Astrophysics > Cosmology and Nongalactic Astrophysics
[Submitted on 10 Jun 2016 (v1), last revised 12 Apr 2017 (this version, v2)]
Title:Consistency relation and inflaton field redefinition in the delta N formalism
View PDFAbstract:We compute for general single-field inflation the intrinsic non-Gaussianity due to the self-interactions of the inflaton field in the squeezed limit. We recover the consistency relation in the context of the delta N formalism, and argue that there is a particular field redefinition that makes the intrinsic non-Gaussianity vanishing, thus improving the estimate of the local non-Gaussianity using the delta N formalism.
Submission history
From: Jinn-Ouk Gong [view email][v1] Fri, 10 Jun 2016 14:32:42 UTC (15 KB)
[v2] Wed, 12 Apr 2017 13:27:33 UTC (12 KB)
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