PrimaryVertexAssignment Class Reference

#include <PrimaryVertexAssignment.h>

Public Types
enum	Quality {   UsedInFit =7, PrimaryDz =6, PrimaryV0 =5, BTrack =4,   Unused =3, OtherDz =2, NotReconstructedPrimary =1, Unassigned =0 }

Public Member Functions
std::pair< int, PrimaryVertexAssignment::Quality >	chargedHadronVertex (const reco::VertexCollection &vertices, const reco::TrackRef &trackRef, const edm::View< reco::Candidate > &jets, const TransientTrackBuilder &builder) const
std::pair< int, PrimaryVertexAssignment::Quality >	chargedHadronVertex (const reco::VertexCollection &vertices, const reco::PFCandidate &pfcand, const edm::View< reco::Candidate > &jets, const TransientTrackBuilder &builder) const
std::pair< int, PrimaryVertexAssignment::Quality >	chargedHadronVertex (const reco::VertexCollection &vertices, const reco::RecoChargedRefCandidate &chcand, const edm::View< reco::Candidate > &jets, const TransientTrackBuilder &builder) const
	PrimaryVertexAssignment (const edm::ParameterSet &iConfig)
	~PrimaryVertexAssignment ()

Private Attributes
double	maxDistanceToJetAxis_
double	maxDxyForJetAxisAssigment_
double	maxDxyForNotReconstructedPrimary_
double	maxDxySigForNotReconstructedPrimary_
double	maxDzForJetAxisAssigment_
double	maxDzForPrimaryAssignment_
double	maxDzSigForPrimaryAssignment_
double	maxJetDeltaR_
double	minJetPt_

Detailed Description

Definition at line 18 of file PrimaryVertexAssignment.h.

Member Enumeration Documentation

enum PrimaryVertexAssignment::Quality

Enumerator
UsedInFit
PrimaryDz
PrimaryV0
BTrack
Unused
OtherDz
NotReconstructedPrimary
Unassigned

Definition at line 20 of file PrimaryVertexAssignment.h.

{UsedInFit=7,PrimaryDz=6,PrimaryV0=5,BTrack=4,Unused=3,OtherDz=2,NotReconstructedPrimary=1,Unassigned=0};

Constructor & Destructor Documentation

PrimaryVertexAssignment::PrimaryVertexAssignment ( const edm::ParameterSet &  iConfig )

inline

Definition at line 22 of file PrimaryVertexAssignment.h.

                                                         :
   maxDzSigForPrimaryAssignment_(iConfig.getParameter<double>("maxDzSigForPrimaryAssignment")),
   maxDzForPrimaryAssignment_(iConfig.getParameter<double>("maxDzForPrimaryAssignment")),
   maxJetDeltaR_(iConfig.getParameter<double>("maxJetDeltaR")),
   minJetPt_(iConfig.getParameter<double>("minJetPt")),
   maxDistanceToJetAxis_(iConfig.getParameter<double>("maxDistanceToJetAxis")),
   maxDzForJetAxisAssigment_(iConfig.getParameter<double>("maxDzForJetAxisAssigment")),
   maxDxyForJetAxisAssigment_(iConfig.getParameter<double>("maxDxyForJetAxisAssigment")),
   maxDxySigForNotReconstructedPrimary_(iConfig.getParameter<double>("maxDxySigForNotReconstructedPrimary")),
   maxDxyForNotReconstructedPrimary_(iConfig.getParameter<double>("maxDxyForNotReconstructedPrimary"))
  {}

PrimaryVertexAssignment::~PrimaryVertexAssignment ( )

inline

Definition at line 34 of file PrimaryVertexAssignment.h.

{}

Member Function Documentation

std::pair< int, PrimaryVertexAssignment::Quality > PrimaryVertexAssignment::chargedHadronVertex	(	const reco::VertexCollection &	vertices,
		const reco::TrackRef &	trackRef,
		const edm::View< reco::Candidate > &	jets,
		const TransientTrackBuilder &	builder
	)		const

Definition at line 11 of file PrimaryVertexAssignment.cc.

