Neutrino-pair bremsstrahlung from nucleon-$\alpha$ versus nucleon-nucleon scattering

Abstract

We study the impact of the nucleon-$\alpha$ P-wave resonances on neutrino-pair bremsstrahlung. Because of the non-central spin-orbit interaction, these resonances lead to an enhanced contribution to the nucleon spin structure factor for temperatures $T\lesssim 4$ MeV. If the $\alpha$-particle fraction is significant and the temperature is in this range, this contribution is competitive with neutron-neutron bremsstrahlung. This may be relevant for neutrino production in core-collapse supernovae or other dense astrophysical environments. Similar enhancements are expected for resonant non-central nucleon-nucleus interactions.

6 pages, 4 figures

References in corpus (5)

• Theory of Core-Collapse Supernovae
• Quantum Monte Carlo calculations of neutron-alpha scattering
• 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

Cited by in corpus (2)

• Neutrino-nucleon scattering in supernova matter from the virial expansion
• Neutrino scattering in supernovae and spin correlations of a unitary gas