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TemplatedSecondaryVertexProducer.cc
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TemplatedSecondaryVertexProducer.cc
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#include <functional>
#include <algorithm>
#include <iterator>
#include <cstddef>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <boost/iterator/transform_iterator.hpp>
#include "FWCore/Framework/interface/stream/EDProducer.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"
#include "FWCore/ParameterSet/interface/IfExistsDescription.h"
#include "FWCore/Utilities/interface/InputTag.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "DataFormats/PatCandidates/interface/Jet.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/VertexReco/interface/Vertex.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/Measurement1D.h"
#include "DataFormats/BTauReco/interface/TrackIPTagInfo.h"
#include "DataFormats/BTauReco/interface/CandIPTagInfo.h"
#include "DataFormats/BTauReco/interface/SecondaryVertexTagInfo.h"
#include "RecoVertex/VertexPrimitives/interface/VertexException.h"
#include "RecoVertex/VertexPrimitives/interface/ConvertToFromReco.h"
#include "RecoVertex/ConfigurableVertexReco/interface/ConfigurableVertexReconstructor.h"
#include "RecoVertex/GhostTrackFitter/interface/GhostTrackVertexFinder.h"
#include "RecoVertex/GhostTrackFitter/interface/GhostTrackPrediction.h"
#include "RecoVertex/GhostTrackFitter/interface/GhostTrackState.h"
#include "RecoVertex/GhostTrackFitter/interface/GhostTrack.h"
#include "TrackingTools/TransientTrack/interface/TransientTrack.h"
#include "TrackingTools/TransientTrack/interface/TransientTrackBuilder.h"
#include "TrackingTools/TransientTrack/interface/CandidatePtrTransientTrack.h"
#include "TrackingTools/Records/interface/TransientTrackRecord.h"
#include "RecoBTag/SecondaryVertex/interface/TrackSelector.h"
#include "RecoBTag/SecondaryVertex/interface/TrackSorting.h"
#include "RecoBTag/SecondaryVertex/interface/SecondaryVertex.h"
#include "RecoBTag/SecondaryVertex/interface/VertexFilter.h"
#include "RecoBTag/SecondaryVertex/interface/VertexSorting.h"
#include "DataFormats/GeometryVector/interface/VectorUtil.h"
#include "fastjet/JetDefinition.hh"
#include "fastjet/ClusterSequence.hh"
#include "fastjet/PseudoJet.hh"
//
// constants, enums and typedefs
//
typedef boost::shared_ptr<fastjet::ClusterSequence> ClusterSequencePtr;
typedef boost::shared_ptr<fastjet::JetDefinition> JetDefPtr;
using namespace reco;
namespace {
class VertexInfo : public fastjet::PseudoJet::UserInfoBase{
public:
VertexInfo(const int vertexIndex) :
m_vertexIndex(vertexIndex) { }
inline const int vertexIndex() const { return m_vertexIndex; }
protected:
int m_vertexIndex;
};
template<typename T>
struct RefToBaseLess : public std::binary_function<edm::RefToBase<T>,
edm::RefToBase<T>,
bool> {
inline bool operator()(const edm::RefToBase<T> &r1,
const edm::RefToBase<T> &r2) const
{
return r1.id() < r2.id() ||
(r1.id() == r2.id() && r1.key() < r2.key());
}
};
}
GlobalVector flightDirection(const reco::Vertex & pv, const reco::Vertex & sv) {
return GlobalVector(sv.x() - pv.x(), sv.y() - pv.y(),sv.z() - pv.z());
}
GlobalVector flightDirection(const reco::Vertex & pv, const reco::VertexCompositePtrCandidate & sv) {
return GlobalVector(sv.vertex().x() - pv.x(), sv.vertex().y() - pv.y(),sv.vertex().z() - pv.z());
}
const math::XYZPoint & position(const reco::Vertex & sv)
{return sv.position();}
const math::XYZPoint & position(const reco::VertexCompositePtrCandidate & sv)
{return sv.vertex();}
template <class IPTI,class VTX>
class TemplatedSecondaryVertexProducer : public edm::stream::EDProducer<> {
public:
explicit TemplatedSecondaryVertexProducer(const edm::ParameterSet ¶ms);
~TemplatedSecondaryVertexProducer();
static void fillDescriptions(edm::ConfigurationDescriptions & descriptions);
typedef std::vector<TemplatedSecondaryVertexTagInfo<IPTI,VTX> > Product;
typedef TemplatedSecondaryVertex<VTX> SecondaryVertex;
typedef typename IPTI::input_container input_container;
typedef typename IPTI::input_container::value_type input_item;
typedef typename std::vector<reco::btag::IndexedTrackData> TrackDataVector;
virtual void produce(edm::Event &event, const edm::EventSetup &es) override;
private:
template<class CONTAINER>
void matchReclusteredJets(const edm::Handle<CONTAINER>& jets,
const std::vector<fastjet::PseudoJet>& matchedJets,
std::vector<int>& matchedIndices,
const std::string& jetType="");
void matchGroomedJets(const edm::Handle<edm::View<reco::Jet> >& jets,
const edm::Handle<edm::View<reco::Jet> >& matchedJets,
std::vector<int>& matchedIndices);
void matchSubjets(const std::vector<int>& groomedIndices,
const edm::Handle<edm::View<reco::Jet> >& groomedJets,
const edm::Handle<std::vector<IPTI> >& subjets,
