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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:5
UID:UW-Physics-Event-7928
DTSTART:20221101T210000Z
DTEND:20221101T220000Z
DTSTAMP:20260414T071354Z
LAST-MODIFIED:20221031T140418Z
LOCATION:Chamberlin 5280
SUMMARY:Gravitational production of scalar dark matter\, Theory Semina
 r (High Energy/Cosmology)\, Sarunas Verner\, University of Florida
DESCRIPTION:First\, I discuss the out-of-equilibrium production of sca
 lar dark matter (DM) from the inflaton condensate during inflation and
  reheating. Here I assume that this scalar dark matter is only minimal
 ly 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 overc
 loses the universe for a reheating temperature T_{reh} > 34 GeV. I dis
 cuss the reheating mechanism and compare perturbative and non-perturba
 tive 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 ar
 Xiv:2206.08940 and arXiv:2109.13280.
URL:https://www.physics.wisc.edu/events/?id=7928
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