Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei

Autores
Bauer, Eduardo; Garbarino, G.; Parreño, A.; Ramos, A.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The non--mesonic weak decay of polarized $\Lambda$--hypernuclei is studied with amicroscopic diagrammatic formalism in which one-- and two--nucleon induced decay mechanisms,$\vec{\Lambda} N \to NN$ and $\vec{\Lambda} NN \to NNN$, are considered togetherwith (and on the same ground of) nucleon final state interactions.We adopt a nuclear matter formalism extended to finite nuclei via the local densityapproximation. Our approach adopts different one--meson--exchange weaktransition potentials, while the strong interaction effects are accountedfor by a Bonn nucleon--nucleon interaction. We alsoconsider the two--pion--exchange effect in the weak transition potential.Both the two-nucleon induced decay mechanism and the final state interactionsreduce the magnitude of the asymmetry.The quantum interference terms considered in the present microscopic approachgive rise to an opposite behavior of the asymmetry with increasing energy cutsto that observed in models describing the nucleon final state interactionssemi-classically via the intranuclear cascade code.Our results for the asymmetry parameter in$^{12}_{\Lambda}$C obtained with different potential models are consistent withthe asymmetry measured at KEK.
Fil: Bauer, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Garbarino, G.. Università di Torino; Italia
Fil: Parreño, A.. Universidad de Barcelona; España
Fil: Ramos, A.. Universidad de Barcelona; España
Materia
HYPERNUCLEOS
DECAIMIENTO NO MESONICO
ASIMETRIA
DECAIMIENTO DEBIL
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/269059
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernucleiBauer, EduardoGarbarino, G.Parreño, A.Ramos, A.HYPERNUCLEOSDECAIMIENTO NO MESONICOASIMETRIADECAIMIENTO DEBILhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The non--mesonic weak decay of polarized $\Lambda$--hypernuclei is studied with amicroscopic diagrammatic formalism in which one-- and two--nucleon induced decay mechanisms,$\vec{\Lambda} N \to NN$ and $\vec{\Lambda} NN \to NNN$, are considered togetherwith (and on the same ground of) nucleon final state interactions.We adopt a nuclear matter formalism extended to finite nuclei via the local densityapproximation. Our approach adopts different one--meson--exchange weaktransition potentials, while the strong interaction effects are accountedfor by a Bonn nucleon--nucleon interaction. We alsoconsider the two--pion--exchange effect in the weak transition potential.Both the two-nucleon induced decay mechanism and the final state interactionsreduce the magnitude of the asymmetry.The quantum interference terms considered in the present microscopic approachgive rise to an opposite behavior of the asymmetry with increasing energy cutsto that observed in models describing the nucleon final state interactionssemi-classically via the intranuclear cascade code.Our results for the asymmetry parameter in$^{12}_{\Lambda}$C obtained with different potential models are consistent withthe asymmetry measured at KEK.Fil: Bauer, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Garbarino, G.. Università di Torino; ItaliaFil: Parreño, A.. Universidad de Barcelona; EspañaFil: Ramos, A.. Universidad de Barcelona; EspañaAmerican Physical Society2012-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/269059Bauer, Eduardo; Garbarino, G.; Parreño, A.; Ramos, A.; Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei; American Physical Society; Physical Review C: Nuclear Physics; 85; 2; 2-2012; 1-140556-2813CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prc/abstract/10.1103/PhysRevC.85.024321info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevC.85.024321info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:01:32Zoai:ri.conicet.gov.ar:11336/269059instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:01:32.614CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei
title Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei
spellingShingle Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei
Bauer, Eduardo
HYPERNUCLEOS
DECAIMIENTO NO MESONICO
ASIMETRIA
DECAIMIENTO DEBIL
title_short Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei
title_full Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei
title_fullStr Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei
title_full_unstemmed Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei
title_sort Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei
dc.creator.none.fl_str_mv Bauer, Eduardo
Garbarino, G.
Parreño, A.
Ramos, A.
author Bauer, Eduardo
author_facet Bauer, Eduardo
Garbarino, G.
Parreño, A.
Ramos, A.
author_role author
author2 Garbarino, G.
Parreño, A.
Ramos, A.
author2_role author
author
author
dc.subject.none.fl_str_mv HYPERNUCLEOS
DECAIMIENTO NO MESONICO
ASIMETRIA
DECAIMIENTO DEBIL
topic HYPERNUCLEOS
DECAIMIENTO NO MESONICO
ASIMETRIA
DECAIMIENTO DEBIL
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The non--mesonic weak decay of polarized $\Lambda$--hypernuclei is studied with amicroscopic diagrammatic formalism in which one-- and two--nucleon induced decay mechanisms,$\vec{\Lambda} N \to NN$ and $\vec{\Lambda} NN \to NNN$, are considered togetherwith (and on the same ground of) nucleon final state interactions.We adopt a nuclear matter formalism extended to finite nuclei via the local densityapproximation. Our approach adopts different one--meson--exchange weaktransition potentials, while the strong interaction effects are accountedfor by a Bonn nucleon--nucleon interaction. We alsoconsider the two--pion--exchange effect in the weak transition potential.Both the two-nucleon induced decay mechanism and the final state interactionsreduce the magnitude of the asymmetry.The quantum interference terms considered in the present microscopic approachgive rise to an opposite behavior of the asymmetry with increasing energy cutsto that observed in models describing the nucleon final state interactionssemi-classically via the intranuclear cascade code.Our results for the asymmetry parameter in$^{12}_{\Lambda}$C obtained with different potential models are consistent withthe asymmetry measured at KEK.
Fil: Bauer, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Garbarino, G.. Università di Torino; Italia
Fil: Parreño, A.. Universidad de Barcelona; España
Fil: Ramos, A.. Universidad de Barcelona; España
description The non--mesonic weak decay of polarized $\Lambda$--hypernuclei is studied with amicroscopic diagrammatic formalism in which one-- and two--nucleon induced decay mechanisms,$\vec{\Lambda} N \to NN$ and $\vec{\Lambda} NN \to NNN$, are considered togetherwith (and on the same ground of) nucleon final state interactions.We adopt a nuclear matter formalism extended to finite nuclei via the local densityapproximation. Our approach adopts different one--meson--exchange weaktransition potentials, while the strong interaction effects are accountedfor by a Bonn nucleon--nucleon interaction. We alsoconsider the two--pion--exchange effect in the weak transition potential.Both the two-nucleon induced decay mechanism and the final state interactionsreduce the magnitude of the asymmetry.The quantum interference terms considered in the present microscopic approachgive rise to an opposite behavior of the asymmetry with increasing energy cutsto that observed in models describing the nucleon final state interactionssemi-classically via the intranuclear cascade code.Our results for the asymmetry parameter in$^{12}_{\Lambda}$C obtained with different potential models are consistent withthe asymmetry measured at KEK.
publishDate 2012
dc.date.none.fl_str_mv 2012-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/269059
Bauer, Eduardo; Garbarino, G.; Parreño, A.; Ramos, A.; Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei; American Physical Society; Physical Review C: Nuclear Physics; 85; 2; 2-2012; 1-14
0556-2813
CONICET Digital
CONICET
url http://hdl.handle.net/11336/269059
identifier_str_mv Bauer, Eduardo; Garbarino, G.; Parreño, A.; Ramos, A.; Microscopic approach to the proton asymmetry in the nonmesonic weak decay of Λ hypernuclei; American Physical Society; Physical Review C: Nuclear Physics; 85; 2; 2-2012; 1-14
0556-2813
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prc/abstract/10.1103/PhysRevC.85.024321
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevC.85.024321
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842269702565396480
score 13.13397

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