Particle Flow Calorimetry and ILC Detector Design - Center for High ...
Particle Flow Calorimetry and ILC Detector Design - Center for High ...
Particle Flow Calorimetry and ILC Detector Design - Center for High ...
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CCAST-Tsinghua School, 26/4/2009 Mark Thomson 37 Current per<strong>for</strong>manceBenchmark per<strong>for</strong>mance using<strong>and</strong> events (clean, no neutrinos)Test at <strong>for</strong> different energies withdecays at restOPAL tune of Pythia fragmentationFull reconstruction (track + calo) usingno Monte Carlo “cheat” in<strong>for</strong>mationNOTE:• Quoting rms of reconstructed energy distribution is misleading• <strong>Particle</strong> <strong>Flow</strong> occasionally goes very wrong tails dominate rms• Conventional to measure per<strong>for</strong>mance using rms90 which isrelatively insensitive to tails
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