Non-minimally Coupled Tachyonic Inflation in Warped String Background

Details Non-minimally Coupled Tachyonic Inflation in Warped String Background Non-minimally Coupled Tachyonic Inflation in Warped String Background

2004-11-23

arxiv.org/abs/hep-th/0411210v2

JHEP 0502:052,2005

Physics

High Energy Physics

High Energy Physics - Theory

minor typos corrected and references added

Scientific paper

10.1088/1126-6708/2005/02/052

We show that the non-minimal coupling of tachyon field to the scalar curvature, as proposed by Piao et al, with the chosen coupling parameter does not produce the effective potential where the tachyon field can roll down from T=0 to large $T$ along the slope of the potential. We find a correct choice of the parameters which ensures this requirement and support slow-roll inflation. However, we find that the cosmological parameter found from the analysis of the theory are not in the range obtained from observations. We then invoke warped compactification and varying dilaton field over the compact manifold, as proposed by Raeymaekers, to show that in such a setup the observed parameter space can be ensured.

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