std::vector<std::vector<int> >& matchedIndices);
void matchSubjets(const edm::Handle<edm::View<reco::Jet> >& fatJets,
const edm::Handle<std::vector<IPTI> >& subjets,
std::vector<std::vector<int> >& matchedIndices);
const reco::Jet * toJet(const reco::Jet & j) { return &j; }
const reco::Jet * toJet(const IPTI & j) { return &(*(j.jet())); }
enum ConstraintType {
CONSTRAINT_NONE = 0,
CONSTRAINT_BEAMSPOT,
CONSTRAINT_PV_BEAMSPOT_SIZE,
CONSTRAINT_PV_BS_Z_ERRORS_SCALED,
CONSTRAINT_PV_ERROR_SCALED,
CONSTRAINT_PV_PRIMARIES_IN_FIT
};
static ConstraintType getConstraintType(const std::string &name);
edm::EDGetTokenT<reco::BeamSpot> token_BeamSpot;
edm::EDGetTokenT<std::vector<IPTI> > token_trackIPTagInfo;
reco::btag::SortCriteria sortCriterium;
TrackSelector trackSelector;
ConstraintType constraint;
double constraintScaling;
edm::ParameterSet vtxRecoPSet;
bool useGhostTrack;
bool withPVError;
double minTrackWeight;
VertexFilter vertexFilter;
VertexSorting<SecondaryVertex> vertexSorting;
bool useExternalSV;
double extSVDeltaRToJet;
edm::EDGetTokenT<edm::View<VTX> > token_extSVCollection;
bool useSVClustering;
bool useSVMomentum;
std::string jetAlgorithm;
double rParam;
double jetPtMin;
double ghostRescaling;
double relPtTolerance;
bool useFatJets;
bool useGroomedFatJets;
edm::EDGetTokenT<edm::View<reco::Jet> > token_fatJets;
edm::EDGetTokenT<edm::View<reco::Jet> > token_groomedFatJets;
ClusterSequencePtr fjClusterSeq;
JetDefPtr fjJetDefinition;
void markUsedTracks(TrackDataVector & trackData, const input_container & trackRefs, const SecondaryVertex & sv,size_t idx);
struct SVBuilder :
public std::unary_function<const VTX&, SecondaryVertex> {
SVBuilder(const reco::Vertex &pv,
const GlobalVector &direction,
bool withPVError,
double minTrackWeight) :
pv(pv), direction(direction),
withPVError(withPVError),
minTrackWeight(minTrackWeight) {}
SecondaryVertex operator () (const TransientVertex &sv) const;
SecondaryVertex operator () (const VTX &sv) const
{ return SecondaryVertex(pv, sv, direction, withPVError); }
const Vertex &pv;
const GlobalVector &direction;
bool withPVError;
double minTrackWeight;
};
struct SVFilter :
public std::unary_function<const SecondaryVertex&, bool> {
SVFilter(const VertexFilter &filter, const Vertex &pv,
const GlobalVector &direction) :
filter(filter), pv(pv), direction(direction) {}
inline bool operator () (const SecondaryVertex &sv) const
{ return !filter(pv, sv, direction); }
const VertexFilter &filter;
const Vertex &pv;
const GlobalVector &direction;
};
};
template <class IPTI,class VTX>
typename TemplatedSecondaryVertexProducer<IPTI,VTX>::ConstraintType
TemplatedSecondaryVertexProducer<IPTI,VTX>::getConstraintType(const std::string &name)
{
if (name == "None")
return CONSTRAINT_NONE;
else if (name == "BeamSpot")
return CONSTRAINT_BEAMSPOT;
else if (name == "BeamSpot+PVPosition")
return CONSTRAINT_PV_BEAMSPOT_SIZE;
else if (name == "BeamSpotZ+PVErrorScaledXY")
return CONSTRAINT_PV_BS_Z_ERRORS_SCALED;
else if (name == "PVErrorScaled")
return CONSTRAINT_PV_ERROR_SCALED;
else if (name == "BeamSpot+PVTracksInFit")
return CONSTRAINT_PV_PRIMARIES_IN_FIT;
else
throw cms::Exception("InvalidArgument")
<< "TemplatedSecondaryVertexProducer: ``constraint'' parameter "
"value \"" << name << "\" not understood."
<< std::endl;
}
static GhostTrackVertexFinder::FitType
getGhostTrackFitType(const std::string &name)
{
if (name == "AlwaysWithGhostTrack")
return GhostTrackVertexFinder::kAlwaysWithGhostTrack;
else if (name == "SingleTracksWithGhostTrack")
return GhostTrackVertexFinder::kSingleTracksWithGhostTrack;
else if (name == "RefitGhostTrackWithVertices")
return GhostTrackVertexFinder::kRefitGhostTrackWithVertices;
else
throw cms::Exception("InvalidArgument")
<< "TemplatedSecondaryVertexProducer: ``fitType'' "
"parameter value \"" << name << "\" for "
"GhostTrackVertexFinder settings not "
"understood." << std::endl;
}
template <class IPTI,class VTX>
TemplatedSecondaryVertexProducer<IPTI,VTX>::TemplatedSecondaryVertexProducer(
const edm::ParameterSet ¶ms) :
sortCriterium(TrackSorting::getCriterium(params.getParameter<std::string>("trackSort"))),
trackSelector(params.getParameter<edm::ParameterSet>("trackSelection")),
constraint(getConstraintType(params.getParameter<std::string>("constraint"))),
constraintScaling(1.0),
vtxRecoPSet(params.getParameter<edm::ParameterSet>("vertexReco")),
useGhostTrack(vtxRecoPSet.getParameter<std::string>("finder") == "gtvr"),
withPVError(params.getParameter<bool>("usePVError")),
minTrackWeight(params.getParameter<double>("minimumTrackWeight")),
vertexFilter(params.getParameter<edm::ParameterSet>("vertexCuts")),
vertexSorting(params.getParameter<edm::ParameterSet>("vertexSelection"))
{
token_trackIPTagInfo = consumes<std::vector<IPTI> >(params.getParameter<edm::InputTag>("trackIPTagInfos"));
