Abstract
We study an inflationary model which a tachyon field, that is nonminimally coupled to the Gauss-Bonnet term, drives the inflation. The primordial perturbations in this setup are studied with details. By taking an exponential potential into account and performing a numerical analysis on the perturbation parameters, we obtain some constraints on the Gauss-Bonnet coupling parameter. Finally, the non-Gaussianity feature of the primordial tachyonic perturbations in this setup is studied.
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Nozari, K., Aghabararian, R. & Rashidi, N. Non-Gaussianity of scalar perturbations in tachyon field inflation coupled to Gauss-Bonnet curvature. Astrophys Space Sci 358, 24 (2015). https://doi.org/10.1007/s10509-015-2423-3
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DOI: https://doi.org/10.1007/s10509-015-2423-3