Diagonal and off-diagonal density fluctuations in hot nuclear matter, and applications to neutrino transport in supernovae

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Neutrinos, Nuclear Astrophysics, Plasma Density, Supernovae, Correlation, Density (Mass/Volume), Transport Properties

Scientific paper

The effects of interactions on the density fluctuations of an n, p, e plasma are calculated. The scattering of neutrinos arising from the Fermi part of the neutral current interactions with protons, under supernova conditions, is practically extinguished by Coulomb effects in the plasma. Charged-current reactions are discussed in terms of off-diagonal density fluctuations. Inclusion of the symmetry energy term in the nuclear interaction gives rise to a large reduction in the Fermi part of the cross section for nu + n yields e(-) + p.

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