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#include "CommonTools/RecoAlgos/interface/TrackWithVertexSelector.h"
#include "FWCore/Utilities/interface/isFinite.h"
//
// constructors and destructor
//
namespace {
constexpr float fakeBeamSpotTimeWidth = 0.175f;
}
TrackWithVertexSelector::TrackWithVertexSelector(const edm::ParameterSet &iConfig, edm::ConsumesCollector &iC)
: numberOfValidHits_(iConfig.getParameter<uint32_t>("numberOfValidHits")),
numberOfValidPixelHits_(iConfig.getParameter<uint32_t>("numberOfValidPixelHits")),
numberOfLostHits_(iConfig.getParameter<uint32_t>("numberOfLostHits")),
normalizedChi2_(iConfig.getParameter<double>("normalizedChi2")),
ptMin_(iConfig.getParameter<double>("ptMin")),
ptMax_(iConfig.getParameter<double>("ptMax")),
etaMin_(iConfig.getParameter<double>("etaMin")),
etaMax_(iConfig.getParameter<double>("etaMax")),
dzMax_(iConfig.getParameter<double>("dzMax")),
d0Max_(iConfig.getParameter<double>("d0Max")),
ptErrorCut_(iConfig.getParameter<double>("ptErrorCut")),
quality_(iConfig.getParameter<std::string>("quality")),
nVertices_(iConfig.getParameter<bool>("useVtx") ? iConfig.getParameter<uint32_t>("nVertices") : 0),
vertexToken_(iC.consumes<reco::VertexCollection>(iConfig.getParameter<edm::InputTag>("vertexTag"))),
timesToken_(iC.consumes<edm::ValueMap<float> >(iConfig.getParameter<edm::InputTag>("timesTag"))),
timeResosToken_(iC.consumes<edm::ValueMap<float> >(iConfig.getParameter<edm::InputTag>("timeResosTag"))),
vtxFallback_(iConfig.getParameter<bool>("vtxFallback")),
zetaVtx_(iConfig.getParameter<double>("zetaVtx")),
rhoVtx_(iConfig.getParameter<double>("rhoVtx")),
nSigmaDtVertex_(iConfig.getParameter<double>("nSigmaDtVertex")) {}
TrackWithVertexSelector::~TrackWithVertexSelector() {}
void TrackWithVertexSelector::init(const edm::Event &event) {
edm::Handle<reco::VertexCollection> hVtx;
event.getByToken(vertexToken_, hVtx);
vcoll_ = nVertices_ > 0 ? hVtx.product() : nullptr;
edm::Handle<edm::ValueMap<float> > hTimes;
event.getByToken(timesToken_, hTimes);
timescoll_ = hTimes.isValid() ? hTimes.product() : nullptr;
edm::Handle<edm::ValueMap<float> > hTimeResos;
event.getByToken(timeResosToken_, hTimeResos);
timeresoscoll_ = hTimeResos.isValid() ? hTimeResos.product() : nullptr;
}
bool TrackWithVertexSelector::testTrack(const reco::Track &t) const {
using std::abs;
if ((t.numberOfValidHits() >= numberOfValidHits_) &&
(static_cast<unsigned int>(t.hitPattern().numberOfValidPixelHits()) >= numberOfValidPixelHits_) &&
(t.numberOfLostHits() <= numberOfLostHits_) && (t.normalizedChi2() <= normalizedChi2_) &&
(t.ptError() / t.pt() * std::max(1., t.normalizedChi2()) <= ptErrorCut_) &&
(t.quality(t.qualityByName(quality_))) && (t.pt() >= ptMin_) && (t.pt() <= ptMax_) && (abs(t.eta()) <= etaMax_) &&
(abs(t.eta()) >= etaMin_) && (abs(t.dz()) <= dzMax_) && (abs(t.d0()) <= d0Max_)) {
return true;
}
return false;
}
bool TrackWithVertexSelector::testTrack(const reco::TrackRef &tref) const { return testTrack(*tref); }
bool TrackWithVertexSelector::testVertices(const reco::Track &t, const reco::VertexCollection &vtxs) const {
bool ok = false;
if (!vtxs.empty()) {
unsigned int tested = 1;
for (reco::VertexCollection::const_iterator it = vtxs.begin(), ed = vtxs.end(); it != ed; ++it) {
