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Article
Report number arXiv:2303.09443 ; LHCb-PAPER-2022-054 ; CERN-EP-2023-022
Title Observation of the $B^+ \rightarrow J/\psi \eta^{\prime} K^+$ decay
Related titleObservation of the B$^{+}$→ Jψη′K$^{+}$ decay
Author(s) LHCb Collaboration  Показване на всичките 1072 автора
Corporate Author(s) LHCb Collaboration
Publication 2023-08-25
Imprint 17 Mar 2023
Number of pages 19
Note All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-054.html (LHCb public pages)
In: JHEP 2308 (2023) pp.174
DOI 10.1007/JHEP08(2023)174
10.1007/JHEP10(2023)150 (erratum)
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; QCD ; exotics ; B physics ; charm physics ; quarkonium ; spectroscopy ; branching fraction
Abstract The $B^+ \rightarrow J/\psi \eta^{\prime} K^+$ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13TeV, corresponding to a total integrated luminosity of 9fb$^{-1}$. The branching fraction of this decay is measured relative to the known branching fraction of the $B^+ \rightarrow \psi(2S) K^+$ decays and found to be $$ \frac{\mathcal{B}( B^+ \rightarrow J/\psi \eta^{\prime}K^+)} {\mathcal{B}( B^+ \rightarrow \psi(2S)K^+) } = \left(4.91\pm 0.47\pm0.29\pm0.07\right)\times10^{-2}, $$ where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the $J/\psi\eta^{\prime}$ mass distribution is performed and no signal of intermediate resonances is observed.
Copyright/License Preprint: © 2023-2025 CERN (License: CC-BY-4.0)
Publication: © 2023-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³



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 Записът е създаден на 2023-03-17, последна промяна на 2024-12-03


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