Limiting two-Higgs-doublet models

doi:10.1007/JHEP11(2014)058

2014-11-12

122

DOI：10.1007/JHEP11(2014)058

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摘要

En 中文

We update the constraints on two-Higgs-doublet models (2HDMs) focusing on the parameter space relevant to explain the present muon g - 2 anomaly, Delta alpha(mu), in four different types of models, type I, II, lepton specific (or X) and flipped (or Y). We show that the strong constraints provided by the electroweak precision data on the mass of the pseudoscalar Higgs, whose contribution may account for Delta alpha(mu), are evaded in regions where the charged scalar is degenerate with the heavy neutral one and the mixing angles alpha and beta satisfy the Standard Model limit beta - alpha approximate to pi/2. We combine theoretical constraints from vacuum stability and perturbativity with direct and indirect bounds arising from collider and B physics. Possible future constraints from the electron g - 2 are also considered. If the 126 GeV resonance discovered at the LHC is interpreted as the light CP-even Higgs boson of the 2HDM, we find that only models of type X can satisfy all the considered theoretical and experimental constraints.

Keyword:

Higgs Physics

Beyond Standard Model

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期刊

Journal of High Energy Physics

IF:

5.5

论文数:

4.0W

被引数:

13.7W

机构

istituto nazionale di fisica nucleare (infn)

学者数:

3.0W

论文数: 1.2W

被引数: 14

swiss federal institutes of technology domain

学者数:

9.0W

论文数: 8.0W

被引数: 163

Paul Scherrer Institute

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6.9K

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