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final state study

final state study. Jaewon Park University of Rochester. MINER v A/Jupiter Group Meeting, Feb 21, 2007. Energy calibration. Infinite ID. ID+ECAL+HCAL Single pi0 (theta=0) beam E(pi0)=100MeV to 1GeV Energy response is nonlinear function of beam energy especially in low energy region

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final state study

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  1. final state study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Feb 21, 2007

  2. Energy calibration Infinite ID • ID+ECAL+HCAL • Single pi0 (theta=0) beam • E(pi0)=100MeV to 1GeV • Energy response is nonlinear function of beam energy especially in low energy region • If minimum gamma energy is required , calibration got better but loose efficiency • Nonlinear calibration is tried, but it’s not good idea.

  3. mass • Pi0 mass is determined from two gamma energy and angle between them • To find out contribution of each error, try with true value • Reco edep + true dir • True edep + reco dir • Error of angle gets larger as E increases. • Pi0 mass shift is due to nonlinear energy response at low energy region.

  4. mass in infinite ID • It’s very similar to True edep + reco dir in ID+ECAL+HCAL Remarks • 2mm lead ECAL is used • In nonlinear calibration I used instead of

  5. mass in infinite ID • 2mm lead ECAL is used • In nonlinear calibration I used instead of

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