Higher order contributions to the primordial non-gaussianity

Zaballa, Ignacio; Rodriguez, Yeinzon; Lyth, David H.

Higher order contributions to the primordial non-gaussianity

Authors

Zaballa, Ignacio

Rodriguez, Yeinzon

Lyth, David H.

Description

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