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Higher order contributions to the primordial non-gaussianity

Ignacio Zaballa·Yeinzon Rodriguez·David H. Lyth
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Abstract

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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Ignacio Zaballa, Yeinzon Rodriguez, David H. Lyth. 2006-06-15. Higher order contributions to the primordial non-gaussianity. https://doi.org/10.1088/1475-7516%2F2006%2F06%2F013

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