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Trilepton searches in p11.12 data

Trilepton searches in p11.12 data. Search for eee, eeμ, eμμ, μμμ, and eventually more leptons. Characteristics of the input dataset. Dataset p11.12.01 streamed by TOP Group: http://www-clued0.fnal.gov/~golling/top_dqm/processing_status.html

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Trilepton searches in p11.12 data

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  1. Trilepton searches in p11.12 data Search for eee, eeμ, eμμ, μμμ, and eventually more leptons. Anne-Marie Magnan---ISN Grenoble

  2. Characteristics of the input dataset • Dataset p11.12.01 streamed by TOP Group: http://www-clued0.fnal.gov/~golling/top_dqm/processing_status.html - DiEM selection : 2 EM particles with pt > 12 GeV and |id| = 10 or 11. - DiMUON selection : 2 μ with pt > 2 GeV and whits_a  2whits_bc  2 shits_a  1 shits_bc  1. - EM + μ selection : one EM particle with pt > 10 GeVand one μ with pt > 2 GeV. • Runs 155554 to 165775, from 1st June 2002 to 8th Oct 2002. • Bad muons runs removed, bad SMT and CFT also. • Luminosity : 3.57 pb-1 for EM_MX. Anne-Marie Magnan---ISN Grenoble

  3. Further selection • Use of MuoCandidate and EmCandidate classes  Certified Objects. • Analyze performed with certified cuts : • for muons: in GetMuoCandidate Class : MuoCandidate::All, doCalTracking = false, CutCosmics = true, selection of mediumquality μ, and |timeBC(µ) – timeA(µ)| < 10. • for EM objects: EM fraction > 0.9, Isolation < 0.15, HMatrix < 100, removed EM objects in phi cracks. Anne-Marie Magnan---ISN Grenoble

  4. Some more cuts • At least 3 leptons:  Anne-Marie Magnan---ISN Grenoble

  5. Characteristics of eee sample • 1st electron: 0are matched, • 2nd electron: 3 are matched with - sign, • 3rd electron: 1is matched with + sign.  new cuts : distance between electrons > 0.7 and at least one track match.  Remains 2 events with 3 electrons. Anne-Marie Magnan---ISN Grenoble

  6. C : central F:forward L : local Remaining events corrected certified Anne-Marie Magnan---ISN Grenoble

  7. µµµ : ?? • low PT, • 2 µ are close, • MET = 19 GeV, • Mµ2µ3=5.6 GeV, • JΨ ?? • e : 21 GeV • υe : MET = 35 GeV • Mµ+µ-= 77 GeV Jets faking electrons eυe µ+µ- Possible interpretation of the events • eee : • 1st event : Z γ  e+e- γ • 2nd event : Z  e+e-  e+e- γ • eµµ : • Z W ! Anne-Marie Magnan---ISN Grenoble

  8. Lego view of eee event 2 Run 164 537 Event 42 768 888 e1= γ e3= e+ jet MET=16 GeV + PT (jet)= 37 GeV e2= e- Anne-Marie Magnan---ISN Grenoble

  9. XY view of eee event 2 jet e2= e- e3= e+ e1= γ Anne-Marie Magnan---ISN Grenoble

  10. Perspectives • Switch to the Thumbnails, to analyze p13 data, • Add Monte-Carlo simulation, to study the instrumental and physic background, • Add trigger requirement and study efficiency with trigger simulation, • Searches for dilepton + jets.  Anne-Marie Magnan---ISN Grenoble

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