Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay

Autores
Bauer, Eduardo
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A consistent microscopic model is applied to the calculation of the nucleon emission spectra in the nonmesonic weak decay of Λ-hypernuclei. We adopt a nuclear matter formalism extended to finite nuclei via the local density approximation, a one-meson exchange weak transition potential and a Bonn nucleon–nucleon strong potential. Ground state correlations and final state interaction, at second order in the nucleon–nucleon interaction, are introduced on the same footing for all the isospin channels of one- and two-nucleon induced decays. Double-coincidence nucleon spectra are predicted for 12 ΛC and compared with recent KEK data. Discrepancies with data remain for proton emission and for both neutron–proton and neutron–neutron emission in the non-back-to-back kinematics region. Motivated by a recent triple-coincidence measurement by FINUDA, we estimate the three-body induced decay, where we have found, Γ3/Γ2 ∼= 0.23. Our microscopic model also predicts values for the asymmetry parameter in 12 ΛC, consistent with the asymmetry measured at KEK.
Fil: Bauer, Eduardo. Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina. 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
Materia
Λ-HYPERNUCLEI
FSI
NON-MESONIC WEAK DECAY
TWO-NUCLEON INDUCED DECAY
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:11336/2397
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/2397
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decayBauer, EduardoΛ-HYPERNUCLEIFSINON-MESONIC WEAK DECAYTWO-NUCLEON INDUCED DECAYhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A consistent microscopic model is applied to the calculation of the nucleon emission spectra in the nonmesonic weak decay of Λ-hypernuclei. We adopt a nuclear matter formalism extended to finite nuclei via the local density approximation, a one-meson exchange weak transition potential and a Bonn nucleon–nucleon strong potential. Ground state correlations and final state interaction, at second order in the nucleon–nucleon interaction, are introduced on the same footing for all the isospin channels of one- and two-nucleon induced decays. Double-coincidence nucleon spectra are predicted for 12 ΛC and compared with recent KEK data. Discrepancies with data remain for proton emission and for both neutron–proton and neutron–neutron emission in the non-back-to-back kinematics region. Motivated by a recent triple-coincidence measurement by FINUDA, we estimate the three-body induced decay, where we have found, Γ3/Γ2 ∼= 0.23. Our microscopic model also predicts values for the asymmetry parameter in 12 ΛC, consistent with the asymmetry measured at KEK.Fil: Bauer, Eduardo. Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina. 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; ArgentinaElsevier Science2013-01-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/2397Bauer, Eduardo; Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay; Elsevier Science; Nuclear Physics A; 914; 8-1-2013; 204-2080375-9474engXI International Conference on Hypernuclear and Strange Particle Physics (HYP2012)info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0375947413000031info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysa.2012.12.127info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:16:20Zoai:ri.conicet.gov.ar:11336/2397instacron: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:34982025-09-10 13:16:21.283CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay
title Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay
spellingShingle Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay
Bauer, Eduardo
Λ-HYPERNUCLEI
FSI
NON-MESONIC WEAK DECAY
TWO-NUCLEON INDUCED DECAY
title_short Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay
title_full Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay
title_fullStr Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay
title_full_unstemmed Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay
title_sort Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay
dc.creator.none.fl_str_mv Bauer, Eduardo
author Bauer, Eduardo
author_facet Bauer, Eduardo
author_role author
dc.subject.none.fl_str_mv Λ-HYPERNUCLEI
FSI
NON-MESONIC WEAK DECAY
TWO-NUCLEON INDUCED DECAY
topic Λ-HYPERNUCLEI
FSI
NON-MESONIC WEAK DECAY
TWO-NUCLEON INDUCED DECAY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A consistent microscopic model is applied to the calculation of the nucleon emission spectra in the nonmesonic weak decay of Λ-hypernuclei. We adopt a nuclear matter formalism extended to finite nuclei via the local density approximation, a one-meson exchange weak transition potential and a Bonn nucleon–nucleon strong potential. Ground state correlations and final state interaction, at second order in the nucleon–nucleon interaction, are introduced on the same footing for all the isospin channels of one- and two-nucleon induced decays. Double-coincidence nucleon spectra are predicted for 12 ΛC and compared with recent KEK data. Discrepancies with data remain for proton emission and for both neutron–proton and neutron–neutron emission in the non-back-to-back kinematics region. Motivated by a recent triple-coincidence measurement by FINUDA, we estimate the three-body induced decay, where we have found, Γ3/Γ2 ∼= 0.23. Our microscopic model also predicts values for the asymmetry parameter in 12 ΛC, consistent with the asymmetry measured at KEK.
Fil: Bauer, Eduardo. Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina. 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
description A consistent microscopic model is applied to the calculation of the nucleon emission spectra in the nonmesonic weak decay of Λ-hypernuclei. We adopt a nuclear matter formalism extended to finite nuclei via the local density approximation, a one-meson exchange weak transition potential and a Bonn nucleon–nucleon strong potential. Ground state correlations and final state interaction, at second order in the nucleon–nucleon interaction, are introduced on the same footing for all the isospin channels of one- and two-nucleon induced decays. Double-coincidence nucleon spectra are predicted for 12 ΛC and compared with recent KEK data. Discrepancies with data remain for proton emission and for both neutron–proton and neutron–neutron emission in the non-back-to-back kinematics region. Motivated by a recent triple-coincidence measurement by FINUDA, we estimate the three-body induced decay, where we have found, Γ3/Γ2 ∼= 0.23. Our microscopic model also predicts values for the asymmetry parameter in 12 ΛC, consistent with the asymmetry measured at KEK.
publishDate 2013
dc.date.none.fl_str_mv 2013-01-08
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/11336/2397
Bauer, Eduardo; Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay; Elsevier Science; Nuclear Physics A; 914; 8-1-2013; 204-208
0375-9474
url http://hdl.handle.net/11336/2397
identifier_str_mv Bauer, Eduardo; Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay; Elsevier Science; Nuclear Physics A; 914; 8-1-2013; 204-208
0375-9474
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv XI International Conference on Hypernuclear and Strange Particle Physics (HYP2012)
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0375947413000031
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.nuclphysa.2012.12.127
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 Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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
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score 12.993085

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