Hello everyone, 

next JC this Friday (exceptional date) at 2pm. 

Martina will talk about non-thermal leptogenesis and her master project. 

Abstract:

In this talk, we intend to provide an alternative path to the standard thermal leptogenesis mainly studied in the literature, focusing on the possibility to source non-thermal leptogenesis via decays of ALPs.

We estimate the contribution of this non-thermal ALP leptogenesis and compute it by solving the associated Boltzmann equations, assuming that the species involved are in kinetic equilibrium. The advantages of this alternative approach are that, while standard leptogenesis would undergo strong washout at the temperatures of interest for our mechanism, our non-thermal leptogenesis via ALP decays avoids this, and the secondary non-thermal population of $N$, produced via ALP decays, would fuel leptogenesis, enhancing the resulting baryon asymmetry.

I hope to see you there, 

Best, 

Miguel