First observation of the Λ0b → Λ+ c D− s K+K− decay and search for pentaquarks in the Λ+ c D− s system
The Λ0 b → Λþc D−s KþK− decay is observed for the first time using the data sample from proton-proton collisions recorded at a center-of-mass energy of 13 TeV with the LHCb detector, corresponding to an integrated luminosity of 6 fb−1. The ratio of branching fraction to that of Λ0 b → Λþc D−s decays...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dau.url.edu:20.500.14342/5973 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/5973 https://doi.org/10.1103/b28d-z2xc |
| Access Level: | acceso abierto |
| Palabra clave: | Branching fraction Quantum chromodynamics Strong interaction Exotics bayrons Gran col·lisionador d'hadrons (França i Suïssa) 530.1 539 |
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First observation of the Λ0b → Λ+ c D− s K+K− decay and search for pentaquarks in the Λ+ c D− s systemCalvo Gomez, MiriamGolobardes Ribé, ElisabetVilasis-Cardona, XavierLHCb Collaboration - CERNBranching fractionQuantum chromodynamicsStrong interactionExotics bayronsGran col·lisionador d'hadrons (França i Suïssa)530.1539The Λ0 b → Λþc D−s KþK− decay is observed for the first time using the data sample from proton-proton collisions recorded at a center-of-mass energy of 13 TeV with the LHCb detector, corresponding to an integrated luminosity of 6 fb−1. The ratio of branching fraction to that of Λ0 b → Λþc D−s decays is measured as 0.0141 0.0019 0.0012, where the first uncertainty is statistical and the second systematic. A search for hidden-charm pentaquarks with strangeness is performed in the Λþc D−s system. No evidence is found, and upper limits on the production ratio of Pc¯csð4338Þ0 and Pc¯csð4459Þ0 pentaquarks relative to the Λþc D−s final state are set at the 95% confidence level as 0.12 and 0.20, respectively.info:eu-repo/semantics/publishedVersionAmerican Physical SocietyUniversitat Ramon Llull. La SalleCERN2026202620252025info:eu-repo/semantics/article14 p.application/pdfhttp://hdl.handle.net/20.500.14342/5973https://doi.org/10.1103/b28d-z2xcreponame:DAU Arxiu Digital de la Universitat Ramon Llullinstname:Universitat Ramon Llull (URL)InglésPhysical Review D, 2025. Vol. 112, 052013© CERNAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dau.url.edu:20.500.14342/59732026-06-21T06:40:37Z |
| dc.title.none.fl_str_mv |
First observation of the Λ0b → Λ+ c D− s K+K− decay and search for pentaquarks in the Λ+ c D− s system |
| title |
First observation of the Λ0b → Λ+ c D− s K+K− decay and search for pentaquarks in the Λ+ c D− s system |
| spellingShingle |
First observation of the Λ0b → Λ+ c D− s K+K− decay and search for pentaquarks in the Λ+ c D− s system Calvo Gomez, Miriam Branching fraction Quantum chromodynamics Strong interaction Exotics bayrons Gran col·lisionador d'hadrons (França i Suïssa) 530.1 539 |
| title_short |
First observation of the Λ0b → Λ+ c D− s K+K− decay and search for pentaquarks in the Λ+ c D− s system |
| title_full |
First observation of the Λ0b → Λ+ c D− s K+K− decay and search for pentaquarks in the Λ+ c D− s system |
| title_fullStr |
First observation of the Λ0b → Λ+ c D− s K+K− decay and search for pentaquarks in the Λ+ c D− s system |
| title_full_unstemmed |
First observation of the Λ0b → Λ+ c D− s K+K− decay and search for pentaquarks in the Λ+ c D− s system |
| title_sort |
First observation of the Λ0b → Λ+ c D− s K+K− decay and search for pentaquarks in the Λ+ c D− s system |
| dc.creator.none.fl_str_mv |
Calvo Gomez, Miriam Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN |
| author |
Calvo Gomez, Miriam |
| author_facet |
Calvo Gomez, Miriam Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN |
| author_role |
author |
| author2 |
Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN |
| author2_role |
author author author |
| dc.contributor.none.fl_str_mv |
Universitat Ramon Llull. La Salle CERN |
| dc.subject.none.fl_str_mv |
Branching fraction Quantum chromodynamics Strong interaction Exotics bayrons Gran col·lisionador d'hadrons (França i Suïssa) 530.1 539 |
| topic |
Branching fraction Quantum chromodynamics Strong interaction Exotics bayrons Gran col·lisionador d'hadrons (França i Suïssa) 530.1 539 |
| description |
The Λ0 b → Λþc D−s KþK− decay is observed for the first time using the data sample from proton-proton collisions recorded at a center-of-mass energy of 13 TeV with the LHCb detector, corresponding to an integrated luminosity of 6 fb−1. The ratio of branching fraction to that of Λ0 b → Λþc D−s decays is measured as 0.0141 0.0019 0.0012, where the first uncertainty is statistical and the second systematic. A search for hidden-charm pentaquarks with strangeness is performed in the Λþc D−s system. No evidence is found, and upper limits on the production ratio of Pc¯csð4338Þ0 and Pc¯csð4459Þ0 pentaquarks relative to the Λþc D−s final state are set at the 95% confidence level as 0.12 and 0.20, respectively. |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025 2025 2026 2026 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/20.500.14342/5973 https://doi.org/10.1103/b28d-z2xc |
| url |
http://hdl.handle.net/20.500.14342/5973 https://doi.org/10.1103/b28d-z2xc |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Physical Review D, 2025. Vol. 112, 052013 |
| dc.rights.none.fl_str_mv |
© CERN Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
© CERN Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
14 p. 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:DAU Arxiu Digital de la Universitat Ramon Llull instname:Universitat Ramon Llull (URL) |
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Universitat Ramon Llull (URL) |
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DAU Arxiu Digital de la Universitat Ramon Llull |
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DAU Arxiu Digital de la Universitat Ramon Llull |
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