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W->eν + jets Comparison of CMSSW_1_6_x and CMSSW_2_1_10

W->eν + jets Comparison of CMSSW_1_6_x and CMSSW_2_1_10. Kira Grogg University of Wisconsin -Madison. W+jets sample & selection. CMSSW_1_6_12. CMSSW_2_1_10 + tags. Summer08 W samples PAT (defaults) and Particle Flow Electrons are not yet part of PF Do not have weighted backgrounds

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W->eν + jets Comparison of CMSSW_1_6_x and CMSSW_2_1_10

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  1. W->eν + jetsComparison of CMSSW_1_6_x and CMSSW_2_1_10 Kira Grogg University of Wisconsin -Madison K. Grogg -- UW-Madison

  2. W+jets sample & selection CMSSW_1_6_12 CMSSW_2_1_10 + tags Summer08 W samples PAT (defaults) and Particle Flow Electrons are not yet part of PF Do not have weighted backgrounds no generated process info PF jets must have a pT > 15 GeV • W->eν skimmed CSA07 sample (chowder soup) • PAT (defaults) • Corrected jets must have a pT > 30 GeV K. Grogg -- UW-Madison

  3. PF Jet PT Spectrum Cuts: Tight ID Electron Pt > 20 55 < W MT < 105 15 GeV cut on uncorrected jet pT K. Grogg -- UW-Madison

  4. MET Gen & Reco Cuts: Tight ID Electron pT > 20 CMSSW_1_6_12 CMSSW_2_1_10 >=1 calo jets (pt > 30 GeV) >=1 PF jets (pt > 15 GeV) K. Grogg -- UW-Madison

  5. (Gen MET – Reco MET) / Gen MET Uncorrected MET (1_6_12) • Comparison of generated and reconstructed MET for >=1 jet events Particle Flow MET (2_1_12) Corrected MET (1_6_12) K. Grogg -- UW-Madison

  6. W mT Gen & Reco, >=1 jets Cuts: Tight ID Electron pT > 20 CMSSW_1_6_12 CMSSW_2_1_10 Improvement >=1 calo jets (pt > 30 GeV) >=1 PF jets (pt > 15 GeV) K. Grogg -- UW-Madison

  7. W PT Gen & Reco Cuts: Tight ID Electron pT > 20 CMSSW_1_6_12 CMSSW_2_1_10 Improvement >=0 calo jets >=0 PF jets K. Grogg -- UW-Madison

  8. W pT Gen & Reco, >=1 jets Cuts: Tight ID Electron pT > 20 55 < W MT < 105 CMSSW_1_6_12 CMSSW_2_1_10 Improvement >=1 calo jets (pt > 30 GeV) >=1 PF jets (pt >15 GeV) K. Grogg -- UW-Madison

  9. (Gen W pT – Reco W pT) / Gen W pT • Comparison of generated and reconstructed W pT for >=1 jet events W pT using particle flow MET W pT using uncorrected MET Improvement K. Grogg -- UW-Madison

  10. Review of Selection of W events • 1st electron pT > 20 GeV, 2nd electron pT < 20 GeV • |η| < 2.5, with 1.4442 < |η| < 1.560 excluded • Tight electron ID • W MT cut of ±25 GeV around the W mass • pat::Jets, from iterativeCone5CaloJets, pT > 30 GeV • Particle flow jet pT > 15 GeV • Both sets of jets cleaned: • No overlap (dR = 0.5) with electron from W • EM fraction < 0.9 K. Grogg -- UW-Madison

  11. Signal and Background / Cut for CMSSW_1_6_12 Sample: >=1 reco jets (PF or calo) with pt > 30 GeV

  12. Conclusions/Future Plans • Using 2_1_10 and PF shows improvements in MET and W pT K. Grogg -- UW-Madison

  13. Backups K. Grogg -- UW-Madison

  14. Electron PT Signal & Background 1 jet events 2 jet events Small dip, jets may need more cleaning Cuts: Tight ID Jet pt > 30 GeV 3 jet events 4 jet events 20 GeV cut on electron pT K. Grogg -- UW-Madison

  15. MET Signal vs Background 1 jet events 2 jet events Cuts: Tight ID Electron pT > 20 Jet pt > 30 GeV 3 jet events 4 jet events 20 GeV cut MET??? K. Grogg -- UW-Madison

  16. W MT Signal vs Background 1 jet events 2 jet events Cuts: Tight ID Electron pT > 20 Jet pt > 30 GeV 3 jet events 4 jet events 55 < W mT < 105 K. Grogg -- UW-Madison

  17. W PT Signal vs Backgrounds 1 jet events 2 jet events Cuts: Tight ID Electron pT > 20 55 < W MT < 105 Jet pt > 30 GeV Cuts: Robust ID Track isolation 3 jet events 4 jet events K. Grogg -- UW-Madison

  18. Leading Jet PT 1 jet events 2 jet events Cuts: TightID Electron pT > 20 55 < W MT < 105 3 jet events 4 jet events K. Grogg -- UW-Madison

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