Missing Et in Z Candidates

1
Missing Et in Z Candidates

• Z Candidate Selection
• ReReco with 10.08.01
• Results without NADA
• Results with NADA
• Summary

Tom Diehl Nov 15th, 2001
2
Data Event Selection

• Data Sample Root-tuples from t1.56 p10.04
• Selection Criteria (2 of )
• ET(EM)12.5 GeV
• Not ( Emfrac1 Iso0)
• -0.05
• 1.05 Emfrac 0.9
• H(41)
• Ratio (EfineHad/ETot)
• Picked the raw data (123 events) stored at
  /usrdisks/714/fnal_3/diehl/run2/wze/zcandidates/
  .raw

3
Reco 10.08.01 (No Nada)

• MET is clumpy vs. Run Number
• Later runs have lots less MET

4
Reco 10.08.01 (No Nada)

• SUM ET is clumpy vs. Run , too.
• Later runs have lots less SET

5
Reco 10.08.01 (No Nada)

• MET Details

6
Reco 10.08.01 (Yes Nada)

• Still clumpy w/ run number almost exactly the
  same values. Sum ET also.

7
Reco 10.08.01 (Yes Nada)

• MET details

8
Muon Corrected MET

• Some people are working to hustle it into
  existance.

9
Summary

• Looking at Z-ee candidates
• Good News
• There doesnt seem to be significant damage on
  this data
• Bad News
• There doesnt seem to be significant improvement
  to this data
• Main Improvement seems to be polish applied
  directly from the control room and on detector.

10
END of Presentation Beginning of storage slides