Learning the Ele VID method and correlated information, follow https://twiki.cern.ch/twiki/bin/view/Main/VIDTutorial2017:
Getting the code //install release
scram project -n CMSSW-8-0-26-p1-VID CMSSW CMSSW_8_0_26_patch1
cd CMSSW-8-0-26-p1-VID/src
cmsenv
voms-proxy-init -voms cms
copy needed cmssw code
git cms-init
git cms-addpkg RecoEgamma/ElectronIdentification
git cms-addpkg PhysicsTools/SelectorUtils
git clone https://github.com/ikrav/EgammaWork.git
cd EgammaWork/
git checkout ntupler_and_VID_demos_8.0.3
cd ../
and change the input rootfile in runElectrons_VID_CutBased_Summer16_80X_demo.py:
inputFilesMiniAOD = cms.untracked.vstring('file:/eos/cms/store/mc/RunIISummer16MiniAODv2/DY2JetsToLL_M-50_TuneCUETP8M1_13TeV-madgraphMLM-pythia8/MINIAODSIM/PUMoriond17_80X_mcRun2_asymptotic_2016_TrancheIV_v6-v1/80000/E0976CCD-33BE-E611-879D-E41D2D08DFE0.root'
)
then cp the ElectronNtuplerVIDDemo.cc to the plugins directory,
cd $CMSSW_BASE/src
scram b
In order to check that everything is ok, run the demo ntuplizer:
cd EgammaWork/ElectronNtupler/test
cmsRun runElectrons_VID_CutBased_Summer16_80X_demo.py
the output is like following:
Begin processing the 64th record. Run 1, Event 381641, LumiSection 256 at 18-Jan-2021 07:53:45.361 CET
MENG test---->>>ele size---->>> 2ele pt---->>> 83.220009
IdBit:2
Meng test--->>>1019
DEBUG CutFlow, full info for cand with pt=83.220009:
CutFlow name= cutBasedElectronID-Summer16-80X-V1-medium decision is 0
Index cut name isMasked value-cut-upon pass?
0 MinPtCut_0 0 83.220009 1
1 GsfEleSCEtaMultiRangeCut_0 0 0.245101 1
2 GsfEleDEtaInSeedCut_0 0 0.004014 0
3 GsfEleDPhiInCut_0 0 0.011771 1
4 GsfEleFull5x5SigmaIEtaIEtaCut_0 0 0.008891 1
5 GsfEleHadronicOverEMCut_0 0 0.015428 1
6 GsfEleEInverseMinusPInverseCut_0 0 0.017043 1
7 GsfEleEffAreaPFIsoCut_0 0 0.021371 1
8 GsfEleConversionVetoCut_0 0 1.000000 1
9 GsfEleMissingHitsCut_0 0 0.000000 1
DEBUG CutFlow, the result with cut GsfEleFull5x5SigmaIEtaIEtaCut_0 masked out
CutFlow name= cutBasedElectronID-Summer16-80X-V1-medium decision is 0
Index cut name isMasked value-cut-upon pass?
0 MinPtCut_0 0 83.220009 1
1 GsfEleSCEtaMultiRangeCut_0 0 0.245101 1
2 GsfEleDEtaInSeedCut_0 0 0.004014 0
3 GsfEleDPhiInCut_0 0 0.011771 1
4 GsfEleFull5x5SigmaIEtaIEtaCut_0 1 0.008891 1
5 GsfEleHadronicOverEMCut_0 0 0.015428 1
6 GsfEleEInverseMinusPInverseCut_0 0 0.017043 1
7 GsfEleEffAreaPFIsoCut_0 0 0.021371 1
8 GsfEleConversionVetoCut_0 0 1.000000 1
9 GsfEleMissingHitsCut_0 0 0.000000 1
ele size---->>> 2ele pt---->>> 57.086735
IdBit:2
Meng test--->>>1003
DEBUG CutFlow, full info for cand with pt=57.086735:
CutFlow name= cutBasedElectronID-Summer16-80X-V1-medium decision is 0
Index cut name isMasked value-cut-upon pass?
0 MinPtCut_0 0 57.086735 1
1 GsfEleSCEtaMultiRangeCut_0 0 0.735629 1
2 GsfEleDEtaInSeedCut_0 0 0.005562 0
3 GsfEleDPhiInCut_0 0 0.004975 1
4 GsfEleFull5x5SigmaIEtaIEtaCut_0 0 0.010015 0
5 GsfEleHadronicOverEMCut_0 0 0.000000 1
6 GsfEleEInverseMinusPInverseCut_0 0 0.003293 1
7 GsfEleEffAreaPFIsoCut_0 0 0.000000 1
8 GsfEleConversionVetoCut_0 0 1.000000 1
9 GsfEleMissingHitsCut_0 0 0.000000 1
DEBUG CutFlow, the result with cut GsfEleFull5x5SigmaIEtaIEtaCut_0 masked out
CutFlow name= cutBasedElectronID-Summer16-80X-V1-medium decision is 0
Index cut name isMasked value-cut-upon pass?
0 MinPtCut_0 0 57.086735 1
1 GsfEleSCEtaMultiRangeCut_0 0 0.735629 1
2 GsfEleDEtaInSeedCut_0 0 0.005562 0
3 GsfEleDPhiInCut_0 0 0.004975 1
4 GsfEleFull5x5SigmaIEtaIEtaCut_0 1 0.010015 1
5 GsfEleHadronicOverEMCut_0 0 0.000000 1
6 GsfEleEInverseMinusPInverseCut_0 0 0.003293 1
7 GsfEleEffAreaPFIsoCut_0 0 0.000000 1
8 GsfEleConversionVetoCut_0 0 1.000000 1
9 GsfEleMissingHitsCut_0 0 0.000000 1
the illustraion of the output:
ele size---->>> 2 means this event has two electrons
ele pt---->>> 83.220009 means the pt of the first electron
IdBit:2 each electron has one Id bit
CutFlow name= cutBasedElectronID-Summer16-80X-V1-medium means the id in file cutBasedElectronID_Summer16_80X_V1_cff.py which contains several ids in 80X
Meng test--->>>1019 the 1019 means the bits of the ten cutflow, i.e., 1111111011(index 0 is the rightmost bit)
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