Baryogenesis in the Two-Higgs Doublet Model

Details Baryogenesis in the Two-Higgs Doublet Model Baryogenesis in the Two-Higgs Doublet Model

2006-05-22

arxiv.org/abs/hep-ph/0605242v2

JHEP 0611:038,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 7 figures

Scientific paper

10.1088/1126-6708/2006/11/038

We consider the generation of the baryon asymmetry in the two-Higgs doublet model. Investigating the thermal potential in the presence of CP violation, as relevant for baryogenesis, we find a strong first-order phase transition if the extra Higgs states are heavier than about 300 GeV. The mass of the lightest Higgs can be as large as about 200 GeV. We compute the bubble wall properties, including the profile of the relative complex phase between the two Higgs vevs. The baryon asymmetry is generated by top transport, which we treat in the WKB approximation. We find a baryon asymmetry consistent with observations. The neutron electric dipole moment is predicted to be larger than about 10^{-27}ecm and can reach the current experimental bound. Low values of tan\beta are favored.

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