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)

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

Cutflows group by group

Cutflow by TATA:

Cutflow by IPM:

Cutflow by KIT:

Cutflow by Louvain:

Cutflow by Louvain: Hide

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.