String Gas Cosmology and Non-Gaussianities

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dc.creatorChen, Bin
dc.creatorWang, Yi
dc.creatorXue, Wei
dc.creatorBrandenberger, Robert
dc.date2007-12-14
dc.date2008-03-05
dc.date.accessioned2026-07-07T09:24:29Z
dc.date.available2026-07-07T09:24:29Z
dc.descriptionRecently it has been shown that string gas cosmology, an alternative model of the very early universe which does not involve a period of cosmological inflation, can give rise to an almost scale invariant spectrum of metric perturbations. Here we calculate the non-Gaussianities of the spectrum of cosmological fluctuations in string gas cosmology, and find that these non-Gaussianities depend linearly on the wave number and that their amplitude depends sensitively on the string scale. If the string scale is at the TeV scale, string gas cosmology could lead to observable non-Gaussianities, if it is close to the Planck scale, then the non-Gaussianities on current cosmological scales are negligible.
dc.description17 pages, 1 figure 4 clarifying sentences added
dc.identifierhttps://arxiv.org/abs/0712.2477
dc.identifierhttp://arxiv.org/abs/0712.2477
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/156112
dc.subjectHigh Energy Physics - Theory
dc.titleString Gas Cosmology and Non-Gaussianities
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