lepton efficiency & fake rate

1. Page.1 lepton efficiency & fake rate • Content • definitions of leptons p2 • efficiency and fake rate for SU3 (12.0.6.1) p3, p4 • efficiency and fake rate for T1 (12.0.6.4) p5, p6 • topology dependence of efficiency p7 • topology dependence of fake rate p8 • data samples p9 Yousuke Kataoka University of Tokyo • Backup • without isolation condition on Truth • topology dependence of the fake rate Sep 8, 2007

2. Page.2 definitions of lepton for comparison Truth Lepton • definition1: generator-level lepton come from SUSY, W, Z, tau • definition2: leptons of def.1 and generator-level lepton come from others (such as b,c hadrons) • definition3: leptons of def.2 and leptons generated by G4 with the condition • Isolation: ET(cone0.2) < 10GeV • |eta|<2.5, pT>20GeV ※in the calculation of fake lepton for the reconstructed lepton (pT>20GeV), the pT threshold of the truth leptons (candidates of the matching) is 15GeV considering to the resolution. The isolation cut is not applied on the truth lepton. Reconstructed Lepton Electron ID • egamma Algorithm (not softe) • isEM mask 0x3ff • Isolation: ET(cone0.2) < 10GeV • |eta|<2.5, pT>20GeV Muon ID • MuID Algorithm • Combined Muon • Track match chi2 < 20 (&& >0) • Track fit chi2 / DoF < 5 • Isolation: ET(cone0.2) < 10GeV • |eta|<2.5, pT>20GeV ※in the calculation of lepton efficiency for the truth lepton (pT>20GeV), the pT threshold of the reconstructed leptons (candidates of the matching) is 15GeV considering to the resolution. • Truth Jets for the fake study • Tower Clustering with cone 0.4 • |eta|<2.5, pT>20GeV • overlaps to electron are removed with R=0.2

3. Page.3 Lepton efficiency for SU3 (12.0.6.1)(trig1_misal1_csc11.005403.SU3_jimmy_susy.recon.AOD.v12000601_tid006978)truth leptons(definition2) match reconstructed leptons with DR<0.02 75.6±0.5% 85.6±0.4% Muon pT dep. Electron pT dep. 76.6±0.5% 85.6±0.5% Electron eta dep. (pT>30GeV) Muon eta dep. (pT>30GeV) ※ pT and eta are those of truth leptons

4. numbers, efficiency, fake rate for SU3 (12.0.6.1) Page.4 • numbers of denominator ※# truth tau (hadronic decay) 7517 (pT>20GeV,|eta|<2.5) • efficiency (%) • fake rate from tau hadronic • decay is about 3% • fake rate (not matched lepton / number of TruthJet)

5. Page.5 Lepton efficiency for T1(trig1_misal1_mc12.005200.T1_McAtNlo_Jimmy.recon.AOD.v12000604_tid007900)truth leptons(definition2) match reconstructed leptons with DR<0.02 73.3±0.3% 86.0±0.2% Muon pT dep. Electron pT dep. 74.0±0.3% 86.0±0.3% Electron eta dep. (pT>30GeV) Muon eta dep. (pT>30GeV) ※ pT and eta are those of truth leptons

6. numbers, efficiency, fake rate for T1 Page.6 • numbers of denominator ※# truth tau (hadronic decay) 2320 (pT>20GeV,|eta|<2.5) • efficiency (%) • fake rate (not matched lepton / number of TruthJet) unfortunately ΔR or eta of muon is on the threshold !

7. Page.7 topology dependence of efficiency Electron efficiency (definition2 for truth, %) Muon efficiency (definition2 for truth, %) the efficiency for each eta region is stable. But inclusive electron efficiency depends on the topology (for example tt or W). This is because the eta distributions differ for those topologies. the efficiency for muon is stable

8. Page.8 topology dependence of fake lepton Electron (not matched lepton / number of TruthJet, definition2 for truth but no isolation cut) Muon (not matched lepton / number of TruthJet, definition2 for truth but no isolation cut) ～10-5 10-3～10-4

9. Page.9 data samples • SU3 (197files) trig1_misal1_csc11.005403.SU3_jimmy_susy.recon.AOD.v12000601_tid006978 • T1 (238files) trig1_misal1_mc12.005200.T1_McAtNlo_Jimmy.recon.AOD.v12000604_tid007900 Alpgen samples • tt(lνqq)+3j trig1_misal1_mc12.005533.AlpgenJimmyToplnqqNp3.recon.AOD.v12000601_tid006531 • tt(lνqq)+2j trig1_misal1_csc11.005532.AlpgenJimmyToplnqqNp2.recon.AOD.v12000601_tid006530 • tt(lνqq)+1j trig1_misal1_csc11.005531.AlpgenJimmyToplnqqNp1.recon.AOD.v12000601_tid006529 • tt(lνlν)+3j trig1_misal1_mc12.005538.AlpgenJimmyToplnlnNp3.recon.AOD.v12000601_tid006535 • W(eν)+5j trig1_misal1_mc12.005226.AlpgenJimmyWenuNp5.recon.AOD.v12000601_tid006527 • W(μν)+5j trig1_misal1_mc12.008205.AlpgenJimmyWmunuNp5.recon.AOD.v12000601_tid006541 Pythia samples • J1 trig1_misal1_csc11.005010.J1_pythia_jetjet.recon.AOD.v12000601 • J2 trig1_misal1_csc11.005011.J2_pythia_jetjet.recon.AOD.v12000601 • J3 trig1_misal1_csc11.005012.J3_pythia_jetjet.recon.AOD.v12000601 • J4 trig1_misal1_csc11.005013.J4_pythia_jetjet.recon.AOD.v12000601

10. without isolation condition on Truthfor the comparison to other groups

11. page1 with isolation cut on truth without isolation cut on truth

12. Topology dependence of the fake rate

13. T1 fake electron matched jet (origin of fake electron) pT (GeV) J1 SU3 T1 fake ratio (matched jets / jet spectrum) T1 J3 pT (GeV) page1 Topology dependence 1. pT spectrum of jets pT spectrum of jets • pT spectrum of jet highly depends on the topology • We should use fake rate as a function of pT of jets Matched jets are higher than fake electrons due to e/h correction or loose isolation condition ? dropped by pT threshold of fake electron (20GeV)

14. page2 Topology dependence 2. tau jets contribution SU3, T1 samples are tau rich, J samples are not.  tau jet contribution makes some difference tau jet (hadronic decay) contribution SU3 T1 J3 Black plot … all jets contribution Red plot … non tau jets contribution

15. page3 Topology dependence 3. effect of isolation condition We uses the following isolation condition of reconstructed electron • ET (cone 0.2) < 10 GeV J3 But, more strict condition drops the fake rate • ET (cone 0.2) < 10 GeV && • ET (cone 0.2) < 0.1 × ET of electron J3

16. page4 loose isolation condition T1 73.3% • ET (cone 0.2) < 10 GeV strict isolation condition T1 70.6% • ET (cone 0.2) < 10 GeV && • ET (cone 0.2) < 0.1 × ET of electron • We applied isolation condition on the Truth electron • ET (cone 0.2) < 10 GeV