lepton efficiency & fake rate yousuke kataoka university of tokyo content definitions of leptons...

lepton efficiency & fake rate

Yousuke KataokaUniversity of Tokyo

Content• definitions of leptons p2• efficiency and fake rate for SU3 (12.0.6.1) p3, p4• efficiency and fake rate for T1 (12.0.6.4) p5, p6• topology dependence of efficiency p7• topology dependence of fake rate p8• data samples p9

Page.1

Sep 8, 2007

Backup• without isolation condition on Truth• topology dependence of the fake rate

definitions of lepton for comparisonReconstructed LeptonElectron ID• egamma Algorithm (not softe)• isEM mask 0x3ff• Isolation: ET(cone0.2) < 10GeV• |eta|<2.5, pT>20GeV

Muon ID• MuID Algorithm• Combined Muon• Track match chi2 < 20 (&& >0)• Track fit chi2 / DoF < 5• Isolation: ET(cone0.2) < 10GeV• |eta|<2.5, pT>20GeV

※in the calculation of lepton efficiency for the truth lepton (pT>20GeV), the pT threshold of the reconstructed leptons (candidates of the matching) is 15GeV considering to the resolution.

Truth Lepton• definition1:

generator-level lepton come from SUSY, W, Z, tau

• definition2:

leptons of def.1 and generator-level lepton come from others (such as b,c hadrons)

• definition3:

leptons of def.2 and leptons generated by G4

with the condition

• Isolation: ET(cone0.2) < 10GeV

• |eta|<2.5, pT>20GeV

※in the calculation of fake lepton for the reconstructed lepton (pT>20GeV), the pT threshold of the truth leptons (candidates of the matching) is 15GeV considering to the resolution. The isolation cut is not applied on the truth lepton.

Page.2

Truth Jets for the fake study•Tower Clustering with cone 0.4 • |eta|<2.5, pT>20GeV• overlaps to electron are removed with R=0.2

Lepton efficiency for SU3 (12.0.6.1)(trig1_misal1_csc11.005403.SU3_jimmy_susy.recon.AOD.v12000601_tid006978)

truth leptons(definition2) match reconstructed leptons with DR<0.02

Electron pT dep.

Electron eta dep. (pT>30GeV)

Muon eta dep.(pT>30GeV)

Muon pT dep.

75.6±0.5%

76.6±0.5%

85.6±0.4%

85.6±0.5%

※ pT and eta are those of truth leptons

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#event = 49250 (197 files)

#Truth Jet = 228068 (before e removal, 235076)

Reco. Truth (def1) Truth (def2) Truth (def3)

Electron(>20GeV) 6211 7653 7665 7809

Muon(>20GeV) 6767 7711 7730 7730

# rec. candidates

(pT>15GeV)

pT>20GeV

|eta|<2.5

region1

(0～ 0.7)

region2

(0.7～ 1.35)

region3

(1.35～ 1.65)

region4

(1.65～ 2.5)

Electron(def1) 7128 75.6±0.5 82.3±0.6 80.3±0.8 43.8±1.9 61.6±1.6

Electron(def2) 7128 75.6±0.5 82.3±0.6 80.4±0.8 43.8±1.9 61.6±1.6

Muon(def1) 7771 85.6±0.4

Muon(def2) 7771 85.6±0.4

# truth candidates

(pT>15GeV, no isol. cut)

# fake lepton Fake rate tau jet contribution

(truth tau found in 0.4)

Electron(def1) 9246 446 (tau: 227) 2.0×10-3±0.1×10-3 1.0×10-3±0.1×10-3

Electron(def2) 12672 (+b,c) 376 (tau: 222) 1.7×10-3±0.1×10-3 0.9×10-3±0.1×10-3

Electron(def3) 61273 (+pi0γγ) 318 (tau: 189) 1.4×10-3±0.1×10-3 0.8×10-3±0.1×10-3

Muon(def1) 9324 84 (tau: 3) 0.37×10-3±0.04×10-3

Muon(def2) 12220 (+b,c) 4 (tau: 3) 0.02×10-3±0.01×10-3

Muon(def3) 12355 (+decays?) 3 (tau: 2) 0.01×10-3±0.01×10-3

• fake rate (not matched lepton / number of TruthJet)

• efficiency (%)

• numbers of denominatornumbers, efficiency, fake rate for SU3 (12.0.6.1) Page.4

※# truth tau (hadronic decay)7517 (pT>20GeV,|eta|<2.5)

• fake rate from tau hadronic decay is about 3%

Lepton efficiency for T1(trig1_misal1_mc12.005200.T1_McAtNlo_Jimmy.recon.AOD.v12000604_tid007900)

truth leptons(definition2) match reconstructed leptons with DR<0.02

Electron pT dep.

