Neutrino Oscillations in the Early Universe with Nonequilibrium Neutrino Distributions

Details Neutrino Oscillations in the Early Universe with Nonequilibrium Neutrino Distributions Neutrino Oscillations in the Early Universe with Nonequilibrium Neutrino Distributions

1995-07-26

arxiv.org/abs/hep-ph/9507427v1

Phys.Rev.D52:3184-3201,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

accepted for publication in Physical Review D

Scientific paper

10.1103/PhysRevD.52.3184

Around one second after the big bang, neutrino decoupling and $e^+$-$e^-$
annihilation distort the Fermi-Dirac spectrum of neutrino energies. Assuming
neutrinos have masses and can mix, we compute the distortions using
nonequilibrium thermodynamics and the Boltzmann equation. The flavor behavior
of neutrinos is studied during and following the generation of the distortion.

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