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

GRLGRL

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 quality electron->author()=1 or electron->author()=3OTX 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

Photon quality 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 == 1Ph_Etcone40_ptcorr<5GeV ( more study are

needed!) ET> 15GeVDR(l;gamma)>0.7

Jet cleaning 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

Jet definition for jet Jet definition for jet counting counting LC calibrated pT>30GeV|eta|<4.4jet_akt4topoem_isUgly == 0Delta 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

W(enu)+gammaW(enu)+gammaGRL, Egamma stream,

EF_e20_medium>=1 tight electronVeto 2nd medium electron MET_Localhad_topo>25GeV(after jet

cleaning)Transverse mass >40GeV>=1 tight isolated photon pT>15GeVExclude Z-like events

◦80GeV<M(e;gamma) <100GeVThree body transverse mass>100GeV

Z(ee)+gammaZ(ee)+gammaGRL, Egamma stream,

EF_e20_medium>=2 medium electron M(ee)>40GeV>=1 tight isolated photon

pT>15GeV

Z(nunu)+gammaZ(nunu)+gammaGRL, Egamma stream,

EF_g40_looseMET>45GeV>=1 tight isolated photon

pT>45GeVNo high pt lepton in the events.