Observation of the Λb0→χc1 (3872) pK− decay
Using proton-proton collision data, collected with the LHCb detector and corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at the centre-of-mass energies of 7, 8, and 13 TeV, respectively, the decay Λ0 b → χc1(3872)pK− with χc1(3872) → J/ψ π+π − is observed for the first time. The sign...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | 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:2445/168477 |
| Acceso en línea: | https://hdl.handle.net/2445/168477 |
| Access Level: | acceso abierto |
| Palabra clave: | Hadrons Col·lisions (Física) Experiments Collisions (Physics) |
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Observation of the Λb0→χc1 (3872) pK− decayAlfonso Albero, AlejandroCalvo Gómez, MíriamCamboni, AlessandroCoquereau, SamuelGarrido Beltrán, LluísGascón Fora, DavidGironella Gironell, PereGraciani Díaz, RicardoGraugés Pous, EugeniVilasis-Cardona, XavierLHCb CollaborationMarin Benito, CarlaHadronsCol·lisions (Física)ExperimentsHadronsCollisions (Physics)ExperimentsUsing proton-proton collision data, collected with the LHCb detector and corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at the centre-of-mass energies of 7, 8, and 13 TeV, respectively, the decay Λ0 b → χc1(3872)pK− with χc1(3872) → J/ψ π+π − is observed for the first time. The significance of the observed signal is in excess of seven standard deviations. It is found that (58 ± 15)% of the decays proceed via the two-body intermediate state χc1(3872)Λ(1520). The branching fraction with respect to that of the Λ0 b → ψ(2S)pK− decay mode, where the ψ(2S) meson is reconstructed in the J/ψ π+π − final state, is measured to be: B(Λ0b → χc1(3872)pK−)B(Λ0b → ψ(2S)pK−)×B(χc1(3872) → J/ψ π+π−)B(ψ(2S) → J/ψ π+π−)= (5.4 ± 1.1 ± 0.2) × 10−2, where the first uncertainty is statistical and the second is systematic.Springer Verlag2020202020192020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion19 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/168477Articles 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/10.1007/JHEP09(2019)028Journal of High Energy Physics, 2019, p. 28https://doi.org/10.1007/JHEP09(2019)028cc-by (c) Alfonso Albero, Alejandro et al., 2019http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1684772026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
Observation of the Λb0→χc1 (3872) pK− decay |
| title |
Observation of the Λb0→χc1 (3872) pK− decay |
| spellingShingle |
Observation of the Λb0→χc1 (3872) pK− decay Alfonso Albero, Alejandro Hadrons Col·lisions (Física) Experiments Hadrons Collisions (Physics) Experiments |
| title_short |
Observation of the Λb0→χc1 (3872) pK− decay |
| title_full |
Observation of the Λb0→χc1 (3872) pK− decay |
| title_fullStr |
Observation of the Λb0→χc1 (3872) pK− decay |
| title_full_unstemmed |
Observation of the Λb0→χc1 (3872) pK− decay |
| title_sort |
Observation of the Λb0→χc1 (3872) pK− decay |
| dc.creator.none.fl_str_mv |
Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Gironella Gironell, Pere Graciani Díaz, Ricardo Graugés Pous, Eugeni Vilasis-Cardona, Xavier LHCb Collaboration Marin Benito, Carla |
| author |
Alfonso Albero, Alejandro |
| author_facet |
Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Gironella Gironell, Pere Graciani Díaz, Ricardo Graugés Pous, Eugeni Vilasis-Cardona, Xavier LHCb Collaboration Marin Benito, Carla |
| author_role |
author |
| author2 |
Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Gironella Gironell, Pere Graciani Díaz, Ricardo Graugés Pous, Eugeni Vilasis-Cardona, Xavier LHCb Collaboration Marin Benito, Carla |
| author2_role |
author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Hadrons Col·lisions (Física) Experiments Hadrons Collisions (Physics) Experiments |
| topic |
Hadrons Col·lisions (Física) Experiments Hadrons Collisions (Physics) Experiments |
| description |
Using proton-proton collision data, collected with the LHCb detector and corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at the centre-of-mass energies of 7, 8, and 13 TeV, respectively, the decay Λ0 b → χc1(3872)pK− with χc1(3872) → J/ψ π+π − is observed for the first time. The significance of the observed signal is in excess of seven standard deviations. It is found that (58 ± 15)% of the decays proceed via the two-body intermediate state χc1(3872)Λ(1520). The branching fraction with respect to that of the Λ0 b → ψ(2S)pK− decay mode, where the ψ(2S) meson is reconstructed in the J/ψ π+π − final state, is measured to be: B(Λ0b → χc1(3872)pK−)B(Λ0b → ψ(2S)pK−)×B(χc1(3872) → J/ψ π+π−)B(ψ(2S) → J/ψ π+π−)= (5.4 ± 1.1 ± 0.2) × 10−2, where the first uncertainty is statistical and the second is systematic. |
| publishDate |
2019 |
| dc.date.none.fl_str_mv |
2019 2020 2020 2020 |
| 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/2445/168477 |
| url |
https://hdl.handle.net/2445/168477 |
| 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/10.1007/JHEP09(2019)028 Journal of High Energy Physics, 2019, p. 28 https://doi.org/10.1007/JHEP09(2019)028 |
| dc.rights.none.fl_str_mv |
cc-by (c) Alfonso Albero, Alejandro et al., 2019 http://creativecommons.org/licenses/by/3.0/es info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
cc-by (c) Alfonso Albero, Alejandro et al., 2019 http://creativecommons.org/licenses/by/3.0/es |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
19 p. application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
Springer Verlag |
| publisher.none.fl_str_mv |
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) |
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Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Recercat. Dipósit de la Recerca de Catalunya |
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Recercat. Dipósit de la Recerca de Catalunya |
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