ar X iv : a st ro - p h / 03 03 16 8 v 3 2 M ay 2 00 3 Inflation in Gauss – Bonnet Brane Cosmology


The effect of including a Gauss–Bonnet contribution in the bulk action is investigated within the context of the steep inflationary scenario. When inflation is driven by an exponential inflaton field, this Gauss–Bonnet term allows the spectral index of the scalar perturbation spectrum to take values in the range 0.944 and 0.989, thereby bringing the… (More)


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