Name: Prompt and non-prompt J$/\psi$ production at midrapidity in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
Creator: ALICE Collaboration
Published: 2024

Abstract (data abstract)

The transverse momentum ($p_T$) and centrality dependence of the nuclear modification factor $R_{AA}$ of prompt and non-prompt J/$\psi$, the latter originating from the weak decays of beauty hadrons, have been measured by the ALICE collaboration in Pb--Pb collisions at 5.02 TeV. The measurements are carried out through the e^+e^- decay channel at midrapidity ($|y| < 0.9$) in the transverse momentum region $1.5 < $p_T$ < 10$~\GeVc. Both prompt and non-prompt J/$\psi$ measurements indicate a significant suppression for $p_T$ $>$ 5~\GeVc, which becomes stronger with increasing collision centrality. The results are consistent with similar LHC measurements in the overlapping $p_T$ intervals, and cover the kinematic region down to $p_T$ = 1.5 \GeVc at midrapidity, not accessible by other LHC experiments. The suppression of prompt J/$\psi$ in central and semicentral collisions exhibits a decreasing trend towards lower transverse momentum, described within uncertainties by models implementing J/$\psi$ production from recombination of c and $\overline{\rm c}$ quarks produced independently in different partonic scatterings. At high transverse momentum, transport models including quarkonium dissociation are able to describe the suppression for prompt J/$\psi$. For non-prompt J/$\psi$, the suppression predicted by models including both collisional and radiative processes for the computation of the beauty-quark energy loss inside the quark--gluon plasma is consistent with measurements within uncertainties.

Table 1

Data from figure 2 (left and right)

10.17182/hepdata.146723.v1/t1

Non-prompt J/$\psi$ fraction as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 0-10%
Table 2

Data from figure 2 (right)

10.17182/hepdata.146723.v1/t2

Non-prompt J/$\psi$ fraction as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 10-30%
Table 3

Data from figure 2 (right)

10.17182/hepdata.146723.v1/t3

Non-prompt J/$\psi$ fraction as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 30-50%
Table 4

Data from figure 3

10.17182/hepdata.146723.v1/t4

Non-prompt J/$\psi$ fraction as a function of average number of participants in Pb-Pb at 5.02 TeV
Table 5

Data from figure 4

10.17182/hepdata.146723.v1/t5

Non-prompt J/$\psi$ yields as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 0-10%
Table 6

Data from figure 4

10.17182/hepdata.146723.v1/t6

Prompt J/$\psi$ yields as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 0-10%
Table 7

Data from figure 5 (top left)

10.17182/hepdata.146723.v1/t7

Prompt J/$\psi$ nuclear modification factor as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 0-10%. Global uncertainty...
Table 8

Data from figure 5 (top right)

10.17182/hepdata.146723.v1/t8

Prompt J/$\psi$ nuclear modification factor as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 10-30%. Global uncertainty...
Table 9

Data from figure 5 (bottom left)

10.17182/hepdata.146723.v1/t9

Prompt J/$\psi$ nuclear modification factor as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 30-50%. Global uncertainty...
Table 10

Data from figure 5 (bottom right)

10.17182/hepdata.146723.v1/t10

Prompt J/$\psi$ nuclear modification factor as a function of average number of participants in Pb-Pb at 5.02 TeV. Global uncertainty...
Table 11

Data from figure 6 (top left)

10.17182/hepdata.146723.v1/t11

Non-prompt J/$\psi$ nuclear modification factor as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 0-10%. Global uncertainty...
Table 12

Data from figure 6 (top right)

10.17182/hepdata.146723.v1/t12

Non-prompt J/$\psi$ nuclear modification factor as a function of transverse momentum in Pb-Pb at 5.02 TeV,, centrality 10-30%. Global uncertainty...
Table 13

Data from figure 6 (bottom left)

10.17182/hepdata.146723.v1/t13

Non-prompt J/$\psi$ nuclear modification factor as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 30-50%. Global uncertainty...
Table 14

Data from figure 6 (bottom right)

10.17182/hepdata.146723.v1/t14

Non-prompt J/$\psi$ nuclear modification factor as a function of average number of participants in Pb-Pb at 5.02 TeV. Global uncertainty...
Table 15

Data from figure 7 (right)

10.17182/hepdata.146723.v1/t15

Prompt J/$\psi$ yields as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 30-50%
Table 16

Data from figure 10 (right)

10.17182/hepdata.146723.v1/t16

Non-prompt J/$\psi$ yields as a function of transverse momentum in Pb-Pb at 5.02 TeV, centrality 30-50%

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