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Alice Ohlson

Alice Ohlson

Senior lecturer

Alice Ohlson

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

Author

  • Acharya S.
  • J. Adolfsson
  • P. Christiansen
  • O. Matonoha
  • A. Nassirpour
  • A. Ohlson
  • A. Oskarsson
  • T. Richert
  • Oscar M Rueda
  • D. Silvermyr
  • E. Stenlund
  • Zurlo N.

Summary, in English

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. © 2020 European Organization for Nuclear Research

Department/s

  • Particle and nuclear physics
  • eSSENCE: The e-Science Collaboration

Publishing year

2020

Language

English

Publication/Series

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

805

Document type

Journal article

Publisher

Elsevier

Topic

  • Physical Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 0370-2693