Sommaire:

In this talk I will discuss the main motivations to explore theories of gravity beyond General Relativity. In particular, I will focus on the popular class of scalar-tensor theories, discussing their formulation and how to parametrise them efficiently on a cosmological background. This framework is optimal to describe large class of models at once, which makes it ideal to test deviations from the standard cosmological model. I will discuss some of the main results in the literature, as well as the tools available to compare cosmological data with theoretical predictions. I shall focus mostly on hi_class, an Einstein-Boltzmann solver optimised for beyond-Horndeski models. Finally, I will speculate about the future of alternative theories of gravity and show what we can realistically expect from the next generation of surveys.

Pour plus d'informations, merci de contacter Lavalle J.