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Top Dilepton Cross-Section in the Lepton+Track Sample: Supplementary Information

Top Dilepton Cross-Section in the Lepton+Track Sample: Supplementary Information Joe Incandela, Petra Merkel, Corrinne Mills, Pierre Savard, Teresa Spreitzer, Julia Thom, Peter Wittich. Z. W. W and Z: Validate Selection. Z checks tight lepton, track lepton (= “tl”) selection

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Top Dilepton Cross-Section in the Lepton+Track Sample: Supplementary Information

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  1. Top Dilepton Cross-Section in the Lepton+Track Sample: Supplementary Information Joe Incandela, Petra Merkel, Corrinne Mills, Pierre Savard, Teresa Spreitzer, Julia Thom, Peter Wittich

  2. Z W W and Z: Validate Selection • Z checks tight lepton, track lepton (= “tl”) selection • W checks tight lepton and missing transverse energy • W cross-sections are background-subtracted • Uncertainties quoted are statistical only • systematic uncertainties (estimated  5-10%) predominantly from lepton identification and background estimates

  3. Fake Rates • Compare among the different jet samples: Notes: • “Jet50” is data triggered by 50 GeV jets, used to construct the fake rate • Use Jet50 to predict the number of observed fake leptons in other samples triggered by similar criteria • Systematic uncertainty on fakes accounts for observed discrepancies between jet samples • Authors will work on improving this for 1 fb-1

  4. Fake Rates • Graphical representation of table on previous page Notes: • “Jet50” is data triggered by 50 GeV jets, used to construct the fake rate • Use Jet50 to predict the number of observed fake leptons in other samples triggered by similar criteria • Systematic uncertainty on fakes accounts for observed discrepancies between jet samples • Authors will work on improving this for 1 fb-1

  5. Systematic Uncertainties

  6. Cross-checks: Tight-Tight • Require track lepton to match a tight lepton in ,  • Based on track lepton pT > 20 GeV, jet ET > 20 GeV analysis • Higher purity sample (S/B  3, in main analysis is  1.) • Systematic uncertainties similar to main analysis

  7. Cross-section at Different MT

  8. Event Display: An e-m 3-jet event CDF Run II Preliminary (360 pb-1) Jet 1: ET = 67 GeV Jet 2: ET = 27 GeV tl (= CMX muon): pT = 35 GeV,  = 0.4 Jet 3: ET = 23 GeV MET: 68 GeV,  = 5.4 CEM electron: ET = 34 GeV,  = 5.3

  9. A double-tagged e-m event CDF Run II Preliminary (360 pb-1) MET: 91 GeV,  = 2.8 tl (= CMX muon): pT = 102 GeV,  = 0.8 Jet 2: ET = 37 GeV, tagged Jet 1: ET = 43 GeV, tagged Jet 3: ET = 36 GeV CEM electron: ET = 61 GeV,  = 4.8

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