nueP0DPileUpSystematics.cxx

#include "nueP0DPileUpSystematics.hxx"
#include "ND280AnalysisUtils.hxx"

//********************************************************************
nueP0DPileUpSystematics::nueP0DPileUpSystematics():EventWeightBase(1){
//********************************************************************

  _fgd1 = new BinnedParams("nueFGD1_P0D_PileUp",BinnedParams::k1D_SYMMETRIC);
  _fgd2 = new BinnedParams("nueFGD2_P0D_PileUp",BinnedParams::k1D_SYMMETRIC);
  SetNParameters(_fgd1->GetNBins()+_fgd2->GetNBins());
}

//********************************************************************
Weight_h nueP0DPileUpSystematics::ComputeWeight(const ToyExperiment& toy, const AnaEventC& eventBB, const ToyBoxB& box){
//********************************************************************

  Weight_h eventWeight= 1;

  const AnaEventB& event = *static_cast<const AnaEventB*>(&eventBB); 

  if( box.DetectorFV != SubDetId::kFGD1 && box.DetectorFV != SubDetId::kFGD2) return eventWeight;

  // Get the run period (from 0 to 8)
  Int_t runPeriod = anaUtils::GetRunPeriod(event.EventInfo.Run);
  
  // MainTrack should be in FV. This condition is already in box.DetectorFV
  //  if  (!anaUtils::InFiducialVolume(box.DetectorFV, box.MainTrack->PositionStart))  return eventWeight;
  
  // Get the pileup values for this run period
  Float_t pileup;
  Float_t pileup_error;
  Int_t index;
  if     (box.DetectorFV==SubDetId::kFGD1){
    if(!_fgd1->GetBinValues(runPeriod, pileup, pileup_error, index)) return eventWeight;
  }
  else if(box.DetectorFV==SubDetId::kFGD2){
    if(!_fgd2->GetBinValues(runPeriod, pileup, pileup_error, index)) return eventWeight;
  }
  else return eventWeight;
 
  // compute the weight
  eventWeight.Systematic = 1 - pileup - pileup_error * toy.GetToyVariations(_index)->Variations[index];
  eventWeight.Correction = 1 - pileup;

  return eventWeight;
}