Inflation driven by single geometric tachyon with D-brane orbiting around NS5-branes

Details Inflation driven by single geometric tachyon with D-brane orbiting around NS5-branes Inflation driven by single geometric tachyon with D-brane orbiting around NS5-branes

2011-06-21

arxiv.org/abs/1106.4118v2

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, minor clarification added, revised version to appear in PLB

Scientific paper

We investigate models in which inflation is driven by a single geometrical tachyon. We assume that the D-brane as a probe brane in the background of NS5-branes has non-zero angular momentum which is shown to play similar role as the number of the scalar fields of the assisted inflation. We demonstrate that the angular momentum corrected effective potential allows to account for the observational constraint on COBE normalization, spectral index $n_S$ and the tensor to scalar ratio of perturbations consistent with WMAP seven years data.

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