Septemper 2007

Goal ( Training )

  • Adapting myself to SusyAnalyzer quickly
  • Studying PTDR inclusive muons and Supersymmetry
  • Verifying the performance of SusyAnalzer
    • Measuring reconstruction efficiency and purity of both muon and electron
    • Measuring momentum deviation
    • Measuring reconstruction fake rate

Getting Started SusyAnalyzer

PTDR

Measurement of reconstruction efficiency and purity

  • Goal
    • Studying how to measure efficiency and purity, and improve precision of measurement
    • Verifying the MatchObject algorithm in SusyAnalyer

Fixing CMSSW 1_5_2 except SingleMuMinus5to200

Electron

  • Data set : RelVal152Z-EE
  • Event number : 2150
  • Cuts
    • |η| < 2.4
    • Pt >= 10 GeV
  • Expecting lower efficiency ~ 50% than muon's

  • Pt and eta efficiency
    • elec_eff_MC2Reco_2150_halfbin.GIF
  • Pt and eta purity
    • purity2.gif

  • Low precision in high Pt ( > 50 ) region
  • Poor purity

Muon

  • Data sets
    • DrellYan_mumu_40
    • RelVal152Z_MM
    • SingleMuMinus_pt5to200
      • Compatible with CMSSW_1_3_x, incompatible with CMSSW_1_5_x
  • Expecting higher efficiency ~ 95% than electron's
  • Expecting good purity ~ 100%

DrellYan_mumu_40

  • Event number : 24000
  • Cuts
    • |η| < 2.4
    • Pt >= 10 GeV
  • Pt and eta efficiency
    • muon_eff_MC2Reco_24k_halfbin.GIF
  • Pt and eta purity
    • muon_puri_Reco2MC_24k_halfbin.GIF

RelVal152Z_MM

  • Event number : 5100
  • Pt and eta efficiency
    • muon_efficiency(Z-MM).gif
  • Pt and eta purity
    • muon_purity(Z-MM).gif
  • As well as electron's, low precision in high Pt region
  • Two small peaks in efficiency vs pseudorapidity plot

SingleMuMinus_pt5to200

  • Event number : 208000
  • CMSSW_1_3_3, CRAB_1_5_3
  • Using CRAB
  • Pt and eta efficiency
    • Eff_SingleMuMinus.gif
  • Pt and eta purity
    • Puri_SingleMuMinus.gif

  • Momentum deviation distribution
  • Deviation distribution vs Pt
    • MCdPbyPvsPt.gif
  • Deviation distribution vs eta
    • MCdPbyPvsEta.gif

Measurement of reconstruction fake rate

  • Goal
    • Measuring and comfirming reconstruction fake rate
    • Verifying Isolation algorithm in SusyAnalyzer
  • Using QCD event sample : QCD_pt_30_50
  • Electron
    • Total MC truth including Iso and No Iso objects
      • MC_IsoElec_pt.gif MC_NoIsoElec_pt.gif
    • Pt > 10 GeV : Removing soft electrons
      • MC_NoSoftIsoElec_pt.gif MC_NoSoftNoIsoElec_pt.gif
    • |η| < 2.4
      • MC_etaCutIsoElec_pt.gif MC_etaCutNoIsoElec_pt.gif
    • Total RECO objects including Iso and No Iso objects
      • RECO_IsoElec_pt.gif RECO_NoIsoElec_pt.gif
    • Pt > 10 GeV and |η| < 2.4
      • RECO_etaCutIsoElec_Pt.gif RECO_etaCutNoIsoElec_pt.gif
    • Matching RECO objects
      • RECO_MatchIsoElec_pt.gif RECO_MatchNoIsoElec_pt.gif
  • Conclusion
    • The ratio RECO Match Objects / MC Truth = 15 / 24 ~ 62.5% in case of Isolation
    • Therefore ~ 35% RECO electrons are fake
  • Muon
    • Total MC truth including Iso and No Iso objects
      • MC_IsoMuon_pt.gif MC_NoIsoMuon_pt.gif
    • Pt > 10 GeV : Removing soft muons
      • MC_NoSoftIsoMuon_pt.gif MC_NoSoftNoIsoMuon_pt.gif
    • |η| < 2.4
      • MC_etaCutIsoMuon_pt.gif MC_etaCutNoIsoMuon_pt.gif
    • Total RECO objects including Iso and No Iso objects
      • Reco_IsoMuon_pt.gif Reco_NoIsoMuon_pt.gif
    • Pt > 10 GeV and |η| < 2.4
      • Reco_etaCutIsoMuon_pt.gif Reco_etaCutNoIsoMuon_pt.gif
    • Matching RECO objects
      • Reco_MatchIsoMuon_pt.gif Reco_MatchNoIsoMuon_pt.gif
  • Conclusion
    • The ratio RECO Match Objects / MC Truth = 10 / 12 ~ 83% in both case of Isolation and Non-isolation
    • The fake rate of muon reconstruction is quite low

