Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions

We present microscopic calculations of neutrino propagation in hot neutron matter above the nuclear density within the framework of the random phase approximation. Calculations are performed for nondegenerate neutrinos using various Skyrme effective interactions. We find that for densities just abov...

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Publicado: 1999
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v60_n4_p458011_Navarro
http://hdl.handle.net/20.500.12110/paper_05562813_v60_n4_p458011_Navarro
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_05562813_v60_n4_p458011_Navarro2023-06-08T15:41:48Z Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions We present microscopic calculations of neutrino propagation in hot neutron matter above the nuclear density within the framework of the random phase approximation. Calculations are performed for nondegenerate neutrinos using various Skyrme effective interactions. We find that for densities just above the nuclear density, spin zero sound is present at zero temperature for all Skyrme forces considered. However, it disappears rapidly with increasing temperature due to a strong Landau damping. As a result the mean free path is given, to a good approximation, by the mean field value. Because of the renormalization of the bare mass in the mean field, the medium is more transparent as compared to the free case. We find, in contrast, that at several times the nuclear density, a new type of behavior sets in due to the vicinity of a magnetic instability. It produces a strong reduction of the mean free path. The corresponding transition density, however, occurs in a region where inputs from more realistic calculations are necessary for the construction of a reliable Skyrme-type parametrization. 1999 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v60_n4_p458011_Navarro http://hdl.handle.net/20.500.12110/paper_05562813_v60_n4_p458011_Navarro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We present microscopic calculations of neutrino propagation in hot neutron matter above the nuclear density within the framework of the random phase approximation. Calculations are performed for nondegenerate neutrinos using various Skyrme effective interactions. We find that for densities just above the nuclear density, spin zero sound is present at zero temperature for all Skyrme forces considered. However, it disappears rapidly with increasing temperature due to a strong Landau damping. As a result the mean free path is given, to a good approximation, by the mean field value. Because of the renormalization of the bare mass in the mean field, the medium is more transparent as compared to the free case. We find, in contrast, that at several times the nuclear density, a new type of behavior sets in due to the vicinity of a magnetic instability. It produces a strong reduction of the mean free path. The corresponding transition density, however, occurs in a region where inputs from more realistic calculations are necessary for the construction of a reliable Skyrme-type parametrization.
title Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions
spellingShingle Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions
title_short Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions
title_full Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions
title_fullStr Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions
title_full_unstemmed Neutrino propagation and spin zero sound in hot neutron matter with Skyrme interactions
title_sort neutrino propagation and spin zero sound in hot neutron matter with skyrme interactions
publishDate 1999
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v60_n4_p458011_Navarro
http://hdl.handle.net/20.500.12110/paper_05562813_v60_n4_p458011_Navarro
_version_ 1768545882791215104

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