Speaker
Description
Cosmological observations provide powerful constraints on the neutrino mass that are complementary to terrestrial laboratory experiments. In this talk, I will survey current constraints from cosmology, with a focus on the latest measurements from DESI and CMB experiments, which have now reached a level of precision at which the inferred neutrino masses are below the lower limits derived from neutrino oscillations. After reviewing the status of this tension, I will turn to the spectrum of possible resolutions, which include new interactions in the neutrino sector and alternative models of dark energy. Other approaches will be covered that can constrain the neutrino mass independently of the CMB. I will close with prospects for further improvements enabled by surveys like Euclid, LSST, and DESI-II.