Large Non-Gaussianity in Non-Minimally Coupled Derivative Inflation with Gauss-Bonnet Correction

Understand

We study a nonminimal derivative inflationary model in the presence of the Gauss-Bonnet term.

• To have a complete treatment of the model, we consider a general form of the nonminimal derivative function and also the Gauss-Bonnet coupling term.
• By following the ADM formalism, expanding the action up to the third order in the perturbations and using the correlation functions, we study the perturbation and its non-Gaussian feature in details.
• We also study the consistency relation that gets modified in the presence of the Gauss-Bonnet term in the action.