Speaker: Louis Yang (IPMU)
Title: Postinflationary Higgs Relaxation and Leptogenesis
The discovery of the Higgs boson with a mass of 125 GeV implies a relatively slow rise of the Standard Model Higgs potential at large energy scales. A scalar field with such a shallow potential can develop a large vacuum expectation value (VEV) during inflation through quantum fluctuation. The relaxation of the large VEV of the Higgs field after inflation may play an important role in the early stage of the universe. In this talk, I will talk about the generation of large Higgs VEV and how to do leptogenesis using the postinflationary relaxation of the Higgs field. I will also discuss one observable consequence of this relaxation leptogenesis model, which could explain the excess found in the cosmic infrared background (CIB) radiation anisotropy.

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Last-modified: 2017-10-24 (火) 14:20:34 (629d)