Neutron and proton spectra from the decay of Lambda hypernuclei

We have determined the spectra of neutrons and protons following the decay of Λ hypernuclei through the one- and two-nucleon-induced mechanisms. The momentum distributions of the primary nucleons are calculated and a Monte Carlo simulation is used to account for final state interactions. The shape o...

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Authors: Ramos Gómez, Àngels, Vicente-Vacas, M. J., Oset Baguena, Eulogio
Format: article
Status:Published version
Publication Date:1997
Country:España
Institution:Universidad de Barcelona
Repository:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/10972
Online Access:https://hdl.handle.net/2445/10972
Access Level:Open access
Keyword:Estructura nuclear
Reaccions nuclears
Mètode de Montecarlo
Nuclear structure
Nuclear reactions
Monte Carlo method
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spelling Neutron and proton spectra from the decay of Lambda hypernucleiRamos Gómez, ÀngelsVicente-Vacas, M. J.Oset Baguena, EulogioEstructura nuclearReaccions nuclearsMètode de MontecarloNuclear structureNuclear reactionsMonte Carlo methodWe have determined the spectra of neutrons and protons following the decay of Λ hypernuclei through the one- and two-nucleon-induced mechanisms. The momentum distributions of the primary nucleons are calculated and a Monte Carlo simulation is used to account for final state interactions. The shape of the proton spectrum is sensitive to the value of Γ n / Γ p the ratio of neutron- to proton-induced decay, and the available experimental information favors larger values than those predicted by the one-pion-exchange model. From the spectra we calculate the number of neutrons ( N n ) and protons ( N p ) per Λ decay and show how the measurement of these quantities, particularly N p , can lead to a determination of Γ n / Γ p . We also show that the consideration of the two-nucleon-induced channel has a repercussion on the results, widening the band of allowed values of Γ n / Γ p with respect to what is obtained neglecting this channel.The American Physical Society1997info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/10972Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevC.55.735Physical Review C, 1997, vol. 55, núm. 2, p. 735-744http://dx.doi.org/10.1103/PhysRevC.55.735(c) The American Physical Society, 1997info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/109722026-05-27T06:46:51Z
dc.title.none.fl_str_mv Neutron and proton spectra from the decay of Lambda hypernuclei
title Neutron and proton spectra from the decay of Lambda hypernuclei
spellingShingle Neutron and proton spectra from the decay of Lambda hypernuclei
Ramos Gómez, Àngels
Estructura nuclear
Reaccions nuclears
Mètode de Montecarlo
Nuclear structure
Nuclear reactions
Monte Carlo method
title_short Neutron and proton spectra from the decay of Lambda hypernuclei
title_full Neutron and proton spectra from the decay of Lambda hypernuclei
title_fullStr Neutron and proton spectra from the decay of Lambda hypernuclei
title_full_unstemmed Neutron and proton spectra from the decay of Lambda hypernuclei
title_sort Neutron and proton spectra from the decay of Lambda hypernuclei
dc.creator.none.fl_str_mv Ramos Gómez, Àngels
Vicente-Vacas, M. J.
Oset Baguena, Eulogio
author Ramos Gómez, Àngels
author_facet Ramos Gómez, Àngels
Vicente-Vacas, M. J.
Oset Baguena, Eulogio
author_role author
author2 Vicente-Vacas, M. J.
Oset Baguena, Eulogio
author2_role author
author
dc.subject.none.fl_str_mv Estructura nuclear
Reaccions nuclears
Mètode de Montecarlo
Nuclear structure
Nuclear reactions
Monte Carlo method
topic Estructura nuclear
Reaccions nuclears
Mètode de Montecarlo
Nuclear structure
Nuclear reactions
Monte Carlo method
description We have determined the spectra of neutrons and protons following the decay of Λ hypernuclei through the one- and two-nucleon-induced mechanisms. The momentum distributions of the primary nucleons are calculated and a Monte Carlo simulation is used to account for final state interactions. The shape of the proton spectrum is sensitive to the value of Γ n / Γ p the ratio of neutron- to proton-induced decay, and the available experimental information favors larger values than those predicted by the one-pion-exchange model. From the spectra we calculate the number of neutrons ( N n ) and protons ( N p ) per Λ decay and show how the measurement of these quantities, particularly N p , can lead to a determination of Γ n / Γ p . We also show that the consideration of the two-nucleon-induced channel has a repercussion on the results, widening the band of allowed values of Γ n / Γ p with respect to what is obtained neglecting this channel.
publishDate 1997
dc.date.none.fl_str_mv 1997
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/10972
url https://hdl.handle.net/2445/10972
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevC.55.735
Physical Review C, 1997, vol. 55, núm. 2, p. 735-744
http://dx.doi.org/10.1103/PhysRevC.55.735
dc.rights.none.fl_str_mv (c) The American Physical Society, 1997
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The American Physical Society, 1997
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv The American Physical Society
publisher.none.fl_str_mv The American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301629

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