Speaker
Soubhik Kumar
Description
Heavy axions can arise in the context of Grand Unified theories where a dark gauge group unifies with the SM gauge group. In this talk, I will describe how keV-MeV mass axions can account for DM relic density in the presence of an early matter dominated era due to the glueballs of the same dark sector. The resulting parameter space motivates searches for decaying dark matter with the next generation X-ray and gamma-ray telescopes. I will also describe how a second, heavier axion can explain the observed baryon asymmetry with the lighter axion still serving as the DM candidate.
Primary author
Soubhik Kumar
