Momentum distribution in nuclear matter within a perturbation approximation

It is shown that the norm corrections, introduced to avoid the violation of the constraints on the depletion of the hole states in the standard perturbative 2p2h approach, leads in nuclear matter to a dependence of the momentum distribution with the total nucleon number. This unphysical behavior, wh...

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Detalles Bibliográficos
Autores principales: Mariano, Alejandro Edgardo, Krmpotic, Francisco, Toledo Piza, A. F. R. de
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 1996
Materias:
Física
Hartree–Fock method
Physics
Nuclear matter
Nucleon
Perturbation theory (quantum mechanics)
Quantum electrodynamics
Fermi level
Momentum
Ground state
Mass number
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/122852
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-122852
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Hartree–Fock method
Physics
Nuclear matter
Nucleon
Perturbation theory (quantum mechanics)
Quantum electrodynamics
Fermi level
Momentum
Ground state
Mass number
spellingShingle Física
Hartree–Fock method
Physics
Nuclear matter
Nucleon
Perturbation theory (quantum mechanics)
Quantum electrodynamics
Fermi level
Momentum
Ground state
Mass number
Mariano, Alejandro Edgardo
Krmpotic, Francisco
Toledo Piza, A. F. R. de
Momentum distribution in nuclear matter within a perturbation approximation
topic_facet Física
Hartree–Fock method
Physics
Nuclear matter
Nucleon
Perturbation theory (quantum mechanics)
Quantum electrodynamics
Fermi level
Momentum
Ground state
Mass number
description It is shown that the norm corrections, introduced to avoid the violation of the constraints on the depletion of the hole states in the standard perturbative 2p2h approach, leads in nuclear matter to a dependence of the momentum distribution with the total nucleon number. This unphysical behavior, which in turn makes the depletion to be nonextensive, arises from contributions of disconnected diagrams contained in the norm. It is found that the extensivity is again recovered when the 4p4h excitations in the ground state are included, and a reasonable value for the total number of nucleons promoted above the Fermi level is obtained.
format Articulo
Preprint
author Mariano, Alejandro Edgardo
Krmpotic, Francisco
Toledo Piza, A. F. R. de
author_facet Mariano, Alejandro Edgardo
Krmpotic, Francisco
Toledo Piza, A. F. R. de
author_sort Mariano, Alejandro Edgardo
title Momentum distribution in nuclear matter within a perturbation approximation
title_short Momentum distribution in nuclear matter within a perturbation approximation
title_full Momentum distribution in nuclear matter within a perturbation approximation
title_fullStr Momentum distribution in nuclear matter within a perturbation approximation
title_full_unstemmed Momentum distribution in nuclear matter within a perturbation approximation
title_sort momentum distribution in nuclear matter within a perturbation approximation
publishDate 1996
url http://sedici.unlp.edu.ar/handle/10915/122852
work_keys_str_mv AT marianoalejandroedgardo momentumdistributioninnuclearmatterwithinaperturbationapproximation
AT krmpoticfrancisco momentumdistributioninnuclearmatterwithinaperturbationapproximation
AT toledopizaafrde momentumdistributioninnuclearmatterwithinaperturbationapproximation
bdutipo_str Repositorios
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