Suppression and Azimuthal Anisotropy of Prompt and Nonprompt J/ψ Production in PbPb Collisions at √s NN = 2.76 TeV
European Physical Journal C 2017
CERN international group of authors, Viesturs Veckalns

The nuclear modification factor R AA and the azimuthal anisotropy coefficient v 2 of prompt and nonprompt (i.e. those from decays of b hadrons) J / ψ mesons, measured from PbPb and pp collisions at sNN=2.76TeV at the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta p T > 6.5 GeV/c and rapidity | y| < 2.4 , extending down to p T = 3 GeV/c in the 1.6 < | y| < 2.4 range. The v 2 of prompt J / ψ is found to be nonzero, but with no strong dependence on centrality, rapidity, or p T over the full kinematic range studied. The measured v 2 of nonprompt J / ψ is consistent with zero. The R 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 p T in the fiducial range. The nonprompt J / ψR AA shows a suppression which becomes stronger as rapidity or p T increases. The v 2 and R AA of open and hidden charm, and of open charm and beauty, are compared.


DOI
10.1140/epjc/s10052-017-4781-1
Hipersaite
https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-017-4781-1

international group of authors, C., Veckalns, V. Suppression and Azimuthal Anisotropy of Prompt and Nonprompt J/ψ Production in PbPb Collisions at √s NN = 2.76 TeV. European Physical Journal C, 2017, Vol.77, No.4, 1.-10.lpp. ISSN 1434-6044. e-ISSN 1434-6052. Pieejams: doi:10.1140/epjc/s10052-017-4781-1

Publikācijas valoda
English (en)
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