University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Friday, November 17th 2017
Speaker: Ben von Harling (DESY)
Subject: Electroweak baryogenesis in composite Higgs models

Electroweak baryogenesis is an appealing scenario in which the baryon
asymmetry of the universe is generated during the electroweak phase
transition. However, in the standard model it fails because the phase
transition is not first order. And even if it were, the amount of
CP-violation is also not enough to generate the observed asymmetry. In
this talk, I discuss how these problems can be solved in the context
of composite Higgs models. The electroweak phase transition can be
sufficiently strong if it happens simultaneously with the confining
phase transition of the composite Higgs sector. Furthermore, enough
CP-violation for successful electroweak baryogenesis can arise if the
Yukawa couplings vary during the phase transition.

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