ttbar τ + jets : Update on QCD Estimation

ttbar τ + jets:Update on QCD Estimation

William EdsonSUNY 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 σ: 176.524 ± 10.7578 Correction Systematic:

±1.97836

Sample Fraction Cor. Fraction

σ Unc (absolute)

Unc (%)

Nominal0.664442 0.685203904 176.2233944

- -JER

0.665639 0.686278642 177.0805214 0.857127064 0.48638665JRE

0.665257 0.685935659 176.9995242 0.776129838 0.440423839JES up

0.635769 0.659459578 157.136386 19.0870084 10.83114332JES down

Error determined during running caused by missing input ntuple sampleJVF up

0.663283 0.684163285 175.0608676 1.162526811 0.659689263JVF down

0.66522 0.685902439 177.2338911 -1.01049674 -0.573418043BSF up

0.660732 0.681872845 171.6705412 4.552853193 2.583569117BSF down

0.668005 0.688402977 181.0230963 -4.79970194 -2.723646289MET up

0.655391 0.677077378 171.3473195 4.876074841 2.766984973MET down

0.680586 0.699698948 182.4723177 -6.24892331 -3.546023692Tau trig up

0.687623 0.706017185 180.283724 -4.06032962 -2.304080928Tau trig down 0.63363 0.657539057 170.9790784 5.244315964 2.97594765

TES up0.687324 0.705748725 175.9474569 0.275937515 0.156583929

TES down0.658531 0.679896656 187.540898 -11.3175036 -6.422248102

Tau Eveto SF up 0.664739 0.685470568 176.2631482 -0.03975386 -0.022558786

Tau Eveto SF down Error determined during running caused by missing input ntuple sample

QCD Bin/RangeSample Fraction Cor.

Fractionσ Unc

(absolute)

Unc (%)

Nominal 0.664442 0.685203904 176.2233944 - -Range+1 0.67702 0.696497181 179.127843 -2.90444868 -1.648162943Range+2 0.666251 0.686828132 176.6411196 -0.41772521 -0.237042993Range+3 0.66633 0.686899063 176.6593619 -0.43596749 -0.247394787Range-1 0.682355 0.701287261 180.3597745 -4.13638013 -2.347236667Range-2 0.666977 0.687479978 176.8087639 -0.58536949 -0.332174675Range-3 0.677023 0.696499874 179.1285358 -2.90514143 -1.648556049Bins+1 0.698455 0.715742799 184.0775058 -7.85411139 -4.4569062Bins+2 0.648599 0.670979116 172.5650083 3.658386109 2.075993441Bins-1 0.646316 0.668929303 172.0378293 4.18556502 2.375147202Bins-2 0.668709 0.68903507 177.2087086 -0.98531424 -0.559127944Range increases/decreases in steps of 20GeV

Bin amount increases/decreases in steps of 5

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_r29

93_p937/ mc11_7TeV.117521.AlpGenPythia_P2011radHi_KTFac05CTEQ5L_ttbarlnqqNp1.merge.NTUP_TOP.e1608_a131_s1353_a145_r29



93_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_r299

3_p937/ mc11_7TeV.117531.AlpGenPythia_P2011radLo_KTFac2CTEQ5L_ttbarlnqqNp1.merge.NTUP_TOP.e1608_a131_s1353_a145_r299



3_p937/ mc11_7TeV.117534.AlpGenPythia_P2011radLo_KTFac2CTEQ5L_ttbarlnqqNp4INC.merge.NTUP_TOP.e1608_a131_s1353_a145_r

2993_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/

Back-up

Linearity Test to All Values

Y(0): -0.186462 ± 0.0013857 Slope: 1.23971 ± 0.00246245 Chi2: 32.7364 NDF: 8998

Linearity Test to Means

Slope: 1.23772 ± 0.0351884 y-intercept: -0.184483 ± 0.0198016Chi2: 0.00520053 NDF: 7

Mean Values of Ensemble Fits

Input Fraction

Previous Gaussian

Mean Output Fraction

Unc. Gaussian Mean

Output Fraction

Unc.

0.1 -0.0899462 0.00362867 -0.0998291 0.004875240.2 0.0538521 0.00207006 0.0501427 0.002417760.3 0.174326 0.00183766 0.204145 0.001873530.4 0.298044 0.00158434 0.335251 0.001705980.5 0.419200 0.00143606 0.460622 0.001475480.6 0.536226 0.00135077 0.580640 0.001344290.7 0.651246 0.00124441 0.689419 0.001148110.8 0.762769 0.00124064 0.794341 0.001164890.9 0.875338 0.00137805 0.894616 0.00111430

0.626089 0.566095 0.001322650.664442 0.651099 0.00120115

Adjust Range for Linear Fit?

Range Fit to Means Fit to All Values

Corrected σ

Y(0) Slope Y(0) Slope0.1 – 0.9 -

0.1844831.23770 -

0.1864692

1.23971 176.524

0.2 – 0.9 -0.156549

1.19581 -0.15581

5

1.19374 176.719

0.3 – 0.9 -0.124079

1.14942 -0.12331 1.1473 176.586

0.4 – 0.9 -0.099726

5

1.11622 -0.09871

07

1.11376 176.223

MC Tau PlotsMC Tau Count MC Tau Children

pdgIDMC Tau Children Count

Leptonic pdgID values: e → 11, μ → 13, τ → 15

MT Signal vs Control vs MC Backgrounds

Samples Normalized to Own Integrals

Samples Normalized to Sum of Integrals

Fits/Hists for Ensemble Tests

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

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

2

i

iiii2

σ)n(OB)D)binfrac(QC*N(Remain)*frac(QCD)g)binfrac(si*N(Remain)*(frac(Sig)n(Data)χ

N(OB) - N(Data) N(Remain)

frac(Sig) - 1 frac(QCD)

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

Highest pT bjet reconstruction Results for plot:

chi-square: 9.818 p-value: 0.7753 ndf: 14 chi/ndf: 0.7012

2nd Highest pT bjet reconstruction

Results for plot: chi-square: 13.66 p-value: 0.5517 ndf: 15 chi/ndf: 0.9107

Dijet Mass reconstruction Results for plot:


MET Results for plot:


Closest pT bjet reconstruction Results for plot:


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

Cut Sig Evts

Fakes Sig Eff. Fake Ratio

Rej Fact.

Sig/sqrt(Bkg

d)

Sig/Sqrt(Sig

+Bkgd)

C5Lep Veto

5863 1451086

- - - 4.867 4.857

C6ntaus >

0

5863 138276 1 0.09529 0.04240 15.77 15.44

C7njets

3191 11025 0.5443 0.07973 0.5318 30.39 26.76

C8MET

2583 7598 0.8095 0.6892 0.41998 29.63 25.60

C9MT

1892 3968 0.7325 0.5222 0.6510 30.04 24.72

C10bjet

1650 1230 0.8721 0.30998 1.538 47.05 30.75

C12Trig

match

941 335 0.5703 0.2724 4.925 51.41 26.34

ttbar τ + jets : Update on QCD Estimation

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