Date and time: March 26, 2018 at 11:00 CET
Speaker: Hector Ramirez (UVEG)
Abstract: Scalar-tensor theories of gravity are the most general extensions of General Relativity, leading to second-order equations of motion. Several applications have been developed for early- and late-time Cosmology. In the context of inflation, they cover canonical inflation as well as several noncanonical models proposed in the literature. While solving the evolution equations of the perturbations in such a framework is in general a difficult task and the slow-roll approach is not always valid. I will show how to compute the inflationary observables in a simple yet very accurate way using the Generalized Slow-Roll approach, by employing a new model for G-inflation as an example.