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NC Energy Estimators 2

NC Energy Estimators 2. Philip Rodrigues 27/03/2007. Story so far…. Look at peak and RMS of (E reco -E true )/E true Choice of reco and true Whether to include true CC events (Yes) Only ND so far. This week. Far detector too Whether to include E lepton in truth

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NC Energy Estimators 2

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  1. NC Energy Estimators 2 Philip Rodrigues 27/03/2007

  2. Story so far… • Look at peak and RMS of (Ereco-Etrue)/Etrue • Choice of reco and true • Whether to include true CC events • (Yes) • Only ND so far

  3. This week... • Far detector too • Whether to include Elepton in truth • Performance as function of true E

  4. Method (same as before) • Hedge my bets: • Run with different Etrue • Run with/without CC bg • Run with different Ereco • Plot (Ereco-Etrue)/Etrue • Fit gaussian to peak • Scale Ereco until fit peaks at 0

  5. Including Elepton in truth • Without El: • Misidentified true CC events bias scale • With El: • True CC events peak at same place as NC (no bias) • True CC peak more symmetrical and narrower Conclusion: always include true CC and Elepton from now on...

  6. Near • Best 3 reco/true pairs:

  7. Near – performance vs E Top: position of peak Bottom: RMS times sqrt(E) deweightCC flatter, but deweightNC better resolution at high E

  8. Far • Best 3 reco/true pairs:

  9. Far – performance vs E Now not much difference in flatness, but deweightNC better resolution at high E

  10. Summary • ‘Calibrating’ for all NC selected including true CC: • loses very little • potentially gains a lot • requires Elepton to be included in truth • Not sure which estimator to recommend

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