september 13, 2005susy meeting status of eμ low-p t trileptons melisa rossi udine university
TRANSCRIPT
September 13, 2005 SUSY meeting
Status of eμ low-pT
trileptons
Melisa Rossi
Udine University
September 13, 2005 SUSY meeting
Outline
Data and MCLepton SelectionDilepton events
□ Dielectron □ Dimuon □ Electron-Muon
Conclusions - Next
September 13, 2005 SUSY 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/c2)□ ttbar (ttopel)□ WW (wtop1w)□ ZZ (Purdue)
September 13, 2005 SUSY meeting
Lepton Selection
High pT (>20GeV/c) CEM and CMUP selection□ Standard top/ewk definition
4-20GeV/c pT range □ Muon ID as in CDF 7197 (Purdue)
□ Electron ID as high pT
CEM ID Scale Factors
CMUP ID Scale Factors
SF ET CDF note 1.00 4-8GeV 7379 1.03 8-20GeV 7233 0.996 >20GeV 7309
SF ET CDF note 1.00 4-8GeV 7379 1.03 8-20GeV 7233 0.996 >20GeV 7309
SF PT CDF note 0.85 4-20GeV 7197
0.881 >20GeV 7309
SF PT CDF note 0.85 4-20GeV 7197
0.881 >20GeV 7309
September 13, 2005 SUSY meeting
Dilepton Control Regions
CR1: Z window□ 76 ≤ Mee ≤ 106 GeV/c2
CR2 : outside Z (diluted signal box) □ MET>15 GeV
□ 15 < Mee< 76 and Mee> 106 GeV/c2
September 13, 2005 SUSY meeting
Electrons ID
Χ2strip Problem CDF7309
September 13, 2005 SUSY meeting
CEM CEM -- CR1-- 224pb-1
September 13, 2005 SUSY meeting
CEM CEM -- CR2 -- 224pb-1
September 13, 2005 SUSY meeting
CEM CEM -- 224pb-1
DY WW ZZ ttbar TOT Data Signal
CR1 3353.5 ±13.2
0.90
±0.08
0.40
±0.013
0.5
±0.03
3355.3 3385 0.1
CR2 118.3 ±2.5
3.1 ±0.15
0.1
±0.008
2.2
±0.06
126.5 119 2.8
September 13, 2005 SUSY meeting
CEM CEM -- 224pb-1
September 13, 2005 SUSY meeting
CMUP CMUP-- CR1 -- 224pb-1
DY WW ZZ ttbar TOT Data Signal
CR1 727.9 ±7.06
0.2
±0.04
0.10
±0.008
0.1
±0.016
728.3 744 0.0
September 13, 2005 SUSY meeting
CEM CMUP -- CR2 -- 224pb-1
CEM 20 GeV & CMUP 8 GeV
September 13, 2005 SUSY meeting
CEM CMUP -- CR2 -- 224pb-1 CEM 8 GeV & CMUP 5 GeV
ORCEM 5 GeV & CMUP 8 GeV
September 13, 2005 SUSY meeting
CEM CMUP -- CR2 – 224pb-1
DY WW ZZ ttbar TOT Data Signal
CR2 19.9 ±1.1
2.2
±0.14
0.10
±0.006
1.6
±0.05
23.8 25 0.4
DY WW ZZ ttbar TOT Data Signal
CR2 36.1 ±1.5
2.6
±0.15
0.10
±0.009
1.9
±0.06
40.7 52 0.6
CEM 20 GeV & CMUP 8 GeV
CEM 8 GeV & CMUP 5 GeVOR
CEM 5 GeV & CMUP 8 GeV
September 13, 2005 SUSY meeting
Conclusions ans Next CEM CEM
□ Fixed Χ2strip bug
□ Difference with John from 15% to 5% CMUP CMUP
□ reasonable Zμ 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
September 13, 2005 SUSY meeting
CMUP CMUP 224pb-1