Training for NCU students

People Involved

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• Ji-Kong Huang (黃寘耕)
• Fang-Ying Tsai (蔡芳英)
• Yu-Hsiang Chang
• Jie-Chen Lin (林傑澄)
• Yun-Ju Lu
• Darko Mekterovic
• Shin-Shan Eiko Yu

Week of 2011/02/10

• Jie-Cheng Lin : laboratory_book.rar

Week of 2012/01/31

• Fang-Ying Tsai
  • Need to find out why it took 5-6 hours to run over 2010 photon ntuples (should take around 1 hour)
  • Compare the pt and eta distributions of photon in MC and data
  • Apply pt and HLT trigger path requirements so that MC and data pt and eta spectra have similar shapes
  • Remind me your pt cuts, if it's greater than 50 GeV, change it to greater than 55 GeV
  • Compare the shower shape distribution of electrons from Z→ee in data and MC
• Chi-Kun Huang
  • Sub-divide your sample and obtain the e → γ fake rates in different eta and pt regions
  • Compare the fake rate in data and MC
  • Obtain the μ → γ fake rate

Week of 2011/12/27

• Jie-Cheng Lin : 20111227.rar

Week of 2011/12/20

• Jie-Cheng Lin : 20111220_restrict_En.rar

Week of 2011/12/13

• Jie-Cheng Lin : 20111213.rar

Week of 2011/09/07

• Kun-Jung Chiang KunJung_20110907.pdf
• Fang-Ying Tsai20110907_Fang-Ying.pdf
• Jie-Cheng Lin : Lin20110907.pdf

Week of 2011/08/31

• Kun-Jung Chiang KunJung_20110831.pdf
• Darko Unfolding1.pdf
• Yunju 2011Ana_angular_831.pdf

Week of 2011/08/24

• Yunju 2011YJAna.pdf
• Kun-Jung Chiang KunJung_20110824.pdf
• Jie-Cheng Lin : Lin20110824.pdf
• Darko Darko_Unfolding.pdf
• Shin-Shan Yu 110824_ncu.pdf

Week of 2011/08/17

• Shin-Shan Yu 110817_ncu.pdf
• Kun-Jung Chiang KunJung_20110817.pdf

Week of 2011/08/10

• Yun-Ju Lu: SYSTemplate2.pdf photon+bjet trigger Chuanzhe's talk on June 6
• Kun-Jung Chiang: KunJung_20110810.pdf
• Fany-Ying Tsai: 20110810.pdf
• Jie-Cheng Lin : Lin20110810.ppt

Week of 2011/08/03

• Kun-Jung Chiang: Kun-Jung_20110803.pdf
• Fang-Ying Tsai: FangYing_20110803.pptx
• Jie-Cheng Lin: JieChen_20110803.ppt
• Yun-Ju Lu: YunJu_20110803.pdf

Week of 2011/07/27

• Jie-Cheng Lin : Lin20110727.ppt
• Fang-Ying Tsai:20110727.pdf
• Kun-Jung Chiang: KunJung_20110727.pdf

Week of 2011/07/20

• Jie-Cheng Lin : Lin20110720.ppt
• Fang-Ying Tsai: 20110720.pdf
• Kun-Jung Chiang: KunJung_20110720.pdf
• Kun-Jung Chiang: ROOT exercise

Week of 2011/07/13

• Kun-Jung Chiang: KunJung_20110713.pdf

Week of 2011/07/06

• Kun-Jung Chiang: KunJung_20110706.pdf

Week of 2011/06/20

• Chi-Kung (黃寘耕)
  • Goal
    • Measure how often electron is mis-identified as a photon
    • Measure how often photon is mis-identified as an electron
    • Measure how often muon is mis-identified as an electron
  • Short term goal
    • Learn from Fang-Ying and Yi-Kai how to reconstruct invariant mass of di-electrons.
      • Example could be found here: Mass_Zee.C
    • Try in MC and then with 2011 data
    • Replace one of the electron with photon and see if you could see a Z mass peak
    • Data files:

                  /data/423_vgamma_42x_v5_NewRho/DoubleElectron_Run2011A_May10ReRecov1/DoubleElectron_Run2011A_May10ReRecov1.root
                 

      
      and

                  /data/423_vgamma_42x_v5_NewRho/SingleElectron_Run2011A_May10ReRecov1/SingleElectron_Run2011A_May10ReRecov1.root
                  

• Yi-Kai (吳翊楷)
  • Goal
    • Apply electron ID to MC and reconstruct Z mass peak
      • Example could be found here: Mass_Zee.C
    • Try in data and scan the mass window from 200 GeV to 1 TeV
    • Data files:

                  /data/423_vgamma_42x_v5_NewRho/DoubleElectron_Run2011A_May10ReRecov1/DoubleElectron_Run2011A_May10ReRecov1.root
                 

      
      and

                  /data/423_vgamma_42x_v5_NewRho/SingleElectron_Run2011A_May10ReRecov1/SingleElectron_Run2011A_May10ReRecov1.root
                  

• Fang-Ying (蔡芳英)
  • Goal
    • Measure electron ID efficiency in data
    • Measure jet faking electron rate in data
    • Data files:

                  /data/423_vgamma_42x_v5_NewRho/DoubleElectron_Run2011A_May10ReRecov1/DoubleElectron_Run2011A_May10ReRecov1.root
                 

      
      and

                  /data/423_vgamma_42x_v5_NewRho/SingleElectron_Run2011A_May10ReRecov1/SingleElectron_Run2011A_May10ReRecov1.root
                  

• Jie-Cheng (林傑澄)
  • Goal
    • Learn how to optimize photon ID
    • Apply jet ID and study the invariant mass of dijets and photon + 2 jets and photon+jet
      • Try your jet ID with this root file /data/syu/ggntuple_higgs/job_gjet_30to50.root
        Note, the root format is different and you need to write a different macro to obtain jet information.

