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Acharya, S.; Ahmad, S.; Altsybeev, I.; Averbeck, R.; Aziz, S.; Bauri, D.; Bercuci, A.; Bianchi, A.; Bielčíková, J.; Biswas, R.; Blair, J.T.; Borel, H.; Broz, M.; Bugnon, O.; Bysiak, S.A.; Chang, W.; Cheshkov, C.; Chujo, T.; Collu, A.; Corrales Morales, Y.; Costa, F.; Cunqueiro, L.; Danisch, M.C.; Das, P.; De Caro, A.; Deloff, A.; Ehlers, R.J.; Festanti, A.; Foertsch, S.; Galvan, C.D.; Garner, K.; Gotovac, S.; Groettvik, O.S.; Gupta, R.; Hannigan, R.; Harris, J.W.; Harton, A.; Hayashi, S.; Herrmann, F.; Huang, C.; Hughes, C.; Izucheev, V.; Janson, T.; Karavicheva, T.; Kim, D.; Kim, J.; Kim, T.; Klein, J.; Kluge, A.; Králik, I.; Kryshen, E.; Kurashvili, P.; Kurepin, A.B.; Kweon, M.J.; Kwon, J.Y.; Lee, J.; Li, X.; Li, X.L.; Lisa, M.A.; Majka, R.D.; Malaev, M.; Mandaglio, G.; Manzari, V.; Mao, Y.; Massacrier, L.; Masson, E.; Menchaca-Rocha, A.; Miake, Y.; Mihaylov, D.L.; Mrnjavac, T.; Nayak, T.K.; Nikolaev, S.; Pan, J.; Pathak, S.P.; Peng, X.; Pistone, D.; Quishpe, R.E.; Reygers, K.; Rogochaya, E.; Ronchetti, F.; Sahoo, S.; Scapparone, E.; Schmidt, H.R.; Schmidt, M.; Shimomura, M.; Snellman, T.W.; Sputowska, I.; Stocco, D.; Storetvedt, M.M.; Suire, C.; Tripathy, S.; Trubnikov, V.; Vercellin, E.; Villatoro Tello, A.; Vislavicius, V.; Wikne, J.; Yuncu, A.; Zampolli, C.; Zarochentsev, A.; Zimmermann, M.B.
Physics letters. B, 2020, Letnik: 805Journal Article
The inclusive J/ψ meson production in Pb–Pb collisions at a center-of-mass energy per nucleon–nucleon collision of sNN=5.02 TeV at midrapidity (|y|<0.9) is reported by the ALICE Collaboration. The measurements are performed in the dielectron decay channel, as a function of event centrality and J/ψ transverse momentum pT, down to pT=0. The J/ψ mean transverse momentum 〈pT〉 and rAA ratio, defined as 〈pT2〉PbPb/〈pT2〉pp, are evaluated. Both observables show a centrality dependence decreasing towards central (head-on) collisions. The J/ψ nuclear modification factor RAA exhibits a strong pT dependence with a large suppression at high pT and an increase to unity for decreasing pT. When integrating over the measured momentum range pT<10GeV/c, the J/ψRAA shows a weak centrality dependence. Each measurement is compared with results at lower center-of-mass energies and with ALICE measurements at forward rapidity, as well as to theory calculations. All reported features of the J/ψ production at low pT are consistent with a dominant contribution to the J/ψ yield originating from charm quark (re)combination.
