final state study

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final state study

• Jaewon Park
• University of Rochester

MINERvA/Jupiter Group Meeting, Jan 31, 2007
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Processes involving with final state

• Proton and muon tracks will determine primary
  vertex
• Two gammas are from

NC
CC
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ECAL for

• Generate single pi0 event
• Theta0, 20cm from US-ECAL
• 200MeV to 1GeV
• OD hit ignored
• Energy summed using dE/dx weighting

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Processes involving with final state

• Truth primary vertex is used
• Didnt require minimum angle between two gammas
• I used truth information to know which gammas is
  associated with each hits.
• Calculate gammas momentum from direction and
  energy

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Sanity check

• Compare reconstructed gamma with truth information

Truth info
Using center of energy
Difference
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Sanity check(2)
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invariant mass

• Itll be useful to use this quantity in filter
  out background.

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resolution

• Good agreement with ECAL calculation

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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