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SUMMARY:Large non-Gaussianity from slow-roll inflation - Christian Byrnes 
 (Heidelberg)
DTSTART:20090306T130000Z
DTEND:20090306T140000Z
UID:TALK16545@talks.cam.ac.uk
CONTACT:Dr H K Kunduri
DESCRIPTION:Non-Gaussianity of the primordial curvature perturbation is a 
 powerful and topical way of distinguishing between the many possible model
 s of inflation. While the simplest models of inflation predict a tiny leve
 l of non-Gaussianity\, there are many models which predict an observable l
 evel of non-Gaussianity such as the curvaton scenario\, modulated reheatin
 g etc. In this talk I show that it is possible to generate a large level o
 f non-Gaussianity (f_NL~100) during multiple-field inflation\, without bre
 aking the slow-roll conditions. The non-Gaussianity is generated on super-
 Hubble scales and is of the local form. I present the general conditions r
 equired to generate a large non-Gausssianity and quantify the fine tuning 
 of the initial conditions required to achieve this. Finally I apply these 
 conditions to the specific model of hybrid inflation.
LOCATION:Pavilion B Potter Room (B1.19)
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