## “School of Astronomy”

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Paper   IPM / Astronomy / 12603
School of Astronomy
Title:   Curvaton and the inhomogeneous end of inflation
Author(s):
 1 Hooshyar Assadullahi 2 Hassan Firouzjahi 3 Mohammad Hossein Namjoo 4 David Wands
Status:   Published
Journal: JCAP
Year:  2012
Pages:   024
Supported by:  IPM
Abstract:
We study the curvature perturbations and non-Gaussianities generated from the combined effects of inhomogeneous end of inflation and curvaton mechanism. This double role is played by an isocurvature field which is massless during inflation but acquire a mass instantaneously at the end of inflation via the waterfall phase transition. We calculate the resulting primordial non-Gaussianity characterized by the non-linearity parameter, fNL, recovering the usual end-of-inflation result when the field decays promptly and the usual curvaton result if the field decays sufficiently late.