Chiral effective field theory calculations of neutrino processes in dense matter
| Autor: | Christopher J. Pethick, Sonia Bacca, K. Hally, Achim Schwenk |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Nuclear and High Energy Physics
Particle physics Nuclear Theory FOS: Physical sciences Astrophysics 7. Clean energy 01 natural sciences Nuclear Theory (nucl-th) Many-body problem Nuclear physics High Energy Physics - Phenomenology (hep-ph) Recoil 0103 physical sciences Effective field theory Nuclear Experiment 010306 general physics Spin-½ Physics 010308 nuclear & particles physics Scattering Astrophysics (astro-ph) Bremsstrahlung High Energy Physics - Phenomenology Neutrino Nucleon |
| Zdroj: | Physical Review C. 80 |
| ISSN: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.80.032802 |
| Popis: | We calculate neutrino processes involving two nucleons at subnuclear densities using chiral effective field theory. Shorter-range noncentral forces reduce the neutrino rates significantly compared with the one-pion exchange approximation currently used in supernova simulations. For densities rho < 10^{14} g cm^{-3}, we find that neutrino rates are well constrained by nuclear interactions and nucleon-nucleon scattering data. As an application, we calculate the mean-square energy transfer in scattering of a neutrino from nucleons and find that collision processes and spin-dependent mean-field effects dominate over the energy transfer due to nucleon recoil. 5 pages, 3 figures; NORDITA-2008-57; minor changes and additions, added results for the energy transfer in neutrino scattering, to appear as Rapid. Comm. in Phys. Rev. C |
| Databáze: | OpenAIRE |
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