CaloCalibClusterTruthAttributerTool Class Reference

Concrete tool that calculates calibration hit truth energies in xAOD::CaloCluster. More...

#include <CaloCalibClusterTruthAttributerTool.h>

Inheritance diagram for CaloCalibClusterTruthAttributerTool:

Collaboration diagram for CaloCalibClusterTruthAttributerTool:

Public Member Functions
	CaloCalibClusterTruthAttributerTool (const std::string &type, const std::string &name, const IInterface *parent)
virtual	~CaloCalibClusterTruthAttributerTool ()
virtual StatusCode	calculateTruthEnergies (const xAOD::CaloCluster &theCaloCluster, unsigned int numTruthParticles, const std::map< Identifier, std::vector< const CaloCalibrationHit * > > &identifierToCaloHitMap, std::vector< std::pair< unsigned int, double > > &barcodeTrueCalHitEnergy) const override
	This calculates the truth energies of N leading truth particles in a topocluster. More...

Private Attributes
Gaudi::Property< bool >	m_fullTruthEnergy {this,"storeFullTruthEnergy",false,"Toggle storage of invisible and escaped energy"}
	Toggle storage of invisible and escaped energy - by default this is false, and hence we do not store the invisible or escaped calibration hit truth (ctt) energy. More...
Gaudi::Property< bool >	m_useCellWeights {this,"useCellWeights",false,"Toggle whether to use cell weights or not to calculate calibration hit contribution"}
	Toggle whether to use cell weights or not to calculate calibration hit contribution. More...

Detailed Description

Concrete tool that calculates calibration hit truth energies in xAOD::CaloCluster.

Definition at line 13 of file CaloCalibClusterTruthAttributerTool.h.

Constructor & Destructor Documentation

CaloCalibClusterTruthAttributerTool()

CaloCalibClusterTruthAttributerTool::CaloCalibClusterTruthAttributerTool	(	const std::string &	type,
		const std::string &	name,
		const IInterface *	parent
	)

Definition at line 7 of file CaloCalibClusterTruthAttributerTool.cxx.

                                                                                                                                                : base_class(type,name,parent) {
}

~CaloCalibClusterTruthAttributerTool()

CaloCalibClusterTruthAttributerTool::~CaloCalibClusterTruthAttributerTool ( )

virtualdefault

Member Function Documentation

calculateTruthEnergies()

StatusCode CaloCalibClusterTruthAttributerTool::calculateTruthEnergies ( const xAOD::CaloCluster &  theCaloCluster, unsigned int  numTruthParticles, const std::map< Identifier, std::vector< const CaloCalibrationHit * > > &  identifierToCaloHitMap, std::vector< std::pair< unsigned int, double > > &  barcodeTrueCalHitEnergy  ) const

overridevirtual

This calculates the truth energies of N leading truth particles in a topocluster.

Definition at line 12 of file CaloCalibClusterTruthAttributerTool.cxx.

                                                                                                                                                                                                                                                                                                              {
 
  ATH_MSG_DEBUG("In calculateTruthEnergies");
 
  const CaloClusterCellLink* theCellLinks = theCaloCluster.getCellLinks();
 
  if (!theCellLinks) {
    ATH_MSG_ERROR("A CaloCluster has no CaloClusterCellLinks");
    return StatusCode::FAILURE;
  }  
  
  std::map<unsigned int, double> truthIDTruePtMap;
 
  //Loop on calorimeter cells to sum up the truth energies of the truth particles.    
  CaloClusterCellLink::const_iterator firstCell = theCellLinks->begin();
  CaloClusterCellLink::const_iterator lastCell   = theCellLinks->end();
 
  for (; firstCell != lastCell; ++firstCell) {
    const CaloCell* thisCaloCell = (*firstCell);
    
    if (!thisCaloCell){
      ATH_MSG_WARNING("Have invalid pointer to CaloCell");
      continue;
    }
 
    //get the unique calorimeter cell identifier
    Identifier cellID = thisCaloCell->ID();
 
    //get the weight of the cell
    double cellWeight = firstCell.weight();
    
