Higgs Boson Signatures of MSSM Electroweak Baryogenesis

Abstract

Electroweak baryogenesis (EWBG) in the MSSM can account for the cosmological baryon asymmetry, but only within a restricted region of the parameter space. In particular, MSSM EWBG 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.

19 pages, 6 figures; Corrected typos and added reference

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Cited by in corpus (8)

• Detection of Early-Universe Gravitational Wave Signatures and Fundamental Physics
• Cosmological Phase Transitions and their Properties in the NMSSM
• GUT Baryogenesis With Primordial Black Holes
• Prospects for MSSM Higgs Searches at the Tevatron
• A concise review on some Higgs-related new physics models in light of current experiments
• Focus Point in the Light Stop Scenario
• Exploring CP-violation in $Y=0$ inert triplet with real singlet
• Gravitational waves from patterns of electroweak symmetry breaking: an effective perspective