Supernova matter at subnuclear densities as a resonant Fermi gas: Enhancement of neutrino rates

Abstract

At low energies nucleon-nucleon interactions are resonant and therefore supernova matter at subnuclear densities has many similarities to atomic gases with interactions dominated by a Feshbach resonance. We calculate the rates of neutrino processes involving nucleon-nucleon collisions and show that these are enhanced in mixtures of neutrons and protons at subnuclear densities due to the large scattering lengths. As a result, the rate for neutrino pair bremsstrahlung and absorption is significantly larger below 10^{13} g cm^{-3} compared to rates used in supernova simulations.

5 pages, 4 figures, published version, NORDITA-2014-28

References in corpus (5)

• Explosion Mechanisms of Core-Collapse Supernovae
• Neutron matter from chiral effective field theory interactions
• Influence of light nuclei on neutrino-driven supernova outflows
• Chiral effective field theory calculations of neutrino processes in dense matter
• Unified approach to structure factors and neutrino processes in nucleon matter

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