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y-differential coherent J/psi photoproduction cross section at pT < 0.3 GeV/c in the centrality range (70-90)% in Pb-Pb collisions at 5.02 TeV compared with one set of models of different scenarios

Figure Information
Scope: PWG
PWG-DQ (Dileptons and Quarkonia)
Energy
5.02 TeV
System
Pb-Pb
Figure Group
y-differential J/psi photoproduction in Pb-Pb (QM2023)
Figure Image
Figure image (.eps)
preliminary_cohsigma7090pt0-0.3_gbw_only.eps
Figure image (.pdf)
preliminary_cohsigma7090pt0-0.3_gbw_only.pdf
Figure Caption

y-differential coherent J/psi photoproduction cross section at pT < 0.3 GeV/c in the centrality range (70-90)% in Pb-Pb collisions at 5.02 TeV. The data is compared with three scenarios of the models GBW/IIM. Scenario (1) uses the UPC calculations. Scenario (2) includes a modification of the photon flux. Scenario (3) includes both modifications of the photon flux and the photo-nucleus cross-section.

Detail description
  • Keywords: coherent, photoproduction, nuclear overlap
  • Data sample and rec. pass:
    LHC15o_muon_calo_pass1
    LHC18q_muon_calo_pass3
    LHC18q_muon_calo_pass3
  • Event cuts: physics selection and CMUL7-B-NOPF-MUFAST (CMUL7) trigger
  • Track cuts:  -4 < eta_{mu} < -2.5,  2 < theta_{abs} < 10 degree, matching track in tracking-trigger chambers, pxDCA cut.
  • Dimuon cut: -4 < y < -2.5