- Main
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.
Published Web Location
https://doi.org/10.1016/j.physletb.2020.135434Abstract
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.