Photon Reconstruction 07/16/2012

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  • Even after timing cuts, still have large background under pi0 peak.

2gamma.invariantmass.b1pi.png


  • Splitoff suppression in Crystal Barrel, CLEO
    • Various discriminators to distinguish between splitoffs, photons
      • Distance/angle between potential parent cluster and potential splitoff
      • Energies of parent and splitoff
      • E9/E25 E9.E25.png
      • Left-right/up-down asymmetry
    • Feed this into a neural net to determine splitoff probability
    • Contiguous
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