A Delicate Universe
High Energy Physics - Theory
2008-11-26 v1 Astrophysics
Abstract
We investigate whether explicit models of warped D-brane inflation are possible in string compactifications. To this end, we study the potential for D3-brane motion in a warped conifold that includes holomorphically-embedded D7-branes involved in moduli stabilization. The presence of the D7-branes significantly modifies the inflaton potential. We construct an example based on a very simple and symmetric embedding due to Kuperstein, z_1 = constant, in which it is possible to fine-tune the potential so that slow roll inflation can occur. The resulting model is rather delicate: inflation occurs in the vicinity of an inflection point, and the cosmological predictions are extremely sensitive to the precise shape of the potential.
Keywords
Cite
@article{arxiv.0705.3837,
title = {A Delicate Universe},
author = {Daniel Baumann and Anatoly Dymarsky and Igor R. Klebanov and Liam McAllister and Paul J. Steinhardt},
journal= {arXiv preprint arXiv:0705.3837},
year = {2008}
}