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TrackAndGSFLinker.cc
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TrackAndGSFLinker.cc
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#include "RecoParticleFlow/PFProducer/interface/BlockElementLinkerBase.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecTrack.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementGsfTrack.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementTrack.h"
#include "RecoParticleFlow/PFClusterTools/interface/LinkByRecHit.h"
class TrackAndGSFLinker : public BlockElementLinkerBase {
public:
TrackAndGSFLinker(const edm::ParameterSet& conf)
: BlockElementLinkerBase(conf),
useKDTree_(conf.getParameter<bool>("useKDTree")),
useConvertedBrems_(conf.getParameter<bool>("useConvertedBrems")),
debug_(conf.getUntrackedParameter<bool>("debug", false)) {}
double testLink(const reco::PFBlockElement*, const reco::PFBlockElement*) const override;
private:
bool useKDTree_, useConvertedBrems_, debug_;
};
DEFINE_EDM_PLUGIN(BlockElementLinkerFactory, TrackAndGSFLinker, "TrackAndGSFLinker");
double TrackAndGSFLinker::testLink(const reco::PFBlockElement* elem1, const reco::PFBlockElement* elem2) const {
constexpr reco::PFBlockElement::TrackType T_FROM_GAMMACONV = reco::PFBlockElement::T_FROM_GAMMACONV;
double dist = -1.0;
const reco::PFBlockElementGsfTrack* gsfelem(nullptr);
const reco::PFBlockElementTrack* tkelem(nullptr);
if (elem1->type() < elem2->type()) {
tkelem = static_cast<const reco::PFBlockElementTrack*>(elem1);
gsfelem = static_cast<const reco::PFBlockElementGsfTrack*>(elem2);
} else {
tkelem = static_cast<const reco::PFBlockElementTrack*>(elem2);
gsfelem = static_cast<const reco::PFBlockElementGsfTrack*>(elem1);
}
const reco::PFRecTrackRef& trackref = tkelem->trackRefPF();
const reco::GsfPFRecTrackRef& gsfref = gsfelem->GsftrackRefPF();
const reco::TrackRef& kftrackref = trackref->trackRef();
const reco::TrackBaseRef kftrackrefbase(kftrackref);
const reco::PFRecTrackRef& refkf = gsfref->kfPFRecTrackRef();
if (refkf.isNonnull()) {
const reco::TrackRef& gsftrackref = refkf->trackRef();
if (gsftrackref.isNonnull() && kftrackref.isNonnull() && kftrackref == gsftrackref) {
dist = 0.001;
}
}
//override for converted brems
if (useConvertedBrems_) {
if (tkelem->isLinkedToDisplacedVertex()) {
const std::vector<reco::PFRecTrackRef>& convbrems = gsfref->convBremPFRecTrackRef();
for (const auto& convbrem : convbrems) {
if (tkelem->trackType(T_FROM_GAMMACONV) && kftrackref == convbrem->trackRef()) {
dist = 0.001;
} else { // check the base ref as well (for dedicated conversions?)
const reco::TrackBaseRef convbrembase(convbrem->trackRef());
if (convbrembase == kftrackrefbase) {
dist = 0.001;
}
}
}
}
}
return dist;
}