Single-particle widths induced by axially symmetric vibrations in extended fermion matter

We examine the single-particle widths in extended fermion matter originated in the coupling to a harmonic vibration that presents axial symmetry. This is a primary model for the broadening in the nucleon spectrum in an axially symmetric nucleus where a giant collective mode becomes excited. We resor...

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Autores principales: Kievsky, Alejandro, Hernández, Ester Susana
Publicado: 1986
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03784371_v139_n1_p149_Kievsky
http://hdl.handle.net/20.500.12110/paper_03784371_v139_n1_p149_Kievsky
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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_03784371_v139_n1_p149_Kievsky2023-06-08T15:39:47Z Single-particle widths induced by axially symmetric vibrations in extended fermion matter Kievsky, Alejandro Hernández, Ester Susana We examine the single-particle widths in extended fermion matter originated in the coupling to a harmonic vibration that presents axial symmetry. This is a primary model for the broadening in the nucleon spectrum in an axially symmetric nucleus where a giant collective mode becomes excited. We resort to the Quantal Brownian Motion model of the coupled dynamics of collective and intrinsic degrees of freedom in fermion systems and propose a modified kinetic equation for the particle density operator. This equation is solved in the relaxation time approximation from where the single-particle widths are extracted as the collision rates in the fermionic environment. The geometry and dynamics of the collisions are analyzed, as well as the relevance of those sources of energy spread other than the interaction between the particles and the oscillation, such as the temperature and the inelasticity parameter. © 1986. Fil:Kievsky, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Hernández, E.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1986 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03784371_v139_n1_p149_Kievsky http://hdl.handle.net/20.500.12110/paper_03784371_v139_n1_p149_Kievsky
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 examine the single-particle widths in extended fermion matter originated in the coupling to a harmonic vibration that presents axial symmetry. This is a primary model for the broadening in the nucleon spectrum in an axially symmetric nucleus where a giant collective mode becomes excited. We resort to the Quantal Brownian Motion model of the coupled dynamics of collective and intrinsic degrees of freedom in fermion systems and propose a modified kinetic equation for the particle density operator. This equation is solved in the relaxation time approximation from where the single-particle widths are extracted as the collision rates in the fermionic environment. The geometry and dynamics of the collisions are analyzed, as well as the relevance of those sources of energy spread other than the interaction between the particles and the oscillation, such as the temperature and the inelasticity parameter. © 1986.
author Kievsky, Alejandro
Hernández, Ester Susana
spellingShingle Kievsky, Alejandro
Hernández, Ester Susana
Single-particle widths induced by axially symmetric vibrations in extended fermion matter
author_facet Kievsky, Alejandro
Hernández, Ester Susana
author_sort Kievsky, Alejandro
title Single-particle widths induced by axially symmetric vibrations in extended fermion matter
title_short Single-particle widths induced by axially symmetric vibrations in extended fermion matter
title_full Single-particle widths induced by axially symmetric vibrations in extended fermion matter
title_fullStr Single-particle widths induced by axially symmetric vibrations in extended fermion matter
title_full_unstemmed Single-particle widths induced by axially symmetric vibrations in extended fermion matter
title_sort single-particle widths induced by axially symmetric vibrations in extended fermion matter
publishDate 1986
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03784371_v139_n1_p149_Kievsky
http://hdl.handle.net/20.500.12110/paper_03784371_v139_n1_p149_Kievsky
work_keys_str_mv AT kievskyalejandro singleparticlewidthsinducedbyaxiallysymmetricvibrationsinextendedfermionmatter
AT hernandezestersusana singleparticlewidthsinducedbyaxiallysymmetricvibrationsinextendedfermionmatter
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