Warming up brane-antibrane inflation
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 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).
Keywords
Cite
@article{arxiv.1103.5623,
title = {Warming up brane-antibrane inflation},
author = {Mar Bastero-Gil and Arjun Berera and Joao G. Rosa},
journal= {arXiv preprint arXiv:1103.5623},
year = {2015}
}
Comments
8 pages, 2 figures; version to be published in Physical Review D