if (constraint == CONSTRAINT_PV_ERROR_SCALED ||
constraint == CONSTRAINT_PV_BS_Z_ERRORS_SCALED)
constraintScaling = params.getParameter<double>("pvErrorScaling");
if (constraint == CONSTRAINT_PV_BEAMSPOT_SIZE ||
constraint == CONSTRAINT_PV_BS_Z_ERRORS_SCALED ||
constraint == CONSTRAINT_BEAMSPOT ||
constraint == CONSTRAINT_PV_PRIMARIES_IN_FIT )
token_BeamSpot = consumes<reco::BeamSpot>(params.getParameter<edm::InputTag>("beamSpotTag"));
useExternalSV = false;
if(params.existsAs<bool>("useExternalSV")) useExternalSV = params.getParameter<bool> ("useExternalSV");
if(useExternalSV) {
token_extSVCollection = consumes<edm::View<VTX> >(params.getParameter<edm::InputTag>("extSVCollection"));
extSVDeltaRToJet = params.getParameter<double>("extSVDeltaRToJet");
}
useSVClustering = ( params.existsAs<bool>("useSVClustering") ? params.getParameter<bool>("useSVClustering") : false );
useSVMomentum = ( params.existsAs<bool>("useSVMomentum") ? params.getParameter<bool>("useSVMomentum") : false );
useFatJets = ( useExternalSV && params.exists("fatJets") );
useGroomedFatJets = ( useExternalSV && params.exists("groomedFatJets") );
if( useSVClustering )
{
jetAlgorithm = params.getParameter<std::string>("jetAlgorithm");
rParam = params.getParameter<double>("rParam");
jetPtMin = 0.; // hardcoded to 0. since we simply want to recluster all input jets which already had some PtMin applied
ghostRescaling = ( params.existsAs<double>("ghostRescaling") ? params.getParameter<double>("ghostRescaling") : 1e-18 );
relPtTolerance = ( params.existsAs<double>("relPtTolerance") ? params.getParameter<double>("relPtTolerance") : 1e-03); // 0.1% relative difference in Pt should be sufficient to detect possible misconfigurations
// set jet algorithm
if (jetAlgorithm=="Kt")
fjJetDefinition = JetDefPtr( new fastjet::JetDefinition(fastjet::kt_algorithm, rParam) );
else if (jetAlgorithm=="CambridgeAachen")
fjJetDefinition = JetDefPtr( new fastjet::JetDefinition(fastjet::cambridge_algorithm, rParam) );
else if (jetAlgorithm=="AntiKt")
fjJetDefinition = JetDefPtr( new fastjet::JetDefinition(fastjet::antikt_algorithm, rParam) );
else
throw cms::Exception("InvalidJetAlgorithm") << "Jet clustering algorithm is invalid: " << jetAlgorithm << ", use CambridgeAachen | Kt | AntiKt" << std::endl;
}
if( useFatJets )
token_fatJets = consumes<edm::View<reco::Jet> >(params.getParameter<edm::InputTag>("fatJets"));
if( useGroomedFatJets )
token_groomedFatJets = consumes<edm::View<reco::Jet> >(params.getParameter<edm::InputTag>("groomedFatJets"));
if( useFatJets && !useSVClustering )
rParam = params.getParameter<double>("rParam"); // will be used later as a dR cut
produces<Product>();
}
template <class IPTI,class VTX>
TemplatedSecondaryVertexProducer<IPTI,VTX>::~TemplatedSecondaryVertexProducer()
{
}
template <class IPTI,class VTX>
void TemplatedSecondaryVertexProducer<IPTI,VTX>::produce(edm::Event &event,
const edm::EventSetup &es)
{
// typedef std::map<TrackBaseRef, TransientTrack,
// RefToBaseLess<Track> > TransientTrackMap;
//How about good old pointers?
typedef std::map<const Track *, TransientTrack> TransientTrackMap;
edm::ESHandle<TransientTrackBuilder> trackBuilder;
es.get<TransientTrackRecord>().get("TransientTrackBuilder",
trackBuilder);
edm::Handle<std::vector<IPTI> > trackIPTagInfos;
event.getByToken(token_trackIPTagInfo, trackIPTagInfos);
// External Sec Vertex collection (e.g. for IVF usage)
edm::Handle<edm::View<VTX> > extSecVertex;
if(useExternalSV) event.getByToken(token_extSVCollection,extSecVertex);
edm::Handle<edm::View<reco::Jet> > fatJetsHandle;
edm::Handle<edm::View<reco::Jet> > groomedFatJetsHandle;
if( useFatJets )
{
event.getByToken(token_fatJets, fatJetsHandle);
if( useGroomedFatJets )
{
event.getByToken(token_groomedFatJets, groomedFatJetsHandle);
if( groomedFatJetsHandle->size() > fatJetsHandle->size() )
edm::LogError("TooManyGroomedJets") << "There are more groomed (" << groomedFatJetsHandle->size() << ") than original fat jets (" << fatJetsHandle->size() << "). Please check that the two jet collections belong to each other.";
}
}
edm::Handle<BeamSpot> beamSpot;
unsigned int bsCovSrc[7] = { 0, };
double sigmaZ = 0.0, beamWidth = 0.0;
switch(constraint) {
case CONSTRAINT_PV_BEAMSPOT_SIZE:
event.getByToken(token_BeamSpot,beamSpot);
bsCovSrc[3] = bsCovSrc[4] = bsCovSrc[5] = bsCovSrc[6] = 1;
sigmaZ = beamSpot->sigmaZ();
beamWidth = beamSpot->BeamWidthX();
break;
case CONSTRAINT_PV_BS_Z_ERRORS_SCALED:
event.getByToken(token_BeamSpot,beamSpot);
bsCovSrc[0] = bsCovSrc[1] = 2;
bsCovSrc[3] = bsCovSrc[4] = bsCovSrc[5] = 1;
sigmaZ = beamSpot->sigmaZ();
break;
case CONSTRAINT_PV_ERROR_SCALED:
bsCovSrc[0] = bsCovSrc[1] = bsCovSrc[2] = 2;
break;
case CONSTRAINT_BEAMSPOT:
case CONSTRAINT_PV_PRIMARIES_IN_FIT:
event.getByToken(token_BeamSpot,beamSpot);
break;
default:
/* nothing */;
}
