Speaker
Description
The current spectroscopic surveys DESI and Euclid are enabling a very precise measurement of the matter power spectrum and bispectrum on a vast range of scales. I will discuss how we can improve accuracy by using the FreePower methodology, which analyzes the mildly non-linear scales of the LSS data without the need to make any model assumptions on the physics of recombination or the nature of dark energy. This new approach relies instead only on the consistency between the Alcock-Paczynski effect and the multipole configuration of the redshift space distortions. Even though it relies only on these loose assumptions, it can provide surprisingly tight constraints. I will show new developments on this method and real data results for the growth-rate, expansion rate and cosmological distances using DESI and BOSS. Finally, I will discuss their dependency on the choice of priors, and how FreePower could help resolve the issue of the cosmological tensions.