Systematics of multi-field effects at the end of warped brane inflation

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dc.creatorChen, Heng-Yu
dc.creatorGong, Jinn-Ouk
dc.creatorShiu, Gary
dc.date2008-07-11
dc.date2008-10-13
dc.date.accessioned2026-07-07T11:52:29Z
dc.date.available2026-07-07T11:52:29Z
dc.descriptionWe investigate in the context of brane inflation the possibility of additional light scalar fields generating significant power spectrum and non-Gaussianities at the end of inflation affecting the CMB scale observations. We consider the specific mechanism outlined by Lyth and describe the necessary criteria for it to be potentially important in a warped throat. We also discuss different mechanisms for uplifting the vacuum energy which can lead to different dominant contributions of the inflaton potential near the end of inflation. We then apply such criteria to one of the most detailed brane inflation models to date, and show that inflation can persist towards the tip of the throat, however for the specific stable inflationary trajectory, the light residual isometry direction becomes degenerate. We also estimate the effects for other inflationary trajectories with non-degenerate residual isometries.
dc.description(v1) 42 pages, 2 figures; (v2) typos corrected, more clarifications added, 1 reference added, to appear in JHEP; (v3) matched with JHEP version
dc.identifierhttps://arxiv.org/abs/0807.1927
dc.identifierhttp://arxiv.org/abs/0807.1927
dc.identifierJHEP0809:011,2008
dc.identifierdoi:10.1088/1126-6708/2008/09/011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204243
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSystematics of multi-field effects at the end of warped brane inflation
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