Speaker
Kyohei Mukaida
(DESY)
Description
In inflation models driven by an axion-like particle the inflaton may have a Chern-Simons coupling to the Standard Model (SM) U$(1)_Y$. In this talk we show that this setup is a highly predictive baryogenesis model without further ingredients other than the SM and the inflaton (and the origin of neutrino mass). During inflation this Chern-Simons coupling sources a dual production of the SM chiral fermions and maximally helical U$(1)_Y$ gauge fields associated with the SM chiral anomaly equation ala Schwinger effect. We will discuss the possibility where the anomalous transport of these primordial chiral asymmetries and the helical U$(1)_Y$ gauge fields after inflation gives rise to the present baryon asymmetry.
Primary author
Kyohei Mukaida
(DESY)
