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Supernova Matter at Subnuclear Densities as a Resonant Fermi Gas: Enhancement of Neutrino Rates
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). University of Copenhagen, Denmark.
2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 113, no 8, 081101- p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2014. Vol. 113, no 8, 081101- p.
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-107804DOI: 10.1103/PhysRevLett.113.081101ISI: 000341247600002OAI: diva2:752596


Available from: 2014-10-05 Created: 2014-09-29 Last updated: 2014-10-05Bibliographically approved

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