PIRSA ID: https://pirsa.org/24110064
Series: Colloquium
Event Type: Seminar
Scientific Area(s): Other
Speaker(s): Daniel Green University of California San Diego
Event Link: https://events.perimeterinstitute.ca/e/854
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.