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ttbar  τ + jets : Update on QCD Estimation

ttbar  τ + jets : Update on QCD Estimation. William Edson SUNY at Albany. Only MET and Dijet Mass Fit Selection. New Results for Fit: Signal Fraction: 0.664442±0.0418289 Chi2: 29.953 Meas. Used: 31 σ : 170.884±10.7578. New Corrected Results: Signal Fraction: 0.686373 ± 0.0418289

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ttbar  τ + jets : Update on QCD Estimation

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  1. ttbarτ + jets:Update on QCD Estimation William Edson SUNY at Albany

  2. Only MET and Dijet Mass Fit Selection • New Results for Fit: • Signal Fraction: 0.664442±0.0418289 • Chi2: 29.953 • Meas. Used: 31 • σ: 170.884±10.7578 • New Corrected Results: • Signal Fraction: 0.686373 ± 0.0418289 • σ: 176.524 ± 10.7578 • Correction Systematic: ±1.97836

  3. QCD Bin/Range Range increases/decreases in steps of 20GeV Bin amount increases/decreases in steps of 5

  4. Slim File List for Additional Systs • mc11_7TeV.105200.T1_McAtNlo_Jimmy.merge.NTUP_TOP.e835_s1272_s1274_r3043_r2993_p937/ • mc11_7TeV.105894.AlpgenJimmyttbarlnqqNp0_baseline.merge.NTUP_TOP.e891_s1372_s1370_r3043_r2993_p937/ • mc11_7TeV.105895.AlpgenJimmyttbarlnqqNp1_baseline.merge.NTUP_TOP.e891_s1372_s1370_r3043_r2993_p937/ • mc11_7TeV.105896.AlpgenJimmyttbarlnqqNp2_baseline.merge.NTUP_TOP.e887_s1372_s1370_r3043_r2993_p937/ • mc11_7TeV.117887.AlpgenJimmyttbarlnqqNp3_baseline.merge.NTUP_TOP.e835_s1372_s1370_r3043_r2993_p937/ • mc11_7TeV.117888.AlpgenJimmyttbarlnqqNp4_baseline.merge.NTUP_TOP.e835_s1372_s1370_r3043_r2993_p937/ • mc11_7TeV.117889.AlpgenJimmyttbarlnqqNp5_baseline.merge.NTUP_TOP.e835_s1372_s1370_r3043_r2993_p937/ • mc11_7TeV.117050.TTbar_PowHeg_Pythia_P2011C.merge.NTUP_TOP.e1377_a131_s1353_a139_r2900_p937/ • mc11_7TeV.105860.TTbar_PowHeg_Jimmy.merge.NTUP_TOP.e1198_a131_s1353_a139_r2900_p937/ • mc11_7TeV.117520.AlpGenPythia_P2011radHi_KTFac05CTEQ5L_ttbarlnqqNp0.merge.NTUP_TOP.e1608_a131_s1353_a145_r2993_p937/ • mc11_7TeV.117521.AlpGenPythia_P2011radHi_KTFac05CTEQ5L_ttbarlnqqNp1.merge.NTUP_TOP.e1608_a131_s1353_a145_r2993_p937/ • mc11_7TeV.117522.AlpGenPythia_P2011radHi_KTFac05CTEQ5L_ttbarlnqqNp2.merge.NTUP_TOP.e1608_a131_s1353_a145_r2993_p937/ • mc11_7TeV.117523.AlpGenPythia_P2011radHi_KTFac05CTEQ5L_ttbarlnqqNp3.merge.NTUP_TOP.e1608_a131_s1353_a145_r2993_p937/ • mc11_7TeV.117524.AlpGenPythia_P2011radHi_KTFac05CTEQ5L_ttbarlnqqNp4INC.merge.NTUP_TOP.e1608_a131_s1353_a145_r2993_p937/ • mc11_7TeV.117530.AlpGenPythia_P2011radLo_KTFac2CTEQ5L_ttbarlnqqNp0.merge.NTUP_TOP.e1608_a131_s1353_a145_r2993_p937/ • mc11_7TeV.117531.AlpGenPythia_P2011radLo_KTFac2CTEQ5L_ttbarlnqqNp1.merge.NTUP_TOP.e1608_a131_s1353_a145_r2993_p937/ • mc11_7TeV.117532.AlpGenPythia_P2011radLo_KTFac2CTEQ5L_ttbarlnqqNp2.merge.NTUP_TOP.e1608_a131_s1353_a145_r2993_p937/ • mc11_7TeV.117533.AlpGenPythia_P2011radLo_KTFac2CTEQ5L_ttbarlnqqNp3.merge.NTUP_TOP.e1608_a131_s1353_a145_r2993_p937/ • mc11_7TeV.117534.AlpGenPythia_P2011radLo_KTFac2CTEQ5L_ttbarlnqqNp4INC.merge.NTUP_TOP.e1608_a131_s1353_a145_r2993_p937/ • mc11_7TeV.117838.TTbar_MT1675_PowHeg_Pythia_P2011C.merge.NTUP_TOP.e1736_s1372_s1370_r3108_r3109_p937/ • mc11_7TeV.117840.TTbar_MT1700_PowHeg_Pythia_P2011C.merge.NTUP_TOP.e1736_s1372_s1370_r3108_r3109_p937/ • mc11_7TeV.117842.TTbar_MT1750_PowHeg_Pythia_P2011C.merge.NTUP_TOP.e1736_s1372_s1370_r3108_r3109_p937/ • mc11_7TeV.117844.TTbar_MT1775_PowHeg_Pythia_P2011C.merge.NTUP_TOP.e1736_s1372_s1370_r3108_r3109_p937/

  5. Back-up

  6. Y(0): -0.186462 ± 0.0013857 Slope: 1.23971 ± 0.00246245 Chi2: 32.7364 NDF: 8998 Linearity Testto All Values

  7. Linearity Testto Means Slope: 1.23772 ± 0.0351884 y-intercept: -0.184483 ± 0.0198016 Chi2: 0.00520053 NDF: 7

  8. Mean Values of Ensemble Fits

  9. Adjust Range for Linear Fit?

  10. MC Tau Plots MC Tau Children Count MC Tau Count MC Tau Children pdgID LeptonicpdgID values: e → 11, μ → 13, τ → 15

  11. MT Signal vs Control vs MC Backgrounds Samples Normalized to Own Integrals Samples Normalized to Sum of Integrals

  12. Fits/Hists for Ensemble Tests

  13. Cutflow • C0: GRL • C1: Trigger • C2: Primary vertex with ntracks > 4 • C3: Electron/muon overlap • 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

  14. Chi-squared minimization • 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

  15. Chi-squared minimization cont. • 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

  16. Highest pTbjet reconstruction • Results for plot: • chi-square: 9.818 • p-value: 0.7753 • ndf: 14 • chi/ndf: 0.7012

  17. 2nd Highest pTbjet reconstruction • Results for plot: • chi-square: 13.66 • p-value: 0.5517 • ndf: 15 • chi/ndf: 0.9107

  18. Dijet Mass reconstruction • Results for plot: • chi-square: 15.47 • p-value: 0.6297 • ndf: 18 • chi/ndf: 0.8594

  19. MET • Results for plot: • chi-square: 15.87 • p-value: 0.1971 • ndf: 12 • chi/ndf: 1.323

  20. Closest pTbjet reconstruction • Results for plot: • chi-square: 14.39 • p-value: 0.2123 • ndf: 11 • chi/ndf: 1.308

  21. New Event Selection Verification (Only uses MC so Excludes QCD)

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