WWZ Run 3 Analysis
Meetings (weekly)
*Thursday, 1:00 pm (CA) / 4:00 pm (FL)
Meetings are held in
Philip's Zoom room
People
Claudio Campagnari (UCSB)
Philip Chang (UF)
Keegan Downham (UCSB)
Matthew Dittrich (UF)
Data and MC Samples
- MC Samples
- Signal MC (2018):
- /WWZ_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL18NanoAODv9-106X_upgrade2018_realistic_v16_L1v1-v1/NANOAODSIM
- /WWZ_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL18NanoAODv9-106X_upgrade2018_realistic_v16_L1v1_ext1-v2/NANOAODSIM
- /WWZJetsTo4L2Nu_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL18NanoAODv9-106X_upgrade2018_realistic_v16_L1v1-v2/NANOAODSIM
- /HZJ_HToWWTo2L2Nu_ZTo2L_M-125_TuneCP5_13TeV-powheg-jhugen727-pythia8/RunIISummer20UL18NanoAODv9-106X_upgrade2018_realistic_v16_L1v1-v2/NANOAODSIM
- /GluGluZH_HToWWTo2L2Nu_M-125_TuneCP5_13TeV-powheg-pythia8/RunIISummer20UL18NanoAODv9-106X_upgrade2018_realistic_v16_L1v1-v2/NANOAODSIM
- /VHToNonbb_M125_TuneCP5_13TeV-amcatnloFXFX_madspin_pythia8/RunIISummer20UL18NanoAODv9-106X_upgrade2018_realistic_v16_L1v1-v2/NANOAODSIM
- Signal MC (2017):
- /WWZ_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL17NanoAODv9-106X_mc2017_realistic_v9-v1/NANOAODSIM
- /WWZ_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL17NanoAODv9-106X_mc2017_realistic_v9_ext1-v2/NANOAODSIM
- /WWZJetsTo4L2Nu_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL17NanoAODv9-106X_mc2017_realistic_v9-v2/NANOAODSIM
- /HZJ_HToWWTo2L2Nu_ZTo2L_M-125_TuneCP5_13TeV-powheg-jhugen727-pythia8/RunIISummer20UL17NanoAODv9-106X_mc2017_realistic_v9-v2/NANOAODSIM
- /GluGluZH_HToWWTo2L2Nu_M-125_TuneCP5_13TeV-powheg-pythia8/RunIISummer20UL17NanoAODv9-106X_mc2017_realistic_v9-v2/NANOAODSIM
- /VHToNonbb_M125_TuneCP5_13TeV-amcatnloFXFX_madspin_pythia8/RunIISummer20UL17NanoAODv9-106X_mc2017_realistic_v9-v2/NANOAODSIM
- Signal MC (2016):
- /WWZ_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL16NanoAODv9-106X_mcRun2_asymptotic_v17-v1/NANOAODSIM
- /WWZ_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL16NanoAODv9-106X_mcRun2_asymptotic_v17_ext1-v1/NANOAODSIM
- /WWZ_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL16NanoAODAPVv9-106X_mcRun2_asymptotic_preVFP_v11-v1/NANOAODSIM
- /WWZ_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL16NanoAODAPVv9-106X_mcRun2_asymptotic_preVFP_v11_ext1-v1/NANOAODSIM
- /WWZJetsTo4L2Nu_4F_TuneCP5_13TeV-amcatnlo-pythia8/RunIISummer20UL16NanoAODv9-106X_mcRun2_asymptotic_v17-v2/NANOAODSIM
- /HZJ_HToWWTo2L2Nu_ZTo2L_M-125_TuneCP5_13TeV-powheg-jhugen727-pythia8/RunIISummer20UL16NanoAODv9-106X_mcRun2_asymptotic_v17-v2/NANOAODSIM
- /GluGluZH_HToWWTo2L2Nu_M-125_TuneCP5_13TeV-powheg-pythia8/RunIISummer20UL16NanoAODv9-106X_mcRun2_asymptotic_v17-v2/NANOAODSIM
- /GluGluZH_HToWWTo2L2Nu_M125_13TeV_powheg_pythia8_TuneCP5_PSweights/RunIISummer20UL16NanoAODv9-106X_mcRun2_asymptotic_v17-v2/NANOAODSIM
- /VHToNonbb_M125_TuneCP5_13TeV-amcatnloFXFX_madspin_pythia8/RunIISummer20UL16NanoAODv9-106X_mcRun2_asymptotic_v17-v2/NANOAODSIM
- ZZ Background MC (2018):
- /ZZTo4L_TuneCP5_13TeV_powheg_pythia8/RunIISummer20UL18NanoAODv9-106X_upgrade2018_realistic_v16_L1v1-v2/NANOAODSIM
- /ZZTo4L_TuneCP5_13TeV_powheg_pythia8/RunIISummer20UL18NanoAODv9-20UL18JMENano_106X_upgrade2018_realistic_v16_L1v1-v1/NANOAODSIM
- ZZ Background MC (2017):
