FlavorHistoryProducer.h

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#ifndef PhysicsTools_HepMCCandAlgos_interface_FlavorHistoryProducer_h
#define PhysicsTools_HepMCCandAlgos_interface_FlavorHistoryProducer_h

// -------------------------------------------------------------
// Identify the ancestry of the Quark
//
//
// Matrix Element:
//    Status 3 parent with precisely 2 "grandparents" that
//    is outside of the "initial" section (0-5) that has the
//    same ID as the status 2 parton in question.
//
// Flavor excitation:
//    Almost the same as the matrix element classification,
//    but has only one outgoing parton product instead of two.
//
// Gluon splitting:
//    Parent is a quark of a different flavor than the parton
//    in question, or a gluon. Can come from either ISR or FSR.
//
// True decay:
//    Decays from a resonance like top, Higgs, etc.
// -------------------------------------------------------------

#include "FWCore/Framework/interface/EDProducer.h"
#include <string>
#include <vector>
#include <set>
#include <utility>
#include <algorithm>

#include "DataFormats/HepMCCandidate/interface/GenParticle.h"
#include "DataFormats/Common/interface/Ptr.h"
#include "DataFormats/Candidate/interface/CandidateFwd.h"
#include "DataFormats/Candidate/interface/ShallowClonePtrCandidate.h"
#include "DataFormats/HepMCCandidate/interface/FlavorHistory.h"
#include "DataFormats/HepMCCandidate/interface/FlavorHistoryEvent.h"
#include "DataFormats/Common/interface/Handle.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include <fstream>


class FlavorHistoryProducer : public edm::EDProducer {
 public:
  FlavorHistoryProducer( const edm::ParameterSet & );
  ~FlavorHistoryProducer();

 private:
  void produce( edm::Event& e, const edm::EventSetup&) override;

  void getAncestors(const reco::Candidate &c,
            std::vector<reco::Candidate const * > & moms );

  reco::Candidate const * getSister(const reco::Candidate &c);


  reco::CandidateView::const_iterator
    getClosestJet( edm::Handle<reco::CandidateView> const & pJets,
           reco::Candidate const & parton ) const ;

  edm::EDGetTokenT<reco::CandidateView> srcToken_;               // GenParticles source collection name
  edm::EDGetTokenT<reco::CandidateView> matchedSrcToken_;        // matched particles source collection name
  double matchDR_;                  // delta r to match matched particles
  int    pdgIdToSelect_;            // pdg of hf partons to select
  double ptMinParticle_;            // minimum pt of the partons
  double ptMinShower_;              // minimum pt of the shower
  double etaMaxParticle_;           // max eta of the parton
  double etaMaxShower_;             // max eta of the shower
  std::string flavorHistoryName_;   // name to give flavor history
  bool verbose_;                    // verbose flag
};

#endif