Higher order contributions to the primordial non-gaussianity

Details Higher order contributions to the primordial non-gaussianity Higher order contributions to the primordial non-gaussianity

2006-03-20

arxiv.org/abs/astro-ph/0603534v2

JCAP 0606 (2006) 013

Astronomy and Astrophysics

Astrophysics

6 pages. 2 figures. Typos corrected. Version accepted in JCAP

Scientific paper

10.1088/1475-7516/2006/06/013

In this paper we calculate additional contributions to that part of the non-Gaussianity of the curvature perturbation, which come from the three-point correlator of the field perturbations. We estimate this contribution in the following models for its origin: single-component inflation, multi-component chaotic inflation, a two-component "hybrid" inflationary model, and the curvaton scenario. In all of these models, the additional contributions to the primordial non-gaussianity considered here, are too small to be ever detected.

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