Baryogenesis in the two-Higgs doublet model

Fromme, Lars, Huber, Stephan J and Seniuch, Michael (2006) Baryogenesis in the two-Higgs doublet model. Journal of High Energy Physics, 2006 (11). 038-038. ISSN 1126-6708

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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.

Item Type: Article
Additional Information: I was collaboration leader. The numerics was carried out by Fromme and Seniuch, while the conceptual parts of the computation were mostly done by myself. The paper shows in detail that electroweak baryogenesis works successfully in the Two Higgs Doublet Model, in contrast to earlier work on the subject.
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Stephan Huber
Date Deposited: 06 Feb 2012 20:47
Last Modified: 03 Jul 2019 02:45

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