HCALJetMET Status

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HCAL/JetMET Status
PRS Physics Reconstruction and
Selection HCAL/JetsMET group

• Shuichi Kunori
• U. of Maryland
• 13-June-2002
• http//computing.fnal.gov/cms/jpg/Default.htm

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PRS Milestonesfor DAQ TDR HLT section

• Tasks
• Data production digi - done /
  ntuple - half way
• Jet energy scale done, but...
• Algorithm for high lumi. same as low lumi
• Rates, CPU tau, SUSY

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Status of Production

• Event Sample
• HLT Sample (QCD jets)
• CMSIM-125 - done
• ORCA6 digi for 2E33 E34 done
• Ntuple production half way, but
• Signal
• H -gt tautau, high mass SUSY
• CMSIM/ORCA6/Ntuple - done
• HF in ORCA6
• Problem- 1) Eta value shifted by ½ tower
• 2) Energy scale 2 off
• Cause- Those were changed in CMSIM,
• but no corresponding changes
  in ORCA.
• Fix - put a patch in ORCA6 to return
  correct eta value
• for HF tower (Cell ID) and right
  energy for Digi.
• Use the fixed version for Ntuple production and
  all other ORCA6 analyses.

4
Jet Energy Correction
(A.Krokhotine)
CMS125(GCALOR) 10 higher response wrt
CMS120(GHISHA)
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L2 Tau
See A. Nikitenkos talk at the JetMET session on
Wednesday, 12-June-2002 for more detail.
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(No Transcript)
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(No Transcript)
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L2 Calo Tau ID with em isolation
Similar to ORCA5 results.
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L2 Tau IDCalo / Pixel / CaloPixel
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HLT CPU Estimates for SUSY and Taus
(A.Nikitenko)
Pentium III, 800 MHz CPU, Time in ms.

• x5 gain by
• Bart van de Vyver

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Higgs Mass Reconstruction with/without EE
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SUSY
See S.Abdullins talk at the JetMET session On
Wedensday, 12-June-2002 for more detail.
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SUSY Points
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R Parity Violation
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Kinematics
MET
ET (J1,J2)
Multiplicity
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Transverse Mass
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L1 Cuts and Rates
2KHz
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L2 Cuts and Rates
3Hz
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Conclusion

• Production
• Need a fix to the HF problem and complete the
  ntuple production for both low and high
  luminosities.
• Tau and SUSY
• Need rate calculations with full statistics.
• SUSU additional calculation for lower SUSY mass
  channels.
• Jet and MET trigger
• Rate calculation with full statistics.
• MET rates/efficiency with corrected energy
  scale.
• New Algorithms for high luminosity
• Fake jet suppression may be needed in HLT, if we
  need to trigger, ET(J) lt 50GeV.
• Need a study for dijet trigger.
• Is current L2 Jet thrheshold (600GeV) too high?

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Jet Triggers (ATLAS)
(ATLAS Stephan Tapprogge, May 2002)
Need lower threshold and higher rate to tape ?