Speaker
Jondalar Kuss
Description
Sterile Neutrinos are well motivated Dark Matter candidates. They arise naturally in models with gauged U(1) B-L symmetries to avoid anomalies. While previous studies have focused on the Sterile Neutrino abundance, knowing their spectrum is important to determine whether they can actually explain the observed Dark Matter. I numerically solve the full Boltzmann equation for Sterile Neutrinos in a model with a supercooled B-L phase transition. I identify regions in the parameter space spanned by the mass of the new Z' boson and its gauge coupling where the Sterile Neutrinos thermalize or where they keep a non-thermal spectrum. This allows to compare the model to structure formation constraints.
