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Warming up brane-antibrane inflation

Research output: Contribution to journalArticle

Original languageEnglish
Article number103503
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume84
Issue number10
DOIs
Publication statusPublished - 1 Nov 2011

Abstract

We show that, in constructions with additional intersecting D-branes, brane-antibrane inflation may naturally occur in a warm regime, such that strong dissipative effects damp the inflaton’s motion, greatly alleviating the associated η-problem. We illustrate this for D3-D3¯ inflation in flat space with additional flavor D7 branes, where for a Coulomb-like or quadratic hybrid potential a sufficient number of e-folds may be obtained for perturbative couplings and O(10-104) branes. This is in clear contrast with the corresponding cold scenarios, thus setting the stage for more realistic constructions within fully stabilized compactifications. Such models generically predict a negligible amount of tensor perturbations and non-Gaussianity fNL˜O(10).

ID: 1376811