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Preprint
Report number arXiv:2409.03496 ; LHCb-PAPER-2024-012 ; CERN-EP-2024-213 ; LHCB-PAPER-2024-012
Title Measurement of exclusive J/ψ and ψ(2S) production at s=13 TeV
Author(s) LHCb Collaboration  顯示全部 1096 名作者
Corporate author(s) LHCb Collaboration
Publication 2024
Imprint 09 Sep 2024
Number of pages 36
Note All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://lbfence.cern.ch/alcm/public/analysis/full-details/1801
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Keywords QCD ; forward physics ; hard scattering
Abstract Measurements are presented of the cross-section for the central exclusive production of J/ψμ+μ and ψ(2S)μ+μ processes in proton-proton collisions at s=13 TeV with 2016-2018 data. They are performed by requiring both muons to be in the LHCb acceptance (with pseudorapidity 2<ημ±<4.5) and mesons in the rapidity range 2.0<y<4.5. The integrated cross-section results are σJ/ψμ+μ(2.0<yJ/ψ<4.5,2.0<ημ±<4.5)=400±2±5±12pb, σψ(2S)μ+μ(2.0<yψ(2S)<4.5,2.0<ημ±<4.5)=9.40±0.15±0.13±0.27pb, where the uncertainties are statistical, systematic and due to the luminosity determination. In addition, a measurement of the ratio of ψ(2S) and J/ψ cross-sections, at an average photon-proton centre-of-mass energy of 1 TeV, is performed, giving σψ(2S)σJ/ψ=0.1763±0.0029±0.0008±0.0039, where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the involved branching fractions. For the first time, the dependence of the J/ψ and ψ(2S) cross-sections on the total transverse momentum transfer is determined in pp collisions and is found consistent with the behaviour observed in electron-proton collisions.
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Copyright/License Preprint: © 2024 CERN (License: CC-BY-4.0)
Submitted by lhcb.secretariat@cern.ch



 


 記錄創建於2024-09-09,最後更新在2024-12-17


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