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Consistency relation and inflaton field redefinition in the <i>δN</i> formalism
Domè,nech, Guillem,Gong, Jinn-Ouk,Sasaki, Misao North-Holland Pub. Co 2017 Physics letters. Section B Vol.769 No.-
<P><B>Abstract</B></P> <P>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 <I>δN</I> 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 <I>δN</I> formalism.</P>