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SUMMARY:Cosmology with Democratic Initial Conditions
DTSTART:20160121T140000
DTEND:20160121T150000
DTSTAMP:20260503T144833Z
UID:cb2c942954bd1aeb4cc27d55035bd535ba510136d8d9da54b3517c8e
CATEGORIES:Conferences - Seminars
DESCRIPTION:James A. Unwin\nWIMP Dark Matter generally assumes the Standar
 d Model and Dark Matter form a single thermal bath at early time\, with t
 he Dark Matter relic density set by interactions between these two popula
 tions.  Arguably\, a more compelling assumption is that Dark Matter is n
 ot part of the Standard Model sector.  Even if there are decoupled dark 
 sectors\, then it is a natural expectation that the visible and dark sect
 ors should be democratically reheated after inflation. At late time the D
 ark Matter abundance must be comparable to the baryon abundance\, and it 
 is interesting to investigate how to recover Standard Cosmology from the
 se democratic initial conditions. If the Dark Matter is decoupled from th
 e visible sector and does not undergo freeze-out\, then without a large i
 njection of entropy to the Standard Model\, the Dark Matter will typicall
 y carry too much entropy. We ask what it takes for this scenario to be co
 mpatible with observations and arrive at a novel picture of dark matter w
 ith several interesting consequences.
LOCATION:Cubotron BSP 727 http://plan.epfl.ch/?room=BSP%20727
STATUS:CONFIRMED
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