Consistency relation and inflaton field redefinition in the delta N formalism
Cosmology and Nongalactic Astrophysics
2017-04-19 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
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.
Keywords
Cite
@article{arxiv.1606.03343,
title = {Consistency relation and inflaton field redefinition in the delta N formalism},
author = {Guillem Domenech and Jinn-Ouk Gong and Misao Sasaki},
journal= {arXiv preprint arXiv:1606.03343},
year = {2017}
}
Comments
(v1) 10 pages; (v2) references added, to appear in Physics Letters B