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SUMMARY:Decoding the bispectrum of single-field inflation - Raquel Ribeiro
  (DAMTP)
DTSTART:20111010T120000Z
DTEND:20111010T130000Z
UID:TALK32538@talks.cam.ac.uk
CONTACT:Camille Bonvin
DESCRIPTION:Non-gaussian statistics of the primordial fluctuations encode 
 precise information on whichever microphysics operated during the early Un
 iverse. In anticipation of Planck's results\, our best hope is to use obse
 rvational data to place tight constraints on inflationary models. In this 
 talk I will review primordial non-gaussianities arising in single-field in
 flation. I will argue that the bispectrum shapes present in different theo
 ries are generically very similar\, which can undermine the ability of usi
 ng shapes to distinguish between models with different microphysics. Howev
 er\, I will argue it might still be possible to tell models apart by using
  a mode decomposition. I will illustrate this method using the examples of
  DBI and k-inflation.\n\nThis talk will be based on arXivs 1103.4126 and 1
 108.3839.
LOCATION:CMS\, Pav.B\, CTC Common Room (B1.19)
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