lepton efficiency & fake rate

Yousuke Kataoka

(University of Tokyo)

page 1

11 Sep 2007

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

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

page 3

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

page 4

SU3

Page.5

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

Page.6

75.5±0.3%(pT>20GeV)

85.1±0.3%(pT>20GeV)

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%

Page.7

scale down (～ 40%)50-70GeV23GeV

#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

T1

Page.9

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)

Page.10

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%

Page.11

scale down (～ 40%)50-70GeV26GeV

#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

T1 (large sample)

Page.13

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)

Page.14

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%

Page.15

scale down (～ 40%)50-70GeV25GeV

#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

Atlfast correction

Page.17

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

Page.18

～ 40%

Apply lepton efficiency to Atlfast

Electron（ AtlfastElectronCollection ）

Muon(AtlfastMuonCollection)

Page.19

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

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

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

Page.21