Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-01-11
Phys.Rev.C58:554-571,1998
Astronomy and Astrophysics
Astrophysics
39 pages, APS REVTeX format, 11 PostScript figures, submitted to Physical Rev. D
Scientific paper
10.1103/PhysRevC.58.554
Including nucleon-nucleon correlations due to both Fermi statistics and nuclear forces, we have developed a general formalism for calculating the neutral-current neutrino-nucleon opacities in nuclear matter. We derive corrections to the dynamic structure factors due to both density and spin correlations and find that neutrino-nucleon cross sections are suppressed by large factors around and above nuclear density. In addition, we find that the spectrum of energy transfers in neutrino scattering is considerably broadened by the interactions in the medium. An identifiable component of this broadening comes from the absorption and emission of quanta of collective modes akin to the Gamow-Teller and Giant Dipole resonances in nuclei (zero-sound; spin waves), with \v{C}erenkov kinematics. Under the assumption that both the charged-current and the neutral-current cross sections are decreased by many-body effects, we calculate a set of ad hoc protoneutron star cooling models to gauge the potential importance of the new opacities to the supernova itself. We find that after many hundreds of milliseconds to seconds the driving neutrino luminosities might be increased by from 10% to 100%. However, the actual consequences, if any, of these new neutrino opacities remain to be determined.
Burrows Adam
Sawyer Raymond F.
No associations
LandOfFree
The Effects of Correlations on Neutrino Opacities in Nuclear Matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Effects of Correlations on Neutrino Opacities in Nuclear Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Effects of Correlations on Neutrino Opacities in Nuclear Matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-590751