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Title: Higgs boson signatures of MSSM electroweak baryogenesis

Abstract

Electroweak baryogenesis in the minimal supersymmetric standard model can account for the cosmological baryon asymmetry, but only within a restricted region of the parameter space. In particular, minimal supersymmetric standard model electroweak baryogenesis requires a mostly right-handed stop that is lighter than the top quark and a standard model-like light Higgs boson. In the present work we investigate the effects of the light stop on Higgs boson production and decay. Relative to the standard model Higgs boson, we find a large enhancement of the Higgs production rate through gluon fusion and a suppression of the Higgs branching fraction into photon pairs. These modifications in the properties of the Higgs boson are directly related to the effect of the light stop on the electroweak phase transition, and are large enough that they can potentially be tested at the Tevatron and the LHC.

Authors:
 [1];  [2]
  1. Michigan Center for Theoretical Physics (MCTP) Physics Department, University of Michigan, Ann Arbor, Michigan 48109 (United States)
  2. Jefferson Physical Laboratory, Harvard University, Cambridge, Massachusetts 02138 (United States)
Publication Date:
OSTI Identifier:
21300892
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 79; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.79.115020; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BARYONS; BRANCHING RATIO; CERN LHC; FERMILAB TEVATRON; GLUONS; HIGGS BOSONS; HIGGS MODEL; MODIFICATIONS; PARTICLE DECAY; PARTICLE PRODUCTION; PHASE TRANSFORMATIONS; PHOTONS; SPACE; STANDARD MODEL; SUPERSYMMETRY; T QUARKS; WEINBERG-SALAM GAUGE MODEL

Citation Formats

Menon, Arjun, and Morrissey, David E. Higgs boson signatures of MSSM electroweak baryogenesis. United States: N. p., 2009. Web. doi:10.1103/PHYSREVD.79.115020.
Menon, Arjun, & Morrissey, David E. Higgs boson signatures of MSSM electroweak baryogenesis. United States. https://doi.org/10.1103/PHYSREVD.79.115020
Menon, Arjun, and Morrissey, David E. Mon . "Higgs boson signatures of MSSM electroweak baryogenesis". United States. https://doi.org/10.1103/PHYSREVD.79.115020.
@article{osti_21300892,
title = {Higgs boson signatures of MSSM electroweak baryogenesis},
author = {Menon, Arjun and Morrissey, David E},
abstractNote = {Electroweak baryogenesis in the minimal supersymmetric standard model can account for the cosmological baryon asymmetry, but only within a restricted region of the parameter space. In particular, minimal supersymmetric standard model electroweak baryogenesis requires a mostly right-handed stop that is lighter than the top quark and a standard model-like light Higgs boson. In the present work we investigate the effects of the light stop on Higgs boson production and decay. Relative to the standard model Higgs boson, we find a large enhancement of the Higgs production rate through gluon fusion and a suppression of the Higgs branching fraction into photon pairs. These modifications in the properties of the Higgs boson are directly related to the effect of the light stop on the electroweak phase transition, and are large enough that they can potentially be tested at the Tevatron and the LHC.},
doi = {10.1103/PHYSREVD.79.115020},
url = {https://www.osti.gov/biblio/21300892}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 79,
place = {United States},
year = {2009},
month = {6}
}