Textures and Semi-Local Strings in SUSY Hybrid Inflation

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dc.creatorBattye, Richard A.
dc.creatorGarbrecht, Bjorn
dc.creatorPilaftsis, Apostolos
dc.date2008-07-10
dc.date.accessioned2026-07-07T11:52:28Z
dc.date.available2026-07-07T11:52:28Z
dc.descriptionGlobal topological defects may account for the large cold spot observed in the Cosmic Microwave Background. We explore possibilities of constructing models of supersymmetric F-term hybrid inflation, where the waterfall fields are globally SU(2)-symmetric. In contrast to the case where SU(2) is gauged, there arise Goldstone bosons and additional moduli, which are lifted only by masses of soft-supersymmetry breaking scale. The model predicts the existence of global textures, which can become semi-local strings if the waterfall fields are gauged under U(1)_X. Gravitino overproduction can be avoided if reheating proceeds via the light SU(2)-modes or right-handed sneutrinos. For values of the inflaton- waterfall coupling >=10^-4, the symmetry breaking scale imposed by normalisation of the power spectrum generated from inflation coincides with the energy scale required to explain the most prominent of the cold spots. In this case, the spectrum of density fluctuations is close to scale-invariant which can be reconciled with measurements of the power spectrum by the inclusion of the sub-dominant component due to the topological defects.
dc.description29 pages
dc.identifierhttps://arxiv.org/abs/0807.1729
dc.identifierhttp://arxiv.org/abs/0807.1729
dc.identifierJCAP0809:020,2008
dc.identifierdoi:10.1088/1475-7516/2008/09/020
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204237
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleTextures and Semi-Local Strings in SUSY Hybrid Inflation
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