lepton efficiency & fake rate
description
Transcript of lepton efficiency & fake rate
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lepton efficiency & fake rate
Yousuke Kataoka
(University of Tokyo)
page 1
11 Sep 2007
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SU3• trig1_misal1_csc11_V1.005403.SU3_jimmy_susy.recon.AOD.v12000601_tid008571 • 399 files (remove overlapped files: ._00004.pool.root.2, ._00013.pool.root.3)• 99700 events (file 00090 has 200 events)
T1• trig1_misal1_mc12.005200.T1_McAtNlo_Jimmy.recon.AOD.v12000604_tid007900
• 238 files• 59300 events (file 00120 has 50 events)
T1 (large sample)• trig1_misal1_mc12.005200.T1_McAtNlo_Jimmy.recon.AOD.v12000604_tid008037
• 2152 files (remove overlapped files: ._01024.pool.root.3, ._01024.pool.root.4)• 537800 events
datasetspage 2
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Reconstructed Lepton• Electron
• egamma Algorithm (not softe)• isEMmask 0x3ff• Isolation: ET(cone0.2) < 10GeV• |eta|<2.5, pT>5GeV
• Muon• MuID Algorithm• Combined Muon (with best match)• Track match chi2 < 20 (&& >0)• Track fit chi2 / DoF< 5• Isolation: ET(cone0.2) < 10GeV• |eta|<2.5, pT>5GeV
definition of efficiency
Truth Lepton• All stable generator-level lepton (e, μ)
• barcode < 100000• reject G4-lepton by barcode
• Isolation: ET(cone0.2) < 10GeV• |eta|<2.5, pT>10GeV
※ Truth-Reconstructed matching is done by dR=0.02
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Reconstructed Lepton• Electron
• egamma Algorithm (not softe)• isEMmask 0x3ff• Isolation: ET(cone0.2) < 10GeV• |eta|<2.5, pT>10GeV
• Muon• MuID Algorithm• Combined Muon (with best match)• Track match chi2 < 20 (&& >0)• Track fit chi2 / DoF< 5• Isolation: ET(cone0.2) < 10GeV• |eta|<2.5, pT>10GeV
definition of fake rate
Truth Lepton• All stable generator-level lepton (e, μ)
• barcode < 100000• reject G4-lepton by barcode
• No isolation cut• |eta|<2.5, pT>5GeV
Truth Jet• |eta|<2.5, no pT cut• dR=0.2 far from Truth Electron (>10GeV)• separete Tau Jet component (tau hadronic jet exists within dR=0.2 or not)
※ Truth-Reconstructed matching is done by dR=0.02 ※ Lepton-Jet matching is done by dR=0.2
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SU3
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Lepton efficiency for SU3 (12.0.6.1,V1)
Electron pT dependence
Electron eta dependence (pT>20GeV)
Muon eta dependence(pT>20GeV)
Muon pT dependence
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75.5±0.3%(pT>20GeV)
85.1±0.3%(pT>20GeV)
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fake electron
matched jet
fake muon
matched jet
pT
pT
events
events fake rate for electron
fake rate for muon
small …(maybe, no need to apply for Atlfast)
fake rate from tau jet
contribution of tau
contribution of others
pT of Jet
pT of Jet
fake rate for SU3~ 2%
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scale down (~ 40%)50-70GeV23GeV
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#event = 99700
#Truth Jet (>20GeV,|eta|<2.5) 462323 (tau: 36980)
Reco. Truth
Electron (>20GeV) 12791 15559
Muon (>20GeV) 13533 15544
# truth
denominator
(pT>10GeV)
# rec. candidates
(pT>5GeV)
pT>10GeV
|eta|<2.5
pT>20GeV
|eta|<2.5
Electron 20620 20786 72.3±0.3 75.5±0.3
Muon 20680 22035 85.0±0.2 85.1±0.2
# rec.
denominator
(pT>10GeV)
# truth
candidates
(pT>5GeV)
# fake lepton # jet match
(dR=0.2)
matched jet
is tau jet
(dR=0.2)
Electron 16916 42287 1606 1404 769
Muon 18197 36985 40 30 13
• fake rate
• efficiency (%)
• basic numbers
numbers, efficiency, fake rate for SU3 Page.8
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T1
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Lepton efficiency for T1 (12.0.6.4)
Electron pT dependence
Electron eta dependence (pT>20GeV)
Muon eta dependence(pT>20GeV)
Muon pT dependence
73.4±0.3%(pT>20GeV)
86.0±0.3%(pT>20GeV)
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fake electron
matched jet
fake muon
matched jet
pT
pT
events
events fake rate for electron
fake rate for muon
small …(maybe, no need to apply for Atlfast)
fake rate from tau jet
contribution of tau
contribution of others
pT of Jet
pT of Jet
fake rate for T1~ 2%
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scale down (~ 40%)50-70GeV26GeV
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#event = 59300
#Truth Jet (>20GeV,|eta|<2.5) 241362 (tau: 9447)
Reco. Truth
Electron (>20GeV) 14646 18622
Muon (>20GeV) 17093 19241
# truth
denominator
(pT>10GeV)
# rec. candidates
(pT>5GeV)
