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Article
Report number arXiv:2402.05523 ; LHCb-PAPER-2023-046 ; CERN-EP-2024-019 ; LHCB-PAPER-2023-046
Title Observation of the B+cJ/ψπ+π0 decay
Author(s) LHCb Collaboration  Prikaži svih 1099 autora
Corporate Author(s) LHCb Collaboration
Publication 2024-04-30
Imprint 26 Feb 2024
Number of pages 30
Note 30 pages, 6 figures. All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2023-046.html (LHCb public pages)
In: JHEP 2404 (2024) 151
DOI 10.1007/JHEP04(2024)151
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Abstract The first observation of the B+cJ/ψπ+π0 decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of 9 fb1, collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV. The ratio of its branching fraction relative to the B+cJ/ψπ+ channel is measured to be B(B+cJ/ψπ+π0)B(B+cJ/ψπ+)=2.80±0.15±0.11±0.16, where the first uncertainty is statistical, the second systematic and the third related to imprecise knowledge of the branching fractions for B+J/ψK+ and B+J/ψK+ decays, which are used to determine the π0 detection efficiency. The π+π0 mass spectrum is found to be consistent with the dominance of an intermediate ρ+ contribution in accordance with a model based on QCD factorisation.
Copyright/License Preprint: © 2024-2025 CERN (License: CC-BY-4.0)
Publication: © 2024-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³



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Email contact: lhcb.secretariat@cern.ch


 Zapis kreiran 2024-02-26, zadnja izmjena 2024-10-18


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