Signatures from Inflationary Physics: non-Gaussianities and Dark Matter

by Davide Racco (Université de Genève)

Aula B (Via della Vasca Navale 84)

Aula B

Via della Vasca Navale 84


Abstract: The phase of primordial inflation offers a window into the physics at high energy scales, and the presence of physical particles in the Universe during that time can disclose to us precious information about those early stages. In my talk, I discuss two possible imprint left by such particles on our present Universe, and the remarkable lessons we could learn. As a first example, future measurements of primordial non-Gaussianities can show us the existence of another minimum in the Higgs potential, with deep implications for particle physics and cosmology. In the second part, I describe how a dark sector could have been produced by gravitational production during inflation, and how subsequent interactions reprocess this abundance to account for dark matter today.