Neutrino oscillations in the early universe. Resonant case

Details Neutrino oscillations in the early universe. Resonant case Neutrino oscillations in the early universe. Resonant case

2001-02-10

arxiv.org/abs/hep-ph/0102125v1

Nucl.Phys. B610 (2001) 411-429

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, latex

Scientific paper

10.1016/S0550-3213(01)00323-6

Lepton asymmetry generated in the early universe by neutrino oscillations into sterile partners is calculated. Kinetic equations are analytically reduced to a simple form that permits an easy numerical treatment. Asymptotic values of the asymmetry are at the level of 0.2-0.3 and are reasonably close to those obtained by other groups, though the approach to asymptotics in some cases is noticeably slower. No chaoticity is observed.

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