Study of Isolated-Photon + Jet Correlations in PbPb and pp Collisions at sNN=5.02TeV\sqrt{s_{NN}} = 5.02\:\mathrm{TeV}

Collaboration
2016
18 pages
Report number:
  • CMS-PAS-HIN-16-002
Experiments:

Citations per year

201520162017011
Abstract:
Measurements of correlations in isolated-photon and jet pairs in pp and PbPb collisions at sNN=5.02 TeV\sqrt{s_{NN}} = 5.02~\mathrm{TeV} are reported. Jets are reconstructed with an anti-kTk_\mathrm{T} clustering algorithm with a distance parameter of 0.3. For events containing a leading isolated photon with transverse momentum pTγ>40 GeV/cp_\mathrm{T}^\gamma > 40~\mathrm{GeV}/c and an associated jet with pTJet>30 GeV/cp_\mathrm{T}^\mathrm{Jet} > 30~\mathrm{GeV}/c, the photon + jet transverse momentum balance in PbPb collisions is studied as a function of collision centrality and pTγp_\mathrm{T}^\gamma. The results are compared to pp reference data collected at the same collision energy. A significant decrease in the ratio pTJet/pTγp_\mathrm{T}^\mathrm{Jet}/p_\mathrm{T}^\gamma relative to that in the pp reference is observed.
Note:
  • Preliminary results
  • Data
  • heavy ion: scattering
  • lead
  • p p: scattering
  • p p: colliding beams
  • photon: associated production
  • jet: pair production
  • jet: transverse momentum
  • photon: transverse momentum
  • jet: correlation