Current particle cuts


Basic track quality:
  • Fit/Quality/Helix/seedQuality/Quality Fit/Quality Fit Abort all O.K.
  • Degrees of Freedom > 0
  • Hits and Hits Expected > 0
  • 0.5 ≤ Hit Fraction ≤ 1.2
  • |z0| < 5 cm
  • |r0| < 5 mm
  • red. Χ2 ≤ 5.0
  • cos θ ≤ 0.93

Particle type Track/Shower quality cuts PID cuts
Kaon Basic TQ with kaon hypothesis
  • Has dE/dx info
  • If no RICH: |σK| < 3.0

  • If RICH, |p| ≤ 550 MeV: # γ ≤ 4 and |σK| < 3.0
    If RICH, |p| > 550 MeV: # γ ≥ 1 and (LLHπ - LLHK + σπ2 - σK2) > 0
Electron Basic TQ with electron hypothesis
f_with_rich ≥ 0.9 (Chul Su's package)
Pion Using Ds Producer defaults
Photon
  • E9/E25 O.K.
  • Not hot
  • No matched track
  • Splitoff O.K.
  • In endcap or barrel
  • No π0 rejection
Pi0
  • Both showers are E9/E25 O.K., not hot, have no matched track, are in either the endcap or the barrel, and are splitoff O.K.
  • At least one shower is in the barrel
  • Eγ > 50 MeV
  • mπ| ≤ 3.5
  • |mπ - mπPDG| ≤ 10 MeV