Work

Supersonic electroweak baryogenesis: achieving baryogenesis for fast bubble walls

Year: 2012

Type: article

Abstract: Standard electroweak baryogenesis in the context of a first order phase transition is effective in generating the baryon asymmetry of the universe if the broken phase bubbles expand at subsonic speed, so that CP asymmetric currents can diffuse in front of the wall. Here we present a new mechanism for electroweak baryogenesis which operates for supersonic bubble walls. It relies on the formation of small bubbles of the symmetric phase behind the bubble wall, in the broken phase, due to the heating of the plasma as the wall passes by. We apply the mechanism to a model in which the Higgs field is coupled to several singlets, and find that enough baryon asymmetry is generated for reasonable values of the parameter space.

Source: Journal of Cosmology and Astroparticle Physics

DOI: 10.1088/1475-7516/2012/01/031

Authors: Chiara Caprini, José M No

Institutions: Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Institut de Physique Théorique, Université Libre de Bruxelles

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: European Commission, Agence Nationale de la Recherche

Award: UNIFICATION IN THE LHC ERA