References funct::abs(), edm::View< T >::at(), edm::View< T >::begin(), BTrack, TransientTrackBuilder::build(), deltaR(), reco::deltaR(), HLT_25ns14e33_v1_cff::distance, edm::View< T >::end(), cmsHarvester::index, IPTools::jetTrackDistance(), maxDistanceToJetAxis_, maxDxyForJetAxisAssigment_, maxDxyForNotReconstructedPrimary_, maxDxySigForNotReconstructedPrimary_, maxDzForJetAxisAssigment_, maxDzSigForPrimaryAssignment_, maxJetDeltaR_, HLT_25ns14e33_v1_cff::minDeltaR, minJetPt_, NotReconstructedPrimary, OtherDz, PrimaryDz, Unassigned, UsedInFit, and w.

Referenced by chargedHadronVertex().

                                                                               {

  int iVertex = -1;
  size_t index=0;
  typedef reco::VertexCollection::const_iterator IV;
  typedef reco::Vertex::trackRef_iterator IT;
  float bestweight=0;
  for( auto const & vtx : vertices) {
      float w = vtx.trackWeight(track);
      if (w > bestweight){
          bestweight=w;
          iVertex=index;
        }        
      index++;
  }


  if(iVertex >= 0 ) return std::pair<int,PrimaryVertexAssignment::Quality>(iVertex,PrimaryVertexAssignment::UsedInFit);

    double dzmin = 1e99;
    int vtxIdMinDz = -1;
    for(IV iv=vertices.begin(); iv!=vertices.end(); ++iv) {
      double dz = std::abs(track->dz(iv->position()));
      if(dz<dzmin) {
        dzmin = dz;
        vtxIdMinDz = iv-vertices.begin();
      }
   }
  // first use "closest in Z" with tight cuts (targetting primary particles)
    if(vtxIdMinDz>=0 and (dzmin < maxDzForPrimaryAssignment_ or dzmin/track->dzError() < maxDzSigForPrimaryAssignment_ ))
    {
        iVertex=vtxIdMinDz;
    }
  if(iVertex >= 0 ) return std::pair<int,PrimaryVertexAssignment::Quality>(iVertex,PrimaryVertexAssignment::PrimaryDz);

  // if track not assigned yet, it could be a b-decay secondary , use jet axis dist criterion
    // first find the closest jet within maxJetDeltaR_
    int jetIdx = -1;
    double minDeltaR = maxJetDeltaR_;
    for(edm::View<reco::Candidate>::const_iterator ij=jets.begin(); ij!=jets.end(); ++ij)
    {
      if( ij->pt() < minJetPt_ ) continue; // skip jets below the jet Pt threshold

      double deltaR = reco::deltaR( *ij, *track );
      if( deltaR < minDeltaR )
      {
        minDeltaR = deltaR;
        jetIdx = std::distance(jets.begin(), ij);
      }
    }
    // if jet found
    if( jetIdx!=-1 )
    {
      reco::TransientTrack transientTrack = builder.build(*track);
      GlobalVector direction(jets.at(jetIdx).px(), jets.at(jetIdx).py(), jets.at(jetIdx).pz());
      // find the vertex with the smallest distanceToJetAxis that is still within maxDistaneToJetAxis_
      int vtxIdx = -1;
      double minDistanceToJetAxis = maxDistanceToJetAxis_;
      for(IV iv=vertices.begin(); iv!=vertices.end(); ++iv)
      {
        // only check for vertices that are close enough in Z and for tracks that have not too high dXY
        if(std::abs(track->dz(iv->position())) > maxDzForJetAxisAssigment_ || std::abs(track->dxy(iv->position())) > maxDxyForJetAxisAssigment_) 
          continue;

        double distanceToJetAxis = IPTools::jetTrackDistance(transientTrack, direction, *iv).second.value();
        if( distanceToJetAxis < minDistanceToJetAxis )
        {
          minDistanceToJetAxis = distanceToJetAxis;
          vtxIdx = std::distance(vertices.begin(), iv);
        }
      }
      if( vtxIdx>=0 )
      {
        iVertex=vtxIdx;
      }
    }
  if(iVertex >= 0 )
     return std::pair<int,PrimaryVertexAssignment::Quality>(iVertex,PrimaryVertexAssignment::BTrack);

