4D Seminar: Kyohei Mukaida (CERN) “Leptogenesis from axion inflation”

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Event Details

4D Seminar:

Kyohei Mukaida (CERN)

“Leptogenesis from Axion Inflation”


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. During inflation, this Chern-Simons coupling sources dual production of B+L asymmetry and maximally helical U(1)_Y gauge fields, associated with the SM chiral anomaly equation. In this talk, we will show that this setup assisted by the right-handed Majorana neutrino provides a new leptogenesis mechanism.