Dark matter and baryogenesis from long-lived particles in the visible sector

by Rouzbeh Allahverdi (University of New Mexico)

Wednesday 27 Sept 2023, 11:30 → 13:30 Europe/Zurich

4/2-011 - TH common room (CERN)

I present a minimal extension of the standard model, including a long-lived fermion with weak-scale mass and an O(GeV) fermionic dark matter candidate. Decays of a TeV-scale colored scalar in a radiation-dominated phase bring the former to a thermal abundance and also produce dark matter. The long-lived fermion then drives a period of early matter domination and subsequently decays to reheat the universe and also generate a baryon asymmetry. The allowed parameter space of this model can be probed by proposed long-lived particle searches as well as next-generation neutron-antineutron oscillation experiments.