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Update: High energy photon pairs

Vladimir Litvin, Toyoko Orimoto Caltech QCD Meeting 03 July 2007. Update: High energy photon pairs. Introduction. Study to investigate L1 and HLT efficiencies and selection for an express stream for very high energy di-EM events Relevance to QCD group:

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Update: High energy photon pairs

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  1. Vladimir Litvin, Toyoko Orimoto Caltech QCD Meeting 03 July 2007 Update: High energy photon pairs

  2. Introduction • Study to investigate L1 and HLT efficiencies and selection for an express stream for very high energy di-EM events • Relevance to QCD group: • QCD backgrounds are amongst our largest • Recently written di-photon skim filter, part of QCDAnalysis/Skimming package • MC Samples: • Produced at Caltech & Fermilab (with no pileup) • Signal RS-1 G: • ~80-90k (131_hlt2,3,4,5) each for 750, 1250, 1000, & 1500 GeV mass samples (with c = 0.1) • Backgrounds from irreducible qqbar & gg: • Born: ~100k (131_hlt2,3,4,5) events • Box: ~300k (131_hlt2) and ~100k (131_hlt3,4,5) events

  3. L1 Egamma Efficiencies SingleEG ~ 100% DoubleEG ~ 96%

  4. L1 Egamma Efficiencies SingleEG ~ 100% DoubleEG ~ 97%

  5. L1 Egamma Efficiencies SingleEG ~ 100% DoubleEG ~ 97%

  6. New HLT paths in 131hlt5 • Two additional bits were added in 1_3_1_hlt5 for high energy EM stream, based on a 5% H/E cut • HLT1EMHighEt: pt > 80 GeV and HOE < 5% • HLT1EMVeryHighEt : pt > 200 GeV

  7. Next Steps • Production: • CMSSW_1_3_1_hlt6 (should be last) • Produce gamma+jet and QCD backgrounds with generator preselection (working on filter now) • Working on gamma+jets and 2gamma+jets Alpgen samples with Delhi University (S. Bhattacharia) • Analysis: • Try to reproduce results from PTDR • CSA07: • Diphoton skim for CSA07 implemented, as part of QCDAnalysis/Skimming package • Caltech to host samples as Tier2 -- see talk last week • Submitted all cfg files for CSA07 official production (for the RS-1 diphoton decay study)

  8. Backup Slides

  9. Releases and Tags CMSSW_1_3_1_hlt2 with tags: • V00-00-53 HLTrigger/btau • V00-00-26 HLTrigger/xchannel • V01-06-06 RecoLocalTracker/SiPixelClusterizer • V01-00-06 L1Trigger/L1ExtraFromDigis • V02-00-06 L1Trigger/L1ExtraFromMCTruthProd • V00-00-67 HLTrigger/Configuration CMSSW_1_3_1_hlt3 with tags: • V02-00-07 DataFormats/L1Trigger • V01-00-09 L1Trigger/L1ExtraFromDigis • V02-00-09 L1Trigger/L1ExtraFromMCTruthProd • V01-08-00-08 L1Trigger/GlobalCaloTrigger • V00-00-20-01 HLTrigger/HLTanalyzers • V00-04-06-03 HLTrigger/HLTexample • V00-00-02-02 SimCalorimetry/HcalTrigPrimProducers • V00-01-17-02 RecoTauTag/HLTProducers • V00-00-28 RecoEgamma/EgammaHLTProducers • V00-00-06 EventFilter/EcalDigiToRaw • V00-00-01-08 EventFilter/EcalRawToDigiDev • V01-01-09 DataFormats/EcalRawData • V00-00-10 Geometry/EcalMapping • V00-01-32 HLTrigger/Muon • V00-00-07-09 HLTrigger/JetMET • V00-00-33 HLTrigger/Egamma • V00-00-78 HLTrigger/btau • V00-00-40 HLTrigger/xchannel • V00-01-03 HLTrigger/Configuration CMSSW_1_3_1_hlt4 with tags: • V00-00-20-07 L1Trigger/RegionalCaloTrigger • V00-00-34 RecoEgamma/EgammaHLTProducers • V00-03-00 RecoTracker/SpecialSeedGenerators • V00-04-10 RecoMuon/CosmicMuonProducer • V00-02-03-03 RecoMuon/TrackerSeedGenerator; • V00-07-07-05 RecoMuon/GlobalTrackFinder • V00-01-14 HLTrigger/Configuration CMSSW_1_3_1_hlt5 with tags: • V00-01-10 Utilities/ReleaseScripts • V00-01-47 HLTrigger/Muon • V00-00-85 HLTrigger/btau • V00-00-07-15 HLTrigger/JetMET • V01-03-26 HLTrigger/HLTcore • V00-01-41 HLTrigger/Configuration

  10. HLT Egamma Efficiencies New HighEt paths

  11. HLT Egamma Efficiencies

  12. HLT Egamma Efficiencies

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