Electron eta dep. (pT>30GeV)

Muon eta dep.(pT>30GeV)

Muon pT dep.

73.3±0.3%

74.0±0.3%

86.0±0.2%

86.0±0.3%

※ pT and eta are those of truth leptons

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#event = 59300 (238 files, file 00120 is 50events)

#Truth Jet = 241362 (before e removal, 259025)

Reco. Truth (def1) Truth (def2) Truth (def3)

Electron(>20GeV) 14646 18548 18622 18833

Muon(>20GeV) 17093 19166 19241 19241

# rec. candidates

(pT>15GeV)

pT>20GeV

|eta|<2.5

region1

(0～ 0.7)

region2

(0.7～ 1.35)

region3

(1.35～ 1.65)

region4

(1.65～ 2.5)

Electron(def1) 16237 73.4±0.3 82.5±0.4 80.3±0.5 42.8±1.1 61.0±0.8

Electron(def2) 16237 73.3±0.3 82.4±0.4 80.3±0.5 42.9±1.1 61.0±0.8

Muon(def1) 18893 86.0±0.2

Muon(def2) 18893 86.0±0.2

# truth candidates

(pT>15GeV, no isol. cut)

# fake lepton Fake rate tau jet contribution

(truth tau found in 0.4)

Electron(def1) 21739 659 (tau: 104) 2.7×10-3±0.1×10-3 0.4×10-3±0.1×10-3

Electron(def2) 26118 (+b,c) 373 (tau: 104) 1.6×10-3±0.1×10-3 0.4×10-3±0.1×10-3

Electron(def3) 40511 (+pi0γγ) 322 (tau: 89) 1.3×10-3±0.1×10-3 0.4×10-3±0.1×10-3

Muon(def1) 21842 398 (tau: 1) 1.7×10-3±0.1×10-3

Muon(def2) 26501 (+b,c) 2 (tau: 0) 0 0 / 241362 jets

Muon(def3) 26552 (+decays?) 2 (tau: 0) 0 0 / 241362 jets

• fake rate (not matched lepton / number of TruthJet)

• efficiency (%)

• numbers of denominatornumbers, efficiency, fake rate for T1 Page.6

※# truth tau (hadronic decay)2320 (pT>20GeV,|eta|<2.5)

unfortunately ΔR or eta of muon is on the threshold !

topology dependence of efficiency

pT>20GeV

|eta|<2.5

region1

(0～ 0.7)

region2

(0.7～ 1.35)

region3

(1.35～ 1.65)

region4

(1.65～ 2.5)

SU3 75.6±0.5 82.3±0.6 80.4±0.8 43.8±1.9 61.6±1.6

T1 73.3±0.3 82.4±0.4 80.3±0.5 42.9±1.1 61.0±0.8

Tt(lνqq)+3j 74.0±0.8 80.7±1.0 77.6±1.2 40.5±2.9 64.9±2.4

Tt(lνqq)+2j 73.8±0.6 82.2±0.8 79.2±1.0 41.7±2.0 59.7±1.8

Tt(lνqq)+1j 73.3±1.0 78.6±1.4 81.9±1.5 46.0±3.4 58.8±2.7

Tt(lνlν)+3j 74.6±0.4 82.3±0.5 79.7±0.7 43.1±1.6 59.7±1.3

W(eν)+5j 67.1±1.2 82.5±1.9 80.5±1.9 35.4±3.3 57.5±2.1

pT>20GeV, |eta|<2.5

SU3 85.6±0.4

T1 86.0±0.2

Tt(lνqq)+3j 85.5±0.6

Tt(lνqq)+2j 86.2±0.5

Tt(lνqq)+1j 85.0±1.0

Tt(lνlν)+3j 84.8±0.4

W(μν)+5j 86.7±0.7

Electron efficiency (definition2 for truth, %)

Muon efficiency (definition2 for truth, %)

the efficiency for each eta region is stable.But inclusive electron efficiency depends on the topology (for example tt or W).This is because the eta distributions differ forthose topologies.

