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Non-Gaussianities in Single Field Inflation

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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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Room GS15 at the William Gates Building and on Zoom: https://cl-cam-ac-uk.zoom.us/j/4361570789?pwd=Nkl2T3ZLaTZwRm05bzRTOUUxY3Q4QT09&from=addon Seminar Room E, 17 Mill Lane Average on weekdays: 8909.7964876 kWh

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