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کلیدواژهها
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Inflation, Cosmological perturbations, Non-Gaussianity, Non-minimal coupling, Observational
constraints
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چکیده
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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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