Constraining parameter space in type-II two-Higgs doublet model in light of a 126 GeV Higgs boson
arXiv:1207.1083 · doi:10.1007/JHEP09(2013)085
Abstract
We explore the implications of a 126 GeV Higgs boson indicated by the recent LHC results for two-Higgs doublet model (2HDM). Identifying the 126 GeV Higgs boson as either the lighter or heavier of CP even neutral Higgs bosons in 2HDM, we examine how the masses of Higgs fields and mixing parameters can be constrained by the theoretical conditions and experimental constraints. The theoretical conditions taken into account are the vacuum stability, perturbativity and unitarity required to be satisfied up to a cut-off scale. We also show how bounds on the masses of Higgs bosons and mixing parameters depend on the cut-off scale. In addition, we investigate whether the allowed regions of parameter space can accommodate particularly the enhanced di-photon signals, ZZ* and WW* decay modes of the Higgs boson, and examine the prediction of the signal strength of Zγ decay mode for the allowed regions of the parameter space.
arXiv commentTo be published in JHEP, 20 pages, 11 figures, Figures and results are updated for the recent LHC results
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