May 16 – 19, 2023
Texas A&M University
US/Central timezone

Dark Matter and Baryogenesis from Long-Lived Particles in the Visible Sector

May 19, 2023, 11:40 AM
Hawking Auditorium (Texas A&M University)

Hawking Auditorium

Texas A&M University


Rouzbeh Allahverdi (University of New Mexico)


A minimal extension of the standard model is presented that includes 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 while also producing dark matter. The long-lived fermion then drives a period of early matter domination and decays to reheat the universe and also generates 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.

Primary author

Rouzbeh Allahverdi (University of New Mexico)

Presentation materials