Suppression and azimuthal anisotropy of prompt and nonprompt J/ψ production in PbPb collisions at √s[subscript NN] =2.76 TeV
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Khachatryan2017_Article_SuppressionAndAzimuthalAnisotr.pdf
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Author(s)
Abercrombie, Daniel Robert
Allen, Brandon Leigh
Apyan, Aram
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Bierwagen, Katharina
Brandt, Stephanie Akemi
Cali, Ivan Amos
Demiragli, Zeynep
Date Issued
April 2017
Journal
The European Physical Journal C
Publisher
Springer Nature
Citation
CMS Collaboration, et al. “Suppression and Azimuthal Anisotropy of Prompt and Nonprompt J/ψ Production in PbPb Collisions at √s[subscript NN] = 2.76 TeV.” The European Physical Journal C, vol. 77, no. 4, Apr. 2017. © 2017 CERN for the benefit of the CMS collaboration.
Version
Final published version
Abstract
The nuclear modification factor R[subscript AA] and the azimuthal anisotropy coefficient v[subscript 2] of prompt and nonprompt (i.e. those from decays of b hadrons) J/ψ mesons, measured from PbPb and pp collisions at √s[subscript NN] = 2.76TeV at the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta p[subscript T]> 6.5 GeV/c and rapidity | y| < 2.4 , extending down to p[subscript T] = 3 GeV/c in the 1.6 < | y| < 2.4 range. The v[subscript 2] of prompt J/ ψ is found to be nonzero, but with no strong dependence on centrality, rapidity, or pTover the full kinematic range studied. The measured v[subscript 2] of nonprompt J/ψ is consistent with zero. The R[subscript AA] of prompt J/ψ exhibits a suppression that increases from peripheral to central collisions but does not vary strongly as a function of either y or pTin the fiducial range. The nonprompt J/ψ R[subscript AA] shows a suppression which becomes stronger as rapidity or p[subscript T] increases. The v[subscript 2] and R[subscript AA] of open and hidden charm, and of open charm and beauty, are compared.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1140/EPJC/S10052-017-4781-1