pT>10GeV
|eta|<2.5
pT>20GeV
|eta|<2.5
Electron 22365 20101 71.3±0.3 73.4±0.3
Muon 22997 23592 85.9±0.2 86.0±0.3
# rec.
denominator
(pT>10GeV)
# truth
candidates
(pT>5GeV)
# fake lepton # jet match
(dR=0.2)
matched jet
is tau jet
(dR=0.2)
Electron 17734 38067 815 723 169
Muon 20892 37388 26 19 0
• fake rate
• efficiency (%)
• basic numbers
numbers, efficiency, fake rate for T1 Page.12
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T1 (large sample)
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Lepton efficiency for T1 (large sample)
Electron pT dependence
Electron eta dependence (pT>20GeV)
Muon eta dependence(pT>20GeV)
Muon pT dependence
73.4±0.1%(pT>20GeV)
86.6±0.1%(pT>20GeV)
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fake electron
matched jet
fake muon
matched jet
pT
pT
events
events fake rate for electron
fake rate for muon
small …(maybe, no need to apply for Atlfast)
fake rate from tau jet
contribution of tau
contribution of others
pT of Jet
pT of Jet
fake rate for T1 (large sample)~ 1.5%
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scale down (~ 40%)50-70GeV25GeV
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#event = 537800
#Truth Jet (>20GeV,|eta|<2.5) 2190270 (tau: 84797)
Reco. Truth
Electron (>20GeV) 132255 168680
Muon (>20GeV) 156176 175291
# truth
denominator
(pT>10GeV)
# rec. candidates
(pT>5GeV)
pT>10GeV
|eta|<2.5
pT>20GeV
|eta|<2.5
Electron 202649 181029 71.0±0.1 73.4±0.1
Muon 209940 215764 86.4±0.1 86.6±0.1
# rec.
denominator
(pT>10GeV)
# truth
candidates
(pT>5GeV)
# fake lepton # jet match
(dR=0.2)
matched jet
is tau jet
(dR=0.2)
Electron 159831 345353 7098 6337 1366
Muon 191489 340186 204 156 29
• fake rate
• efficiency (%)
• basic numbers
numbers, efficiency, fake rate for T1 (large) Page.16
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Atlfast correction
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AtlfastParticleJetContainer
AtlfastElectronCollection
AtlfastMuonCollection
AtlfastMissingEtCorrected
AtlfastMissingEt
CorrectedAtlfastMuonCollection
CorrectedAtlfastElectron
Collection
CorrectedAtlfastParticleJet
Container
fake
efficiency
efficiency
fake
scale shift
scale shifttau
non-tau~ O(10-2)
~ O(10-3)
~ 85%
~ 75%
missing
Jet
Electron
Muon
Missing
scale shift
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~ 40%
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Apply lepton efficiency to Atlfast
Electron( AtlfastElectronCollection )
Muon(AtlfastMuonCollection)
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pT dep. eta dep.(pT>20GeV)
pT dep. eta dep.(pT>20GeV)
• extracted from T1 sample (page14)• fairly smooth no parametrization• pT-eta correlation is not considerd
Electron( CorrectedAtlfastElectronCollection )
identified inefficiency
Jet(CorrectedAtlfastParticleJetContainer)
Muon(CorrectedAtlfastMuonCollection)
identified inefficiency
Missing(CorrectedAtlfastMissingEt)
need e/h factor ?set 1 for temporary
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Apply fake rate to AtlfastPage.20
Electron( CorrectedAtlfastElectronCollection )
Jet(CorrectedAtlfastParticleJetContainer)
Missing(CorrectedAtlfastMissingEt)
Jet(AtlfastParticleJetContainer)
tau jet ?
1.5%scaleshift
yesno
fake
fake
• muon fake rate is less than 1/10 of electron fake rate not considered for temporary
page 15scale shift
distributionsevery 10GeV
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software & validation
AtlfastCorrectors… under development
• lxplus: ~kataoka/public/AtlfastCorrectors
• Inputs (AOD container)– AtlfastElectronCollection– AtlfastMuonCollection– AtlfastParticleJetContainer– AtlfastMissingEt
• Outputs (AOD container) … can be inputs of EventView, I think …– CorrectedAtlfastElectronCollection– CorrectedAtlfastMuonCollection– CorrectedAtlfastParticleJetContainer– CorrectedAtlfastMissingEt
• Ver. 00-00-01 … only support constant efficiency and fake rate
• validation … not yet
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