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minbias vs. !minbias

Updated on Thu, 2017-06-08 14:31. Originally created by hanseul on 2017-06-08 14:15.

ADC, TAC, and TDC spectra with minbias trigger

  • minbias trigger includes either VPD-TAC or ZDC-TAC
  • Plots are generated basd on FastOffline MuDsts in the st_physics stream (similar to https://drupal.star.bnl.gov/STAR/blog/rjreed/auau-53-gev-second-look)
  • Primary vertex position: |Vz| < 50 && Vr < 2 
  • Spectra with minbias events are compared with those with events that are not selected by minbias trigger
  • Normalization is done with the number of corresponding events
 
  • There is no significant difference. 
  • Relevant code for trigger selection
Bool_t IsGoodEvent(StTriggerData* trg)
{
  unsigned long long trgmask = trg->l2sum();
 
  unsigned long long minbias = 0x8;
  Bool_t isminbias = ( (unsigned long long) trgmask & minbias ) & minbias;
  
  if(isminbias) return kTRUE;
  else return kFALSE;
}


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