P1246341511zMLqc

1
Search for Chargino and Neutralino
CMIO implementation
Analysis blessed on July 12th Tight Muon
Tight Muon TightMuon/CMIO/Central Loose
Electron For improving the acceptance Tight
Muon Tight Muon/CMIO TightMuon/CMIO/Central
Loose Electron
CMIO ID variables Beam Constrained pt 10
GeV Not fiducial to any muon chamber Tight track
requirement n COT Ax/St (5 hits) 2 Others ID
as for stub muons Scale factor for pt 20 GeV
0.9949 (we apply the same SF for CMIO pt
GeV)
2
Reminder of the control regions
If TRILEPTON, SIGNAL REGION
nJets 1
E F
A A2
A A2
MET
10 15
G H
I J
G H
15 76 106
Invariant Mass of OS muons M??
3
Control region with 2 muons
4
Kinematic variables in region A
All regions show good agreement Region J (Z, low
Met, high jet multiplicity) needs
understanding In Tight Tight, we expect 22 and
observe 20
5
Control region with 3 leptons
Signal acceptance (anadi point) increases from
0.37 to 0.56 (plug electron will provide
additional 6) The total background increases
from 0.09 to 0.18 S/vB increases from 1.2 to 1.3
6
Validation of the 6.1 MC

• Contribute to the validation of the new 6.1
  (6.1.2pre1) Drell Yan MC
• We studied the Z into mumu sample (tewk1m)
  comparison to 5.3 Data and 5.3 Drell Yan MC
• Found a problem in the stntuple process beam
  position is not filled

Here the d0 cut is NOT applied
Here we apply the d0 cut which is based on the
corrected beam position
7
Improvement in the new MC
Z events
8
Plan

• SHORT TERM PLAN
• Public note (on going)
• Implementing Plug Electron
• Presenting to the SUSY meeting
• Processing SUSY samples produced by Liverpool in
  the range m072-190 (2 GeV step) m12162-190 (2
  GeV step) by the P5 Meeting Sept 12th (on
  going)
• LONG TERM PLAN
• Conversion rejection validation of the 6.1 data
  (September October)
• Improving the acceptance (release the CMU DX cut)
  Fake estimation (November December)
• Systematics (January)
• Blessing (February)
• Moriond 2006 is at the beginning of March