MuonPFIsolationWithConeVeto.cc

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#include "PhysicsTools/IsolationAlgos/interface/CITKIsolationConeDefinitionBase.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Framework/interface/ConsumesCollector.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidate.h"
#include "DataFormats/PatCandidates/interface/PackedCandidate.h"
#include "DataFormats/Math/interface/deltaR.h"

namespace pat {
  typedef edm::Ptr<pat::PackedCandidate> PackedCandidatePtr;
}

class MuonPFIsolationWithConeVeto : public citk::IsolationConeDefinitionBase {
public:
  MuonPFIsolationWithConeVeto(const edm::ParameterSet& c) :
    citk::IsolationConeDefinitionBase(c),
    _vetoThreshold(c.getParameter<double>("VetoThreshold")),
    _vetoConeSize2(std::pow(c.getParameter<double>("VetoConeSize"),2.0)),
    _miniAODVertexCodes(c.getParameter<std::vector<unsigned> >("miniAODVertexCodes"))
  {
    char buf[50];
    snprintf(buf,49,"ThresholdVeto%03.0f-ConeVeto%03.0f", 100*_vetoThreshold, 100*std::sqrt(_vetoConeSize2));
    _additionalCode = std::string(buf);
  }
  MuonPFIsolationWithConeVeto(const MuonPFIsolationWithConeVeto&) = delete;
  MuonPFIsolationWithConeVeto& operator=(const MuonPFIsolationWithConeVeto&) =delete;

  void setConsumes(edm::ConsumesCollector) override {}

  bool isInIsolationCone(const reco::CandidatePtr& physob,
             const reco::CandidatePtr& other) const final;

  ~MuonPFIsolationWithConeVeto() override{};

private:
  const double _vetoThreshold, _vetoConeSize2;
  const std::vector<unsigned> _miniAODVertexCodes;
  edm::EDGetTokenT<reco::VertexCollection> _vtxToken;
};

DEFINE_EDM_PLUGIN(CITKIsolationConeDefinitionFactory,
          MuonPFIsolationWithConeVeto,
          "MuonPFIsolationWithConeVeto");

bool MuonPFIsolationWithConeVeto::isInIsolationCone(const reco::CandidatePtr& physob,
                                                    const reco::CandidatePtr& iso_obj  ) const {
  const pat::PackedCandidatePtr aspacked(iso_obj);
  const reco::PFCandidatePtr aspf(iso_obj);
  const double deltar2 = reco::deltaR2(*physob,*iso_obj);

  bool result = true;
  if( aspacked.isNonnull() && aspacked.get() ) {
    if( aspacked->charge() != 0 ) {
      bool is_vertex_allowed = false;
      for( const unsigned vtxtype : _miniAODVertexCodes ) {
        if( vtxtype == aspacked->fromPV() ) {
          is_vertex_allowed = true;
          break;
        }
      }
      result = result && ( is_vertex_allowed );
    }
    result = result &&( aspacked->pt() > _vetoThreshold && deltar2 > _vetoConeSize2 && deltar2 < _coneSize2 );
  } else if ( aspf.isNonnull() && aspf.get() ) {
    result = result && ( aspf->pt() > _vetoThreshold && deltar2 > _vetoConeSize2 && deltar2 < _coneSize2 );
  } else {
    throw cms::Exception("InvalidIsolationInput")
      << "The supplied candidate to be used as isolation "
      << "was neither a reco::PFCandidate nor a pat::PackedCandidate!";
  }
  return result;
}