Unified approach to structure factors and neutrino processes in nucleon matter

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dc.creatorLykasov, G. I.
dc.creatorPethick, C. J.
dc.creatorSchwenk, A.
dc.date2008-08-03
dc.date2008-10-22
dc.date.accessioned2026-07-07T11:45:18Z
dc.date.available2026-07-07T11:45:18Z
dc.descriptionWe 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 for calculations of neutrino elastic and inelastic scattering, 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.
dc.description16 pages, 4 figures; NORDITA-2008-30; published version
dc.identifierhttps://arxiv.org/abs/0808.0330
dc.identifierhttp://arxiv.org/abs/0808.0330
dc.identifierPhys.Rev.C78:045803,2008
dc.identifierdoi:10.1103/PhysRevC.78.045803
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201832
dc.subjectNuclear Theory
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleUnified approach to structure factors and neutrino processes in nucleon matter
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