Non-Gaussianity from Preheating

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dc.creatorEnqvist, Kari
dc.creatorJokinen, Asko
dc.creatorMazumdar, Anupam
dc.creatorMultamaki, Tuomas
dc.creatorVaihkonen, Antti
dc.date2004-11-15
dc.date2005-03-18
dc.date.accessioned2026-07-07T02:15:49Z
dc.date.available2026-07-07T02:15:49Z
dc.descriptionWe consider a two-field model for inflation where the second order metric perturbations can be amplified by a parametric resonance during preheating. We demonstrate that there can arise a considerable enhancement of non-Gaussianity sourced by the local terms generated through the coupled perturbations. We argue that the non-Gaussianity parameter could be as large as f_{NL} ~ 50. Our results may provide a useful test of preheating in future CMB experiments.
dc.description4 pages ReVTeX4, discussion and references added, conclusions unchanged
dc.identifierhttps://arxiv.org/abs/astro-ph/0411394
dc.identifierhttp://arxiv.org/abs/astro-ph/0411394
dc.identifierPhys.Rev.Lett. 94 (2005) 161301
dc.identifierdoi:10.1103/PhysRevLett.94.161301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/8557
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleNon-Gaussianity from Preheating
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