J/ψ suppression at forward rapidity in Pb–Pb collisions at sNN=5.02 TeV

Suppression of quarkonia in PbPb collisions at $\sqrt{{s}_{{NN}}}$ = 5.02 TeV

“…At 5.02 TeV, the total PbPb cross section, σ tot PbPb , is 7.7 b [48]. Figure 5(c) shows the same for the low p T and forward rapidity compared with the measurement by ALICE experiment [19]. At low p T , regeneration of J/ψ gives dominant contribution which overcomes the strong suppression by gluon dissociation.…”

“…The values of gluon-quarkonia cross section (σ D ) and the initial temperature T 0 can have uncertainties and will affect the results. [16,17,19]. The global uncertainty in R AA is shown as a band around the line at 1.…”

“…The ALICE results show that nuclear modification factor of J/ψ at low p T (p T < 12 GeV/c) has almost no collision centrality dependence except in the most peripheral region where it reaches almost unity. The R AA of J/ψ mesons decreases substantially as a function of p T in the ALICE experiment [18,19]. The ALICE measurements also give a hint for an increase of R AA between √ s N N = 2.76 and 5.02 TeV in the intermediate p T region, 2 < p T < 6 GeV/c.…”

“…There have been a large number of studies on this phenomenon both theoretically and experimentally [3,6,7] enriching our understanding on quarkonia as probes of QGP. The J/ψ meson was measured at the SPS, in PbPb and In-In interactions at the centre-of-mass energy per nucleon pair √ s N N = 17.2 GeV [8,9], at RHIC in AuAu interactions at √ s N N = 200 GeV [10,11,12], and finally at the LHC, in PbPb collisions at √ s N N = 2.76 and 5.02 TeV [13,14,15,16,17,18,19,20]. The suppression of J/ψ observed at SPS was termed as 'anomalous' J/ψ suppression.…”

“…The ALICE experiment measured the nuclear modification factor of J/ψ mesons in the forward rapidity (2.5< y <4.0) range at √ s N N =2.76 and √ s N N =5.02 TeV [18,19] with J/ψ transverse momentum starting from 0.3 GeV/c. The ALICE results show that nuclear modification factor of J/ψ at low p T (p T < 12 GeV/c) has almost no collision centrality dependence except in the most peripheral region where it reaches almost unity.…”