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final state study

This study conducted at the University of Rochester focuses on processes involving final states with proton and muon tracks to determine primary vertices, using truth information for gamma association and momentum calculations.

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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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