[Cosmology seminar] Neutrinos as a cosmological lodestar

Recent years have witnessed remarkable progress in high-precision cosmology. This increase in precision has revealed a growing number of anomalies and discrepancies between cosmological datasets. I will report on a new tension that has emerged in the last two years, involving cosmological measurements of the sum of neutrino masses. Unlike other cosmological tensions, this discrepancy is between cosmological datasets and known experimental bounds from particle physics, which provide a concrete target that lies within reach of current and forthcoming surveys. I will present the latest results and discuss the potential implications for cosmology and particle physics.