Year: 2011
Type: article
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 $\ensuremath{\eta}$-problem. We illustrate this for D3-$\overline{\mathrm{D}3}$ 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 $\mathcal{O}(10--{10}^{4})$ 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 ${f}_{NL}\ensuremath{\sim}\mathcal{O}(10)$.
Authors: Mar Bastero-Gil, Arjun Berera, João G. Rosa
Institutions: Universidad de Granada, University of Edinburgh
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: G1327502800
OpenAlex ID: W2126695069