Updates Fat jets module for UL Production

[SiewYan]

Tracking progress of jets module upgrade for UL Production

• uses CMSSW_10_6_27 for troubleshooting
• UL-Production branch
• all years affected, focuses 17,18 for now
• FatJet, correction, cleaning, systematics modules
• previously in the VBS semileptonic analysis:

PUPPI AK8, PT > 200 GeV and |η| < 2.4, softdrop mass required to be between 40 GeV and 250 GeV, cut on N-subjettiness variable τ21 < 0.45 is used to identify jets from W or Z decays, V-jets candidates are excluded if their distance from lepton candidates is ∆R < 0.8, Anti-kT R = 0.4 jets within ∆R < 0.8 from the boosted jet candidates are excluded from the event. Corrections: 
Correction to Puppi Softdrop mass for V tagging, shifting at the V boson mass peak as a function of pT and η, has been applied as described in AN-2016/215(Identification and calibration of boosted hadronic W/Z bosons at 13 TeV).

• Sample list for both MC and Data:	Year	MC Production	Data Production
  2016 HIPM	Summer20UL16_106x_nAODv8_HIPM_Full2016v8	Run2016_UL2016_nAODv9_HIPM_Full2016v9
  2016 noHIPM	Summer20UL16_106x_nAODv8_noHIPM_Full2016v8	Run2016_UL2016_nAODv9_noHIPM_Full2016v9
  2017	Summer20UL17_106x_nAODv9_Full2017v9	Run2017_UL2017_nAODv9_Full2017v9
  2018	Summer20UL18_106x_nAODv9_Full2018v9	Run2018_UL2018_nAODv9_Full2018v9

  • JEC for MC in Run2:	Year	Jet-Type	GT	Remark
    2016 APV	CHS and PUPPI (AK4 and AK8)	106X_mcRun2_asymptotic_preVFP_v11
    2016 noAPV	CHS and PUPPI (AK4 and AK8)	106X_mcRun2_asymptotic_v17
    2017	AK4PFCHS, AK4PFPuppi	106X_mc2017_realistic_v8	JEC based on 106X Summer19UL17 (compatible with Summer20UL17)
    2018	CHS and Puppi (AK4 and AK8)	106X_upgrade2018_realistic_v15_L1v1	JEC based on 106X Summer19UL18 (compatible with Summer20UL18)

  • https://twiki.cern.ch/twiki/bin/viewauth/CMS/JECDataMC#Recommended_for_MC

  • https://hypernews.cern.ch/HyperNews/CMS/get/JetMET/2131/1.html

  • JEC for data: https://twiki.cern.ch/twiki/bin/viewauth/CMS/JECDataMC#Recommended_for_Data

  • JR Run2:	Year	SF Data	SF MC	Remarks
    2016 APV
    2016 noAPV
    2017	Summer19UL17_JRV2_DATA	Summer19UL17_JRV2_MC	they are NOT in a Pt-dependent format, the previously strong pt dependency at high eta is however observed to be reduced in UL
    2018	Summer19UL18_JRV2_DATA	Summer19UL18_JRV2_MC	they are NOT in a Pt-dependent format, the previously strong pt dependency at high eta is however observed to be reduced in UL

  • https://twiki.cern.ch/twiki/bin/view/CMS/JetResolution#2016_data

  • PUID (AK4 only): https://twiki.cern.ch/twiki/bin/view/CMS/PileupJetIDUL

  • JetID: https://twiki.cern.ch/twiki/bin/view/CMS/JetID13TeVUL#Recommendations_for_the_13_T_AN1

    Please note: For AK8 jets, the corresponding (CHS or PUPPI) AK4 jet ID should be used.

  • affected modules MC:

  • Steps:

    • MCl1loose2017v9
    • MCl1loose2018v9

  Instance	Remarks
  leptonMaker
  lepSel
  jetSelUL
  CorrFatJetMC	turn off for now, JEC really done centrally
  CleanFatJet

• affected modules data:

  • Steps:
    • DATAl1loose2017v9
    • DATAl1loose2018v9

  Instance	Remarks
  leptonMaker
  lepSel
  jetSelUL
  CorrFatJetData
  CleanFatJet

to-do list:

• [x] troubleshoot Fatjet maker:
  • [x] #4
  • [x] #5
  • [x] #3
  • [x] #8
  • [x] #6
  • [x] #10
• [ ] Add more advanced tagging techniques than W/Z tagging, such as deepAK8 (https://twiki.cern.ch/twiki/bin/view/CMS/DeepAKXTagging) , and respective uncertainties.

Source: google doc

[SiewYan]

prepare PR: #237

[SiewYan]

Closing this PR. Open a new issue for outstanding.

• [ ] Add more advanced tagging techniques than W/Z tagging, such as deepAK8 (https://twiki.cern.ch/twiki/bin/view/CMS/DeepAKXTagging) , and respective uncertainties.