University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Friday, September 30th 2016
Speaker: Louis Yang (UCLA)
Subject: Leptogenesis via the Relaxation of Higgs and other Scalar Fields

During inflation, a scalar field with a shallow potential such as the Higgs field can develop a large vacuum expectation value (VEV) through quantum fluctuation. The relaxation of the scalar field from this large value to the minimum of its potential after inflation can lead to several interesting consequences in the Universe. In this talk, I will explore a possibility that the baryon number asymmetry of the Universe is generated via the Higgs field relaxation during reheating. I will also show that the same leptogenesis mechanism can be applied to other scalar fields explaining the matter-antimatter asymmetry of the Universe.

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