WMAP Bounds on Braneworld Tachyonic Inflation

Details WMAP Bounds on Braneworld Tachyonic Inflation WMAP Bounds on Braneworld Tachyonic Inflation

2003-07-15

arxiv.org/abs/astro-ph/0307292v2

Int.J.Mod.Phys.D13:1927,2004

Astronomy and Astrophysics

Astrophysics

15 pages, 2 eps figures

Scientific paper

10.1142/S0218271804005195

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.

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