Cosmology seminar: An Unofficial BOSS Analysis: Cosmology from the Galaxy Power Spectrum, Bispectrum, and Trispectrum

Spectroscopic surveys are generally used to constrain cosmology through the Baryon Acoustic Oscillation signature, often in combination with the CMB. However, their utility extends far further: thanks to recent theoretical developments, we can now place direct constraints on cosmological models (both in ΛCDM and beyond) using the full-shape of the galaxy power spectrum, bispectrum and beyond. Such analyses become increasingly useful as the volume of survey data increases; by the end of the decade, spectroscopic surveys will give the tightest constraints on many fundamental parameters.

In this talk, I will present the current status of the field, discussing a number of recent constraints obtained from the analysis of SDSS data in conjunction with a robust model, rooted in Effective Field Theory. In particular, I will show BOSS constraints on ΛCDM parameters, as well as direct measurements of primordial non-Gaussianity from the galaxy bispectrum. Finally, I will comment on recent claims of cosmological parity-violation and their implications for the primordial Universe.