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SUSY Dilepton Trigger Calibration at Udine University Exotics Meeting

Study on calibration of L1 electron primitives for SUSY dilepton dataset using various efficiency criteria and cuts at Udine University Exotics Meeting. Analysis includes ID cuts, conversion selection, offline-online matching, and efficiency definitions.

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SUSY Dilepton Trigger Calibration at Udine University Exotics Meeting

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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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