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SUMMARY:Beyond Tree Level Inflation - Louis Leblond (Perimeter Institute)
DTSTART:20100524T120000Z
DTEND:20100524T130000Z
UID:TALK23647@talks.cam.ac.uk
CONTACT:Tasos Avgoustidis
DESCRIPTION:Standard calculations of the statistics of the primordial pert
 urbations generated by inflation are usually done at tree level neglecting
  any loop corrections.  In this talk I will review why this is almost alwa
 ys a very good approximation. I will then explore how the usually small lo
 op contributions could be enhanced either due to strong self-interactions 
 or due to infrared effects. I will show that in some theories\, the loop c
 orrections can be so big that perturbative analyses is no longer valid whi
 le the system is naively still inflating. Finally\, large loop effects cou
 ld lead to interesting observable signatures such as strongly running non-
 Gaussianity (of nearly local type).
LOCATION:CMS\, Pav.B\, CTC Common Room (B1.19)
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