// ------------------------------------ SV clustering START --------------------------------------------
std::vector<std::vector<int> > clusteredSVs(trackIPTagInfos->size(),std::vector<int>());
if( useExternalSV && useSVClustering && trackIPTagInfos->size()>0 )
{
// vector of constituents for reclustering jets and "ghost" SVs
std::vector<fastjet::PseudoJet> fjInputs;
// loop over all input jets and collect all their constituents
if( useFatJets )
{
for(edm::View<reco::Jet>::const_iterator it = fatJetsHandle->begin(); it != fatJetsHandle->end(); ++it)
{
std::vector<edm::Ptr<reco::Candidate> > constituents = it->getJetConstituents();
std::vector<edm::Ptr<reco::Candidate> >::const_iterator m;
for( m = constituents.begin(); m != constituents.end(); ++m )
{
reco::CandidatePtr constit = *m;
if(constit->pt() == 0)
{
edm::LogWarning("NullTransverseMomentum") << "dropping input candidate with pt=0";
continue;
}
fjInputs.push_back(fastjet::PseudoJet(constit->px(),constit->py(),constit->pz(),constit->energy()));
}
}
}
else
{
for(typename std::vector<IPTI>::const_iterator it = trackIPTagInfos->begin(); it != trackIPTagInfos->end(); ++it)
{
std::vector<edm::Ptr<reco::Candidate> > constituents = it->jet()->getJetConstituents();
std::vector<edm::Ptr<reco::Candidate> >::const_iterator m;
for( m = constituents.begin(); m != constituents.end(); ++m )
{
reco::CandidatePtr constit = *m;
if(constit->pt() == 0)
{
edm::LogWarning("NullTransverseMomentum") << "dropping input candidate with pt=0";
continue;
}
fjInputs.push_back(fastjet::PseudoJet(constit->px(),constit->py(),constit->pz(),constit->energy()));
}
}
}
// insert "ghost" SVs in the vector of constituents
for(typename edm::View<VTX>::const_iterator it = extSecVertex->begin(); it != extSecVertex->end(); ++it)
{
const reco::Vertex &pv = *(trackIPTagInfos->front().primaryVertex());
GlobalVector dir = flightDirection(pv, *it);
dir = dir.unit();
fastjet::PseudoJet p(dir.x(),dir.y(),dir.z(),dir.mag()); // using SV flight direction so treating SV as massless
if( useSVMomentum )
p = fastjet::PseudoJet(it->p4().px(),it->p4().py(),it->p4().pz(),it->p4().energy());
p*=ghostRescaling; // rescale SV direction/momentum
p.set_user_info(new VertexInfo( it - extSecVertex->begin() ));
fjInputs.push_back(p);
}
// define jet clustering sequence
fjClusterSeq = ClusterSequencePtr( new fastjet::ClusterSequence( fjInputs, *fjJetDefinition ) );
// recluster jet constituents and inserted "ghosts"
std::vector<fastjet::PseudoJet> inclusiveJets = fastjet::sorted_by_pt( fjClusterSeq->inclusive_jets(jetPtMin) );
if( useFatJets )
{
if( inclusiveJets.size() < fatJetsHandle->size() )
edm::LogError("TooFewReclusteredJets") << "There are fewer reclustered (" << inclusiveJets.size() << ") than original fat jets (" << fatJetsHandle->size() << "). Please check that the jet algorithm and jet size match those used for the original jet collection.";
// match reclustered and original fat jets
std::vector<int> reclusteredIndices;
matchReclusteredJets<edm::View<reco::Jet> >(fatJetsHandle,inclusiveJets,reclusteredIndices,"fat");
// match groomed and original fat jets
std::vector<int> groomedIndices;
if( useGroomedFatJets )
matchGroomedJets(fatJetsHandle,groomedFatJetsHandle,groomedIndices);
// match subjets and original fat jets
std::vector<std::vector<int> > subjetIndices;
if( useGroomedFatJets )
matchSubjets(groomedIndices,groomedFatJetsHandle,trackIPTagInfos,subjetIndices);
else
matchSubjets(fatJetsHandle,trackIPTagInfos,subjetIndices);
// collect clustered SVs
for(size_t i=0; i<fatJetsHandle->size(); ++i)
{
if( reclusteredIndices.at(i) < 0 ) continue; // continue if matching reclustered to original jets failed
if( fatJetsHandle->at(i).pt() == 0 ) // continue if the original jet has Pt=0
{
edm::LogWarning("NullTransverseMomentum") << "The original fat jet " << i << " has Pt=0. This is not expected so the jet will be skipped.";
continue;
}
if( subjetIndices.at(i).size()==0 ) continue; // continue if the original jet does not have subjets assigned
// since the "ghosts" are extremely soft, the configuration and ordering of the reclustered and original fat jets should in principle stay the same
if( ( std::abs( inclusiveJets.at(reclusteredIndices.at(i)).pt() - fatJetsHandle->at(i).pt() ) / fatJetsHandle->at(i).pt() ) > relPtTolerance )
{
if( fatJetsHandle->at(i).pt() < 10. ) // special handling for low-Pt jets (Pt<10 GeV)
edm::LogWarning("JetPtMismatchAtLowPt") << "The reclustered and original fat jet " << i << " have different Pt's (" << inclusiveJets.at(reclusteredIndices.at(i)).pt() << " vs " << fatJetsHandle->at(i).pt() << " GeV, respectively).\n"
<< "Please check that the jet algorithm and jet size match those used for the original fat jet collection and also make sure the original fat jets are uncorrected. In addition, make sure you are not using CaloJets which are presently not supported.\n"
