Supernova Matter at Subnuclear Densities as a Resonant Fermi Gas: Enhancement of Neutrino Rates
2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 113, no 8, 081101- p.Article in journal (Refereed) Published
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.
IdentifiersURN: urn:nbn:se:su:diva-107804DOI: 10.1103/PhysRevLett.113.081101ISI: 000341247600002OAI: oai:DiVA.org:su-107804DiVA: diva2:752596