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Electrons

Electrons. My code. Regularly updated, it is the code used to produce all the results from the PAT rootfile http://bourge.ucsd.edu/viewvc/UserCode/riccardo/ElectronId/. MC Sample: Z→e + e -. /Zee/Summer08_IDEAL_V11_redigi_v1/GEN-SIM-RECO Pythia Generator: √s=10 TeV MSUB(1)=1

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Electrons

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  1. Electrons

  2. My code • Regularly updated, it is the code used to produce all the results from the PAT rootfile • http://bourge.ucsd.edu/viewvc/UserCode/riccardo/ElectronId/ Electrons

  3. MC Sample: Z→e+e- • /Zee/Summer08_IDEAL_V11_redigi_v1/GEN-SIM-RECO • Pythia Generator: • √s=10 TeV • MSUB(1)=1 • MSUB(ISUB=1) switches on ISUB=1: fif̄i→γ*/Z • MSTP(43)=3 • treatment of Z/γ* interference in matrix element, compute structure with interference Z/γ* included • MDME(IDC≠182,1)=0 MEDME(182,1)=1 • only decay channel on: Z/γ*→e+e- • CKIN(1)=40 • m̂=√ŝ>40 GeV/c2 • CMSSW Generator Filter (applied before Simulation): • at least 2 e with |η|<2.7 and no pT requirements • there is no request on the charge of the 2 e: |pdgid|=11 Electrons

  4. Rec-Gen matching: ΔR Electrons

  5. Generated electrons from Z: η • no further acceptance/kinematics cuts Electrons

  6. Generated electrons from Z: pT • no further acceptance/kinematics cuts Electrons

  7. Reconstructed electrons: η • no acceptance/kinematics cuts Electrons

  8. Reconstructed electrons: pT • no further acceptance/kinematics cuts Electrons

  9. Reconstructed electrons with pT>10 GeV/c • no further acceptance/kinematics cuts 60% 28% 10% 0.02% 1.6% 0.02% Electrons

  10. ¡¡¡ READ READ READ !!! • FROM NOW ON I CONSIDER ONLY RECONSTRUCTED ELECTRONS MATCHED WITH GENERATED ELECTRONS FROM Z DECAY Electrons

  11. Reconstructed electrons MATCHED: η • no acceptance/kinematics cuts Electrons

  12. Reconstructed electrons matched: pT • no further acceptance/kinematics cuts Electrons

  13. ¡¡¡ READ READ READ !!! • FROM NOW ON I CONSIDER ONLY RECONSTRUCTED ELECTRONS MATCHED WITH GENERATED ELECTRONS FROM Z DECAY • acceptance/kinematics cuts (generator level): • only electrons from Z • reject 1.4442<|η|<1.560 • ET>5 GeV |η|<2.4 • Reconstruction Efficiency • Barrel: 0.967±0.003 • EndCaps: 0.943±0.005 • All: 0.959±0.002 Electrons

  14. Reconstruction Efficiency: η Electrons

  15. Reconstruction Efficiency: ET Barrel Electrons

  16. Reconstruction Efficiency: ET EndCaps Electrons

  17. Reconstructed electrons matched: pTrec vs pTgen Electrons

  18. Reconstructed electrons matched: pTrec-pTgen barrel Electrons

  19. Reconstructed electrons matched: pTrec-pTgen endcaps Electrons

  20. ¡¡¡ READ READ READ !!! • Electron Id. • LOOSE: green • Id/Rec Efficiency • Barrel: 0.946±0.003 • EndCaps: 0.925±0.006 • All: 0.939±0.003 • TIGHT: red • Id/Rec Efficiency • Barrel: 0.920±0.004 • EndCaps: 0.858±0.008 • All: 0.900±0.004 Electrons

  21. Eseed/pin vs fbrem (categories) Electrons

  22. |Δηin| Electrons

  23. |Δφin| Electrons

  24. H/E=EHCAL/EECAL Electrons

  25. σηη Electrons

  26. Eseed/pin Electrons

  27. Identification Efficiency: η • denominator: Reconstructed electrons Electrons

  28. Reconstruction Efficiency: ET Barrel • denominator: Reconstructed electrons Electrons

  29. Reconstruction Efficiency: ET EndCaps • denominator: Reconstructed electrons Electrons

  30. ¡¡¡ READ READ READ !!! • Mischarge fraction for the subset of Reconstructed+Identified electrons (matched to generated electrons from Z) • “Loose” id. mischarge • Barrel: 0.0026±0.0008 • EndCaps: 0.048±0.005 • All: 0.017±0.002 • “Tight” id. mischarge • Barrel: 0.0022±0.0007 • EndCaps: 0.042±0.005 • All: 0.014±0.002 Electrons

  31. Mischarged fraction: η Electrons

  32. Mischarged fraction: ET barrel Electrons

  33. Mischarged fraction: ET endcaps Electrons

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