  // if the track is not compatible with other PVs but is compatible with the BeamSpot, we may simply have not reco'ed the PV!
  //  we still point it to the closest in Z, but flag it as possible orphan-primary
  if(track->dxy(vertices[0].position())<maxDxyForNotReconstructedPrimary_ && track->dxy(vertices[0].position())/track->dxyError()<maxDxySigForNotReconstructedPrimary_)
     return std::pair<int,PrimaryVertexAssignment::Quality>(vtxIdMinDz,PrimaryVertexAssignment::NotReconstructedPrimary);
 
  //FIXME: here we could better handle V0s and NucInt

  // all other tracks could be non-B secondaries and we just attach them with closest Z
  if(vtxIdMinDz>=0)
     return std::pair<int,PrimaryVertexAssignment::Quality>(vtxIdMinDz,PrimaryVertexAssignment::OtherDz);

  //If for some reason even the dz failed (when?) we consider the track not assigned
  return std::pair<int,PrimaryVertexAssignment::Quality>(-1,PrimaryVertexAssignment::Unassigned);
}

std::pair<int,PrimaryVertexAssignment::Quality> PrimaryVertexAssignment::chargedHadronVertex ( const reco::VertexCollection &  vertices, const reco::PFCandidate &  pfcand, const edm::View< reco::Candidate > &  jets, const TransientTrackBuilder &  builder  ) const

inline

Definition at line 57 of file PrimaryVertexAssignment.h.

References chargedHadronVertex(), edm::Ref< C, T, F >::isNull(), fwrapper::jets, reco::PFCandidate::trackRef(), and Unassigned.

                                                                               {
      if(pfcand.trackRef().isNull())
         return std::pair<int,PrimaryVertexAssignment::Quality>(-1,PrimaryVertexAssignment::Unassigned);
      return chargedHadronVertex(vertices,pfcand.trackRef(),jets,builder);
  }

std::pair<int,PrimaryVertexAssignment::Quality> PrimaryVertexAssignment::chargedHadronVertex ( const reco::VertexCollection &  vertices, const reco::RecoChargedRefCandidate &  chcand, const edm::View< reco::Candidate > &  jets, const TransientTrackBuilder &  builder  ) const

inline

Definition at line 65 of file PrimaryVertexAssignment.h.

References chargedHadronVertex(), edm::Ref< C, T, F >::isNull(), fwrapper::jets, reco::RecoChargedRefCandidate::track(), and Unassigned.

                                                                               {
      if(chcand.track().isNull())
         return std::pair<int,PrimaryVertexAssignment::Quality>(-1,PrimaryVertexAssignment::Unassigned);
      return chargedHadronVertex(vertices,chcand.track(),jets,builder);
  }

Member Data Documentation

double PrimaryVertexAssignment::maxDistanceToJetAxis_

private

Definition at line 80 of file PrimaryVertexAssignment.h.

Referenced by chargedHadronVertex().

double PrimaryVertexAssignment::maxDxyForJetAxisAssigment_

private

Definition at line 82 of file PrimaryVertexAssignment.h.

Referenced by chargedHadronVertex().

double PrimaryVertexAssignment::maxDxyForNotReconstructedPrimary_

private

Definition at line 84 of file PrimaryVertexAssignment.h.

Referenced by chargedHadronVertex().

double PrimaryVertexAssignment::maxDxySigForNotReconstructedPrimary_

private

Definition at line 83 of file PrimaryVertexAssignment.h.

Referenced by chargedHadronVertex().

double PrimaryVertexAssignment::maxDzForJetAxisAssigment_

private

Definition at line 81 of file PrimaryVertexAssignment.h.

Referenced by chargedHadronVertex().

double PrimaryVertexAssignment::maxDzForPrimaryAssignment_

private

Definition at line 77 of file PrimaryVertexAssignment.h.

double PrimaryVertexAssignment::maxDzSigForPrimaryAssignment_

private

Definition at line 76 of file PrimaryVertexAssignment.h.

Referenced by chargedHadronVertex().

double PrimaryVertexAssignment::maxJetDeltaR_

private

Definition at line 78 of file PrimaryVertexAssignment.h.

Referenced by chargedHadronVertex().

double PrimaryVertexAssignment::minJetPt_

private

Definition at line 79 of file PrimaryVertexAssignment.h.

Referenced by chargedHadronVertex().