Neutrino asymmetry generation in the early Universe (from active-sterile neutrino oscillations)

Abstract

Neutrino asymmetry generation from active-sterile neutrino oscillations in the early Universe has different important cosmological effects. We discuss its basic features and present recent results on the borders of the generation for mixing angles ${\sin }^{2}2{\theta }_0\le 10^{-7}$.

4 pages, 2 figures, to be published in the proceedings of XXXVI th Rencontres de Moriond Electroweak Interactions and Unified Theories