Quarkonium measurements in nucleus-nucleus collisions with ALICE

$J/\psi$ production in Au+Au collisions at $\sqrt{s} = 54.4$ GeV

“…The theoretical calculation of the total / AA is shown as the solid line [19], and the blue dash-dotted line represents the suppressed primordial production due to CNM effects and dissociation in the QGP medium, while the red dashed line denotes the regeneration contribution. The theoretical calculation is consistent with the observed energy dependence, indicating that the PoS(CHARM2020)037 The AA of / as a function of collision energy for central collisions [9][10][11][12][13][14], in comparison with model calculations [19]. The error bars represent the statistical uncertainties and the boxes represent the systematic uncertainties, including those from + baselines and uncertainties from AA .…”

“…Various measurements of the / meson production in high-energy heavy-ion collisions have been performed in different collision systems at SPS, RHIC, and LHC energies, and suppressions of the / production have been observed by different collaborations [9][10][11][12][13][14]. A smaller suppression of the / meson production at LHC energies [11,14], compared to that at 200 GeV [13], is seen because of the increased regeneration contribution. In previous measurements by the STAR Collaboration [12], the collision energy ( √ NN ) dependence of the / suppression between 39 and 200 GeV was studied and found to be insignificant within uncertainties.…”

“…Figure 4:The AA of / as a function of collision energy for central collisions[9][10][11][12][13][14], in comparison with model calculations[19]. The error bars represent the statistical uncertainties and the boxes represent the systematic uncertainties, including those from + baselines and uncertainties from AA .…”

Recent J/ψ results in p+p and Au+Au collisions from STAR

“…Therefore, the cross-section of quarkonia would be reduced in heavy-ion collisions with respect to those in p+p collisions scaled by the number of binary nucleonnucleon collisions, N coll , at the same energy. Suppression of the J/ψ meson production has been observed in different collision systems at SPS, RHIC, and LHC energies [2][3][4][5][6][7]. In previous measurements by the STAR Collaboration [5], the collision energy ( √ s NN ) dependence of the J/ψ suppression between 39 and 200 GeV was studied and found to be insignificant within uncertainties.…”

“…Measuring the J/ψ production within a jet at RHIC will provide complementary information on the J/ψ production mechanism. and 200 GeV are from [5,6]; the ALICE points at √ s NN = 2.76 and 5.02 TeV are from [4,7].…”