PartonHistoryUtils.h

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/*
   Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
#ifndef ANALYSISTOP_TOPPARTONS_TOPPARTONUTILS_H
#define ANALYSISTOP_TOPPARTONS_TOPPARTONUTILS_H
 
#include "xAODTruth/TruthParticleContainer.h"
 
#include "TLorentzVector.h"
#include <string>
 
namespace xAOD{
  class PartonHistory;
}
 
namespace top {
namespace PartonHistoryUtils {
 
  struct HiggsDecay {
    TLorentzVector decay1_vector;
    int decay1_pdgId;
    TLorentzVector decay2_vector;
    int decay2_pdgId;
    int tau_decay1_isHadronic;
    int tau_decay2_isHadronic;
 
    TLorentzVector decay1_from_decay1_vector;
    int decay1_from_decay1_pdgId;
    TLorentzVector decay2_from_decay1_vector;
    int decay2_from_decay1_pdgId;
    TLorentzVector decay1_from_decay2_vector;
    int decay1_from_decay2_pdgId;
    TLorentzVector decay2_from_decay2_vector;
    int decay2_from_decay2_pdgId;
    int tau_decay1_from_decay1_isHadronic;
    int tau_decay2_from_decay1_isHadronic;
    int tau_decay1_from_decay2_isHadronic;
    int tau_decay2_from_decay2_isHadronic;
  };
 
  const xAOD::TruthParticle* findAfterFSR(const xAOD::TruthParticle* particle);
  
  bool hasParticleIdenticalParent(const xAOD::TruthParticle* particle);
 
  const xAOD::TruthParticle* findAfterGamma(const xAOD::TruthParticle* particle);
  
  HiggsDecay AnalyzeHiggsDecay(const xAOD::TruthParticle* higgs);
  
  bool TauIsHadronic(const xAOD::TruthParticle* tau, bool &isOk);
  
  void 
  decorateWithMPtPhi(xAOD::PartonHistory* pHistory, const std::string & prefix, const TLorentzVector & vec );
}
}
 
#endif