Higgs Boson Signatures of MSSM Electroweak Baryogenesis

Details Higgs Boson Signatures of MSSM Electroweak Baryogenesis Higgs Boson Signatures of MSSM Electroweak Baryogenesis

2009-03-17

arxiv.org/abs/0903.3038v2

Phys.Rev.D79:115020,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 6 figures; Corrected typos and added reference

Scientific paper

10.1103/PhysRevD.79.115020

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.

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