Active-sterile neutrino oscillations in the early Universe and the atmospheric neutrino anomaly

Details Active-sterile neutrino oscillations in the early Universe and the atmospheric neutrino anomaly Active-sterile neutrino oscillations in the early Universe and the atmospheric neutrino anomaly

2000-02-02

arxiv.org/abs/hep-ph/0002031v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 embedded figures, Latex, uses ws-p8-50x6-00.cls. Talk at COSMO99, to appear in the proceedings

Scientific paper

Cosmology cannot rule out the solution nu_mu <-> nu_s to the atmospheric neutrino data and thus only Earth experiments will be able to give a definitive answer. This conclusion holds when a generation of lepton number is taken into account and one assumes that the sterile neutrino is also slightly mixed with an eV-tau neutrino. This result cannot be spoiled by a chaotic generation of lepton domains.

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