Neutrino oscillations in the early universe

Details Neutrino oscillations in the early universe Neutrino oscillations in the early universe

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991nuphb.349..743b&link_type=abstract

Nuclear Physics B, Volume 349, Issue 3, p. 743-753.

Physics

Nuclear Physics

136

Scientific paper

We study the possible distortions of the evolution of the early universe caused by the oscillations of a standard neutrino (νc, νμ or ντ) into a light ``sterile'' neutrino state, a gauge group singlet νs. The effects on the standard big bang nucleosynthesis are considered in the full space of the mixing parameters (δm2 sin 2θ). A significant portion of this parameter space is thereby excluded, or at least made highly improbable.

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