A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states

The hidden-charm pentaquark Pc(4450) observed recently by the LHCb collaboration may be of molecular nature, as advocated by some unitary approaches that also predict pentaquark partners in the strangeness S=−1 sector. In this work we argue that a hidden-charm strange pentaquark could be seen from t...

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Autores: Feijoo Aliau, Albert, Magas, Volodymyr, Ramos Gómez, Àngels, Oset Baguena, Eulogio
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/116244
Acesso em linha:https://hdl.handle.net/2445/116244
Access Level:acceso abierto
Palavra-chave:Fenomenologia (Física)
Quarks
Microagregats
Partícules (Física nuclear)
Acceleradors de partícules
Phenomenological theory (Physics)
Microclusters
Particles (Nuclear physics)
Particle accelerators
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spelling A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ statesFeijoo Aliau, AlbertMagas, VolodymyrRamos Gómez, ÀngelsOset Baguena, EulogioFenomenologia (Física)QuarksMicroagregatsPartícules (Física nuclear)Acceleradors de partículesPhenomenological theory (Physics)QuarksMicroclustersParticles (Nuclear physics)Particle acceleratorsThe hidden-charm pentaquark Pc(4450) observed recently by the LHCb collaboration may be of molecular nature, as advocated by some unitary approaches that also predict pentaquark partners in the strangeness S=−1 sector. In this work we argue that a hidden-charm strange pentaquark could be seen from the decay of the Λb, just as in the case of the non-strange Pc(4450), but looking into the J/ψηΛ decay mode and forming the invariant mass spectrum of J/ψΛ pairs. In the model presented here, which assumes a standard weak decay topology and incorporates the hadronization process and final-state interaction effects, we find the J/ψηΛ final states to be populated with similar strength as the J/ψK−p states employed for the observation of the non-strange pentaquark. This makes the Λb→J/ψηΛ decay to be an interesting process to observe a possible strange partner of the Pc(4450). We study the dependence of the J/ψΛ mass spectra on various model ingredients and on the unknown properties of the strange pentaquark.Società Italiana di Fisica & Springer Verlag2017201720162017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion12 p.application/pdfhttps://hdl.handle.net/2445/116244Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1140/epjc/s10052-016-4302-7European Physical Journal C, 2016, vol. 76, num. 8, p. 446-1-446-12https://doi.org/10.1140/epjc/s10052-016-4302-7cc-by (c) Feijoo, Alberto et al., 2016http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1162442026-05-29T05:05:01Z
dc.title.none.fl_str_mv A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states
title A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states
spellingShingle A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states
Feijoo Aliau, Albert
Fenomenologia (Física)
Quarks
Microagregats
Partícules (Física nuclear)
Acceleradors de partícules
Phenomenological theory (Physics)
Quarks
Microclusters
Particles (Nuclear physics)
Particle accelerators
title_short A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states
title_full A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states
title_fullStr A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states
title_full_unstemmed A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states
title_sort A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states
dc.creator.none.fl_str_mv Feijoo Aliau, Albert
Magas, Volodymyr
Ramos Gómez, Àngels
Oset Baguena, Eulogio
author Feijoo Aliau, Albert
author_facet Feijoo Aliau, Albert
Magas, Volodymyr
Ramos Gómez, Àngels
Oset Baguena, Eulogio
author_role author
author2 Magas, Volodymyr
Ramos Gómez, Àngels
Oset Baguena, Eulogio
author2_role author
author
author
dc.subject.none.fl_str_mv Fenomenologia (Física)
Quarks
Microagregats
Partícules (Física nuclear)
Acceleradors de partícules
Phenomenological theory (Physics)
Quarks
Microclusters
Particles (Nuclear physics)
Particle accelerators
topic Fenomenologia (Física)
Quarks
Microagregats
Partícules (Física nuclear)
Acceleradors de partícules
Phenomenological theory (Physics)
Quarks
Microclusters
Particles (Nuclear physics)
Particle accelerators
description The hidden-charm pentaquark Pc(4450) observed recently by the LHCb collaboration may be of molecular nature, as advocated by some unitary approaches that also predict pentaquark partners in the strangeness S=−1 sector. In this work we argue that a hidden-charm strange pentaquark could be seen from the decay of the Λb, just as in the case of the non-strange Pc(4450), but looking into the J/ψηΛ decay mode and forming the invariant mass spectrum of J/ψΛ pairs. In the model presented here, which assumes a standard weak decay topology and incorporates the hadronization process and final-state interaction effects, we find the J/ψηΛ final states to be populated with similar strength as the J/ψK−p states employed for the observation of the non-strange pentaquark. This makes the Λb→J/ψηΛ decay to be an interesting process to observe a possible strange partner of the Pc(4450). We study the dependence of the J/ψΛ mass spectra on various model ingredients and on the unknown properties of the strange pentaquark.
publishDate 2016
dc.date.none.fl_str_mv 2016
2017
2017
2017
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/2445/116244
url https://hdl.handle.net/2445/116244
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1140/epjc/s10052-016-4302-7
European Physical Journal C, 2016, vol. 76, num. 8, p. 446-1-446-12
https://doi.org/10.1140/epjc/s10052-016-4302-7
dc.rights.none.fl_str_mv cc-by (c) Feijoo, Alberto et al., 2016
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Feijoo, Alberto et al., 2016
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 12 p.
application/pdf
dc.publisher.none.fl_str_mv Società Italiana di Fisica & Springer Verlag
publisher.none.fl_str_mv Società Italiana di Fisica & Springer Verlag
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,198674

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