Speaker
Junho Song
(Chung ang university)
Description
In the Peccei–Quinn (PQ) pole inflation scenario within the KSVZ model, we propose a spontaneous baryogenesis mechanism incorporating a type-I seesaw model to simultaneously explain the observed baryon asymmetry and axion dark matter abundance in the Universe.
Both the dark matter abundance and the baryon asymmetry originate from a non-zero axion velocity, naturally generated by an explicit PQ-symmetry-breaking potential during inflation. For the successful cogenesis, inflation and DM abundance, we need the limited axion decay constant, 4-9*10^8 GeV.