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This page documents the most important set of cuts that we reoutinely use for analysis in the beam test

System test - updated 26/11/2007

  • Look only good evetnt events with one track and a hit in the last tracaker layer
    kBaseCut = 'TkrNumTracks>=1 && Tkr1LastLayer==0'
  • Time between two events has to be greater than 1ms to cure the pedestal drift issue
    kDataCut = '(GemDeltaEventTime*50/1000000)>1. && EventGtccFifo==0'
  • Process fiducial cuts (Nicola's cuts) to remove double particles
    kEMaxCut = 1.e6
    if kEnergy>2500 :
    kBaseCut += '&& CalEnergyRaw>200'
    if (kEnergy == 500 ):
    kEMaxCut = 445./kAbsCosAngle
    elif (kEnergy == 1000 ):
    kEMaxCut = 900./kAbsCosAngle
    elif (kEnergy == 2500 ):
    kEMaxCut = 2200./kAbsCosAngle
    elif (kEnergy == 5000 ):
    kEMaxCut = 4500./kAbsCosAngle
    elif (kEnergy == 10000 ):
    kEMaxCut = 9000./kAbsCosAngle
    elif (kEnergy == 20000 ):
    kEMaxCut = 17000./kAbsCosAngle
    elif (kEnergy == 49980 ):
    kEMaxCut = 44000./kAbsCosAngle
    elif (kEnergy > 90000. and kEnergy < 100000):
    kEMaxCut = 90000./kAbsCosAngle
    elif (kEnergy > 190000. and kEnergy < 201000.):
    kEMaxCut = 140000/kAbsCosAngle
    elif (kEnergy > 270000. and kEnergy < 300001.):
    kEMaxCut = 180000/kAbsCosAngle
    kBaseCut += '&& CalEnergyRaw<%s' % kEMaxCut

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