Muon Identification Efficiencies Using Tag &Probe

Tag & Probe Configuration

TAG A Tag muon is required to pass the tight muon selection ie:

  • pT>20 GeV
  • |eta|<2.1
  • Identified as both tracker and standalone muon
  • Track muon selection ie pixel hits>0 & hits in the tracker>10
  • Muon matches to atleast 2 muon stations
  • D0<2 mm & Chi2/ndof<10
  • Hits in the muon chamber used in the global muon fit>0
  • Relative Combined isolation<0.15
  • It should match to the trigger object

PROBE

  • pT>5 GeV & |eta|<2.1

TAG PROBE PAIR

  • Tag muon + probe muon with opposite charge
  • Invariant mass of tag&probe pair lies between 60-120 GeV

FITTING METHOD

  • Used fitting procedure from Tag&Probe official package ie SimplifiedElectronTagAndProbe.C
  • Signal : Convolution of Breit-Wigner with Crystall Ball
  • Background : Exponential

Datasets Used

  • DATA /Mu/Run2010B-PromptReco-v2/RECO (32.29 pb-1)

/Mu/Run2010A-Sep17ReReco_v2/RECO (3.00pb-1)

  • MC DYT0MuMu_M-20_CT10_TuneZ2_7TeV-powheg- pythia/Fall10- START38_V12-v1/GEN-SIM-RECO

Efficiencies

A Probe muon is used to calculate 6 efficiencies:

  1. StandAlone Muon(STA) : A probe muon is required to pass all the cuts involving the inner tracker.
  2. Tracker Muon(TRK) : A probe muon must be reconstructed as a good quality standalone muon.
  3. Muon ID : A probe muon must pass all the cuts except for the cuts on D0 and Chi2.
  4. Muon ISO : A probe muon must pass all the cuts except for the isolation cut.
  5. Muon Trigger : A probe muon must pass all the cuts except for the HLT.

An overview of used probes and passing probes are shown in table :

Factorized efficiency Probe object Passing crieteria for probe
STA Tracker Muon StandAlone Muon
TRK StandAlone Muon Tracker Muon
ID Tracker & StandAlone Muon Chi2 & D0 cut
ISO Muon ID Isolated Muon
TRG Isolated Muon Passing the trigger

Resulting Plots

Efficiency plots as a function of pt and eta , Scale factor as a function of pt are shown below

  • StandAlone Muon
Standalone.gif Standalone_eta.gif DataMCStandAlone.gif

  • Tracker Muon
Tracker.gif Tracker_eta.gif DataMCTracker.gif

  • Muon ID
ID.gif ID_eta.gif DataMCID.gif

  • Muon Iso
Iso.gif Iso_eta.gif DataMCIso.gif

  • HLT_Mu9
HLT_Mu9.gif HLT_Mu9_eta.gif DataMCHLT_Mu9.gif

  • HLT_Mu11
HLT_Mu11.gif HLT_MU11_eta.gif DataMCHLT_Mu11.gif

  • HLT_Mu15_v1
HLT_Mu15_v1.gif HLT_Mu15_v1_eta.gif DataMCHLT_Mu15_v1.gif

  • Summary Table for efficiency
Factorized Efficiency Data(%) Simulation Scale Factor
STA 98.09 +/- 0.55 99.51 0.985 +/- 0.005
TRK 98.23 +/- 0.19 98.26 0.999 +/- 0.002
ID 97.59 +/- 0.43 99.64 0.979 +/- 0.004
ISO 98.16 +/- 0.08 98.26 0.998 +/- 0.000
HLT_Mu9 91.99 +/- 1.52 96.36 0.954 +/- 0.015
HLT_Mu11 94.17 +/- 0.31 0.977 +/- 0.003
HLT_Mu15_v1 94.27 +/- 0.24 0.978 +/- 0.002

