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Report number arXiv:1805.04077 ; CERN-EP-2018-049
Title Prompt and non-prompt J/ψ and ψ(2S) suppression at high transverse momentum in 5.02 TeV Pb+Pb collisions with the ATLAS experiment
Author(s) ATLAS Collaboration  2907 人のオーサーを表示
Publication 2018-09-21
Imprint 11 May 2018
Number of pages 39
Note 39 pages in total, author list starting page 23, 9 figures, 3 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2016-07
In: Eur. Phys. J. C 78 (2018) 762
DOI 10.1140/epjc/s10052-018-6219-9
Subject category Particle Physics - Experiment ; hep-ex ; nucl-ex ; Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords relativistic heavy ion physics ; particle and resonance production ; experimental results
Abstract A measurement of J/ψ and ψ(2S) production is presented. It is based on a data sample from Pb+Pb collisions at sNN = 5.02 TeV and pp collisions at s = 5.02 TeV recorded by the ATLAS detector at the LHC in 2015, corresponding to an integrated luminosity of 0.42nb1 and 25pb1 in Pb+Pb and pp, respectively. The measurements of per-event yields, nuclear modification factors, and non-prompt fractions are performed in the dimuon decay channel for 9<pTμμ<40 GeV in dimuon transverse momentum, and 2.0<yμμ<2.0 in rapidity. Strong suppression is found in Pb+Pb collisions for both prompt and non-prompt J/ψ, as well as for prompt and non-prompt ψ(2S), increasing with event centrality. The suppression of prompt ψ(2S) is observed to be stronger than that of J/ψ, while the suppression of non-prompt ψ(2S) is equal to that of the non-prompt J/ψ within uncertainties, consistent with the expectation that both arise from \textit{b}-quarks propagating through the medium. Despite prompt and non-prompt J/ψ arising from different mechanisms, the dependence of their nuclear modification factors on centrality is found to be quite similar.
Related document supersedes: ATLAS-CONF-2016-109
Copyright/License publication: (License: CC-BY-4.0)
Preprint: © 2018-2025 CERN (License: CC-BY-4.0)



Corresponding record in: Inspire
Email contact: zhangzq@lal.in2p3.fr


 レコード 生成: 2018-05-11, 最終変更: 2024-06-29


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