Neutrino-antineutrino asymmetry in the early universe
Abstract
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.
- Publication:
-
arXiv e-prints
- Pub Date:
- December 1996
- DOI:
- 10.48550/arXiv.hep-ph/9612392
- arXiv:
- arXiv:hep-ph/9612392
- Bibcode:
- 1996hep.ph...12392V
- Keywords:
-
- High Energy Physics - Phenomenology
- E-Print:
- 5 pages, LaTeX, uses sprocl.sty. Talk given at XVII Conference on Neutrino Physics and Astrophysics, Helsinki, June 1996