- /ZZTo4L_TuneCP5_13TeV_powheg_pythia8/RunIISummer20UL17NanoAODv9-106X_mc2017_realistic_v9-v2/NANOAODSIM
- /ZZTo4L_TuneCP5_13TeV_powheg_pythia8/RunIISummer20UL17NanoAODv9-20UL17JMENano_106X_mc2017_realistic_v9-v1/NANOAODSIM
- ZZ Background MC (2016):
- /ZZTo4L_TuneCP5_13TeV_powheg_pythia8/RunIISummer20UL16NanoAODv9-106X_mcRun2_asymptotic_v17-v1/NANOAODSIM
- /ZZTo4L_TuneCP5_13TeV_powheg_pythia8/RunIISummer20UL16NanoAODv9-20UL16JMENano_106X_mcRun2_asymptotic_v17-v1/NANOAODSIM
The full list of samples can be found
here.
Skimming
There will be 2 sets of skims for 2016-2018 data/MC: an inclusive 4-lepton skim and a 3-lepton skim. For a first skim, the selected leptons will satisfy the following criteria
- Muons
- looseId = 1
- |η| < 2.4
- pT > 10 GeV
- pfIsoId >= 1
- Electrons
- mvaFall17V2noIso_WPL = 1
- |η| < 2.5
- pT > 10 GeV
- pfRelIso03_all > 0.4
Pre-Selection
This analysis targets the 4-lepton final state. The pre-selection criteria is as follows:
- Preselection: exactly 4 leptons satisfying the Common veto ID (see section "Skimming" for the definition)
- Lepton IDs: Leptons are categorized as a Z-candidate or a W-candidate. The criteria for electron and muon IDs for W and Z candidates are
- Electrons
- Z candidate (ZID)
- ID: MVA POG Loose NoIso
- |IP3D/σIP3D| < 4
- Irel,R=0.3,EA,Lep < 0.2
- W candidate (WID)
- ID: MVA 90% Iso
- |IP3D/σIP3D| < 4
- Irel,R=0.3,EA,Lep < 0.2
- Muons
- Z candidate (ZID)
- ID: Medium
- |IP3D/σIP3D| < 4
- Irel,R=0.4,Δβ < 0.25
- W candidate (WID)
- ID: Medium
- |IP3D/σIP3D| < 4
- Irel,R=0.4,Δβ < 0.15
- Z Candidate Selection: The pair of leptons passing the ZID requirement with same flavor, opposite charge, that have an invariant mass closest to the Z boson mass. Both leptons are also subject to the following pT and mll requirements:
- leading Z candidate lepton: pT > 25 GeV
- subleading Z candidate lepton: pT > 15 GeV
- |mll - mZ| < 10 GeV
- W Candidate Selection: The remaining two leptons (the non-Z candidates) passing the WID requirements are then chosen as the W lepton candidates. We require the W lepton candidates to have opposite charge. Both leptons are subject to the following pT requirements:
- leading W candidate lepton: pT > 25 GeV
- subleading W candidate lepton: pT > 15 GeV
- QCD low mass resonance veto: Any opposite charge pair of leptons must have an invariant mass > 12 GeV
- b-tagged jet veto: selected events must have no b-tagged jets
Event Categorization
Events passing the pre-selection are categorized according to the flavors of the W candidate leptons. Two categories are defined: the opposite flavor category (eμ) and the same flavor category (ee/μμ). Below is a brief description of the dominant backgrounds in each category and the selections made to address said backgrounds:
- eμ: The main backgrounds in this category are ZZ--> ττ --> eμ (for mll < 100 GeV ) and ttZ (for mll > 100 GeV ). The ZZ background is reduced heavily by cutting on the mT2 variable, while the ttZ background is largely unaffected by cutting on mT2 due to the similar kinematics as the signal. Because of this, events with mll < 100 GeV are required to have mT2 > 25 GeV , while events with mll > 100 GeV are not subject to any cut on mT2.
- ee/μμ: The main background in this category is ZZ--> 4l. No additional selection is applied to this category prior to binning (see sec. "Binning").