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SUMMARY:Oscillons after Inflation - Mustafa Amin (KICC Cambridge)
DTSTART:20121029T130000Z
DTEND:20121029T140000Z
UID:TALK39882@talks.cam.ac.uk
CONTACT:Camille Bonvin
DESCRIPTION:Our understanding of the universe between the end of inflation
  and production of light elements is incomplete. How did inflation end? Wh
 at did the universe look like at the end of inflation? In this talk\,  I w
 ill discuss the different scenarios of particle production at the end of i
 nflation ((p)reheating). I will concentrate on a particular scenario: the 
 fragmentation of the inflaton into localized\,  long-lived excitations of 
 the inflaton field (oscillons)\, which end up dominating the energy densit
 y of the universe (if couplings to other fields are weak). Oscillons are p
 roduced in a large class of inflationary models which are theoretically we
 ll motivated and observationally consistent with the cosmic microwave back
 ground anisotropies. I will discuss conditions for their existence\, emerg
 ence and stability and also report on what we have learnt about the fragme
 ntation process from lattice simulations. Finally\, I will briefly discuss
  possible consequences of oscillons in the early universe including a dela
 y in radiation domination.
LOCATION:CMS\, Pav.B\, CTC Common Room (B1.19)
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