First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays

LHCb Collaboration; Alfonso Albero, Alejandro; Camboni, Alessandro; Fernandez-tenllado Arribas, J.M.; García Moreno, Paula; Garrido Beltrán, Lluís; Gironella Gironell, P.; Gomez Fernandez, S.; Graciani Díaz, Rodrigo; Graugés Pous, Eugeni; Lobo Salvia, A.; Manera Escalero, R.; Mauricio, J.; Vazquez Gomez, R.; Sanchez Gonzalo, D.; Valls Canudas, Núria; Marin Benito, Carla

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...

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Autores:	LHCb Collaboration, Alfonso Albero, Alejandro, Camboni, Alessandro, Fernandez-tenllado Arribas, J.M., García Moreno, Paula, Garrido Beltrán, Lluís, Gironella Gironell, P., Gomez Fernandez, S., Graciani Díaz, Rodrigo, Graugés Pous, Eugeni, Lobo Salvia, A., Manera Escalero, R., Mauricio, J., Vazquez Gomez, R., Sanchez Gonzalo, D., Valls Canudas, Núria, Marin Benito, Carla
Tipo de recurso:	artículo
Estado:	Versión publicada
Fecha de publicación:	2021
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:2445/185479
Acceso en línea:	https://hdl.handle.net/2445/185479
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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spelling	First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decaysLHCb CollaborationAlfonso Albero, AlejandroCamboni, AlessandroFernandez-tenllado Arribas, J.M.García Moreno, PaulaGarrido Beltrán, LluísGironella Gironell, P.Gomez Fernandez, S.Graciani Díaz, RodrigoGraugés Pous, EugeniLobo Salvia, A.Manera Escalero, R.Mauricio, J.Vazquez Gomez, R.Sanchez Gonzalo, D.Valls Canudas, NúriaMarin 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.Società Italiana di Fisica & Springer Verlag2022202220212022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion28 p.application/pdfhttps://hdl.handle.net/2445/185479Articles 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/s10052-021-09711-7European Physical Journal C, 2021, vol. 2021, p. 1-28https://doi.org/10.1140/epjc/s10052-021-09711-7cc-by (c) LHCb Collaboration et al., 2021https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1854792026-05-29T05:05:01Z
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 Camboni, Alessandro Fernandez-tenllado Arribas, J.M. García Moreno, Paula Garrido Beltrán, Lluís Gironella Gironell, P. Gomez Fernandez, S. Graciani Díaz, Rodrigo Graugés Pous, Eugeni Lobo Salvia, A. Manera Escalero, R. Mauricio, J. Vazquez Gomez, R. Sanchez Gonzalo, D. Valls Canudas, Núria Marin Benito, Carla
author	LHCb Collaboration
author_facet	LHCb Collaboration Alfonso Albero, Alejandro Camboni, Alessandro Fernandez-tenllado Arribas, J.M. García Moreno, Paula Garrido Beltrán, Lluís Gironella Gironell, P. Gomez Fernandez, S. Graciani Díaz, Rodrigo Graugés Pous, Eugeni Lobo Salvia, A. Manera Escalero, R. Mauricio, J. Vazquez Gomez, R. Sanchez Gonzalo, D. Valls Canudas, Núria Marin Benito, Carla
author_role	author
author2	Alfonso Albero, Alejandro Camboni, Alessandro Fernandez-tenllado Arribas, J.M. García Moreno, Paula Garrido Beltrán, Lluís Gironella Gironell, P. Gomez Fernandez, S. Graciani Díaz, Rodrigo Graugés Pous, Eugeni Lobo Salvia, A. Manera Escalero, R. Mauricio, J. Vazquez Gomez, R. Sanchez Gonzalo, D. Valls Canudas, Núria Marin Benito, Carla
author2_role	author author author author author 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 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 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/2445/185479
url	https://hdl.handle.net/2445/185479
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/s10052-021-09711-7 European Physical Journal C, 2021, vol. 2021, p. 1-28 https://doi.org/10.1140/epjc/s10052-021-09711-7
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
rights_invalid_str_mv	cc-by (c) LHCb Collaboration et al., 2021 https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv	openAccess
dc.format.none.fl_str_mv	28 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	15,811543

First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays

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