Year: 2010
Type: preprint
Abstract: We study non-gaussianity effects, using the $δN$ formalism, in a multi-field inflationary model consisting of Kähler moduli derived from type IIB string compactification in the large volume limit. The analytical work in this paper mostly follows the separable potential method developed by Vernizzi and Wands. The numerical analysis is then used in computing non-gaussianity beyond slow-roll regime. The possibility of the curvaton scenario is also discussed. We give the condition for the existence of the curvaton and calculate the non-guassianity generated by the curvaton decay in the large volume limit.
Source: arXiv (Cornell University)
Authors: Berglund, Per, Ren, Guoqin
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: National Science Foundation
OpenAlex ID: W1613431735