<< "Since the mismatch is at low Pt, it is ignored and only a warning is issued.\n"
<< "\nIn extremely rare instances the mismatch could be caused by a difference in the machine precision in which case make sure the original jet collection is produced and reclustering is performed in the same job.";
else
edm::LogError("JetPtMismatch") << "The reclustered and original fat jet " << i << " have different Pt's (" << inclusiveJets.at(reclusteredIndices.at(i)).pt() << " vs " << fatJetsHandle->at(i).pt() << " GeV, respectively).\n"
<< "Please check that the jet algorithm and jet size match those used for the original fat jet collection and also make sure the original fat jets are uncorrected. In addition, make sure you are not using CaloJets which are presently not supported.\n"
<< "\nIn extremely rare instances the mismatch could be caused by a difference in the machine precision in which case make sure the original jet collection is produced and reclustering is performed in the same job.";
}
// get jet constituents
std::vector<fastjet::PseudoJet> constituents = inclusiveJets.at(reclusteredIndices.at(i)).constituents();
std::vector<int> svIndices;
// loop over jet constituents and try to find "ghosts"
for(std::vector<fastjet::PseudoJet>::const_iterator it = constituents.begin(); it != constituents.end(); ++it)
{
if( !it->has_user_info() ) continue; // skip if not a "ghost"
svIndices.push_back( it->user_info<VertexInfo>().vertexIndex() );
}
// loop over clustered SVs and assign them to different subjets based on smallest dR
for(size_t sv=0; sv<svIndices.size(); ++sv)
{
const reco::Vertex &pv = *(trackIPTagInfos->front().primaryVertex());
const VTX &extSV = (*extSecVertex)[ svIndices.at(sv) ];
GlobalVector dir = flightDirection(pv, extSV);
dir = dir.unit();
fastjet::PseudoJet p(dir.x(),dir.y(),dir.z(),dir.mag()); // using SV flight direction so treating SV as massless
if( useSVMomentum )
p = fastjet::PseudoJet(extSV.p4().px(),extSV.p4().py(),extSV.p4().pz(),extSV.p4().energy());
std::vector<double> dR2toSubjets;
for(size_t sj=0; sj<subjetIndices.at(i).size(); ++sj)
dR2toSubjets.push_back( Geom::deltaR2( p.rapidity(), p.phi_std(), trackIPTagInfos->at(subjetIndices.at(i).at(sj)).jet()->rapidity(), trackIPTagInfos->at(subjetIndices.at(i).at(sj)).jet()->phi() ) );
// find the closest subjet
int closestSubjetIdx = std::distance( dR2toSubjets.begin(), std::min_element(dR2toSubjets.begin(), dR2toSubjets.end()) );
clusteredSVs.at(subjetIndices.at(i).at(closestSubjetIdx)).push_back( svIndices.at(sv) );
}
}
}
else
{
if( inclusiveJets.size() < trackIPTagInfos->size() )
edm::LogError("TooFewReclusteredJets") << "There are fewer reclustered (" << inclusiveJets.size() << ") than original jets (" << trackIPTagInfos->size() << "). Please check that the jet algorithm and jet size match those used for the original jet collection.";
// match reclustered and original jets
std::vector<int> reclusteredIndices;
matchReclusteredJets<std::vector<IPTI> >(trackIPTagInfos,inclusiveJets,reclusteredIndices);
// collect clustered SVs
for(size_t i=0; i<trackIPTagInfos->size(); ++i)
{
if( reclusteredIndices.at(i) < 0 ) continue; // continue if matching reclustered to original jets failed
if( trackIPTagInfos->at(i).jet()->pt() == 0 ) // continue if the original jet has Pt=0
{
edm::LogWarning("NullTransverseMomentum") << "The original jet " << i << " has Pt=0. This is not expected so the jet will be skipped.";
continue;
}
// since the "ghosts" are extremely soft, the configuration and ordering of the reclustered and original jets should in principle stay the same
if( ( std::abs( inclusiveJets.at(reclusteredIndices.at(i)).pt() - trackIPTagInfos->at(i).jet()->pt() ) / trackIPTagInfos->at(i).jet()->pt() ) > relPtTolerance )
{
if( trackIPTagInfos->at(i).jet()->pt() < 10. ) // special handling for low-Pt jets (Pt<10 GeV)
edm::LogWarning("JetPtMismatchAtLowPt") << "The reclustered and original jet " << i << " have different Pt's (" << inclusiveJets.at(reclusteredIndices.at(i)).pt() << " vs " << trackIPTagInfos->at(i).jet()->pt() << " GeV, respectively).\n"
<< "Please check that the jet algorithm and jet size match those used for the original jet collection and also make sure the original jets are uncorrected. In addition, make sure you are not using CaloJets which are presently not supported.\n"
<< "Since the mismatch is at low Pt, it is ignored and only a warning is issued.\n"
<< "\nIn extremely rare instances the mismatch could be caused by a difference in the machine precision in which case make sure the original jet collection is produced and reclustering is performed in the same job.";
else
edm::LogError("JetPtMismatch") << "The reclustered and original jet " << i << " have different Pt's (" << inclusiveJets.at(reclusteredIndices.at(i)).pt() << " vs " << trackIPTagInfos->at(i).jet()->pt() << " GeV, respectively).\n"
