Role of ground-state correlations in hypernuclear nonmesonic weak decay

Autores
Bauer, Eduardo; Garbarino, G.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The contribution of ground-state correlations (GSCs) to the nonmesonic weak decay of ¹²ΛC and other medium to heavy hypernuclei is studied within a nuclear-matter formalism implemented in a local-density approximation. We adopt a weak transition potential including the exchange of the complete octets of pseudoscalar and vector mesons, as well as a residual strong interaction modeled on the Bonn potential. Leading GSC contributions, at first order in the residual strong interaction, are introduced on the same footing for all isospin channels of one- and two-nucleon induced decays. Together with fermion antisymmetrization, GSCs turn out to be important for an accurate determination of the decay widths. Besides opening the two-nucleon stimulated decay channels, for ¹²ΛC GSCs are responsible for 14% of the rate Γ₁ while increasing the Γn / Γp ratio by 4 % . Our final results for ¹²ΛC are ΓNM = 0.98, Γn / Γp = 0.34 , and Γ₂ / ΓNM = 0.26 . The saturation property of Γ NM with increasing hypernuclear mass number is clearly observed. The agreement with data of our predictions for ΓNM, Γn / Γp , and Γ₂ is rather good.
Instituto de Física La Plata
Materia
Física
Elementary particle
Physics
Carbon-12
Nucleon
Atomic physics
Isospin
Hadron
Meson
Ground state
Mass number
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/126145
Acceder
id SEDICI_a4bc58c0009ff784a74877fff7a87b6b
oai_identifier_str oai:sedici.unlp.edu.ar:10915/126145
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Role of ground-state correlations in hypernuclear nonmesonic weak decayBauer, EduardoGarbarino, G.FísicaElementary particlePhysicsCarbon-12NucleonAtomic physicsIsospinHadronMesonGround stateMass numberThe contribution of ground-state correlations (GSCs) to the nonmesonic weak decay of ¹²<sub>Λ</sub>C and other medium to heavy hypernuclei is studied within a nuclear-matter formalism implemented in a local-density approximation. We adopt a weak transition potential including the exchange of the complete octets of pseudoscalar and vector mesons, as well as a residual strong interaction modeled on the Bonn potential. Leading GSC contributions, at first order in the residual strong interaction, are introduced on the same footing for all isospin channels of one- and two-nucleon induced decays. Together with fermion antisymmetrization, GSCs turn out to be important for an accurate determination of the decay widths. Besides opening the two-nucleon stimulated decay channels, for ¹²<sub>Λ</sub>C GSCs are responsible for 14% of the rate Γ₁ while increasing the Γ<sub>n</sub> / Γ<sub>p</sub> ratio by 4 % . Our final results for ¹²<sub>Λ</sub>C are Γ<sub>NM</sub> = 0.98, Γ<sub>n</sub> / Γ<sub>p</sub> = 0.34 , and Γ₂ / Γ<sub>NM</sub> = 0.26 . The saturation property of Γ NM with increasing hypernuclear mass number is clearly observed. The agreement with data of our predictions for Γ<sub>NM</sub>, Γ<sub>n</sub> / Γ<sub>p</sub> , and Γ₂ is rather good.Instituto de Física La Plata2010-06-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/126145enginfo:eu-repo/semantics/altIdentifier/issn/0556-2813info:eu-repo/semantics/altIdentifier/issn/1089-490Xinfo:eu-repo/semantics/altIdentifier/arxiv/0907.4199info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevc.81.064315info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:22:06Zoai:sedici.unlp.edu.ar:10915/126145Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:22:07.17SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Role of ground-state correlations in hypernuclear nonmesonic weak decay
title Role of ground-state correlations in hypernuclear nonmesonic weak decay
spellingShingle Role of ground-state correlations in hypernuclear nonmesonic weak decay
Bauer, Eduardo
Física
Elementary particle
Physics
Carbon-12
Nucleon
Atomic physics
Isospin
Hadron
Meson
Ground state
Mass number
title_short Role of ground-state correlations in hypernuclear nonmesonic weak decay
title_full Role of ground-state correlations in hypernuclear nonmesonic weak decay
title_fullStr Role of ground-state correlations in hypernuclear nonmesonic weak decay
title_full_unstemmed Role of ground-state correlations in hypernuclear nonmesonic weak decay
title_sort Role of ground-state correlations in hypernuclear nonmesonic weak decay
dc.creator.none.fl_str_mv Bauer, Eduardo
Garbarino, G.
