Skip to main content
eScholarship
Open Access Publications from the University of California

Centrality and transverse momentum dependence of inclusive J/ψ production at midrapidity in Pb–Pb collisions at sNN=5.02 TeV

  • Author(s): Acharya, S
  • Adamová, D
  • Adler, A
  • Adolfsson, J
  • Aggarwal, MM
  • Aglieri Rinella, G
  • Agnello, M
  • Agrawal, N
  • Ahammed, Z
  • Ahmad, S
  • Ahn, SU
  • Akindinov, A
  • Al-Turany, M
  • Alam, SN
  • Albuquerque, DSD
  • Aleksandrov, D
  • Alessandro, B
  • Alfanda, HM
  • Alfaro Molina, R
  • Ali, B
  • Ali, Y
  • Alici, A
  • Alkin, A
  • Alme, J
  • Alt, T
  • Altenkamper, L
  • Altsybeev, I
  • Anaam, MN
  • Andrei, C
  • Andreou, D
  • Andrews, HA
  • Andronic, A
  • Angeletti, M
  • Anguelov, V
  • Anson, C
  • Antičić, T
  • Antinori, F
  • Antonioli, P
  • Anwar, R
  • Apadula, N
  • Aphecetche, L
  • Appelshäuser, H
  • Arcelli, S
  • Arnaldi, R
  • Arratia, M
  • Arsene, IC
  • Arslandok, M
  • Augustinus, A
  • Averbeck, R
  • Aziz, S
  • Azmi, MD
  • Badalà, A
  • Baek, YW
  • Bagnasco, S
  • Bai, X
  • Bailhache, R
  • Bala, R
  • Baldisseri, A
  • Ball, M
  • Balouza, S
  • Barbera, R
  • Barioglio, L
  • Barnaföldi, GG
  • Barnby, LS
  • Barret, V
  • Bartalini, P
  • Barth, K
  • Bartsch, E
  • Baruffaldi, F
  • Bastid, N
  • Basu, S
  • Batigne, G
  • Batyunya, B
  • Bauri, D
  • Bazo Alba, JL
  • Bearden, IG
  • Bedda, C
  • Behera, NK
  • Belikov, I
  • Bell Hechavarria, ADC
  • Bellini, F
  • Bellwied, R
  • Belyaev, V
  • Bencedi, G
  • Beole, S
  • Bercuci, A
  • Berdnikov, Y
  • Berenyi, D
  • Bertens, RA
  • Berzano, D
  • Besoiu, MG
  • Betev, L
  • Bhasin, A
  • Bhat, IR
  • Bhat, MA
  • Bhatt, H
  • Bhattacharjee, B
  • Bianchi, A
  • Bianchi, L
  • Bianchi, N
  • et al.
Abstract

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<10 GeV/c, the J/ψ RAA 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.

Main Content
Current View