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Inclusive, prompt and non-prompt J/$\psi$ production at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV

The ALICE collaboration
JHEP 1507 (2015) 051, 2015

Abstract (data abstract)
CERN-LHC. The transverse momentum $p_{\rm T}$ dependence of the nuclear modification factor $R_{\rm AA}$ and the centrality dependence of the average transverse momentum $\langle p_{\rm T} \rangle$ for inclusive J/$\psi$ have been measured with ALICE for Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV in the e+e- decay channel at mid-rapidity ($|y|$ < 0.8). The $\langle p_{\rm T} \rangle$ is significantly smaller than the one observed for pp collisions at the same centre-of-mass energy. Consistently, an increase of $R_{\rm AA}$ is observed towards low $p_{\rm T}$. These observations might be indicative of a sizable contribution of charm quark coalescence to the J/$\psi$ production. Additionally, the fraction of non-prompt J/$\psi$ from beauty hadron decays, $f_{\rm B}$, has been determined in the region 1.5 < $p_{\rm T}$ < 10 GeV/$c$ in three centrality intervals. No significant centrality dependence of fB is observed. Finally, the $R_{\rm AA}$ of non-prompt J/$\psi$ is discussed and compared with model predictions. The nuclear modification in the region 4.5 < $p_{\rm T}$ < 10 GeV/$c$ is found to be stronger than predicted by most models.

  • Table 1

    Data from Figure 4

    10.17182/hepdata.68881.v1/t1

    The average transverse momentum $\langle p_{\rm T} \rangle$ of inclusive J/$\psi$ measured at mid-rapidity in centrality selected Pb-Pb collisions as...

  • Table 2

    10.17182/hepdata.68881.v1/t2

    The average transverse momentum squared $\langle p_{\rm T}^{2} \rangle$ of inclusive J/$\psi$ measured at mid-rapidity in centrality selected Pb-Pb collisions...

  • Table 3

    Data from Figure 5

    10.17182/hepdata.68881.v1/t3

    The ratio $\langle p_{\rm T}^{2} \rangle_{\rm AA} / \langle p_{\rm T}^{2} \rangle_{\rm pp}$ of inclusive J/$\psi$ measured at mid-rapidity in...

  • Table 4

    Data from Figure 6

    10.17182/hepdata.68881.v1/t4

    The nuclear modification factor $R_{\rm AA}$ of inclusive J/$\psi$ measured at mid-rapidity in Pb-Pb collisions (0-40 % most central) as...

  • Table 5

    Data from Figure 6

    10.17182/hepdata.68881.v1/t5

    The nuclear modification factor $R_{\rm AA}$ of inclusive J/$\psi$ measured at mid-rapidity in Pb-Pb collisions (0-50 % most central) as...

  • Table 6

    Data from Figure 7

    10.17182/hepdata.68881.v1/t6

    The fraction of J/$\psi$ from beauty hadron decays $f_{\rm B}$ at mid-rapidity in the $p_{\rm T}$ interval 1.5 - 10...

  • Table 7

    Data from Figure 7

    10.17182/hepdata.68881.v1/t7

    The fraction of J/$\psi$ from beauty hadron decays $f_{\rm B}$ at mid-rapidity as a function of transverse momentum $p_{\rm T}$.

  • Table 8

    Data from Figure 8

    10.17182/hepdata.68881.v1/t8

    The nuclear modification factor $R_{\rm AA}$ of non-prompt J/$\psi$ at mid-rapidity as a function of transverse momentum $p_{\rm T}$.

  • Table 9

    10.17182/hepdata.68881.v1/t9

    The nuclear modification factor $R_{\rm AA}$ of prompt J/$\psi$ at mid-rapidity as a function of transverse momentum $p_{\rm T}$.

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