Higgs boson couplings in multi-doublet models with natural flavour conservation

Abstract

We investigate the deviation in the couplings of the standard model (SM) like Higgs boson ($h$) with a mass of 125 GeV from the prediction of the SM in multi-doublet models within the framework where flavour changing neutral currents at the tree level are naturally forbidden. After we present the general expressions for the modified gauge and Yukawa couplings for $h$, we show the correlation between the deviation in the Yukawa coupling for the tau lepton $h{\tau }^{+}{\tau }^{-}$ and that for the bottom quark $hb\bar{b}$ under the assumption of a non-zero deviation in the $hVV$ $(V=W,Z)$ couplings in two Higgs doublet models (2HDMs) and three Higgs doublet models (3HDMs) as simple examples. We clarify the possible allowed prediction of the deviations in the 3HDMs which cannot be explained in the 2HDMs even taking into account the one-loop electroweak corrections to the Yukawa coupling.

arXiv commentVersion accepted in PLB

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Cited by in corpus (12)

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• Unitarity bounds for all symmetry-constrained 3HDMs
• Maximally Symmetric Three Higgs Doublet Model
• Current bounds on the Type-Z $Z_3$ three Higgs doublet model
• BFB conditions on a class of symmetry constrained 3HDM
• Anomaly-free axion dark matter in three Higgs doublet model and its phenomenological implications
• A viable $A_4$ 3HDM theory of quark mass matrices
• Fingerprinting the Type-Z three Higgs doublet models
• A Three Doublet Lepton-Specific Model
• Loop induced $h\to \gamma \gamma ,Z\gamma ,gg$ decays in 3-Higgs doublet models
• Limiting FCNC induced by a CP symmetry of order 4
• Scalar and gauge sectors in the 3-Higgs Doublet Model under the S3-symmetry