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Explore pi0 reconstruction in NCC seto using minimum cuts, achieving 55% efficiency for ephot>0.5 and energy resolution of 22%. Obtain 2.5 cm separation for real photon separation, enhancing mass resolution for E<5 GeV and 5-20 GeV energy samples.
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Minimum cuts • ephot>0.5 • eff=5482/10000=55%
Energy resolution 22% for E<5 E<5 31% for higher E higher energy
pi0 sample E<5 GeV • require asym<0.5 ephot>0.5 • can get to 2.5 cm separation real photon separation Mass
pi0 resolution E<5 GeV input to pisa smear mass input to pisa final mass recon but use real angles final mass recon
higher energy sample 5-20 GeV case where we get it wrong
Now add other particles • Primary sample pi0: 1-5 GeV • add charged pi’s 1-5 GeV add 4 pi pi0 only add 1 pi add 2 pi