The CP-conserving two-Higgs-doublet model: the approach to the decoupling limit
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A CP-even neutral Higgs boson with standard-model-like couplings may be the lightest scalar of a two-Higgs-doublet model. We study the decoupling limit of the most general CP-conserving two-Higgs-doublet model, where the mass of the lightest Higgs scalar is significantly smaller than the masses of the other Higgs bosons of the model. In this case, the properties of the lightest Higgs boson are nearly indistinguishable from those of the standard model Higgs boson. The first nontrivial corrections to Higgs boson couplings in the approach to the decoupling limit are also evaluated. The importance of detecting such deviations in precision Higgs boson measurements at future colliders is emphasized. We also clarify the case in which a neutral Higgs boson can possess standard-model-like couplings in a regime where the decoupling limit does not apply. The two-Higgs-doublet sector of the minimal supersymmetric model illustrates many of the above features.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/3fd14bd1973cf184bf22962abea9a03c6ab4de9c
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In Nuclear and High Energy Physics
- Atlas Collaboration
- Cms Collaboration
- Gudrun Heinrich
- Stefan Dittmaier
- Ansgar Denner
- Fabio Maltoni
- M. Schönherr
- M. Grazzini
Citations in the corpus
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- Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC (2014, neutral): “Models (2HDM) [132–140] of Type II or in the minimal supersymmetric extension of the SM (MSSM) [141–144].”
- ILC Higgs White Paper (2013, background): “However, in the limit of λ6 = λ7 = cos(β − α) = 0, the W+W−H coupling vanishes and the H+H−H coupling takes a particularly simple form, gH+H−H = 2(m(2)H −M2) cot 2β/v [68], which vanishes for the parameter choices employed in Figures 1.”
- Measurements of the Higgs boson production and decay rates and coupling strengths using pp collision data at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\o (2015, neutral): “This is for instance the case for certain TwoHiggs-Doublet Models (2HDM) [117–119].”
- The hunt for the rest of the Higgs bosons (2015, background): “In a given extended Higgs sector, this alignment limit may be approached either due to decoupling of additional Higgs states [16, 17], or simply due to the organization of dimensionless couplings in the Higgs potential [13– 15, 18–20].”
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- Simplified dark matter models with two Higgs doublets: I. Pseudoscalar mediators (2017, background): “Perturbativity [74, 75] and unitarity [76–79] also put restrictions on the scalar masses and the magnitudes and signs of the quartic couplings.”
- Limiting two-Higgs-doublet models (2014, methodology): “For example, the vacuum stability condition requires [5]:”