Observation of the decays B0 (s) → Ds1(2536)∓K±
This paper reports the observation of the decays B0 (s) → Ds1(2536)∓K± using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1 . The branching fractions of these decays are measured relative to the normalisation channel B0 → D 0K+K−. T...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dnet:dau_________::524d016f2a78bab3b5bbc9d659c16cc7 |
| Acceso en línea: | https://hdl.handle.net/20.500.14342/6449 https://doi.org/10.1007/JHEP10(2023)106 |
| Access Level: | acceso abierto |
| Palabra clave: | B Physics Branching fraction Flavour Physics Hadron-Hadron Scattering Decay Processes Experimental Nuclear Physics Nuclear Physics Gran col·lisionador d'hadrons 51 53 539 |
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Observation of the decays B0 (s) → Ds1(2536)∓K±Valls Canudas, NúriaCalvo Gomez, MiriamVilasis-Cardona, XavierGolobardes Ribé, ElisabetLHCb Collaboration - CERNB PhysicsBranching fractionFlavour PhysicsHadron-Hadron ScatteringDecay ProcessesExperimental Nuclear PhysicsNuclear PhysicsGran col·lisionador d'hadrons5153539This paper reports the observation of the decays B0 (s) → Ds1(2536)∓K± using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1 . The branching fractions of these decays are measured relative to the normalisation channel B0 → D 0K+K−. The Ds1(2536)− meson is reconstructed in the D ∗ (2007)0K− decay channel and the products of branching fractions are measured to be B(B 0 s → Ds1(2536)∓K±) × B(Ds1(2536)−→ D ∗ (2007)0K−) = (2.49 ± 0.11 ± 0.12 ± 0.25 ± 0.06) × 10−5 , B(B 0→ Ds1(2536)∓K±) × B(Ds1(2536)−→ D ∗ (2007)0K−) = (0.510 ± 0.021 ± 0.036 ± 0.050) × 10−5 . The first uncertainty is statistical, the second systematic, and the third arises from the uncertainty of the branching fraction of the B0 → D 0K+K− normalisation channel. The last uncertainty in the B0 s result is due to the limited knowledge of the fragmentation fraction ratio, fs/fd. The significance for the B0 s and B0 signals is larger than 10 σ. The ratio of the helicity amplitudes which governs the angular distribution of the Ds1(2536)− → D ∗ (2007)0K− decay is determined from the data. The ratio of the S- and D-wave amplitudes is found to be 1.11±0.15±0.06 and the phase difference between them 0.70 ± 0.09 ± 0.04 rad, where the first uncertainty is statistical and the second systematic.info:eu-repo/semantics/publishedVersionSpringer NatureUniversitat Ramon Llull. La SalleCERN2026202620232023info:eu-repo/semantics/article25 p.application/pdfhttps://hdl.handle.net/20.500.14342/6449https://doi.org/10.1007/JHEP10(2023)106reponame:DAU Arxiu Digital de la Universitat Ramon Llullinstname:Universitat Ramon Llull (URL)InglésJournal of High Energy Physics, 2023, Vol. 2023, 106© CERNAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dnet:dau_________::524d016f2a78bab3b5bbc9d659c16cc72026-06-21T06:40:37Z |
| dc.title.none.fl_str_mv |
Observation of the decays B0 (s) → Ds1(2536)∓K± |
| title |
Observation of the decays B0 (s) → Ds1(2536)∓K± |
| spellingShingle |
Observation of the decays B0 (s) → Ds1(2536)∓K± Valls Canudas, Núria B Physics Branching fraction Flavour Physics Hadron-Hadron Scattering Decay Processes Experimental Nuclear Physics Nuclear Physics Gran col·lisionador d'hadrons 51 53 539 |
| title_short |
Observation of the decays B0 (s) → Ds1(2536)∓K± |
| title_full |
Observation of the decays B0 (s) → Ds1(2536)∓K± |
| title_fullStr |
Observation of the decays B0 (s) → Ds1(2536)∓K± |
| title_full_unstemmed |
Observation of the decays B0 (s) → Ds1(2536)∓K± |
| title_sort |
Observation of the decays B0 (s) → Ds1(2536)∓K± |
| dc.creator.none.fl_str_mv |
Valls Canudas, Núria Calvo Gomez, Miriam Vilasis-Cardona, Xavier Golobardes Ribé, Elisabet LHCb Collaboration - CERN |
| author |
Valls Canudas, Núria |
| author_facet |
Valls Canudas, Núria Calvo Gomez, Miriam Vilasis-Cardona, Xavier Golobardes Ribé, Elisabet LHCb Collaboration - CERN |
| author_role |
author |
| author2 |
Calvo Gomez, Miriam Vilasis-Cardona, Xavier Golobardes Ribé, Elisabet LHCb Collaboration - CERN |
| author2_role |
author author author author |
| dc.contributor.none.fl_str_mv |
Universitat Ramon Llull. La Salle CERN |
| dc.subject.none.fl_str_mv |
B Physics Branching fraction Flavour Physics Hadron-Hadron Scattering Decay Processes Experimental Nuclear Physics Nuclear Physics Gran col·lisionador d'hadrons 51 53 539 |
| topic |
B Physics Branching fraction Flavour Physics Hadron-Hadron Scattering Decay Processes Experimental Nuclear Physics Nuclear Physics Gran col·lisionador d'hadrons 51 53 539 |
| description |
This paper reports the observation of the decays B0 (s) → Ds1(2536)∓K± using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1 . The branching fractions of these decays are measured relative to the normalisation channel B0 → D 0K+K−. The Ds1(2536)− meson is reconstructed in the D ∗ (2007)0K− decay channel and the products of branching fractions are measured to be B(B 0 s → Ds1(2536)∓K±) × B(Ds1(2536)−→ D ∗ (2007)0K−) = (2.49 ± 0.11 ± 0.12 ± 0.25 ± 0.06) × 10−5 , B(B 0→ Ds1(2536)∓K±) × B(Ds1(2536)−→ D ∗ (2007)0K−) = (0.510 ± 0.021 ± 0.036 ± 0.050) × 10−5 . The first uncertainty is statistical, the second systematic, and the third arises from the uncertainty of the branching fraction of the B0 → D 0K+K− normalisation channel. The last uncertainty in the B0 s result is due to the limited knowledge of the fragmentation fraction ratio, fs/fd. The significance for the B0 s and B0 signals is larger than 10 σ. The ratio of the helicity amplitudes which governs the angular distribution of the Ds1(2536)− → D ∗ (2007)0K− decay is determined from the data. The ratio of the S- and D-wave amplitudes is found to be 1.11±0.15±0.06 and the phase difference between them 0.70 ± 0.09 ± 0.04 rad, where the first uncertainty is statistical and the second systematic. |
| publishDate |
2023 |
| dc.date.none.fl_str_mv |
2023 2023 2026 2026 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/20.500.14342/6449 https://doi.org/10.1007/JHEP10(2023)106 |
| url |
https://hdl.handle.net/20.500.14342/6449 https://doi.org/10.1007/JHEP10(2023)106 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Journal of High Energy Physics, 2023, Vol. 2023, 106 |
| 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/ |
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openAccess |
| dc.format.none.fl_str_mv |
25 p. application/pdf |
| dc.publisher.none.fl_str_mv |
Springer Nature |
| publisher.none.fl_str_mv |
Springer Nature |
| 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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