Topic attachments
I Attachment History Action Size Date Who Comment
GIFgif DataMCHLT_Mu11.gif r1 manage 6.0 K 2011-01-13 - 14:39 BhawnaGomber  
GIFgif DataMCHLT_Mu15_v1.gif r1 manage 5.9 K 2011-01-13 - 14:40 BhawnaGomber  
GIFgif DataMCHLT_Mu9.gif r1 manage 6.0 K 2011-01-13 - 15:59 BhawnaGomber  
GIFgif DataMCID.gif r1 manage 5.9 K 2011-01-13 - 14:29 BhawnaGomber  
GIFgif DataMCIso.gif r1 manage 6.0 K 2011-01-13 - 14:31 BhawnaGomber  
GIFgif DataMCStandAlone.gif r1 manage 5.8 K 2011-01-13 - 14:25 BhawnaGomber  
GIFgif DataMCTracker.gif r1 manage 5.8 K 2011-01-13 - 14:28 BhawnaGomber  
GIFgif HLTMu11.gif r1 manage 7.8 K 2010-12-06 - 16:29 BhawnaGomber  
GIFgif HLTMu11_eta.gif r1 manage 7.1 K 2010-12-06 - 16:29 BhawnaGomber  
GIFgif HLTMu11_rat.gif r1 manage 7.2 K 2010-12-06 - 16:29 BhawnaGomber  
GIFgif HLTMu15v1.gif r2 r1 manage 7.8 K 2010-12-06 - 16:30 BhawnaGomber  
GIFgif HLTMu15v1_eta.gif r1 manage 7.2 K 2010-12-06 - 16:30 BhawnaGomber  
GIFgif HLTMu15v1_rat.gif r1 manage 7.3 K 2010-12-06 - 16:31 BhawnaGomber  
GIFgif HLTMu9.gif r2 r1 manage 8.4 K 2010-12-06 - 16:27 BhawnaGomber  
GIFgif HLTMu9_eta.gif r1 manage 7.2 K 2010-12-06 - 16:27 BhawnaGomber  
GIFgif HLTMu9_rat.gif r1 manage 8.0 K 2010-12-06 - 16:28 BhawnaGomber  
GIFgif HLT_MU11_eta.gif r1 manage 6.4 K 2011-01-13 - 14:39 BhawnaGomber  
GIFgif HLT_Mu11.gif r1 manage 6.8 K 2011-01-13 - 14:37 BhawnaGomber  
GIFgif HLT_Mu15_v1.gif r1 manage 6.9 K 2011-01-13 - 14:40 BhawnaGomber  
GIFgif HLT_Mu15_v1_eta.gif r1 manage 6.5 K 2011-01-13 - 14:40 BhawnaGomber  
GIFgif HLT_Mu9.gif r1 manage 6.8 K 2011-01-13 - 14:31 BhawnaGomber  
GIFgif HLT_Mu9_eta.gif r1 manage 6.5 K 2011-01-13 - 14:36 BhawnaGomber  
GIFgif ID.gif r1 manage 6.6 K 2011-01-13 - 15:59 BhawnaGomber  
GIFgif ID_eta.gif r1 manage 6.7 K 2011-01-13 - 14:29 BhawnaGomber  
GIFgif Iso.gif r1 manage 6.6 K 2011-01-13 - 14:30 BhawnaGomber  
GIFgif Iso_eta.gif r1 manage 7.0 K 2011-01-13 - 14:30 BhawnaGomber  
GIFgif Standalone.gif r1 manage 6.9 K 2011-01-13 - 14:22 BhawnaGomber  
GIFgif Standalone_eta.gif r1 manage 7.2 K 2011-01-13 - 14:25 BhawnaGomber  
GIFgif Tracker.gif r1 manage 6.7 K 2011-01-13 - 14:28 BhawnaGomber  
GIFgif Tracker_eta.gif r1 manage 7.1 K 2011-01-13 - 14:26 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu11Fail3.gif r1 manage 11.2 K 2010-12-09 - 20:08 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu11Fail4.gif r1 manage 11.5 K 2010-12-09 - 20:07 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu11Pass3.gif r1 manage 10.9 K 2010-12-09 - 20:08 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu11Pass4.gif r1 manage 11.6 K 2010-12-09 - 20:07 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu15_v1Fail3.gif r1 manage 10.9 K 2010-12-09 - 20:09 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu15_v1Fail4.gif r1 manage 11.0 K 2010-12-09 - 20:08 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu15_v1Pass3.gif r1 manage 10.9 K 2010-12-09 - 20:09 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu15_v1Pass4.gif r1 manage 11.1 K 2010-12-09 - 20:08 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu9Fail3.gif r1 manage 11.0 K 2010-12-09 - 20:07 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu9Fail4.gif r1 manage 12.0 K 2010-12-09 - 20:06 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu9Pass3.gif r1 manage 11.2 K 2010-12-09 - 20:06 BhawnaGomber  
