Non-Gaussianities in Single Field Inflation

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• Raquel Ribeiro (DAMTP)
• Monday 07 March 2011, 13:00-14:00
• CMS, Pav.B, CTC Common Room (B1.19).

If you have a question about this talk, please contact Tasos Avgoustidis.

Non-gaussian statistics are a powerful discriminant between inflationary models, especially those with non-canonical kinetic structure. Focusing on theories where the Lagrangian is an arbitrary Lorentz-invarant function of a scalar field and its first derivatives, we review the computation of the observable three-point function. We present results of the “next-order” slow-roll corrections in closed form, finding that these can be quite large – of order 70% in DBI inflation, for example. We show that these results verify Maldacena’s consistency condition at next-order for the squeezed limit of the bispectrum, and determine its leading-order scale dependence.

This talk is part of the Cosmology Lunch series.

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