The BOSS bispectrum analysis at one loop from the Effective Field Theory of Large-Scale Structure

In this talk, I will discuss our recent analyses of the BOSS galaxy-clustering power spectrum and bispectrum data using the one-loop predictions from the Effective Field Theory of Large-Scale Structure (EFTofLSS), where we find impressive constraints on cosmological parameters, including primordial non-Gaussianity. After reviewing the theoretical underpinnings of the EFTofLSS, which allows for a controlled and consistent perturbative expansion of cosmological observables on large scales, I will describe our results. Overall, we find that including higher-order predictions, which allows us to analyze the data to smaller length scales and access more physical modes, significantly reduces the error bars of cosmological parameters. Even with this existing BOSS data, some of our results are competitive with CMB constraints. This points to exciting, even stronger constraints from future surveys such as DESI, Euclid, and MegaMapper. I will also discuss some new theoretical developments, including signals that allow us to directly measure the formation time of galaxies.