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SUMMARY:Distinguishing inflation and alternative paradigms using primordia
 l features - Xingang Chen\, DAMTP
DTSTART:20110527T120000Z
DTEND:20110527T130000Z
UID:TALK31055@talks.cam.ac.uk
CONTACT:Dr Sebastien Renaux-Petel
DESCRIPTION:In the primordial universe\, particles with mass much larger t
 han the mass-scale of the event-horizon (such as the Hubble parameter in i
 nflation) exist ubiquitously\, and can be excited from time to time and os
 cillate quickly around their minima. These excitations can induce specific
  patterns in density perturbations\, which record the time dependence of t
 he scale factor of the primordial universe\, thus provide direct evidence 
 for the inflation paradigm or its alternatives. Such effects are conventio
 nally integrated out in theoretical and data analyses\, but can be accessi
 ble for experiments targeting on density perturbations with high multiples
 . 
LOCATION:Pavilion B Potter Room (B1.19)
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