Neutrino Trapping in a Supernova and Ion Screening

  title={Neutrino Trapping in a Supernova and Ion Screening},
  author={C. J. Horowitz},
Neutrino-nucleus elastic scattering is reduced in dense matter because of correlations between ions. The static structure factor for a plasma of electrons and ions is calculated from Monte Carlo simulations and parameterized with a least squares fit. Our results imply a large increase in the neutrino mean free path. This strongly limits the trapping of neutrinos in a supernova by coherent neutral current interactions. 

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Parameters βij from a least squares fit of the angle averaged static structure factor < S >, see text. Coeff. j = 1 2 3 4 β3j -7.362056

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