    //look up the calibration hit that corresponds to this calorimeter cell - we use find because not all calorimeter cells will have calibration hits
    std::map<Identifier,std::vector<const CaloCalibrationHit*> >::const_iterator identifierToCaloHitMapIterator = identifierToCaloHitMap.find(cellID);
    if (identifierToCaloHitMap.end() == identifierToCaloHitMapIterator) continue;
    std::vector<const CaloCalibrationHit*> theseCalibrationHits = (*identifierToCaloHitMapIterator).second;
 
    for (const auto *thisCalibrationHit : theseCalibrationHits){
      const int truthID = HepMC::barcode(thisCalibrationHit); // FIXME barcode-based until xAOD::TruthParticle supports id rather than barcode
      double thisCalHitTruthEnergy = thisCalibrationHit->energyEM() + thisCalibrationHit->energyNonEM();
      if (true == m_fullTruthEnergy) thisCalHitTruthEnergy += (thisCalibrationHit->energyEscaped() + thisCalibrationHit->energyInvisible());
 
      //This only makes sense to use for clusters that are NOT calibrated
      //If the cluster is calibrated this weight includes a calibration factor
      //which is not relevant for truth information.
      //For uncalibrated clusters it can contain a gemetrical weight
      //and also a weight due to pflow reweighting of a cell energy
      if (m_useCellWeights) thisCalHitTruthEnergy *= cellWeight;
 
      auto iterator = truthIDTruePtMap.find(truthID);
      if (iterator != truthIDTruePtMap.end()) truthIDTruePtMap[truthID] += thisCalHitTruthEnergy;
      else truthIDTruePtMap[truthID] = thisCalHitTruthEnergy;
      
    }//calibration hit loop
    
  }//loop on calorimeter cells to sum up truth energies
 
  //now create a vector with the same information as the map, which we can then sort
  std::vector<std::pair<unsigned int, double > > truthIDTruePtPairs;
 
  truthIDTruePtPairs.reserve(truthIDTruePtMap.size());
  for (const auto& thisEntry : truthIDTruePtMap) truthIDTruePtPairs.emplace_back(thisEntry);
 
  //sort vector by calibration hit truth energy
  std::sort(truthIDTruePtPairs.begin(),truthIDTruePtPairs.end(),[]( std::pair<unsigned int, double> a, std::pair<unsigned int, double> b) -> bool {return a.second > b.second;} );
 
  //store the truthID and truth energy of the top numTruthParticles truth particles
  if (numTruthParticles > truthIDTruePtPairs.size()) numTruthParticles = truthIDTruePtPairs.size();
  for ( unsigned int counter = 0; counter < numTruthParticles; counter++) truthIDTrueCalHitEnergy.push_back(truthIDTruePtPairs[counter]);
 
  for (const auto& thisPair : truthIDTrueCalHitEnergy) ATH_MSG_DEBUG("Truncated loop 2: truthID and true energy are " << thisPair.first << " and " << thisPair.second << " for cluster with e, eta of " << theCaloCluster.e() << " and " << theCaloCluster.eta() );
 
  return StatusCode::SUCCESS;
  
}

Member Data Documentation

m_fullTruthEnergy

Gaudi::Property<bool> CaloCalibClusterTruthAttributerTool::m_fullTruthEnergy {this,"storeFullTruthEnergy",false,"Toggle storage of invisible and escaped energy"}

private

Toggle storage of invisible and escaped energy - by default this is false, and hence we do not store the invisible or escaped calibration hit truth (ctt) energy.

Hence only the EM and nonEM truth ctt energy is stored by default

Definition at line 28 of file CaloCalibClusterTruthAttributerTool.h.

m_useCellWeights

Gaudi::Property<bool> CaloCalibClusterTruthAttributerTool::m_useCellWeights {this,"useCellWeights",false,"Toggle whether to use cell weights or not to calculate calibration hit contribution"}

private

Toggle whether to use cell weights or not to calculate calibration hit contribution.

Definition at line 31 of file CaloCalibClusterTruthAttributerTool.h.

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The documentation for this class was generated from the following files:

• CaloCalibClusterTruthAttributerTool.h
• CaloCalibClusterTruthAttributerTool.cxx