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ttbar τ + jets : Update on QCD Estimation

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ttbarτ + jets:Update on QCD Estimation

William Edson

SUNY at Albany

- Results for Fit:
- Signal Fraction: 0.666737±0.038823
- Chi2: 65.723
- Meas. Used: 69
- σ: 164.427±9.574

- Ensemble Results:
- Mean: 0.608899±0.00123928
- chi2: 4.49706
- NDF: 8

Input Fraction 0.639599

- Results for Fit:
- Signal Fraction: 0.639599±0.0435993
- Chi2: 28.0518
- Meas. Used: 32
- σ: 157.735±10.7522

- Ensemble Results:
- Mean: 0.610350±0.00123522
- chi2: 5.81292
- NDF: 7

- Results for Fit:
- Signal Fraction: 0.627044±0.0438223
- Chi2: 29.579
- Meas. Used: 32
- σ: 154.638±10.8072

- Ensemble Results:
- Mean: 0.594567±0.00124826
- chi2: 10.4607
- NDF: 9

- Results for Fit:
- Signal Fraction: 0.634902±0.0427204
- Chi2: 34.5105
- Meas. Used: 31
- σ: 156.576±10.5355

- Ensemble Results:
- Mean: ?
- chi2: ?

- Results for Fit:
- Signal Fraction: 0.65095±0.0415496
- Chi2: 44.576
- Meas. Used: 51
- σ: 160.534±10.2467

- Ensemble Results:
- Mean: 0.609824±0.00122732
- chi2: 4.50061
- NDF: 7

Input Fraction 0.627044

- Results for Fit:
- Signal Fraction: 0.646003±0.0407967
- Chi2: 51.0783
- Meas. Used: 50
- σ: 159.314±10.0611

- Ensemble Results:
- Mean: 0.571676±0.00122598
- chi2: 6.46039
- NDF: 8

MET

Dijet Mass

Highest pTbjet Reconstruction

2nd Highest pTbjet Reconstruction

The other background histograms titled incorrectly due to error in the analysis code, has been corrected.

- C0: GRL
- C1: Trigger
- C2: Primary vertex with ntracks > 4
- C3: Electron/muon overlap, larVeto
- C4: Jet cleaning
- C5: Lepton Veto
- C6: tau n ≥ 1
- C7: njets >= 4 with eta < 2.5 and |jvf| > 0.75
- C8: MET > 60GeV
- C9: MT < 80GeV
- C10: >= 1 bjet
- C11: Trigger matched tau n ≥ 1 and pT >= 40GeV
- C12: MC tau object match

- Equation:
- N(x): total number of events of type x for distribution
- n(x)i: number of events in bin of type x
- frac(Sig): fraction of N(Remain) expected to be Signal
- binfrac(x)i: fraction of events in bin of type x expected from MC or template
- σi: uncertainty in bin i

- σi determined using factors for:
- bin error:
- data
- signal, MC
- QCD template
- other backgrounds, MC

- statistical error:
- data: signal region
- other backgrounds, MC
- signal, MC
- QCD template (uncertainty of background region data and all MC background region carried through via default SumW2

- bin error:

- Results for plot:
- chi-square: 18.798
- p-value: 0.4044
- ndf: 18
- chi/ndf: 1.044

- Results for plot:
- chi-square: 20.82
- p-value: 0.2346
- ndf: 17
- chi/ndf: 1.225

- Results for plot:
- chi-square: 12.06
- p-value: 0.8829
- ndf: 19
- chi/ndf: 0.6347

- Results for plot:
- chi-square: 8.373
- p-value: 0.93697
- ndf: 16
- chi/ndf: 0.5233

y(0): 0.0121648±0.00477388slope: 0.927763±0.00910238

chi2: 7.63631NDF: 7

y(0): 0.00762894±0.00158121slope: 0.935856±0.00280988

chi2: 42.6259NDF: 8998

Mean: 171.283 ± 5.986

- Efficiency: Limiting to events in 105200 sample satisfying:
- contain truth matched taus
- single prong
- muonVeto and eleBDTMedium == 0
- calo-seeded taus

- Acceptance: Using all MC types
- Nrec: MC events passing entire cutflow
- Ngen: 105200 events using mc and trueTau branch information matched to single prong, BDTJetScore > 0.7 taus