<< "Please check that the jet algorithm and jet size match those used for the original jet collection and also make sure the original jets are uncorrected. In addition, make sure you are not using CaloJets which are presently not supported.\n"
<< "\nIn extremely rare instances the mismatch could be caused by a difference in the machine precision in which case make sure the original jet collection is produced and reclustering is performed in the same job.";
}
// get jet constituents
std::vector<fastjet::PseudoJet> constituents = inclusiveJets.at(reclusteredIndices.at(i)).constituents();
// loop over jet constituents and try to find "ghosts"
for(std::vector<fastjet::PseudoJet>::const_iterator it = constituents.begin(); it != constituents.end(); ++it)
{
if( !it->has_user_info() ) continue; // skip if not a "ghost"
// push back clustered SV indices
clusteredSVs.at(i).push_back( it->user_info<VertexInfo>().vertexIndex() );
}
}
}
}
// case where fat jets are used to associate SVs to subjets but no SV clustering is performed
else if( useExternalSV && !useSVClustering && trackIPTagInfos->size()>0 && useFatJets )
{
// match groomed and original fat jets
std::vector<int> groomedIndices;
if( useGroomedFatJets )
matchGroomedJets(fatJetsHandle,groomedFatJetsHandle,groomedIndices);
// match subjets and original fat jets
std::vector<std::vector<int> > subjetIndices;
if( useGroomedFatJets )
matchSubjets(groomedIndices,groomedFatJetsHandle,trackIPTagInfos,subjetIndices);
else
matchSubjets(fatJetsHandle,trackIPTagInfos,subjetIndices);
// loop over fat jets
for(size_t i=0; i<fatJetsHandle->size(); ++i)
{
if( fatJetsHandle->at(i).pt() == 0 ) // continue if the original jet has Pt=0
{
edm::LogWarning("NullTransverseMomentum") << "The original fat jet " << i << " has Pt=0. This is not expected so the jet will be skipped.";
continue;
}
if( subjetIndices.at(i).size()==0 ) continue; // continue if the original jet does not have subjets assigned
// loop over SVs, associate them to fat jets based on dR cone and
// then assign them to the closets subjet in dR
for(typename edm::View<VTX>::const_iterator it = extSecVertex->begin(); it != extSecVertex->end(); ++it)
{
size_t sv = ( it - extSecVertex->begin() );
const reco::Vertex &pv = *(trackIPTagInfos->front().primaryVertex());
const VTX &extSV = (*extSecVertex)[sv];
GlobalVector dir = flightDirection(pv, extSV);
GlobalVector jetDir(fatJetsHandle->at(i).px(),
fatJetsHandle->at(i).py(),
fatJetsHandle->at(i).pz());
// skip SVs outside the dR cone
if( Geom::deltaR2( dir, jetDir ) > rParam*rParam ) // here using the jet clustering rParam as a dR cut
continue;
dir = dir.unit();
fastjet::PseudoJet p(dir.x(),dir.y(),dir.z(),dir.mag()); // using SV flight direction so treating SV as massless
if( useSVMomentum )
p = fastjet::PseudoJet(extSV.p4().px(),extSV.p4().py(),extSV.p4().pz(),extSV.p4().energy());
std::vector<double> dR2toSubjets;
for(size_t sj=0; sj<subjetIndices.at(i).size(); ++sj)
dR2toSubjets.push_back( Geom::deltaR2( p.rapidity(), p.phi_std(), trackIPTagInfos->at(subjetIndices.at(i).at(sj)).jet()->rapidity(), trackIPTagInfos->at(subjetIndices.at(i).at(sj)).jet()->phi() ) );
// find the closest subjet
int closestSubjetIdx = std::distance( dR2toSubjets.begin(), std::min_element(dR2toSubjets.begin(), dR2toSubjets.end()) );
clusteredSVs.at(subjetIndices.at(i).at(closestSubjetIdx)).push_back(sv);
}
}
}
// ------------------------------------ SV clustering END ----------------------------------------------
std::auto_ptr<ConfigurableVertexReconstructor> vertexReco;
std::auto_ptr<GhostTrackVertexFinder> vertexRecoGT;
if (useGhostTrack)
vertexRecoGT.reset(new GhostTrackVertexFinder(
vtxRecoPSet.getParameter<double>("maxFitChi2"),
vtxRecoPSet.getParameter<double>("mergeThreshold"),
vtxRecoPSet.getParameter<double>("primcut"),
vtxRecoPSet.getParameter<double>("seccut"),
getGhostTrackFitType(vtxRecoPSet.getParameter<std::string>("fitType"))));
else
vertexReco.reset(
new ConfigurableVertexReconstructor(vtxRecoPSet));
TransientTrackMap primariesMap;
// result secondary vertices
auto tagInfos = std::make_unique<Product>();
for(typename std::vector<IPTI>::const_iterator iterJets =
trackIPTagInfos->begin(); iterJets != trackIPTagInfos->end();
++iterJets) {
TrackDataVector trackData;
// std::cout << "Jet " << iterJets-trackIPTagInfos->begin() << std::endl;
const Vertex &pv = *iterJets->primaryVertex();
std::set<TransientTrack> primaries;
if (constraint == CONSTRAINT_PV_PRIMARIES_IN_FIT) {
for(Vertex::trackRef_iterator iter = pv.tracks_begin();
iter != pv.tracks_end(); ++iter) {
TransientTrackMap::iterator pos =
primariesMap.lower_bound(iter->get());
if (pos != primariesMap.end() &&
pos->first == iter->get())
primaries.insert(pos->second);
