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

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Presentation on theme: "1 Update: High energy photon pairs Vladimir Litvin, Toyoko Orimoto Caltech QCD Meeting 03 July 2007."— Presentation transcript:

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

2 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 3 L1 Egamma Efficiencies SingleEG ~ 100% DoubleEG ~ 96%

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

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

6 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 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 8 Backup Slides

9 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 10 HLT Egamma Efficiencies New HighEt paths

11 11 HLT Egamma Efficiencies

12 12 HLT Egamma Efficiencies

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