Reconciling Neutrino Mass Bounds with Strongly Self-Interacting Dark Radiation

by 暘 高 (南方科技大学)

Wednesday 10 Dec 2025, 15:00 → 17:00 Asia/Shanghai

图书馆楼319

摘要：Cosmological measurements have dramatically improved, with recent constraints on neutrino masses (Σmν < 0.0642 eV from Planck + DESI-II BAO) approaching the lower bounds required by neutrino oscillation experiments. While not yet in tension for normal hierarchy, the viable parameter space is rapidly shrinking. Simultaneously, cosmological data shows preference for strongly self-interacting neutrinos—a property severely constrained by laboratory experiments. We present a mechanism exploiting cosmology's inability to distinguish between neutrinos and similarly-behaving dark radiation, potentially addressing this narrowing gap and other cosmological puzzles.

个人简介：Dr. Christina (Yang) Gao is an assistant professor at the Southern University of Science and Technology. Her reseach interest focuses on the direct detection of dark matter and the search for physics beyond the Standard Model. She received her Ph.D. from UC Davis after completing her undergraduate and master's studies at the University of Oxford. Prior to joining SUSTech, she conducted postdoctoral research at the University of Illinois Urbana-Champaign and Fermi National Accelerator Laboratory (Fermilab).