The Robustness of n_s < 0.95 in Racetrack Inflation

Details The Robustness of n_s < 0.95 in Racetrack Inflation The Robustness of n_s < 0.95 in Racetrack Inflation

2007-12-04

arxiv.org/abs/0712.0535v1

JCAP0802:020,2008

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, 2 figures

Scientific paper

10.1088/1475-7516/2008/02/020

A spectral index n_s < 0.95 appears to be a generic prediction of racetrack inflation models. Reducing a general racetrack model to a single-field inflation model with a simple potential, we obtain an analytic expression for the spectral index, which explains this result. By considering the limits of validity of the derivation, possible ways to achieve higher values of the spectral index are described, although these require further fine-tuning of the potential.

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