if ((std::abs(t.dxy(it->position())) < rhoVtx_) && (std::abs(t.dz(it->position())) < zetaVtx_)) {
ok = true;
break;
}
if (tested++ >= nVertices_)
break;
}
} else if (vtxFallback_) {
return ((std::abs(t.vertex().z()) < 15.9) && (t.vertex().Rho() < 0.2));
}
return ok;
}
bool TrackWithVertexSelector::testVertices(const reco::TrackRef &tref, const reco::VertexCollection &vtxs) const {
const auto &t = *tref;
const bool timeAvailable = timescoll_ != nullptr && timeresoscoll_ != nullptr;
bool ok = false;
if (!vtxs.empty()) {
unsigned int tested = 1;
for (reco::VertexCollection::const_iterator it = vtxs.begin(), ed = vtxs.end(); it != ed; ++it) {
const bool useTime = timeAvailable && it->t() != 0.;
float time = useTime ? (*timescoll_)[tref] : -1.f;
float timeReso = useTime ? (*timeresoscoll_)[tref] : -1.f;
timeReso = (timeReso > 1e-6 ? timeReso : fakeBeamSpotTimeWidth);
if (edm::isNotFinite(time)) {
time = 0.0;
timeReso = 2.0 * fakeBeamSpotTimeWidth;
}
const double vtxSigmaT2 = it->tError() * it->tError();
const double vtxTrackErr = std::sqrt(vtxSigmaT2 + timeReso * timeReso);
if ((std::abs(t.dxy(it->position())) < rhoVtx_) && (std::abs(t.dz(it->position())) < zetaVtx_) &&
(!useTime || (std::abs(time - it->t()) / vtxTrackErr < nSigmaDtVertex_))) {
ok = true;
break;
}
if (tested++ >= nVertices_)
break;
}
} else if (vtxFallback_) {
return ((std::abs(t.vertex().z()) < 15.9) && (t.vertex().Rho() < 0.2));
}
return ok;
}
bool TrackWithVertexSelector::operator()(const reco::Track &t) const {
if (!testTrack(t))
return false;
if (nVertices_ == 0)
return true;
return testVertices(t, *vcoll_);
}
bool TrackWithVertexSelector::operator()(const reco::TrackRef &tref) const {
if (!testTrack(tref))
return false;
if (nVertices_ == 0)
return true;
return testVertices(tref, *vcoll_);
}
void TrackWithVertexSelector::fillPSetDescription(edm::ParameterSetDescription &desc) {
desc.add<uint32_t>("numberOfValidHits", 0);
desc.add<uint32_t>("numberOfValidPixelHits", 0);
desc.add<uint32_t>("numberOfLostHits", 999)->setComment("at most 999 lost hits");
desc.add<double>("normalizedChi2", 999999.);
desc.add<double>("ptMin", 0.3)->setComment("in GeV");
desc.add<double>("ptMax", 500.0)->setComment("in GeV");
desc.add<double>("etaMin", 0.0);
desc.add<double>("etaMax", 50.0);
desc.add<double>("dzMax", 999.)->setComment("in cm");
desc.add<double>("d0Max", 999.)->setComment("in cm");
desc.add<double>("ptErrorCut", 0.2)->setComment("[pTError/pT]*max(1,normChi2) <= ptErrorCut");
desc.add<std::string>("quality", "highPurity")->setComment(" quality cut as defined in reco::TrackBase");
desc.add<bool>("useVtx", true)->setComment("compatibility with a vertex");
desc.add<uint32_t>("nVertices", 0)->setComment(" how many vertices to look at before dropping the track");
desc.add<edm::InputTag>("vertexTag", edm::InputTag("offlinePrimaryVertices"));
desc.add<edm::InputTag>("timesTag", edm::InputTag(""));
desc.add<edm::InputTag>("timeResosTag", edm::InputTag(""));
desc.add<bool>("vtxFallback", true)->setComment("falback to beam spot if there are no vertices");
desc.add<double>("zetaVtx", 1.0);
desc.add<double>("rhoVtx", 0.2)->setComment("tags used by b-tagging folks");
desc.add<double>("nSigmaDtVertex", 0);
}
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