Hybrid Inflation and Brane-Antibrane System

Details Hybrid Inflation and Brane-Antibrane System Hybrid Inflation and Brane-Antibrane System

2003-05-13

arxiv.org/abs/hep-th/0305104v2

JCAP 0307 (2003) 009

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, 7 Figs (added a Report-no and two references)

Scientific paper

We study a string theory inspired model for hybrid inflation in the context of a brane-antibrane system partially compactified on a compact submanifold of (a caricature of) a Calabi-Yau manifold. The interbrane distance acts as the inflaton, whereas the end of the inflationary epoch is brought about by the rapid rolling of the tachyon. The number of e-foldings is sufficiently large and is controlled by the initial conditions. The slow roll parameters, however, are essentially determined by the geometry and have little parametric dependence. Primordial density fluctuations can be made consistent with current data at the cost of reducing the string scale.

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