Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of PLANCK 2015 Data

Understand

We study the dynamics of a generalized inflationary model in which both the scalar field and its derivatives are coupled to the gravity.

• We consider a general form of the nonminimal derivative coupling in order to have a complete treatment of the model.
• By expanding the action up to the second order in perturbation, we study the spectrum of the primordial modes of the perturbations.
• Also, by expanding the action up to the third order and considering the three point correlation functions, the amplitude of the non-Gaussianity of the primordial perturbations is studied both in equilateral and orthogonal configurations.