Cold electroweak baryogenesis

by Anders Tranberg (University of Sussex)

Thursday 24 Feb 2005, 14:00 → 15:00 Europe/Zurich

TH Auditorium (CERN)

Electroweak Baryogenesis is a popular scenario for explaining the observed baryon asymmetry of the Universe. However, although the original scenario was intended to use only Standard Model physics, it has turned out that the electroweak phase transition is too weak, and the SM CP-violation too small to correctly account for the magnitude of the asymmetry. Extending the SM may solve these problems. We choose a different path by observing that both constraints are related to electroweak symmetry breaking taking place at finite temperature. Building on earlier work, we propose that symmetry breaking is triggered at zero temperature shortly after inflation. I will review this scenario of Cold Electroweak Baryogenesis, concentrating on numerical calculations of the generated asymmetry.