Dark interactions of neutrinos in the early universe

by Xunjie Xu (IHEP)

Thursday 17 Feb 2022, 16:00 → 17:00 Australia/Sydney

Neutrinos are often considered as the portal of new physics beyond the SM hence they might interact secretly with new dark particles. In this talk, I will discuss some interesting roles of such dark interactions of neutrinos in the early universe, including their influence on the effective number of relativistic neutrino species Neff, the possibility of dark matter frozen in from neutrinos, and observable effects on the cosmic neutrino background.

Talk based on 2110.09883, 2011.13059 , 2005.01629