavor violating Higgs bosons and tau to mu gamma

Abstract : We update phenomenological constraints on a Two Higgs Doublet Model with lepton flavour non-conserving Yukawa couplings. Bounds arise from the rare decay $\tau \to \mu \gamma$, and the neutral scalars $\phi$ could be searched for at hadron colliders in $ \phi \to \tau \bar{\mu}$. We emphasize the similarity between the diagrams for the collider process, and the two-loop ``Barr-Zee'' diagrams which contribute to $\tau \to \mu \gamma$. We find that a collider cross-section of order the Standard Model expectation for $\sigma (gg \to h_{SM} \to \tau^+ \tau^-)$ is consistent with the current bound from $\tau \to \mu \gamma$.
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http://hal.in2p3.fr/in2p3-00444082
Contributor : Sylvie Flores <>
Submitted on : Tuesday, January 5, 2010 - 4:06:57 PM
Last modification on : Tuesday, November 19, 2019 - 2:37:42 AM

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S. Davidson, G. Grenier. Lepton flavor violating Higgs bosons and tau to mu gamma. Physical Review D, American Physical Society, 2010, 81, pp.095016. ⟨10.1103/PhysRevD.81.095016⟩. ⟨in2p3-00444082⟩

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