Nonequilibrium Neutrino Oscillations in the Early Universe with an Inverted Neutrino-Mass Hierarchy

Details Nonequilibrium Neutrino Oscillations in the Early Universe with an Inverted Neutrino-Mass Hierarchy Nonequilibrium Neutrino Oscillations in the Early Universe with an Inverted Neutrino-Mass Hierarchy

1996-10-17

arxiv.org/abs/hep-ph/9610399v2

Phys.Lett.B385:159-168,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages in Latex with 6 figures (10 postscript files)

Scientific paper

10.1016/0370-2693(96)00856-8

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.

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