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arxiv: 1210.7118 · v3 · pith:UUNR5E25new · submitted 2012-10-26 · ✦ hep-ph · astro-ph.CO· hep-th

Non-Gaussianity in the inflating curvaton

classification ✦ hep-ph astro-ph.COhep-th
keywords curvatoninflatingcurvatureinflationnon-gaussianityperturbationanalyticcompare
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Inflating curvaton can create curvature perturbation when the curvaton density is slowly varying. Using the delta-N formalism, we discuss the evolution of the curvature perturbation during curvaton inflation and find analytic formulation of the non-Gaussianity parameter. We first consider the inflating curvaton with sufficiently long inflationary expansion. Then we compare the result with short curvaton inflation.

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