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Stellar Collapse Dynamics With Neutrino Flavor Changing Neutral Currents

Philip S. Amanik·George M. Fuller
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Abstract

We perform one-zone simulations of the infall epoch of a pre-supernova stellar core in the presence of neutrino flavor changing scattering interactions. Our calculations give a self-consistent assessment of the relationship between flavor changing rates and the reduction in electron fraction and re-distribution of initial electron lepton number among the neutrino flavors. We discuss and include in our calculations sub-nuclear density medium corrections for flavor changing scattering coherence factors. We find that flavor changing couplings epsilon > 3x10^(-4) in either the electron neutrino - muon neutrino or electron neutrino - tau neutrino channels result in a dynamically significant reduction in core electron fraction relatively soon after neutrino trapping and well before the core reaches nuclear matter density.

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Philip S. Amanik, George M. Fuller. 2007-05-30. Stellar Collapse Dynamics With Neutrino Flavor Changing Neutral Currents. https://doi.org/10.1103/physrevd.75.083008

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