The effects of waterfall phase transition on curvature perturbations and non-Gaussianity

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• Hassan Firouzjahi (IPM, Iran)
• Friday 20 January 2012, 13:00-14:00
• Pavilion B Potter Room (B1.19).

If you have a question about this talk, please contact Ian A. Morrison.

In this talk we consider different variants of hybrid inflation model where a waterfall phase transition takes place either during or at the end of inflation. Depending on the sharpness of the waterfall transition and whether it happens early during inflation or towards the end of inflation it can have interesting effects on large scale curvature perturbations and non-Gaussianity. In particular, we show that a sharp phase transition happening early on during inflation produces a large spike non-Gaussianity.

This talk is part of the DAMTP Friday GR Seminar series.

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