Fine-Tuning in DBI Inflationary Mechanism

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dc.creatorChen, Xingang
dc.date2008-07-21
dc.date2008-11-16
dc.date.accessioned2026-07-07T12:38:42Z
dc.date.available2026-07-07T12:38:42Z
dc.descriptionWe show a model-independent fine-tuning issue in the DBI inflationary mechanism. DBI inflation requires a warp factor h small enough to sufficiently slow down the inflaton. On the other hand, the Einstein equation in extra dimensions under the inflationary background deforms the warp space in the IR side. Generically these two locations coincide with each other, spoiling the DBI inflation. The origin and tuning of this ``h-problem'' is closely related, through the AdS/CFT duality, to those of the well-known ``eta-problem'' in the slow-roll inflationary mechanism.
dc.description13 pages; v4, several discussions expanded, JCAP version
dc.identifierhttps://arxiv.org/abs/0807.3191
dc.identifierhttp://arxiv.org/abs/0807.3191
dc.identifierJCAP 0812:009,2008
dc.identifierdoi:10.1088/1475-7516/2008/12/009
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218853
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleFine-Tuning in DBI Inflationary Mechanism
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