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Proposed cuts for W/Z+gamma 2011

Proposed cuts for W/Z+gamma 2011. Zhijun Liang. GRL. Up to D5 now. http://atlasdqm.web.cern.ch/atlasdqm/grlgen/CombinedPerf/Egamma/Eg_standard_v5/data11_7TeV.periodAllYear_DetStatus-v11-pro08-01_Eg_standard.xml. Electron quality. electron->author()=1 or electron->author()=3

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Proposed cuts for W/Z+gamma 2011

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  1. Proposed cuts for W/Z+gamma 2011 Zhijun Liang

  2. GRL • Up to D5 now. • http://atlasdqm.web.cern.ch/atlasdqm/grlgen/CombinedPerf/Egamma/Eg_standard_v5/data11_7TeV.periodAllYear_DetStatus-v11-pro08-01_Eg_standard.xml

  3. Electron quality • electron->author()=1 or electron->author()=3 • OTX cleaning cut: require (el_OQ&1446)==0 • fabs(el_cl_eta)<2.47, fabs(el_cl_eta)<1.37 or fabs(el_cl_eta)>1.52 • passes tight EMID: require el_tight == 1 • ET> 25GeV

  4. Photon quality • OTX cleaning cut: require (ph_OQ&34214)==0 • Fabs(ph_cl_eta)<2.37, fabs(ph_cl_eta)<1.37 or fabs(ph_cl_eta)>1.52 • passes tight EMID: require el_tight == 1 • Ph_Etcone40_ptcorr<5GeV ( more study are needed!) • ET> 15GeV • DR(l;gamma)>0.7

  5. Jet cleaning • reject events with a bad jet in EM scale > 20 GeV https://twiki.cern.ch/twiki/bin/view/AtlasProtected/HowToCleanJets#Bad_jets_rel16_data

  6. Jet definition for jet counting • LC calibrated pT>30GeV • |eta|<4.4 • jet_akt4topoem_isUgly == 0 • Delta R (medium Electron/jet) >0.6, need to check 0.2<DR<0.6 • Delta R(tight isolated photon/jet)>0, need to check 0.2<DR<0.6

  7. W(enu)+gamma • GRL, Egamma stream, EF_e20_medium • >=1 tight electron • Veto 2nd medium electron • MET_Localhad_topo>25GeV(after jet cleaning) • Transverse mass >40GeV • >=1 tight isolated photon pT>15GeV • Exclude Z-like events • 80GeV<M(e;gamma) <100GeV • Three body transverse mass>100GeV

  8. Z(ee)+gamma • GRL, Egamma stream, EF_e20_medium • >=2 medium electron • M(ee)>40GeV • >=1 tight isolated photon pT>15GeV

  9. Z(nunu)+gamma • GRL, Egamma stream, EF_g40_loose • MET>45GeV • >=1 tight isolated photon pT>45GeV • No high pt lepton in the events.

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