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final state study

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  1. final state study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Jan 31, 2007

  2. Processes involving with final state • Proton and muon tracks will determine primary vertex • Two gammas are from NC CC

  3. ECAL for • Generate single pi0 event • Theta=0, 20cm from US-ECAL • 200MeV to 1GeV • OD hit ignored • Energy summed using dE/dx weighting

  4. Processes involving with final state • Truth primary vertex is used • Didn’t require minimum angle between two gammas • I used truth information to know which gammas is associated with each hits. • Calculate gamma’s momentum from direction and energy

  5. Sanity check • Compare reconstructed gamma with truth information Truth info Using center of energy Difference

  6. Sanity check(2)

  7. invariant mass • It’ll be useful to use this quantity in filter out background.

  8. resolution • Good agreement with ECAL calculation

  9. Next step • Do same thing with real pi0 event • Determine primary vertex from proton track • Scintillator bar ID can be used in stead of using truth hit position

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