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QCD MC data with PF Jets

QCD MC data with PF Jets. With Particle Flow Jets. Process Selection - ak5 PF jets - JEC: L2+L3 - |eta1| < 2.5 && |eta2| < 2.5 - Jet Pt > 30 GeV - | Δη | < 1.3 These are the Dijet analysis cuts from below paper:

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QCD MC data with PF Jets

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  1. QCD MC data with PF Jets

  2. With Particle Flow Jets Process Selection - ak5 PF jets - JEC: L2+L3 - |eta1| < 2.5 && |eta2| < 2.5 - Jet Pt > 30 GeV - |Δη| < 1.3 These are the Dijet analysis cuts from below paper: http://cms.cern.ch/iCMS/jsp/openfile.jsp?tp=draft&files=AN2010_108_v14.pdf 2 Dataset: QCDDiJet Spring10 pThat from 15 to 300 GeV With CMSSW_3_7_1 and PAT JetMETTau_PF_CUT082710_pT25_PFweight_all_101110.root

  3. M(jj) of the two leading of same event and mix event Same Events Log scale 3 Bin size for each range 2 GeV/bin from 30 to 120 5 GeV/bin from 120 to 150 10 GeV/bin from 150-250 25 GeV/bin from 250-300 50 GeV/bin from 300-400 100 GeV/bin from 400-500

  4. Same event comparison between BEST and dijet cuts 4

  5. Same event comparison between BEST and dijet cuts 5 This plot is the same as page 4 but using the maximum to normalization.

  6. With Particle Flow Jets Process Selection - ak5 PF jets - JEC: L2+L3 - |eta1| < 2.5 && |eta2| < 2.5 - Jet Pt > 25 GeV - |Δη| < 1.3 These are the Dijet analysis cuts from below paper: http://cms.cern.ch/iCMS/jsp/openfile.jsp?tp=draft&files=AN2010_108_v14.pdf 6 Dataset: QCDDiJet Spring10 pThat from 15 to 300 GeV With CMSSW_3_7_1 and PAT JetMETTau_PF_CUT082710_pT25_PFweight_all_101110.root

  7. M(jj) of the two leading of same event and mix event Same Events Log scale 7 Bin size for each range 2 GeV/bin from 30 to 120 5 GeV/bin from 120 to 150 10 GeV/bin from 150-250 25 GeV/bin from 250-300 50 GeV/bin from 300-400 100 GeV/bin from 400-500

  8. Same event comparison between BEST and dijet cuts 8

  9. Same event comparison between BEST and dijet cuts 9 This plot is the same as page 8 but using the maximum to normalization.

  10. Same event comparision 10 Comparison of same events with dijet mass cuts in different pT ( comparing page 3 and 7).

  11. Same event comparision 11 This plot is the same as page 10 but using the maximum to normalization.

  12. Keng’s opinions on the results These are what I think. Correct me if I am wrong and add more comments The QCD MC study showed the threshold effect causes the peak shift to the left when we lower the pt cut as the same result in the BEST cuts. The slopes are consistent between dijet cuts and BEST cuts for same event.

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