the efficiency for muon is stable

Page.7

topology dependence of fake lepton

pT>20GeV, |eta|<2.5 not from tau jet

SU3 1.7×10-3±0.1×10-3 0.8×10-3±0.1×10-3

T1 1.6×10-3±0.1×10-3 1.1×10-3±0.1×10-3

J1 0.04×10-3±0.04×10-3 0.04×10-3±0.04×10-3

J2 0.4×10-3±0.1×10-3 0.4×10-3±0.1×10-3

J3 0.7×10-3±0.1×10-3 0.7×10-3±0.1×10-3

J4 0.4×10-3±0.1×10-3 0.4×10-3±0.1×10-3

pT>20GeV, |eta|<2.5

SU3 0.02×10-3±0.01×10-3

T1 0 / 240516 jets

J1 0 / 22806 jets

J2 0.02×10-3±0.02×10-3

J3 0 / 124842 jets

J4 0.01×10-3±0.01×10-3

Muon (not matched lepton / number of TruthJet, definition2 for truth but no isolation cut)

Electron (not matched lepton / number of TruthJet, definition2 for truth but no isolation cut)

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～ 10-510-3～ 10-4

data samples

• SU3 (197files) trig1_misal1_csc11.005403.SU3_jimmy_susy.recon.AOD.v12000601_tid006978• T1 (238files) trig1_misal1_mc12.005200.T1_McAtNlo_Jimmy.recon.AOD.v12000604_tid007900

Alpgen samples

• tt(lνqq)+3j trig1_misal1_mc12.005533.AlpgenJimmyToplnqqNp3.recon.AOD.v12000601_tid006531

• tt(lνqq)+2j trig1_misal1_csc11.005532.AlpgenJimmyToplnqqNp2.recon.AOD.v12000601_tid006530

• tt(lνqq)+1j trig1_misal1_csc11.005531.AlpgenJimmyToplnqqNp1.recon.AOD.v12000601_tid006529

• tt(lνlν)+3j trig1_misal1_mc12.005538.AlpgenJimmyToplnlnNp3.recon.AOD.v12000601_tid006535

• W(eν)+5j trig1_misal1_mc12.005226.AlpgenJimmyWenuNp5.recon.AOD.v12000601_tid006527

• W(μν)+5j trig1_misal1_mc12.008205.AlpgenJimmyWmunuNp5.recon.AOD.v12000601_tid006541

Pythia samples

• J1 trig1_misal1_csc11.005010.J1_pythia_jetjet.recon.AOD.v12000601




Page.9

without isolation condition on Truthfor the comparison to other groups

SU3(12.0.6.5) SU3(12.0.6.1) T1(12.0.6.4)

Electron (def-1) 00.0%±0.5% 75.6%±0.5% 73.4%±0.3%

Electron (def-2) 00.0%±0.5% 75.6%±0.5% 73.3%±0.3%

Muon (def-1) 00.0%±0.4% 85.6%±0.4% 86.0%±0.2%

Muon (def-2) 00.0%±0.4% 85.6%±0.4% 86.0%±0.2%

SU3(12.0.6.5) SU3(12.0.6.1) T1(12.0.6.4)

Electron (def-1) 72.1%±0.5% 72.2%±0.5% 70.9%±0.3%

Electron (def-2) 55.5%±0.5% 55.9%±0.5% 63.1%±0.3%

Muon (def-1) 81.8%±0.5% 82.1%±0.4% 83.5%±0.3%

Muon (def-2) 64.4%±0.5% 65.1%±0.5% 74.2%±0.3%

with isolation cut on truth

without isolation cut on truth

page1

Topology dependence of the fake rate

fake electron

matched jet (origin of fake electron)

pT (GeV)

T1fake ratio(matched jets / jet spectrum)

pT (GeV)

T1

J3J1SU3 T1

Topology dependence 1. pT spectrum of jets

Matched jets are higher than fake electronsdue to e/h correction or loose isolation condition ?

pT spectrum of jet highly depends on the topologyWe should use fake rate as a function of pT of jets

pT spectrum of jets

dropped by pT threshold of fake electron (20GeV)

page1

Topology dependence 2. tau jets contribution

SU3 T1 J3

Black plot … all jets contributionRed plot … non tau jets contribution

SU3, T1 samples are tau rich, J samples are not. tau jet contribution makes some difference

tau jet (hadronic decay)contribution

page2

Topology dependence 3. effect of isolation condition

J3

We uses the following isolation condition of reconstructed electron

• ET (cone 0.2) < 10 GeV

• ET (cone 0.2) < 10 GeV && ET (cone 0.2) < 0.1 × ET of electron

But, more strict condition drops the fake rate

J3

page3

• ET (cone 0.2) < 10 GeV

• ET (cone 0.2) < 10 GeV && ET (cone 0.2) < 0.1 × ET of electron

T1 73.3%

T1 70.6%

loose isolation condition

strict isolation condition

• We applied isolation condition on the Truth electron ET (cone 0.2) < 10 GeV

page4

lepton efficiency & fake rate yousuke kataoka university of tokyo content definitions of leptons...

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