Daily works in February

Mon. 18.

  • ttbar Full hadronic
    I got the only one root file of tt4jet sample. The others was running because their size is very big.
  • Generate
    I tried to generate dataset at first time. Today, I just performed example of electron gun. I used CRAB and KNU site.

Wed. 13. ~ Thur. 14.

Although I did b-tagging, the top-choise and pairing didn't make be good. I need more clear cut for pairing. So, I try to add the jet vector sum for pairing.
  • Jet vector sum
    1. Divide 6jets to two group. ( Each group must to have 3 jets. There are total 10 couples. )
    2. Check the their px,py,pz and sum all of them by vector sum.
    3. Sum two vector, result of vector sum, by scalar sumation.
    4. Perform step 1~3 for 10 couples.
    5. Compair the 10 results and choose the minimum sum.

After Jet vector sum, I did combination of hemianalysis and jet vector sum. If the jets in minimum sum have same hemisphere, output to correct pairing. If the jets in minimum sum have different hemisphere, output to wrong pairing.

Tues. 12.

I did b-tagging for pairing. I used b-tag method in SusyAnalyzer. But the tt0jet sample was not work. The cause of that was se site. That se site was not opened on this week. So, I changed my data sample to version 1_6_5. There was many se sites.
  • Performed
    • CMSSW version : CMSSW_1_6_7
    • CRAB version : CRAB_2_0_4
    • Data sample : tt0jet ~ tt4jet in 1_6_4
    • Cuts :
      • default eta and pt cut
      • b-tagging : method in SusyAnalyzer
      • pairing : hemianalysis
      • jet parton matching : used deference of degree between parton and reconstructed jet.
  • Result
    • Jet parton matching histogram

    • jet pairing histogram

    • top choise histogram

Mon. 11.

* Meeting *
  • DAQ Meeting I met prof. G.N.Kim. I told him my work. He told me how to check the score for next year CMS project and how to analysis more fast. And we talked about next work. I will do top-mass measurment in semi-leptonic channel and Ahn will do Z-boson luminosity measurment for masters degree paper. Also, He proposed us for presentation in KPS. Because any presentation in KPS has 10 score. I will discuss all of this with prof. Oh.
  • Meeting with Luc He wondered which my work was progresed or not and wanted to meet me next week. I tald him about hemianalysis and result. We will meet next week with Filip.

Mon. 4.

* Work *
I submitted the job by CRAB and BATCH. I got the result except for the tt0jet and tt1jet,
I got some result. But they are not clear because I didn't b-tagging.
  • Results :
    • jet parton matching histogram ( black line : good j-p-m, blue line : half good j-p-m, green line : bad j-p-m ) JPMsum6.jpg
      This is very similar to previous result. Only bad j-p-m plot became larger than previous bad j-p-m. This is good change.

    • jet pairing histogram ( blue line : correct pairing, black line : wrong pairing )
      SumWmass.jpg DifferenceWmass.jpg
      First one is average of W-candidates' masses and second one is difference of the W-candidates' masses. Both of them are not good because they have to appear pick sharply.

    • top choice histogram (blue line : signal, black line : background )
      Topmass.jpg DifferenceTmass.jpg
      First one is mass distribution of the chosen top and second one is difference of the two tops. Mass distribution is very strange because top mass is about 175 GeV/c^2.

  • Conclusion and have to do Every plots are smooth. And chosen top mass is too small. I have to do b-tagging and add the pairing method by vector sum.

Fri. 1.

* Office 8 R-002 *
I tried to install the printer. First time, I tried to install by USB but that was not possible. So, I tried to install by network. There was just 4 outlet in office 8 R-002 and they were already used. For this case, there are FANOUT service in CERN. If I request more outlet, I can get the ethernet hub from IT building. And then, I can have more outlet. So, I did it. And now, anybody( if they are in office 8 R-002 ) can use this printer.

-- JeewonSeo - 04 Feb 2008

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