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SUSY_DILEPTON TRIGGER: Calibration of L1 electron primitives

SUSY_DILEPTON TRIGGER: Calibration of L1 electron primitives. M.Giordani,G.Pauletta, M.Rossi ,L.Santi Udine University. Electron Efficiency. PEM8 L1_EM8 E T (em) ≥ 8 GeV E had /E em ≥ 6.25% CEM4 L1_CEM4_PT4 E T (em) ≥ 4 GeV E had /E em ≤ 12.5% 4-layer XFT track P T ≥ 4.09 GeV/c.

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SUSY_DILEPTON TRIGGER: Calibration of L1 electron primitives

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  1. SUSY_DILEPTON TRIGGER:Calibration of L1 electron primitives M.Giordani,G.Pauletta,M.Rossi,L.Santi Udine University Exotics Meeting – M.Rossi

  2. Electron Efficiency • PEM8 • L1_EM8 • ET(em) ≥ 8 GeV • Ehad/Eem≥ 6.25% • CEM4 • L1_CEM4_PT4 • ET(em) ≥ 4 GeV • Ehad/Eem≤ 12.5% • 4-layer XFT track • PT≥ 4.09 GeV/c DATA SAMPLE • SUSY_DILEPTON dataset (Aug’03-June’04) ~140pb-1 • Unbiased for PEM8 • paths not requiring PEM • Unbiased for CEM4 • paths not requiring CEM Exotics Meeting – M.Rossi

  3. ID Cuts CEM • Ehad/Eem≤ 0.05 • LShr ≤ 0.2 • PAD Track • 2 Axial SL w. 5 hits • 2 Stereo SL w. 5 hits • Eop ≤ 2 • -3 ≤ qDx ≤ 1.5 cm • Dz ≤ 5 cm • Chi2 ≤ 10 • Z0 ≤ 60 cm • d0 ≤ 0.2 cm • Iso ≤ 4 GeV PEM • Ehad/Eem< 0.05 • PES 5/9 U > 0.65 • PES 5/9 V > 0.65 • PAD Track • 2 Axial SL w. 5 hits • 1 Stereo SL w. 5 hits • Eop < 3 • Z0 < 60cm Exotics Meeting – M.Rossi

  4. Conversion Selection • Preselection • |Δcotθ|<0.15 • Sxy<0.1 • Conversion tracks in diff TT • Consider 2 sub-samples • Peak |Δcotθ|<0.03 (Signal+Background) • Sideband |Δcotθ|>0.05 (Background) Exotics Meeting – M.Rossi

  5. Offline-Online matching • Offline Cluster - TriggerTower matching • trigger tower pointed by (η,Φ) of the offline cluster • Offline track – XFT track matching • SL matching : max 10 pixel between tracks • Offline-XFT tracks matched @ 3 XFT SL • XFT track – Trigger Tower matching Exotics Meeting – M.Rossi

  6. Efficiency definition • Unbinned likelihood fit of Peak & Sidebands • Likelihood definition Exotics Meeting – M.Rossi

  7. Efficiency definition • Fitting function (CDF6257) Exotics Meeting – M.Rossi

  8. Fake Fraction PEM nf ~ 0.15% CEM nf ~ 0.05% Exotics Meeting – M.Rossi

  9. L1_EM8 Efficiency ET0 10.54±0.20 σET 0.13±0.01 K∞ 1.00±0.01 Exotics Meeting – M.Rossi

  10. L1_CEM4_PT4 Efficiency ET0 3.85±0.21 σET 0.06±0.02 K∞ 0.89±0.02 Exotics Meeting – M.Rossi

  11. 2 Dim Fit Results • L1_EM8 • L1_CEM4_PT4 ET0 10.12±0.36 σET 0.13±0.02 PT0 3.53±0.36 σPT 0.03±0.02 K∞ 1.00±0.01 ET0 3.85±0.21 σET 0.06±0.02 PT0 2.29±1.97 σPT 0.01±0.10 K∞ 0.89±0.02 Exotics Meeting – M.Rossi

  12. Back-up PEM CEM Exotics Meeting – M.Rossi

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