Neutrino-antineutrino asymmetry in the early universe
Abstract
Description
In this talk I discuss the use of a relic neutrino-antineutrino asymmetry in suppressing active-sterile neutrino oscillations in the early universe. This phenomenon can serve to greatly loosen the well known Big Bang Nucleosynthesis constraints on active-sterile neutrino mixing, and is thus important in some proposed solutions to the solar and atmospheric neutrino anomalies which employ large-angle active-sterile mixing. I first discuss the necessary conditions for the survival of a pre-existing neutrino asymmetry. I then consider the much more interesting phenomenon whereby such an asymmetry can actually be created by active-sterile neutrino oscillations.
5 pages, LaTeX, uses sprocl.sty. Talk given at XVII Conference on Neutrino Physics and Astrophysics, Helsinki, June 1996; to appear in the Proceedings
5 pages, LaTeX, uses sprocl.sty. Talk given at XVII Conference on Neutrino Physics and Astrophysics, Helsinki, June 1996; to appear in the Proceedings