Sichuan University and IBS CTPU-CGA joint workshop on frontier of theoretical particle physics and gravity

Axion inflation with gauged lepton flavor symmetry, large lepton asymmetry, and helium abundance

Not scheduled

20m

Xiangqing Ting (祥慶㕔), 2F of Xiangyu Hotel (成都祥宇宾馆)

Speaker

Kohei Kamada (HIAS UCAS)

Description

Axion inflation can have a Chern-Simons coupling to gauge fields. Depending on the gauge fields, it gives rise to the magnetic field production together with fermion asymmetry. For example, in the case of U(1) hypergauge field in the Standard Model, we generate B+L asymmetry. In this talk, I will examine the case of U(1) gauged lepton flavor symmetry, which can produce lepton asymmetry. Their implications on the Big Bang Nucleosynthesis will be discussed.