Constraints and implications on Higgs FCNC couplings from precision measurement of Bs→μ+μ− decay

We study constraints and implications of the recent LHCb measurement of B(Bs→μ+μ−) for tree-level Higgs-mediated flavor-changing neutral current (FCNC) interactions. Combined with experimental data on the Bs mass difference Δms and the h→μτ and h→τ+τ− decay branching ratios from the LHC, we find tha...

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Bibliographic Details
Published in:Physical review. D 2017-08, Vol.96 (3)
Main Authors: Chiang, Cheng-Wei, He, Xiao-Gang, Ye, Fang, Yuan, Xing-Bo
Format: Article
Language:English
Subjects:
Couplings
CP violation
Decay
Neutral currents
Online Access:Get full text
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Summary:We study constraints and implications of the recent LHCb measurement of B(Bs→μ+μ−) for tree-level Higgs-mediated flavor-changing neutral current (FCNC) interactions. Combined with experimental data on the Bs mass difference Δms and the h→μτ and h→τ+τ− decay branching ratios from the LHC, we find that the Higgs FCNC couplings are severely constrained. The allowed regions for Bs→μτ, ττ and h→sb decays are obtained. Current data allow large CP violation in the h→τ+τ− decay. Consequences of the Cheng-Sher ansatz for the Higgs-Yukawa couplings are discussed in some detail.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.96.035032