Non-Gaussianity from instant and tachyonic preheating

Enqvist, Kari and Jokinen, Asko and Mazumdar, Anupam and Multamaki, Tuomas and Vaihkonen, Antti (2005) Non-Gaussianity from instant and tachyonic preheating. Journal of Cosmology and Astroparticle Physics, 2005 (3). ISSN 1475-7516

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Abstract

We study non-Gaussianity in two distinct models of preheating: instant and tachyonic. In instant preheating non-Gaussianity is sourced by the local terms generated through the coupled perturbations of the two scalar fields. We find that the non-Gaussianity parameter is given by $f_{NL}^{\phi}\sim 2g

Item Type:
Journal Article
Journal or Publication Title:
Journal of Cosmology and Astroparticle Physics
Additional Information:
12 pages, 1 figure, additional discussion, improved constraint on the scale of tachyonic preheating
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
55931
Deposited By:
Deposited On:
17 Jul 2012 15:31
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Feb 2020 08:09