Scrutinizing the alignment limit in two-Higgs-doublet models. II. mH=125 GeV

被引：93

作者：

Bernon, Jeremy ^{[1
]}

Gunion, John F. ^{[2
]}

Haber, Howard E. ^{[3
]}

Jiang, Yun ^{[2
,4
,5
]}

Kraml, Sabine ^{[1
]}

机构：

[1] Univ Grenoble Alpes, CNRS IN2P3, Lab Phys Subat & Cosmol, 53 Ave Martyrs, F-38026 Grenoble, France

[2] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[3] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA

[4] Univ Copenhagen, Niels Bohr Inst, NBIA, Blegdamsvej 17, DK-2100 Copenhagen, Denmark

[5] Univ Copenhagen, Niels Bohr Inst, Discovery Ctr, Blegdamsvej 17, DK-2100 Copenhagen, Denmark

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 03期

基金：

美国国家科学基金会;

关键词：

TREE-LEVEL UNITARITY; HIGGS-BOSON MASSES; STANDARD MODEL; BOUNDS; COLLISIONS;

D O I：

10.1103/PhysRevD.93.035027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In the alignment limit of a multidoublet Higgs sector, one of the Higgs mass eigenstates aligns in field space with the direction of the scalar field vacuum expectation values, and its couplings approach those of the Standard Model (SM) Higgs boson. We consider CP-conserving two-Higgs-doublet models (2HDMs) of type I and type II near the alignment limit in which the heavier of the two CP-even Higgs bosons, H, is the SM-like state observed with a mass of 125 GeV, and the couplings of H to gauge bosons approach those of the SM. We review the theoretical structure and analyze the phenomenological implications of this particular realization of the alignment limit, where decoupling of the extra states cannot occur given that the lighter CP-even state h must, by definition, have a mass below 125 GeV. For the numerical analysis, we perform scans of the 2HDM parameter space employing the software packages 2HDMC and Lilith, taking into account all relevant pre-LHC constraints, constraints from the measurements of the 125 GeV Higgs signal at the LHC, as well as the most recent limits coming from searches for other Higgs-like states. Implications for Run 2 at the LHC, including expectations for observing the other scalar states, are also discussed.

引用

页数：29

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