Neutrino Flavor Conversion in a Supernova Core

Details Neutrino Flavor Conversion in a Supernova Core Neutrino Flavor Conversion in a Supernova Core

1992-09-24

arxiv.org/abs/astro-ph/9209005v1

Astropart.Phys. 1 (1993) 165-184

Astronomy and Astrophysics

Astrophysics

24 pages, 3 figures from authors upon request, LaTeX, MPI-Ph/92-68

Scientific paper

10.1016/0927-6505(93)90020-E

If $\nu_\mu$ or $\nu_\tau$ mix with $\nu_e$, neutrino oscillations and collisions in a supernova (SN) core allow these flavors effectively to participate in $\beta$ equilibrium and thus to obtain a large chemical potential. If a sterile species mixes with $\nu_e$, these effects lead to an anomalous loss of energy and lepton number. We study flavor conversion in a SN core on the basis of a new kinetic equation which rigorously includes neutrino interference and degeneneracy effects. Our discussion serves as an example and illustration of the properties of this ``non-abelian Boltzmann equation''.

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