Single-top Run II 25ns analysis synchronization exercise (TOP-15-004)


Samples and files (RunIISpring15MiniAODv2):

Samples are listed here (UCL) and here (IPM, KIT, TATA).

Use this file for the first checks (Number of Initial Events 49300):

/store/mc/RunIISpring15MiniAODv2/ST_t-channel_4f_leptonDecays_13TeV-amcatnlo-pythia8_TuneCUETP8M1/MINIAODSIM/74X_mcRun2_asymptotic_v2-v1/10000/2243C14F-C271-E511-8855-00266CFFBC64.root

You may want to copy this file:

xrdcp root://xrootd.ba.infn.it//store/mc/RunIISpring15MiniAODv2/ST_t-channel_4f_leptonDecays_13TeV-amcatnlo-pythia8_TuneCUETP8M1/MINIAODSIM/74X_mcRun2_asymptotic_v2-v1/10000/2243C14F-C271-E511-8855-00266CFFBC64.root myLocalDir

Attention: Please provide the number of events separetely for positive and negative weights. Note that this was simply the reason why a sample from aMC@NLO has been selected for the synchronization exercise.

Baseline selection (Spring15)

Step Selection Extended list of cuts
0 trigger HLT_IsoMu20_v1
1 PV quality & Filters ndof > 4, abs(z)< 24cm, R< 2cm, PV quality HBHENoiseFilter METFilter
2 exactly one isol. muon exactly one muon, pt > 22, abs(eta)< 2.1, Deltabeta_Iso< 0.06 and TIGHT category id cuts
3 loose muon veto Reject events with any other loose muon, pt > 10, abs(eta)< 2.5, Deltabeta_Iso< 0.2 and LOOSE category id cuts
4 electron veto Reject events with any loose electron, et > 20, abs(eta)< 2.5 and VETO category id cuts
5 =2 jets ak4PFJetsCHS, pt > 40, abs(eta)< 4.7 and LOOSE category id cuts
6 b-tagging 1 CSV2T tag amongst the two jets, CSVv2T >0.97 See WP also here
7 mT cut on mT > 50

POG object links:

Muon ID: https://twiki.cern.ch/twiki/bin/view/CMS/SWGuideMuonIdRun2

Electron ID: https://twiki.cern.ch/twiki/bin/viewauth/CMS/CutBasedElectronIdentificationRun2

Jet ID: https://twiki.cern.ch/twiki/bin/viewauth/CMS/JetID#Recommendations_for_13_TeV_data

CSVV2 working point: https://twiki.cern.ch/twiki/bin/viewauth/CMS/BtagRecommendation74X

MET: https://twiki.cern.ch/twiki/bin/view/CMS/TopJME#MET

Note: analyses should use whatever they see better for QCD rejection, in this case the MET cut is here only to synchronize coarsely on the definition of the basic ingredient.

Cutflow all groups

Group Processed events Step 0 Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Remarks
Louvain 49300 10612 10612 7389 7367 7357 2535 947   See 'Extra info' column

Cutflows group by group

Cutflow by TATA:

Cutflow by IPM:

Cutflow by KIT:

Cutflow by Louvain:


Number of Initial Events: 49300 (Positive:29995 (0.608), Negative:19305)

Step Events Positive Extra info
0 (trigger) 10612 6462 (0.608) -
1 (PV quality & Filters ) 10612 6462 (0.608) -
2 (1 iso muon) 7389 4523 (0.612) Isolation parameters: β = 0.5, ΔR = 0.4, muons excluded from isolation deposits
3 (0 loose muons) 7367 4512 (0.612) Isolation parameters: β = 0.5, ΔR = 0.4, muons excluded from isolation deposits
4 (0 loose electrons) 7357 4505 (0.612) cutBasedElectronID-Spring15-25ns-V1-standalone-veto & !(1.4442<eta<1.5660) & passConversionVeto
5 (=2 jets) 2535 1537 (0.606)

ΔR(jet, tight muon)>0.3

6 (=1 b-tagged) 947 583 (0.615) abs(eta)<2.4 & pfcombinedInclusiveSecondaryVertexV2BJetTags>0.97
7 mT -   Not currently applied
Comments:

i) No HBHENoiseFilter and METFilter are applied yet

ii) The VID package has been used for electron ID

iii) JEC Corrections: Summer15_25nsV6 (not propagated yet to MET)

iv) The numbers inside parentheses are the fraction of events per selection step with positive weights.

-- MatthiasKomm - 2015-11-23
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Topic revision: r5 - 2015-11-25 - GeorgiosKrintiras
 
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