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Nonequilibrium neutrino oscillations in the early Universe with an inverted neutrino-mass hierarchy
1996
Physics Letters B
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The annihilation of electron-positron pairs around one second after the big bang distorts the Fermi-Dirac spectrum of neutrino energies. We determine the distortions assuming neutrino mixing with an inverted neutrino-mass hierarchy. Nonequilibrium thermodynamics, the Boltzmann equation, and numerical integration are used to achieve the results. The various types of neutrino behavior are established as a function of masses and mixing angles.
doi:10.1016/0370-2693(96)00856-8
fatcat:eodyikt5xfd37nxaf3amq323ty