Full next-to-leading-order calculations of Higgs boson decay rates in models with non-minimal scalar sectors

Abstract

We present a complete set of decay rates of the Higgs boson with the mass of 125 GeV at the full next-to-leading order in a variety of extended Higgs models; i.e., a model with an additional real singlet scalar field, four types of two Higgs doublet models and the inert doublet model. All the one-loop contributions due to QCD and electroweak interactions as well as scalar interactions are taken into account, and the calculations are systematically performed. Branching ratios for all the decay modes are evaluated in these models, and patterns of deviations in each decay mode from the standard model predictions are comprehensively analyzed. We show how these models with extended Higgs sectors can be distinguished by using our calculation of the branching ratios and future precision measurements of the Higgs boson decays.

58 pages, 22 figures, 5 tables; version published in Nuclear Physics B. Minor changes, Fig. 18 is improved

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• One-loop QED and Weak Corrections to $\gamma \gamma \to H^{\pm }{H}^{\mp }$ in the Inert Doublet Model