2008/08/31 by G. I. Lykasov, C. J. Pethick, A. Schwenk · 1 citation
Physics and Astronomy · #Nuclear physics research studies #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #astro-ph #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevc.78.045803
published as Phys.Rev.C78:045803,2008 · 16 pages, 4 figures; NORDITA-2008-30; published version
arxiv created 2008/10/22 · openalex publication_date 2008/10/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We present a unified approach to neutrino processes in nucleon matter based on Landau's theory of Fermi liquids that includes one and two quasiparticle-quasihole pair states as well as mean-field effects. We show how rates of neutrino processes involving two nucleons may be calculated in terms of the collision integral in the Landau transport equation for quasiparticles. Using a relaxation time approximation, we solve the transport equation for density and spin-density fluctuations and derive a general form for the response functions. We apply our approach to neutral-current processes in neutron matter, where the spin response function is crucial to the calculation of neutrino elastic and inelastic scattering and neutrino-pair bremsstrahlung and absorption from strongly interacting nucleons. We calculate the relaxation rates using modern nuclear interactions and including many-body contributions, and find that rates of neutrino processes are reduced compared with estimates based on the one-pion exchange interaction, which is used in current simulations of core-collapse supernovae.