Measurement of CP violation in B 0 → J/ ψK S 0 and B 0 → ψ(2 S) K S 0 decays
A measurement is presented of decay-time-dependent CP violation in the decays B 0 → J/ ψ K S 0 and B 0 → ψ(2 S) K S 0 , where the J/ ψ is reconstructed from two electrons and the ψ(2 S) from two muons. The analysis uses a sample of pp collision data recorded with the LHCb experiment at centre-of-mas...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| 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:2445/186504 |
| Acceso en línea: | https://hdl.handle.net/2445/186504 |
| Access Level: | acceso abierto |
| Palabra clave: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Large Hadron Collider (France and Switzerland) Particle physics |
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Measurement of CP violation in B 0 → J/ ψK S 0 and B 0 → ψ(2 S) K S 0 decaysAlfonso Albero, AlejandroAmato, S.Coquereau, SamuelFernandez, G.Garrido Beltrán, LluísGascón Fora, DavidGraciani Díaz, RicardoGraugés Pous, EugeniMarin Benito, CarlaPicatoste Olloqui, EduardoRives Molina, Vicente JoséLHCb CollaborationHadronsGran Col·lisionador d'HadronsFísica de partículesExperimentsHadronsLarge Hadron Collider (France and Switzerland)Particle physicsExperimentsA measurement is presented of decay-time-dependent CP violation in the decays B 0 → J/ ψ K S 0 and B 0 → ψ(2 S) K S 0 , where the J/ ψ is reconstructed from two electrons and the ψ(2 S) from two muons. The analysis uses a sample of pp collision data recorded with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1. The CP -violation observables are measured to be C({B}^0\to J/ψ {K}S^0)=0.12± 0.07± 0.02, {}S({B}^0\to J/ψ {K}S^0)=0.83± 0.08± 0.01, {}C({B}^0\to ψ (2S){K}S^0)=-0.05± 0.10± 0.01, {}S({B}^0\to ψ (2S){K}S^0)=0.84± 0.10± 0.01, where C describes CP violation in the direct decay, and S describes CP violation in the interference between the amplitudes for the direct decay and for the decay after {B}^0-{\overline{B}}^0 oscillation. The first uncertainties are statistical and the second are systematic. The two sets of results are compatible with the previous LHCb measurement using B 0 → J/ ψ K S 0 decays, where the J/ ψ meson was reconstructed from two muons. The averages of all three sets of LHCb results are C({B}^0\to [c\overline{c}]{K}S^0)=-0.017± 0.029, {}S({B}^0\to [c\overline{c}]{K}S^0)=0.760± 0.034, under the assumption that higher-order contributions to the decay amplitudes are negligible. The uncertainties include statistical and systematic contributions.Springer Verlag2022202220172022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion18 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/186504Articles 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/JHEP11(2017)170Journal of High Energy Physics, 2017, vol. 2017, num. 170, p. 1-18https://doi.org/10.1007/JHEP11(2017)170cc-by (c) Alfonso Albero, Alejandro et al., 2017https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1865042026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
Measurement of CP violation in B 0 → J/ ψK S 0 and B 0 → ψ(2 S) K S 0 decays |
| title |
Measurement of CP violation in B 0 → J/ ψK S 0 and B 0 → ψ(2 S) K S 0 decays |
| spellingShingle |
Measurement of CP violation in B 0 → J/ ψK S 0 and B 0 → ψ(2 S) K S 0 decays Alfonso Albero, Alejandro Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
| title_short |
Measurement of CP violation in B 0 → J/ ψK S 0 and B 0 → ψ(2 S) K S 0 decays |
| title_full |
Measurement of CP violation in B 0 → J/ ψK S 0 and B 0 → ψ(2 S) K S 0 decays |
| title_fullStr |
Measurement of CP violation in B 0 → J/ ψK S 0 and B 0 → ψ(2 S) K S 0 decays |
| title_full_unstemmed |
Measurement of CP violation in B 0 → J/ ψK S 0 and B 0 → ψ(2 S) K S 0 decays |
| title_sort |
Measurement of CP violation in B 0 → J/ ψK S 0 and B 0 → ψ(2 S) K S 0 decays |
| dc.creator.none.fl_str_mv |
Alfonso Albero, Alejandro Amato, S. Coquereau, Samuel Fernandez, G. Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José LHCb Collaboration |
| author |
Alfonso Albero, Alejandro |
| author_facet |
Alfonso Albero, Alejandro Amato, S. Coquereau, Samuel Fernandez, G. Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José LHCb Collaboration |
| author_role |
author |
| author2 |
Amato, S. Coquereau, Samuel Fernandez, G. Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José LHCb Collaboration |
| author2_role |
author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
| topic |
Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
| description |
A measurement is presented of decay-time-dependent CP violation in the decays B 0 → J/ ψ K S 0 and B 0 → ψ(2 S) K S 0 , where the J/ ψ is reconstructed from two electrons and the ψ(2 S) from two muons. The analysis uses a sample of pp collision data recorded with the LHCb experiment at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1. The CP -violation observables are measured to be C({B}^0\to J/ψ {K}S^0)=0.12± 0.07± 0.02, {}S({B}^0\to J/ψ {K}S^0)=0.83± 0.08± 0.01, {}C({B}^0\to ψ (2S){K}S^0)=-0.05± 0.10± 0.01, {}S({B}^0\to ψ (2S){K}S^0)=0.84± 0.10± 0.01, where C describes CP violation in the direct decay, and S describes CP violation in the interference between the amplitudes for the direct decay and for the decay after {B}^0-{\overline{B}}^0 oscillation. The first uncertainties are statistical and the second are systematic. The two sets of results are compatible with the previous LHCb measurement using B 0 → J/ ψ K S 0 decays, where the J/ ψ meson was reconstructed from two muons. The averages of all three sets of LHCb results are C({B}^0\to [c\overline{c}]{K}S^0)=-0.017± 0.029, {}S({B}^0\to [c\overline{c}]{K}S^0)=0.760± 0.034, under the assumption that higher-order contributions to the decay amplitudes are negligible. The uncertainties include statistical and systematic contributions. |
| publishDate |
2017 |
| dc.date.none.fl_str_mv |
2017 2022 2022 2022 |
| 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/2445/186504 |
| url |
https://hdl.handle.net/2445/186504 |
| 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/JHEP11(2017)170 Journal of High Energy Physics, 2017, vol. 2017, num. 170, p. 1-18 https://doi.org/10.1007/JHEP11(2017)170 |
| dc.rights.none.fl_str_mv |
cc-by (c) Alfonso Albero, Alejandro et al., 2017 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
cc-by (c) Alfonso Albero, Alejandro et al., 2017 https://creativecommons.org/licenses/by/4.0/ |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
18 p. application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
Springer Verlag |
| publisher.none.fl_str_mv |
Springer Verlag |
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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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