Low scale inflation and the curvaton mechanism

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dc.creatorDimopoulos, Konstantinos
dc.creatorLyth, David H.
dc.creatorRodriguez, Yeinzon
dc.date2004-11-08
dc.date2005-03-09
dc.date.accessioned2026-07-07T10:49:17Z
dc.date.available2026-07-07T10:49:17Z
dc.descriptionThe primordial curvature perturbation may be due to a `curvaton' field, which dominates (or almost dominates) the energy density before it decays. In the simplest version of the curvaton model the scale of inflation has to be quite high corresponding to a Hubble parameter H>10^7 GeV. We here explore two modifications of the curvaton model which can instead allow inflation at a low scale. (i) The curvaton is a Pseudo Nambu-Goldstone Boson (PNGB), with a symmetry-breaking phase transition during inflation. (ii) The curvaton mass increases suddenly at some moment after the end of inflation but before the onset of the curvaton oscillations. Both proposals can work but not in a completely natural way. Also, the lower bound on the scale of inflation depends somewhat on the details of the framework used. Nevertheless, we show that inflation with H as low as 1 TeV or lower is possible to be attained.
dc.descriptionLatex file in Revtex style. 17 pages, 3 figures. v2: added material and corrected mistakes to take into account the constraints on the behaviour of the radial field coming from the requirements of the spectral index of density perturbations. v3: typos corrected. Reference added. Version accepted for publication in Journal of High Energy Physics
dc.identifierhttps://arxiv.org/abs/hep-ph/0411119
dc.identifierhttp://arxiv.org/abs/hep-ph/0411119
dc.identifierJHEP0502:055,2005
dc.identifierdoi:10.1088/1126-6708/2005/02/055
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/184169
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titleLow scale inflation and the curvaton mechanism
dc.typetext

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