Brane Inflation and Cosmic String Tension in Superstring Theory

Details Brane Inflation and Cosmic String Tension in Superstring Theory Brane Inflation and Cosmic String Tension in Superstring Theory

2005-01-13

arxiv.org/abs/hep-th/0501099v3

JCAP0503:009,2005

Physics

High Energy Physics

High Energy Physics - Theory

Combined bounds from WMAP and SDSS Lyman alpha experiments are added for analysis, changes are added to the table

Scientific paper

10.1088/1475-7516/2005/03/009

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.

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