First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays
A flavour-tagged time-dependent angular analysis of B0 s → J/ψφ decays is presented where the J/ψ meson is reconstructed through its decay to an e +e − pair. 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...
| Autores: | , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/185481 |
| Acceso en línea: | https://hdl.handle.net/2445/185481 |
| 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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First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decaysLHCb CollaborationAlfonso Albero, AlejandroGarcía Moreno, PaulaGarrido Beltrán, LluísGironella Gironell, P.Gomez Fernandez, S.Graugés Pous, EugeniLobo Salvia, A.Mauricio, J.Vazquez Gomez, R.Marin Benito, CarlaHadronsGran Col·lisionador d'HadronsFísica de partículesExperimentsHadronsLarge Hadron Collider (France and Switzerland)Particle physicsExperimentsA flavour-tagged time-dependent angular analysis of B0 s → J/ψφ decays is presented where the J/ψ meson is reconstructed through its decay to an e +e − pair. 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-violating phase and lifetime parameters of the B0 s system are measured to be φs = 0.00 ± 0.28 ± 0.05 rad, ∆Γs = 0.115 ± 0.045 ± 0.011 ps−1 and Γs = 0.608 ± 0.018 ± 0.011 ps−1 where the first uncertainty is statistical and the second systematic. This is the first time that CP-violating parameters are measured in the B0 s → J/ψφ decay with an e +e − pair in the final state. The results are consistent with previous measurements in other channels and with the Standard Model predictions.Springer Verlag2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/185481Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1007/JHEP10(2021)060Journal of High Energy Physics, 2021, vol. 2021, p. 1-28https://doi.org/10.1007/JHEP10(2021)060cc-by (c) LHCb Collaboration et al., 2021https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1854812026-05-27T06:46:51Z |
| dc.title.none.fl_str_mv |
First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title |
First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| spellingShingle |
First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays LHCb Collaboration Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
| title_short |
First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title_full |
First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title_fullStr |
First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title_full_unstemmed |
First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title_sort |
First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| dc.creator.none.fl_str_mv |
LHCb Collaboration Alfonso Albero, Alejandro García Moreno, Paula Garrido Beltrán, Lluís Gironella Gironell, P. Gomez Fernandez, S. Graugés Pous, Eugeni Lobo Salvia, A. Mauricio, J. Vazquez Gomez, R. Marin Benito, Carla |
| author |
LHCb Collaboration |
| author_facet |
LHCb Collaboration Alfonso Albero, Alejandro García Moreno, Paula Garrido Beltrán, Lluís Gironella Gironell, P. Gomez Fernandez, S. Graugés Pous, Eugeni Lobo Salvia, A. Mauricio, J. Vazquez Gomez, R. Marin Benito, Carla |
| author_role |
author |
| author2 |
Alfonso Albero, Alejandro García Moreno, Paula Garrido Beltrán, Lluís Gironella Gironell, P. Gomez Fernandez, S. Graugés Pous, Eugeni Lobo Salvia, A. Mauricio, J. Vazquez Gomez, R. Marin Benito, Carla |
| author2_role |
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 flavour-tagged time-dependent angular analysis of B0 s → J/ψφ decays is presented where the J/ψ meson is reconstructed through its decay to an e +e − pair. 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-violating phase and lifetime parameters of the B0 s system are measured to be φs = 0.00 ± 0.28 ± 0.05 rad, ∆Γs = 0.115 ± 0.045 ± 0.011 ps−1 and Γs = 0.608 ± 0.018 ± 0.011 ps−1 where the first uncertainty is statistical and the second systematic. This is the first time that CP-violating parameters are measured in the B0 s → J/ψφ decay with an e +e − pair in the final state. The results are consistent with previous measurements in other channels and with the Standard Model predictions. |
| publishDate |
2021 |
| dc.date.none.fl_str_mv |
2021 |
| 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/2445/185481 |
| url |
https://hdl.handle.net/2445/185481 |
| 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/JHEP10(2021)060 Journal of High Energy Physics, 2021, vol. 2021, p. 1-28 https://doi.org/10.1007/JHEP10(2021)060 |
| dc.rights.none.fl_str_mv |
cc-by (c) LHCb Collaboration et al., 2021 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
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cc-by (c) LHCb Collaboration et al., 2021 https://creativecommons.org/licenses/by/4.0/ |
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openAccess |
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application/pdf |
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Springer Verlag |
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Springer Verlag |
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Articles publicats en revistes (Física Quàntica i Astrofísica) reponame:Dipòsit Digital de la UB instname:Universidad de Barcelona |
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Universidad de Barcelona |
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Dipòsit Digital de la UB |
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Dipòsit Digital de la UB |
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