author Bauer, Eduardo
author_facet Bauer, Eduardo
Garbarino, G.
author_role author
author2 Garbarino, G.
author2_role author
dc.subject.none.fl_str_mv Física
Elementary particle
Physics
Carbon-12
Nucleon
Atomic physics
Isospin
Hadron
Meson
Ground state
Mass number
topic Física
Elementary particle
Physics
Carbon-12
Nucleon
Atomic physics
Isospin
Hadron
Meson
Ground state
Mass number
dc.description.none.fl_txt_mv The contribution of ground-state correlations (GSCs) to the nonmesonic weak decay of ¹²<sub>Λ</sub>C and other medium to heavy hypernuclei is studied within a nuclear-matter formalism implemented in a local-density approximation. We adopt a weak transition potential including the exchange of the complete octets of pseudoscalar and vector mesons, as well as a residual strong interaction modeled on the Bonn potential. Leading GSC contributions, at first order in the residual strong interaction, are introduced on the same footing for all isospin channels of one- and two-nucleon induced decays. Together with fermion antisymmetrization, GSCs turn out to be important for an accurate determination of the decay widths. Besides opening the two-nucleon stimulated decay channels, for ¹²<sub>Λ</sub>C GSCs are responsible for 14% of the rate Γ₁ while increasing the Γ<sub>n</sub> / Γ<sub>p</sub> ratio by 4 % . Our final results for ¹²<sub>Λ</sub>C are Γ<sub>NM</sub> = 0.98, Γ<sub>n</sub> / Γ<sub>p</sub> = 0.34 , and Γ₂ / Γ<sub>NM</sub> = 0.26 . The saturation property of Γ NM with increasing hypernuclear mass number is clearly observed. The agreement with data of our predictions for Γ<sub>NM</sub>, Γ<sub>n</sub> / Γ<sub>p</sub> , and Γ₂ is rather good.
Instituto de Física La Plata
description The contribution of ground-state correlations (GSCs) to the nonmesonic weak decay of ¹²<sub>Λ</sub>C and other medium to heavy hypernuclei is studied within a nuclear-matter formalism implemented in a local-density approximation. We adopt a weak transition potential including the exchange of the complete octets of pseudoscalar and vector mesons, as well as a residual strong interaction modeled on the Bonn potential. Leading GSC contributions, at first order in the residual strong interaction, are introduced on the same footing for all isospin channels of one- and two-nucleon induced decays. Together with fermion antisymmetrization, GSCs turn out to be important for an accurate determination of the decay widths. Besides opening the two-nucleon stimulated decay channels, for ¹²<sub>Λ</sub>C GSCs are responsible for 14% of the rate Γ₁ while increasing the Γ<sub>n</sub> / Γ<sub>p</sub> ratio by 4 % . Our final results for ¹²<sub>Λ</sub>C are Γ<sub>NM</sub> = 0.98, Γ<sub>n</sub> / Γ<sub>p</sub> = 0.34 , and Γ₂ / Γ<sub>NM</sub> = 0.26 . The saturation property of Γ NM with increasing hypernuclear mass number is clearly observed. The agreement with data of our predictions for Γ<sub>NM</sub>, Γ<sub>n</sub> / Γ<sub>p</sub> , and Γ₂ is rather good.
publishDate 2010
dc.date.none.fl_str_mv 2010-06-18
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/126145
url http://sedici.unlp.edu.ar/handle/10915/126145
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0556-2813
info:eu-repo/semantics/altIdentifier/issn/1089-490X
info:eu-repo/semantics/altIdentifier/arxiv/0907.4199
info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevc.81.064315
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.22299

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