Warming up brane-antibrane inflation

Details Warming up brane-antibrane inflation Warming up brane-antibrane inflation

2011-03-29

arxiv.org/abs/1103.5623v3

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, 2 figures; version to be published in Physical Review D

Scientific paper

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 eta-problem. We illustrate this for D3-antiD3 inflation in flat space with additional flavor D7-branes, where for both a Coulomb-like or a quadratic hybrid potential a sufficient number of e-folds may be obtained for perturbative couplings and O(10-10^4) 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 f_NL \sim O(10).

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