Giovanni Cabass: New Physics from Galaxy Clustering

After reviewing the successes of cosmology in discovering physics beyond the Standard Model, I discuss the way forward in light of the wealth of upcoming new data from galaxy clustering surveys, which probe the structure of the universe on its largest scales. I discuss how the modern techniques of the Effective Field Theory of Large-Scale Structure have been and will continue to be fundamental in discovering new light degrees of freedom and interactions in the dark sector, learning the composition and properties of dark matter, and constraining dark energy and the epoch of cosmological inflation, with a precision that will soon reach and then surpass Cosmic Microwave Background observations. I then focus on how already from the current data of the BOSS galaxy survey it is possible to put the first constraints from the large-scale structure of the universe on single-field inflation, and on the recent efforts in learning about the properties (mass, spin, speed of propagation) of light degrees of freedom during inflation, especially in light of recent measurements of the 4-point function of BOSS galaxies and recent developments in the "Cosmological Bootstrap" program, which aims at using the fundamental principles of locality and unitarity to compute the impact of these degrees of freedom on inflationary observables.