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Effets du milieu sur la propagation des neutrinos dans la matiere nucleaire

We study the elementary interactions between neutrinos and dense matter in a proroneutron star. Equations of state obtained with different nuclear effective interactions (skyrme, Gogny, relativistic Lagrangians) are first discussed.Then we characterize their stability in spin and isospin. We derive...

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Autor principal: Margueron, J
Lenguaje:eng
Publicado: 2001
Materias:
Acceso en línea:http://cds.cern.ch/record/522895
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author Margueron, J
author_facet Margueron, J
author_sort Margueron, J
collection CERN
description We study the elementary interactions between neutrinos and dense matter in a proroneutron star. Equations of state obtained with different nuclear effective interactions (skyrme, Gogny, relativistic Lagrangians) are first discussed.Then we characterize their stability in spin and isospin. We derive magnetic susceptibilities for all isospin asymmetry values as a function of Landau parameters G^{tau tau'}_0 (where tau, tau' = proton or neutron)We calculate nthe pure neutron matter response functions with and withoutcharge exchange, describing nuclear correlations in both approaches : non-relativistic and relativistic. At the end we calculate neutrino mean free paths for neutral current and charged current reactions.Comparisons between relativistic and non-relativistic approaches allow us to identify relativistic effects in nuclear matter at densities as low as twice the saturation density.RPA correlations make the medium more transparent to neutrinos compared to free Fermi gas.
id cern-522895
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2001
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spelling cern-5228952019-09-30T06:29:59Zhttp://cds.cern.ch/record/522895engMargueron, JEffets du milieu sur la propagation des neutrinos dans la matiere nucleaireNuclear PhysicsWe study the elementary interactions between neutrinos and dense matter in a proroneutron star. Equations of state obtained with different nuclear effective interactions (skyrme, Gogny, relativistic Lagrangians) are first discussed.Then we characterize their stability in spin and isospin. We derive magnetic susceptibilities for all isospin asymmetry values as a function of Landau parameters G^{tau tau'}_0 (where tau, tau' = proton or neutron)We calculate nthe pure neutron matter response functions with and withoutcharge exchange, describing nuclear correlations in both approaches : non-relativistic and relativistic. At the end we calculate neutrino mean free paths for neutral current and charged current reactions.Comparisons between relativistic and non-relativistic approaches allow us to identify relativistic effects in nuclear matter at densities as low as twice the saturation density.RPA correlations make the medium more transparent to neutrinos compared to free Fermi gas.EXT-2001-056IPNO-T-2001-07oai:cds.cern.ch:5228952001-07-03
spellingShingle Nuclear Physics
Margueron, J
Effets du milieu sur la propagation des neutrinos dans la matiere nucleaire
title Effets du milieu sur la propagation des neutrinos dans la matiere nucleaire
title_full Effets du milieu sur la propagation des neutrinos dans la matiere nucleaire
title_fullStr Effets du milieu sur la propagation des neutrinos dans la matiere nucleaire
title_full_unstemmed Effets du milieu sur la propagation des neutrinos dans la matiere nucleaire
title_short Effets du milieu sur la propagation des neutrinos dans la matiere nucleaire
title_sort effets du milieu sur la propagation des neutrinos dans la matiere nucleaire
topic Nuclear Physics
url http://cds.cern.ch/record/522895
work_keys_str_mv AT margueronj effetsdumilieusurlapropagationdesneutrinosdanslamatierenucleaire