Inflation from Wrapped Branes

Details Inflation from Wrapped Branes Inflation from Wrapped Branes

2007-09-09

arxiv.org/abs/0709.1170v2

Phys.Rev.D76:123516,2007

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, 2 figures; v2 typos corrected, minor additions, added references

Scientific paper

10.1103/PhysRevD.76.123516

We show that the use of higher dimensional wrapped branes can significantly extend the inflaton field range compared to brane inflation models which use D3-branes. We construct a simple inflationary model in terms of 5-branes wrapping a 2-cycle and traveling towards the tip of the Klebanov-Strassler throat. Inflation ends when the branes reach the tip of the cone and self-annihilate. Assuming a quadratic potential for the brane it is possible to match the CMB data in the DBI regime, but we argue that the backreaction of the brane is important and cannot be neglected. This scenario predicts a strong non-Gaussian signal and possibly detectable gravitational waves.

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