TauPi0ClusterScaler.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TAURECTOOLS_TAUPI0CLUSTERSCALER_H
#define TAURECTOOLS_TAUPI0CLUSTERSCALER_H
 
#include <string>
#include "tauRecTools/TauRecToolBase.h"
#include "AsgTools/ToolHandle.h"
#include "xAODPFlow/PFO.h"
#include "xAODPFlow/PFOAuxContainer.h"

 
class TauPi0ClusterScaler : virtual public TauRecToolBase {
 
public:
  
  ASG_TOOL_CLASS2(TauPi0ClusterScaler, TauRecToolBase, ITauToolBase)
 
  TauPi0ClusterScaler(const std::string& name);
  virtual ~TauPi0ClusterScaler() = default;
 
  virtual StatusCode executePi0ClusterScaler(xAOD::TauJet& pTau, xAOD::PFOContainer& pNeutralPFOContainer, xAOD::PFOContainer& pChargedPFOContainer) const override; 
 
private:
  
  void clearAssociatedParticleLinks(xAOD::PFOContainer& pfoContainer, xAOD::PFODetails::PFOParticleType type) const;

  float getExtrapolatedPosition(const xAOD::PFO& chargedPFO, xAOD::TauJetParameters::TrackDetail detail) const; 

  void createChargedPFOs(xAOD::TauJet& pTau, xAOD::PFOContainer& pChargedPFOContainer) const;

  void associateHadronicToChargedPFOs(const xAOD::TauJet& pTau, xAOD::PFOContainer& pChargedPFOContainer) const;
  
  void associateChargedToNeutralPFOs(const xAOD::TauJet& pTau, xAOD::PFOContainer& pNeutralPFOContainer) const;
  
  void subtractChargedEnergyFromNeutralPFOs(const xAOD::TauJet& tau, xAOD::PFOContainer& pNeutralPFOContainer) const;
 
  Gaudi::Property<double> m_maxDeltaRNeutralCharged {this, "MaxDeltaRNeutralCharged", 0.04, "max DeltaR for neutral-charged cluster association"};
 
};
 
#endif  // TAURECTOOLS_TAUPI0CLUSTERSCALER_H