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Higher order contributions to the primordial non-Gaussianity

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<mark>Journal publication date</mark>2006
<mark>Journal</mark>Journal of Cosmology and Astroparticle Physics
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

In this paper we calculate additional contributions to the part of the non-Gaussianity of the primordial curvature perturbation ζ that comes from the three-point correlator of the field perturbations. We estimate this contribution using the following models for the origin of ζ: single-component inflation, multicomponent 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 ever be detected.