No nus is good newsConfirmed

by Daniel Green (University of California, San Diego)

Wednesday Nov 20, 2024, 2:00 p.m. → 3:30 p.m. America/Toronto

PI/2-292 - Time Room (Perimeter Institute for Theoretical Physics)

Cosmic surveys offer a unique window into fundamental physics, particularly the physics of light particles such as neutrinos. As a striking example, the recent results from the Dark Energy Spectroscopic Instrument (DESI) have placed surprisingly stringent constraints on the sum of neutrino masses, nearly excluding the entire range of masses consistent with neutrino oscillation measurements. In this colloquium, I will review what we have learned about cosmic neutrinos from maps of the universe. I will then discuss this confusing situation, the status possible explanations for the current data, and the implications for Beyond the Standard Model physics.