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September 13, 2005SUSY meeting Status of eμ low-p T trileptons Melisa Rossi Udine University.

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Presentation on theme: "September 13, 2005SUSY meeting Status of eμ low-p T trileptons Melisa Rossi Udine University."— Presentation transcript:

1 September 13, 2005SUSY meeting Status of eμ low-p T trileptons Melisa Rossi Udine University

2 September 13, 2005SUSY meeting Outline Data and MC Lepton Selection Dilepton events □Dielectron □Dimuon □Electron-Muon Conclusions - Next

3 September 13, 2005SUSY meeting Data and MC Data □SUSY dilepton dataset edil0d ■Good run list v7 no silicon ▫ 224pb -1 up to February 2004 □Dielectron events: DIELECTRON_CENTRAL_4 trigger □Dimuon events: DIMUON_CMUPCMUP4 trigger □Electron-Muon events: CEM4_CMUP4 trigger MC □Signal “Anadi Point” (Vadim) □DY sexo8t (Z  ll, Inv mass>5GeV/c 2 ) □ttbar (ttopel) □WW (wtop1w) □ZZ (Purdue)

4 September 13, 2005SUSY meeting Lepton Selection High p T (>20GeV/c) CEM and CMUP selection □Standard top/ewk definition 4-20GeV/c p T range □Muon ID as in CDF 7197 (Purdue) □Electron ID as high p T CEM ID Scale Factors CMUP ID Scale Factors SF E T CDF note GeV GeV >20GeV 7309 SF E T CDF note GeV GeV >20GeV 7309 SF P T CDF note GeV >20GeV 7309 SF P T CDF note GeV >20GeV 7309

5 September 13, 2005SUSY meeting Dilepton Control Regions CR1: Z window □76 ≤ M ee ≤ 106 GeV/c 2 CR2 : outside Z (diluted signal box) □MET>15 GeV □ GeV/c 2

6 September 13, 2005SUSY meeting Electrons ID Χ 2 strip Problem CDF7309

7 September 13, 2005SUSY meeting CEM CEM -- CR pb -1

8 September 13, 2005SUSY meeting CEM CEM -- CR pb -1

9 September 13, 2005SUSY meeting CEM CEM pb -1 DYWWZZttbarTOTDataSignal CR ± ± ± ± CR ± ± ± ±

10 September 13, 2005SUSY meeting CEM CEM pb -1

11 September 13, 2005SUSY meeting CMUP CMUP-- CR pb -1 DYWWZZttbarTOTDataSignal CR ± ± ± ±

12 September 13, 2005SUSY meeting CEM CMUP -- CR pb -1 CEM 20 GeV & CMUP 8 GeV

13 September 13, 2005SUSY meeting CEM CMUP -- CR pb -1 CEM 8 GeV & CMUP 5 GeV OR CEM 5 GeV & CMUP 8 GeV

14 September 13, 2005SUSY meeting CEM CMUP -- CR2 – 224pb -1 DYWWZZttbarTOTDataSignal CR ± ± ± ± DYWWZZttbarTOTDataSignal CR ± ± ± ± CEM 20 GeV & CMUP 8 GeV CEM 8 GeV & CMUP 5 GeV OR CEM 5 GeV & CMUP 8 GeV

15 September 13, 2005SUSY meeting Conclusions ans Next CEM CEM □Fixed Χ 2 strip bug □Difference with John from 15% to 5% CMUP CMUP □reasonable Z  μ μ CEM CMUP □ (20,8) selection ~25 events □ (5,8) selection ~ 50 events Investigate discrepancies □High MET for cmup cmup □Low MET for cem cmup Add last MC samples Calculate fakes

16 September 13, 2005SUSY meeting CMUP CMUP 224pb -1


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