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Analysis at CERN

Analysis at CERN . 2 particle correlation about Pb-Pb 3.52TeV. Kazuki Oshima. outline. 2 particle correlation Event mixing Cut Result. 2 particle correlation. Get ΔΦ Δη about all trigger and associate tpc track pairs. event mixing. Devide event about centrality and Z vertex

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Analysis at CERN

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  1. AnalysisatCERN 2 particle correlation about Pb-Pb 3.52TeV KazukiOshima

  2. outline • 2 particle correlation • Event mixing • Cut • Result

  3. 2 particle correlation • Get ΔΦ Δηabout all trigger and associate tpc track pairs

  4. event mixing • Devide event about centrality and Z vertex • Pool into 10 ×10Box • Become 3 events, get 2 particle correlation • 3 real part & 6 event mixing pairs • Calculate correlation function

  5. event selection • Use ESD file LHC11h(2) Pb-Pb 3.57 TeV • Run number • 168988,170269,169837,168108,169238,170207 • Event Cut • |Zvertex|<10cm • ESD Track cut • TPC acceptance |Δη|<0.9 • ITS matching

  6. result

  7. centrality dependence trigger 2-3GeV, associate 1-2GeV

  8. eta projection • 1.0<|Δη| <1.8 • Fit by Fourierseries

  9. vn plot (x,y):(centrality,vn) v1 v2 v3 v4 v5 v6

  10. trigger dependence Projection about Centrality 0-10%

  11. v2 trigger dependence 2-3GeV 3-4GeV 4-5GeV 5-6GeV centrality

  12. outlook • Look again fitting error • move associate pt fixed 1-2GeV this time • Calculate severally vn • Consider more event cut and qualitytrack cut • to remove something like v2 of eta direction

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