Monday, March 11, 2024
2:30 PM
HP 4351
Leptogenesis from freeze-in
Models of freeze-in feature a departure from equilibrium over an extended period of the early universe’s history, and they can naturally give rise to the observed matter-antimatter asymmetry. I will present several recent developments in freeze-in leptogenesis, including a novel, testable mechanism for the simultaneous production of dark matter and baryogenesis via dark matter oscillations, as well as studies of freeze-in leptogenesis in models of hidden-sector neutrinos. I will highlight the connections between the early universe dynamics and phenomenology, including tests at colliders, and in cosmological and astrophysical observables.