Curvaton and the inhomogeneous end of inflation

Hooshyar Assadullahi, Hassan Firouzjahi, Mohammad Hossein Namjoo, David Wands

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We study the primordial density perturbations and non-Gaussianities generated from the combined effects of an inhomogeneous end of inflation and curvaton decay in hybrid inflation. This dual role is played by a single isocurvature field which is massless during inflation but acquire a mass 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.
Original languageEnglish
Pages (from-to)024
Number of pages1
JournalJournal of Cosmology and Astroparticle Physics
Issue number12
Publication statusPublished - 18 Dec 2012


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