GIFgif fit_ZmassglbMuPassingHLT_Mu9Pass4.gif r1 manage 11.3 K 2010-12-09 - 20:06 BhawnaGomber  
GIFgif fit_ZmasspassingGlobalFail3.gif r1 manage 11.8 K 2010-12-09 - 19:59 BhawnaGomber  
GIFgif fit_ZmasspassingGlobalFail4.gif r1 manage 11.4 K 2010-12-09 - 19:59 BhawnaGomber  
GIFgif fit_ZmasspassingGlobalPass3.gif r1 manage 10.9 K 2010-12-09 - 19:59 BhawnaGomber  
GIFgif fit_ZmasspassingGlobalPass4.gif r1 manage 11.0 K 2010-12-09 - 19:58 BhawnaGomber  
GIFgif fit_ZmasspassingIDFail3.gif r1 manage 11.5 K 2010-12-09 - 20:04 BhawnaGomber  
GIFgif fit_ZmasspassingIDFail4.gif r1 manage 10.7 K 2010-12-09 - 20:03 BhawnaGomber  
GIFgif fit_ZmasspassingIDPass3.gif r1 manage 10.9 K 2010-12-09 - 20:04 BhawnaGomber  
GIFgif fit_ZmasspassingIDPass4.gif r1 manage 10.9 K 2010-12-09 - 20:03 BhawnaGomber  
GIFgif fit_ZmasspassingIsoFail3.gif r1 manage 12.1 K 2010-12-09 - 20:05 BhawnaGomber  
GIFgif fit_ZmasspassingIsoFail4.gif r1 manage 12.2 K 2010-12-09 - 20:05 BhawnaGomber  
GIFgif fit_ZmasspassingIsoPass3.gif r1 manage 10.8 K 2010-12-09 - 20:05 BhawnaGomber  
GIFgif fit_ZmasspassingIsoPass4.gif r1 manage 10.9 K 2010-12-09 - 20:04 BhawnaGomber  
GIFgif fit_ZmasspassingStandAloneFail3.gif r1 manage 12.0 K 2010-12-09 - 20:01 BhawnaGomber  
GIFgif fit_ZmasspassingStandAloneFail4.gif r1 manage 11.0 K 2010-12-09 - 20:00 BhawnaGomber  
GIFgif fit_ZmasspassingStandAlonePass3.gif r1 manage 11.0 K 2010-12-09 - 20:01 BhawnaGomber  
GIFgif fit_ZmasspassingStandAlonePass4.gif r1 manage 11.0 K 2010-12-09 - 20:00 BhawnaGomber  
GIFgif fit_ZmasspassingTrackerFail3.gif r1 manage 11.6 K 2010-12-09 - 20:03 BhawnaGomber  
GIFgif fit_ZmasspassingTrackerFail4.gif r1 manage 10.9 K 2010-12-09 - 20:02 BhawnaGomber  
GIFgif fit_ZmasspassingTrackerPass3.gif r1 manage 10.9 K 2010-12-09 - 20:02 BhawnaGomber  
GIFgif fit_ZmasspassingTrackerPass4.gif r1 manage 11.0 K 2010-12-09 - 20:02 BhawnaGomber  
GIFgif passingGlobal.gif r7 r6 r5 r4 r3 manage 7.5 K 2010-12-06 - 16:08 BhawnaGomber  
PDFpdf passingGlobal.pdf r1 manage 14.5 K 2010-12-06 - 16:04 BhawnaGomber  
GIFgif passingGlobal_eta.gif r1 manage 6.9 K 2010-12-06 - 16:09 BhawnaGomber  
GIFgif passingGlobal_rat.gif r1 manage 6.9 K 2010-12-06 - 16:11 BhawnaGomber  
GIFgif passingID.gif r1 manage 6.7 K 2010-12-06 - 16:21 BhawnaGomber  
GIFgif passingID_Eta.gif r1 manage 6.7 K 2010-12-06 - 16:21 BhawnaGomber  
GIFgif passingID_rat.gif r1 manage 6.2 K 2010-12-06 - 16:22 BhawnaGomber  
GIFgif passingIso.gif r1 manage 7.3 K 2010-12-06 - 16:22 BhawnaGomber  
GIFgif passingIso_eta.gif r1 manage 6.9 K 2010-12-06 - 16:22 BhawnaGomber  
GIFgif passingIso_rat.gif r1 manage 6.7 K 2010-12-06 - 16:22 BhawnaGomber  
GIFgif passingStandAlone.gif r1 manage 7.1 K 2010-12-06 - 16:13 BhawnaGomber  
GIFgif passingStandAlone_eta.gif r1 manage 7.2 K 2010-12-06 - 16:14 BhawnaGomber  
GIFgif passingStandAlone_rat.gif r1 manage 6.6 K 2010-12-06 - 16:14 BhawnaGomber  
GIFgif passingTracker.gif r1 manage 8.7 K 2010-12-06 - 16:18 BhawnaGomber  
GIFgif passingTracker_eta.gif r1 manage 7.1 K 2010-12-06 - 16:19 BhawnaGomber  
GIFgif passingTracker_rat.gif r1 manage 8.1 K 2010-12-06 - 16:19 BhawnaGomber  
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Topic revision: r7 - 2011-11-25 - BhawnaGomber
 
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