Brane Inflation and Cosmic String Tension in Superstring Theory
Abstract
In a simple reanalysis of the KKLMMT scenario, we argue that the slow roll condition in the D3-anti-D3-brane inflationary scenario in superstring theory requires no more than a moderate tuning. The cosmic string tension is very sensitive to the conformal coupling: with less fine-tuning, the cosmic string tension (as well as the ratio of tensor to scalar perturbation mode) increases rapidly and can easily saturate the present observational bound. In a multi-throat brane inflationary scenario, this feature substantially improves the chance of detecting and measuring the properties of the cosmic strings as a window to the superstring theory and our pre-inflationary universe.
Keywords
Cite
@article{arxiv.hep-th/0501099,
title = {Brane Inflation and Cosmic String Tension in Superstring Theory},
author = {Hassan Firouzjahi and S. -H. Henry Tye},
journal= {arXiv preprint arXiv:hep-th/0501099},
year = {2008}
}
Comments
Combined bounds from WMAP and SDSS Lyman alpha experiments are added for analysis, changes are added to the table