Neutrino oscillations and the leptonic charge of the universe

Details Neutrino oscillations and the leptonic charge of the universe Neutrino oscillations and the leptonic charge of the universe

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...368....1s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 368, Feb. 10, 1991, p. 1-11. Research supported by Lawrence Livermore Natio

Astronomy and Astrophysics

Astrophysics

34

Cosmology, Neutrinos, Nuclear Astrophysics, Universe, Adiabatic Conditions, Degenerate Matter, Leptons, Nuclear Fusion, Oscillations

Scientific paper

The most stringent bounds on the individual lepton numbers of the universe arise from considerations of primordial nucleosynthesis. The effect of resonant neutrino flavor oscillations on these limits is considered. In particular, the contributions from neutrino-neutrino forward scattering to the effective mass of each neutrino flavor are included. It is found that there can be significant modifications to the neutrino number densities and energy distributions for each flavor over a large range of neutrino vacuum masses and mixing angles. Modifications to the neutrino distributions occurring prior to the nucleosynthesis epoch can substantially alter the previously derived limits on the lepton number for each flavor and its associated degeneracy parameter.

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