-- SangUnAhn - 26 Oct 2007

Topic attachments
I Attachment History Action Size Date Who Comment
GIFgif Eff_SingleMuMinus.gif r1 manage 12.6 K 2007-10-29 - 10:45 UnknownUser  
GIFgif MC_IsoElec_pt.gif r1 manage 6.5 K 2007-10-29 - 10:46 UnknownUser  
GIFgif MC_IsoMuon_pt.gif r1 manage 6.2 K 2007-10-29 - 11:09 UnknownUser  
GIFgif MC_NoIsoElec_pt.gif r1 manage 6.5 K 2007-10-29 - 10:46 UnknownUser  
GIFgif MC_NoIsoMuon_pt.gif r1 manage 6.4 K 2007-10-29 - 11:09 UnknownUser  
GIFgif MC_NoSoftIsoElec_pt.gif r1 manage 7.1 K 2007-10-29 - 10:47 UnknownUser  
GIFgif MC_NoSoftIsoMuon_pt.gif r1 manage 7.4 K 2007-10-29 - 11:09 UnknownUser  
GIFgif MC_NoSoftNoIsoElec_pt.gif r1 manage 7.2 K 2007-10-29 - 10:47 UnknownUser  
GIFgif MC_NoSoftNoIsoMuon_pt.gif r1 manage 7.5 K 2007-10-29 - 11:10 UnknownUser  
GIFgif MC_etaCutIsoElec_pt.gif r1 manage 7.2 K 2007-10-29 - 11:08 UnknownUser  
GIFgif MC_etaCutIsoMuon_pt.gif r1 manage 7.4 K 2007-10-29 - 11:08 UnknownUser  
GIFgif MC_etaCutNoIsoElec_pt.gif r1 manage 7.2 K 2007-10-29 - 11:09 UnknownUser  
GIFgif MC_etaCutNoIsoMuon_pt.gif r1 manage 7.5 K 2007-10-29 - 11:09 UnknownUser  
GIFgif MCdPbyPvsEta.gif r1 manage 9.9 K 2007-10-29 - 10:47 UnknownUser  
GIFgif MCdPbyPvsPt.gif r1 manage 11.7 K 2007-10-29 - 10:47 UnknownUser  
GIFgif Puri_SingleMuMinus.gif r1 manage 12.6 K 2007-10-29 - 10:50 UnknownUser  
GIFgif RECO_IsoElec_pt.gif r1 manage 7.9 K 2007-10-29 - 11:12 UnknownUser  
GIFgif RECO_MatchIsoElec_pt.gif r1 manage 9.0 K 2007-10-29 - 11:12 UnknownUser  
GIFgif RECO_MatchNoIsoElec_pt.gif r1 manage 8.0 K 2007-10-29 - 11:13 UnknownUser  
GIFgif RECO_NoIsoElec_pt.gif r1 manage 7.6 K 2007-10-29 - 11:13 UnknownUser  
GIFgif RECO_etaCutIsoElec_Pt.gif r1 manage 8.3 K 2007-10-29 - 11:10 UnknownUser  
GIFgif RECO_etaCutNoIsoElec_pt.gif r1 manage 7.7 K 2007-10-29 - 11:15 UnknownUser  
GIFgif Reco_IsoMuon_pt.gif r1 manage 7.0 K 2007-10-29 - 11:16 UnknownUser  
GIFgif Reco_MatchIsoMuon_pt.gif r1 manage 7.2 K 2007-10-29 - 11:13 UnknownUser  
GIFgif Reco_MatchNoIsoMuon_pt.gif r1 manage 7.4 K 2007-10-29 - 11:13 UnknownUser  
GIFgif Reco_NoIsoMuon_pt.gif r1 manage 7.4 K 2007-10-29 - 11:14 UnknownUser  
GIFgif Reco_etaCutIsoMuon_pt.gif r1 manage 7.3 K 2007-10-29 - 11:10 UnknownUser  
GIFgif Reco_etaCutNoIsoMuon_pt.gif r1 manage 7.6 K 2007-10-29 - 11:12 UnknownUser  
GIFgif elec_eff_MC2Reco_2150_halfbin.GIF r1 manage 21.8 K 2007-10-29 - 10:46 UnknownUser  
GIFgif muon_eff_MC2Reco_24k_halfbin.GIF r1 manage 18.1 K 2007-10-29 - 10:49 UnknownUser  
GIFgif muon_efficiency(Z-MM).gif r1 manage 20.9 K 2007-10-29 - 10:49 UnknownUser  
GIFgif muon_puri_Reco2MC_24k_halfbin.GIF r1 manage 24.1 K 2007-10-29 - 10:54 UnknownUser  
GIFgif muon_purity(Z-MM).gif r1 manage 20.3 K 2007-10-29 - 10:49 UnknownUser  
GIFgif purity2.gif r1 manage 13.3 K 2007-10-29 - 10:50 UnknownUser  
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