ИСТИНА

Inflationary models with a scalar field nonminimally coupled both with the Ricci scalar and with the Gauss-Bonnet term are studied. We propose the way of generalization of inflationary scenarios with the Gauss-Bonnet term and a scalar field minimally coupled with the Ricci scalar to the corresponding scenarios with a scalar field nonminimally coupled with the Ricci scalar. Using the effective potential method we construct a set of models with the same values of the scalar spectral index ns​ and the amplitude of the scalar perturbations As​ and different values of the tensor-to-scalar ratio r. The talk is based on the papers by E.O. Pozdeeva and S.Yu. Vernov: arXiv:2104.04995 and arXiv:2104.11111.