else {
TransientTrack track =
trackBuilder->build(
iter->castTo<TrackRef>());
primariesMap.insert(pos,
std::make_pair(iter->get(), track));
primaries.insert(track);
}
}
}
edm::RefToBase<Jet> jetRef = iterJets->jet();
GlobalVector jetDir(jetRef->momentum().x(),
jetRef->momentum().y(),
jetRef->momentum().z());
std::vector<std::size_t> indices =
iterJets->sortedIndexes(sortCriterium);
input_container trackRefs = iterJets->sortedTracks(indices);
const std::vector<reco::btag::TrackIPData> &ipData =
iterJets->impactParameterData();
// build transient tracks used for vertex reconstruction
std::vector<TransientTrack> fitTracks;
std::vector<GhostTrackState> gtStates;
std::auto_ptr<GhostTrackPrediction> gtPred;
if (useGhostTrack)
gtPred.reset(new GhostTrackPrediction(
*iterJets->ghostTrack()));
for(unsigned int i = 0; i < indices.size(); i++) {
typedef typename TemplatedSecondaryVertexTagInfo<IPTI,VTX>::IndexedTrackData IndexedTrackData;
const input_item &trackRef = trackRefs[i];
trackData.push_back(IndexedTrackData());
trackData.back().first = indices[i];
// select tracks for SV finder
if (!trackSelector(*reco::btag::toTrack(trackRef), ipData[indices[i]], *jetRef,
RecoVertex::convertPos(
pv.position()))) {
trackData.back().second.svStatus =
TemplatedSecondaryVertexTagInfo<IPTI,VTX>::TrackData::trackSelected;
continue;
}
TransientTrackMap::const_iterator pos =
primariesMap.find(reco::btag::toTrack((trackRef)));
TransientTrack fitTrack;
if (pos != primariesMap.end()) {
primaries.erase(pos->second);
fitTrack = pos->second;
} else
fitTrack = trackBuilder->build(trackRef);
fitTracks.push_back(fitTrack);
trackData.back().second.svStatus =
TemplatedSecondaryVertexTagInfo<IPTI,VTX>::TrackData::trackUsedForVertexFit;
if (useGhostTrack) {
GhostTrackState gtState(fitTrack);
GlobalPoint pos =
ipData[indices[i]].closestToGhostTrack;
gtState.linearize(*gtPred, true,
gtPred->lambda(pos));
gtState.setWeight(ipData[indices[i]].ghostTrackWeight);
gtStates.push_back(gtState);
}
}
std::auto_ptr<GhostTrack> ghostTrack;
if (useGhostTrack)
ghostTrack.reset(new GhostTrack(
GhostTrackPrediction(
RecoVertex::convertPos(pv.position()),
RecoVertex::convertError(pv.error()),
GlobalVector(
iterJets->ghostTrack()->px(),
iterJets->ghostTrack()->py(),
iterJets->ghostTrack()->pz()),
0.05),
*gtPred, gtStates,
iterJets->ghostTrack()->chi2(),
iterJets->ghostTrack()->ndof()));
// perform actual vertex finding
std::vector<VTX> extAssoCollection;
std::vector<TransientVertex> fittedSVs;
std::vector<SecondaryVertex> SVs;
if(!useExternalSV){
switch(constraint) {
case CONSTRAINT_NONE:
if (useGhostTrack)
fittedSVs = vertexRecoGT->vertices(
pv, *ghostTrack);
else
fittedSVs = vertexReco->vertices(fitTracks);
break;
case CONSTRAINT_BEAMSPOT:
if (useGhostTrack)
fittedSVs = vertexRecoGT->vertices(
pv, *beamSpot, *ghostTrack);
else
fittedSVs = vertexReco->vertices(fitTracks,
*beamSpot);
break;
case CONSTRAINT_PV_BEAMSPOT_SIZE:
case CONSTRAINT_PV_BS_Z_ERRORS_SCALED:
case CONSTRAINT_PV_ERROR_SCALED: {
BeamSpot::CovarianceMatrix cov;
for(unsigned int i = 0; i < 7; i++) {
unsigned int covSrc = bsCovSrc[i];
for(unsigned int j = 0; j < 7; j++) {
double v=0.0;
if (!covSrc || bsCovSrc[j] != covSrc)
v = 0.0;
else if (covSrc == 1)
v = beamSpot->covariance(i, j);
else if (j<3 && i<3)
v = pv.covariance(i, j) *
constraintScaling;
cov(i, j) = v;
}
}
BeamSpot bs(pv.position(), sigmaZ,
beamSpot.isValid() ? beamSpot->dxdz() : 0.,
beamSpot.isValid() ? beamSpot->dydz() : 0.,
beamWidth, cov, BeamSpot::Unknown);
if (useGhostTrack)
fittedSVs = vertexRecoGT->vertices(
pv, bs, *ghostTrack);
else
fittedSVs = vertexReco->vertices(fitTracks, bs);
} break;
case CONSTRAINT_PV_PRIMARIES_IN_FIT: {
std::vector<TransientTrack> primaries_(
primaries.begin(), primaries.end());
if (useGhostTrack)
fittedSVs = vertexRecoGT->vertices(
pv, *beamSpot, primaries_,
*ghostTrack);
else
fittedSVs = vertexReco->vertices(
primaries_, fitTracks,
*beamSpot);
} break;
}
// build combined SV information and filter
SVBuilder svBuilder(pv, jetDir, withPVError, minTrackWeight);
std::remove_copy_if(boost::make_transform_iterator(
fittedSVs.begin(), svBuilder),
boost::make_transform_iterator(
fittedSVs.end(), svBuilder),
std::back_inserter(SVs),
SVFilter(vertexFilter, pv, jetDir));
}else{
if( useSVClustering || useFatJets ) {
size_t jetIdx = ( iterJets - trackIPTagInfos->begin() );
for(size_t iExtSv = 0; iExtSv < clusteredSVs.at(jetIdx).size(); iExtSv++){
const VTX & extVertex = (*extSecVertex)[ clusteredSVs.at(jetIdx).at(iExtSv) ];
if( extVertex.p4().M() < 0.3 )
continue;
extAssoCollection.push_back( extVertex );
}
}
else {
for(size_t iExtSv = 0; iExtSv < extSecVertex->size(); iExtSv++){
const VTX & extVertex = (*extSecVertex)[iExtSv];
if( Geom::deltaR2( ( position(extVertex) - pv.position() ), (extSVDeltaRToJet > 0) ? jetDir : -jetDir ) > extSVDeltaRToJet*extSVDeltaRToJet || extVertex.p4().M() < 0.3 )
