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Probing lepton flavour violation with Higgs boson decays H-> li+lj

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arxiv hep-ph/9910233 v2 pith:LRA3A4MI submitted 1999-10-05 hep-ph

classification hep-ph
keywords higgsdecaysorderbosonsboundscaseeffectiveflavour
verification ladder T0 review T1 audit T2 compute T3 formal

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We evaluate the lepton flavour violating (LFV) decays of HIggs bosons H->li+lj in several extensions of the SM, including both the effective lagrangian approach and several specific models. For the effective lagrangian case, we focus on dimension-six operators that induce LFV vertices for the Higgs and or Z bosons. For those operators whose coefficients can not be constrained by present data, LFV Higgs decays can have a B.R. of order 0.1-0.01. Those cases when current bounds apply, induce strong bounds for e-mu transitions, and the b.r. for H->e mu is of order 10^-9; however H->tau mu, tau e, can have B.R. of order 0.1. In the case of the two-higgs doublet model III, we obtain a similar B.R. for H-> tau mu, tau e, whereas in the SM with massive neutrinos and the minimal SUSY-SM the corresponding B.R. are very suppressed.

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  1. Higgs lepton flavor violating decays in Two Higgs Doublet Models

    hep-ph 2019-08 conditional novelty 1.0 of 10

    A mini-review explaining that the type-III two Higgs doublet model can produce h to tau mu branching ratios near the present CMS bound while remaining compatible with tau to mu gamma and related flavor constraints.

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