• Kun-Jung (江昆嶸)
  • Goal
    • Optimize photon ID for Higgs signal

Week of 2011/05/16

• Chi-Kung (黃寘耕)
  • Learn how to plot variables of electron variables, see instruction here. (ask Fang-Ying for the electron id variables or read file 1 and file 2)
  • Compare the distributions from signal and background. The root files are here:
    • signal: /data/syu/forFangYing/DYToEE_M20_TuneZ2.root
    • background: /data/33x/ntuple_v89/31x_7TeV_QCD_EMEnriched_Pt20to30, /data/33x/ntuple_v89/31x_7TeV_QCD_EMEnriched_Pt30to80, and /data/33x/ntuple_v89/31x_7TeV_QCD_EMEnriched_Pt80to170. These MC samples need to be combined according to the proper cross section and number of generated events.
      You need to make the integrated luminosity the same for all these three samples.

                  N_gen = L * cross section 
                 

      • crossSection numbers: crossSection_QCD
• Yi-Kai (吳翊楷)
  • Finish the second question of the fitting exercise
  • Plot the distribution of electron variables and compare between signal and background
  • Read file 1 and file 2
• Fang-Ying (蔡芳英)
  • Forget about the Z mass distribution
  • Plot cos(θ*) distribution for Z' and RS graviton
  • Plot the reconstructed cos(θ*) distribution
  • Compare the cross section of Drell-Yan, RS gravition, Z' and QCD background (without requiring an electron) in various mass regions
  • Compare the number of events from Drell-Yan, RS graviton,Z' and QCD after requiring an electron in various mass region.
  • Read the dilepton search paper
• Jie-Cheng (林傑澄)
  • Produce the same histograms for the following two ROOT files and compare their distributions
    • /data/syu/31x_7TeV_PhotonJet_Pt15_pythia.root
    • /data/syu/31x_7TeV_QCD_EMEnriched_Pt20to30.root
    • Remember to require that photon Et is in the range of 20-30 GeV before you make the comparison
    • Remember to normalize each of the histogram area to 1
  • Read file 1 and file 2
• Kun-Jung (江昆嶸)
  • Plot the distributions from photons using the root files in the directory below
  • Use the ROOT files at /data/syu/ggntuple_higgs/ to optimize your selections of signal and background
    • crossSection_Higgs: crossSection_Higgs
  • Read file 1 and file 2

Week of 2011/04/25

• Chi-Kung (黃寘耕)
  • Learn how to plot variables of electron, photon, and jet ID variables, see instruction here.
• Yi-Kai (吳翊楷)
  • Finish the second question of the fitting exercise
  • Plot the distribution of electron variables and compare between signal and background
• Fang-Ying (蔡芳英)
  • Understand why cos(θ*) distribution from Drell-Yan is not what we expected.
  • Plot cos(θ*) distribution for Z' and RS graviton
• Jie-Chen (林傑澄)
  • Fix the histograms for jet IDs
  • Separate events into two classes "fabs(phoSCEta)<1.44" and "1.57 < fabs(phoSCEta) < 2.5", i.e. when photon is in the central region of the electromagnetic calorimeter and when photon is in the forward region ofo the calorimeter
  • Produce the same histograms for the following two ROOT files and compare their distributions
    • /data/syu/31x_7TeV_PhotonJet_Pt15_pythia.root
    • /data/syu/31x_7TeV_QCD_EMEnriched_Pt20to30.root
    • Remember to require that photon Et is in the range of 20-30 GeV before you make the comparison
    • Remember to normalize each of the histogram area to 1
• Kun-Jung (江昆嶸)
  • Finish poster
  • Plot distributions of photon ID variables, see instruction here.

Week of 2011/04/18

• Fang-Ying's slides
• Chi-Kung (黃寘耕)
  • Learn how to plot variables of electron, photon, and jet ID variables, see instruction here. in progress
• Yi-Kai (吳翊楷)
  • Install SLC5 and CMSSW on the student PC Done
  • Finish fitting exercise (ask Fang-Ying for details) Part I Done
  • Compare electron ID distributions between signal and background
• Fang-Ying (蔡芳英)
  • Plot cosθ^* distributions for Drell-Yan, Z^', Randall-Sundrum Graviton, and Higgs Done
    • Files are located at: /data/syu/forFangYing/
    • Note: the ntuple format of DYToEE_M20_TuneZ2.root is not the same as the other ROOT files.
  • Read more details from Muge's thesis and Prof. Chiang's paper.
• Jie-Chen (林傑澄)
  • Plot distributions of 34 photon ID variables, see instruction here. Done.
  • If you finish photon ID, plot distributions of jet ID variables. Done.
• Kun-Jung (江昆嶸)
  • Plot distributions of photon ID variables, see instruction here.
  • Finish reading the CMS photon cross-section paper and discuss on Monday April 25, 2011 afternoon. Done.

Interesting Links

• Blog of Tommaso Dorigo
• Electron Identification: EGM-10-004-pas.pdf
• Photon Identification: EGM-10-005-pas.pdf
• Isolated Photon Identification: EGM-10-006-pas.pdf
• CMS measurement of W and Z boson production cross section: fulltext.pdf

-- ShinShanYu - 24-Apr-2011