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DBI inflation with a non-minimally coupled Gauss-Bonnet term

We study the inflation in a model with a Gauss-Bonnet term which is non-minimally coupled to a DBI field. We study the spectrum of the primordial perturbations in detail. The non-Gaussianity of this model is considered and the amplitude of the non-Gaussianity is studied in both the equilateral and orthogonal configurations. By taking various functions of the DBI field, inflaton potential and the Gauss-Bonnet coupling term, we test the model with observational data and find some constraints on the Gauss-Bonnet coupling parameter.

preprint2013arXivOpen access
Kourosh NozariNarges Rashidi
astro-ph.COgr-qchep-th
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Kourosh NozariNarges Rashidi

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