CP-conserving two-Higgs-doublet model: The approach to the decoupling limit

2002/07/31 by John F. Gunion, Howard E. Haber · 892 citations
Engineering · Mathematics · Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Decoupling (probability) #Engineering #Higgs boson #Limit (mathematics) #Mathematical analysis #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #hep-ph

paper · pdf · doi:10.1103/physrevd.67.075019

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 67(7) (American Physical Society) · 54 pages, 2 tables, revtex4 format, some new material added (including elegant forms for the three-Higgs and four-Higgs couplings) and typographical errors fixed

arxiv created 2003/01/29 · openalex publication_date 2003/04/25 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

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.

Citations

• Lee-Quigg-Thacker bounds for Higgs boson masses in a two-doublet model
• Supersymmetric QCD corrections to the top quark decay of a heavy charged Higgs boson
• QCD corrections to the decay H → t in the minimal supersymmetric standard model
• Renormalization of two-Higgs-doublet models
• Large Mass Hierarchy from a Small Extra Dimension
• Feynman rules in the type-III natural flavor-conserving two-Higgs-doublet model
• The Hierarchy Problem and New Dimensions at a Millimeter
• Infrared singularities and massive fields
• Experimental signatures of fermiophobic Higgs bosons
• Effective Lagrangian of the two Higgs doublet model

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• Possible non-decoupling effects of heavy Higgs bosons in e^ + e^- → W^ + W^- within THDM
• Natural Standard Model Alignment in the Two Higgs Doublet Model