Events at Physics

<< Summer 2022 Fall 2022 Spring 2023 >>
Subscribe your calendar or receive email announcements of events
Theory Seminar (High Energy/Cosmology)
Gravitational production of scalar dark matter
Date: Tuesday, November 1st
Time: 4:00 pm
Place: Chamberlin 5280
Speaker: Sarunas Verner, University of Florida
Abstract: First, I discuss the out-of-equilibrium production of scalar dark matter (DM) from the inflaton condensate during inflation and reheating. Here I assume that this scalar dark matter is only minimally coupled to gravity and consider the regime of purely gravitational dark matter. For the purely gravitational regime, scalar dark matter quanta are copiously excited during inflation resulting in an infrared (IR) dominated distribution function and a relic abundance that overcloses the universe for a reheating temperature T_{reh} > 34 GeV. I discuss the reheating mechanism and compare perturbative and non-perturbative calculations of the energy density in radiation, and compare the resulting energy density based on these different approaches. I also briefly discuss the isocurvature constraints. This talk is based on arXiv:2206.08940 and arXiv:2109.13280.
Host: George Wojcik
Add this event to your calendar