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Article
Report number arXiv:2007.11292 ; LHCb-PAPER-2020-012 ; CERN-EP-2020-124 ; LHCB-PAPER-2020-012
Title First observation of the decay Λ0bηc(1S)pK
Related titleFirst observation of the decay Λ0bηc(1S)pK
Author(s) LHCb Collaboration  Show all 995 authors
Corporate Author(s) LHCb Collaboration
Publication 2020-12-23
Imprint 23 Jul 2020
Number of pages 12
Note All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-012.html (LHCb public pages)
In: Phys. Rev. D 102 (2020) 112012
DOI 10.1103/PhysRevD.102.112012 (publication)
Subject category Particle Physics - Experiment ; hep-ex
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; exotics ; B physics ; spectroscopy ; branching fraction
Abstract The decay Λ0bηc(1S)pK is observed for the first time using a data sample of proton-proton collisions, corresponding to an integrated luminosity of 5.5 fb1, collected with the LHCb experiment at a centre-of-mass energy of 13 TeV. The branching fraction of the decay is measured, using the Λ0bJ/ψpK decay as a normalisation mode, to be B(Λ0bηc(1S)pK)=(1.06±0.16±0.06+0.220.19)×104, where the quoted uncertainties are statistical, systematic and due to external inputs, respectively. A study of the ηc(1S)p mass spectrum is performed to search for the Pc(4312)+ pentaquark state. No evidence is observed and an upper limit of B(Λ0bPc(4312)+K)×B(Pc(4312)+ηc(1S)p)B(Λ0bηc(1S)pK)<0.24 is obtained at 95% confidence level.
Copyright/License preprint: © 2020-2024 CERN (License: CC-BY-4.0)
publication: © 2020-2024 CERN (License: CC-BY-4.0), sponsored by SCOAP³



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 Record created 2020-07-23, last modified 2024-10-02


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