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Probing lepton flavour violation with Higgs boson decays H-> li+lj
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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.
Forward citations
Cited by 2 Pith papers
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Improved Bounds and Global Fit of Flavor-Violating Charged Lepton Yukawa Couplings post LHC
Updated constraints show LHC direct searches now dominate the tau-mu and tau-e flavor-violating Higgs couplings, with new-physics scales around 10 to 100 TeV.
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Higgs lepton flavor violating decays in Two Higgs Doublet Models
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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