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

Acharya S.
•
Adamova D.
•
Adler A.
altro
Zurlo N.
2020
  • journal article

Periodico
PHYSICS LETTERS. SECTION B
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.
DOI
10.1016/j.physletb.2020.135434
WOS
WOS:000541379800009
Archivio
http://hdl.handle.net/11368/2972117
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85088867295
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/2972117/1/PLB_805(2020)135434_1-15.pdf
Soggetti
  • Ion-Ion collision

Web of Science© citazioni
22
Data di acquisizione
Mar 12, 2024
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