WMAP Bounds on Braneworld Tachyonic Inflation

Abstract

We analyse the implications of the Wilkinson Microwave Anisotropy Probe (WMAP) results for a braneworld tachyonic model of inflation. We find that WMAP bounds on $n_s$ allow us to constrain significantly the parameter space of the model; in particular, extremely weak string coupling is required, $g_s\sim 10^{-15}$. Moreover, our analysis shows that the running of the scalar spectral index is within the bounds determined by WMAP for the allowed range of model parameters; however, it is not possible to obtain $n_s>1$ on large scales and $n_s<1$ on small scales.

15 pages, 2 eps figures

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Cited by in corpus (8)

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• Prospects of Inflation
• Remarks on Tachyon Driven Cosmology
• Holographic Cosmology 3.0
• Non-minimally Coupled Tachyonic Inflation in Warped String Background
• Tachyonic Inflation in a Warped String Background
• Stability of a tachyon braneworld