continue;
extAssoCollection.push_back( extVertex );
}
}
// build combined SV information and filter
SVBuilder svBuilder(pv, jetDir, withPVError, minTrackWeight);
std::remove_copy_if(boost::make_transform_iterator( extAssoCollection.begin(), svBuilder),
boost::make_transform_iterator(extAssoCollection.end(), svBuilder),
std::back_inserter(SVs),
SVFilter(vertexFilter, pv, jetDir));
}
// clean up now unneeded collections
gtPred.reset();
ghostTrack.reset();
gtStates.clear();
fitTracks.clear();
fittedSVs.clear();
extAssoCollection.clear();
// sort SVs by importance
std::vector<unsigned int> vtxIndices = vertexSorting(SVs);
std::vector<typename TemplatedSecondaryVertexTagInfo<IPTI,VTX>::VertexData> svData;
svData.resize(vtxIndices.size());
for(unsigned int idx = 0; idx < vtxIndices.size(); idx++) {
const SecondaryVertex &sv = SVs[vtxIndices[idx]];
svData[idx].vertex = sv;
svData[idx].dist1d = sv.dist1d();
svData[idx].dist2d = sv.dist2d();
svData[idx].dist3d = sv.dist3d();
svData[idx].direction = flightDirection(pv,sv);
// mark tracks successfully used in vertex fit
markUsedTracks(trackData,trackRefs,sv,idx);
}
// fill result into tag infos
tagInfos->push_back(
TemplatedSecondaryVertexTagInfo<IPTI,VTX>(
trackData, svData, SVs.size(),
edm::Ref<std::vector<IPTI> >(trackIPTagInfos,
iterJets - trackIPTagInfos->begin())));
}
event.put(std::move(tagInfos));
}
//Need specialized template because reco::Vertex iterators are TrackBase and it is a mess to make general
template <>
void TemplatedSecondaryVertexProducer<TrackIPTagInfo,reco::Vertex>::markUsedTracks(TrackDataVector & trackData, const input_container & trackRefs, const SecondaryVertex & sv,size_t idx)
{
for(Vertex::trackRef_iterator iter = sv.tracks_begin(); iter != sv.tracks_end(); ++iter) {
if (sv.trackWeight(*iter) < minTrackWeight)
continue;
typename input_container::const_iterator pos =
std::find(trackRefs.begin(), trackRefs.end(),
iter->castTo<input_item>());
if (pos == trackRefs.end() ) {
if(!useExternalSV)
throw cms::Exception("TrackNotFound")
<< "Could not find track from secondary "
"vertex in original tracks."
<< std::endl;
} else {
unsigned int index = pos - trackRefs.begin();
trackData[index].second.svStatus =
(btag::TrackData::Status)
((unsigned int)btag::TrackData::trackAssociatedToVertex + idx);
}
}
}
template <>
void TemplatedSecondaryVertexProducer<CandIPTagInfo,reco::VertexCompositePtrCandidate>::markUsedTracks(TrackDataVector & trackData, const input_container & trackRefs, const SecondaryVertex & sv,size_t idx)
{
for(typename input_container::const_iterator iter = sv.daughterPtrVector().begin(); iter != sv.daughterPtrVector().end(); ++iter)
{
typename input_container::const_iterator pos =
std::find(trackRefs.begin(), trackRefs.end(), *iter);
if (pos != trackRefs.end() )
{
unsigned int index = pos - trackRefs.begin();
trackData[index].second.svStatus =
(btag::TrackData::Status)
((unsigned int)btag::TrackData::trackAssociatedToVertex + idx);
}
}
}
template <>
typename TemplatedSecondaryVertexProducer<TrackIPTagInfo,reco::Vertex>::SecondaryVertex
TemplatedSecondaryVertexProducer<TrackIPTagInfo,reco::Vertex>::SVBuilder::operator () (const TransientVertex &sv) const
{
if(sv.originalTracks().size()>0 && sv.originalTracks()[0].trackBaseRef().isNonnull())
return SecondaryVertex(pv, sv, direction, withPVError);
else
{
edm::LogError("UnexpectedInputs") << "Building from Candidates, should not happen!";
return SecondaryVertex(pv, sv, direction, withPVError);
}
}
template <>
typename TemplatedSecondaryVertexProducer<CandIPTagInfo,reco::VertexCompositePtrCandidate>::SecondaryVertex
TemplatedSecondaryVertexProducer<CandIPTagInfo,reco::VertexCompositePtrCandidate>::SVBuilder::operator () (const TransientVertex &sv) const
{
if(sv.originalTracks().size()>0 && sv.originalTracks()[0].trackBaseRef().isNonnull())
{
edm::LogError("UnexpectedInputs") << "Building from Tracks, should not happen!";
VertexCompositePtrCandidate vtxCompPtrCand;
vtxCompPtrCand.setCovariance(sv.vertexState().error().matrix());
vtxCompPtrCand.setChi2AndNdof(sv.totalChiSquared(), sv.degreesOfFreedom());
vtxCompPtrCand.setVertex(Candidate::Point(sv.position().x(),sv.position().y(),sv.position().z()));
return SecondaryVertex(pv, vtxCompPtrCand, direction, withPVError);
}
else
{
VertexCompositePtrCandidate vtxCompPtrCand;
vtxCompPtrCand.setCovariance(sv.vertexState().error().matrix());
vtxCompPtrCand.setChi2AndNdof(sv.totalChiSquared(), sv.degreesOfFreedom());
vtxCompPtrCand.setVertex(Candidate::Point(sv.position().x(),sv.position().y(),sv.position().z()));
Candidate::LorentzVector p4;
for(std::vector<reco::TransientTrack>::const_iterator tt = sv.originalTracks().begin(); tt != sv.originalTracks().end(); ++tt)
{
if (sv.trackWeight(*tt) < minTrackWeight)
continue;