Speaker
Laura Herold
Description
The DESI galaxy survey has recently placed the tightest constraint on the sum of neutrino masses to date. For such effects “below the detection limit”, where data can only infer upper bounds, Bayesian and frequentist methods can give important complementary information. I will begin with a short overview of the frequentist profile-likelihood method, its advantages and limitations. Using a frequentist and Bayesian toolbox, I will discuss neutrino mass constraints and the tentative evidence for evolving dark energy from recent DESI data.