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TrackExtenderWithMTD.cc
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TrackExtenderWithMTD.cc
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#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/stream/EDProducer.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/Framework/interface/ConsumesCollector.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "RecoMTD/DetLayers/interface/MTDDetLayerGeometry.h"
#include "RecoMTD/Records/interface/MTDRecoGeometryRecord.h"
#include "MagneticField/Engine/interface/MagneticField.h"
#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"
#include "TrackingTools/KalmanUpdators/interface/Chi2MeasurementEstimator.h"
#include "DataFormats/TrackerRecHit2D/interface/MTDTrackingRecHit.h"
#include "RecoMTD/DetLayers/interface/MTDTrayBarrelLayer.h"
#include "TrackingTools/DetLayers/interface/ForwardDetLayer.h"
#include "DataFormats/ForwardDetId/interface/BTLDetId.h"
#include "DataFormats/ForwardDetId/interface/ETLDetId.h"
#include "DataFormats/ForwardDetId/interface/MTDChannelIdentifier.h"
#include "Geometry/CommonTopologies/interface/PixelTopology.h"
#include "TrackingTools/PatternTools/interface/Trajectory.h"
#include "TrackingTools/PatternTools/interface/TrajTrackAssociation.h"
#include "TrackingTools/TransientTrack/interface/TransientTrack.h"
#include "TrackingTools/TransientTrack/interface/TransientTrackBuilder.h"
#include "TrackingTools/Records/interface/TransientTrackRecord.h"
#include "TrackingTools/TransientTrackingRecHit/interface/TransientTrackingRecHit.h"
#include "RecoMTD/TransientTrackingRecHit/interface/MTDTransientTrackingRecHitBuilder.h"
#include "TrackingTools/Records/interface/TransientRecHitRecord.h"
#include "TrackingTools/Records/interface/TrackingComponentsRecord.h"
#include "TrackingTools/GeomPropagators/interface/Propagator.h"
#include "TrackingTools/PatternTools/interface/TSCBLBuilderWithPropagator.h"
#include "RecoTracker/TransientTrackingRecHit/interface/Traj2TrackHits.h"
#include "TrackingTools/TrackRefitter/interface/TrackTransformer.h"
#include <sstream>
#include "Geometry/CommonTopologies/interface/Topology.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"
#include "DataFormats/Math/interface/GeantUnits.h"
#include "DataFormats/Math/interface/LorentzVector.h"
#include "CLHEP/Units/GlobalPhysicalConstants.h"
#include "DataFormats/Math/interface/Rounding.h"
#include "DataFormats/VertexReco/interface/VertexFwd.h"
#include "DataFormats/VertexReco/interface/Vertex.h"
using namespace std;
using namespace edm;
using namespace reco;
namespace {
constexpr float c_cm_ns = geant_units::operators::convertMmToCm(CLHEP::c_light); // [mm/ns] -> [cm/ns]
constexpr float c_inv = 1.0f / c_cm_ns;
class MTDHitMatchingInfo {
public:
MTDHitMatchingInfo() {
hit = nullptr;
estChi2 = std::numeric_limits<float>::max();
timeChi2 = std::numeric_limits<float>::max();
}
//Operator used to sort the hits while performing the matching step at the MTD
inline bool operator<(const MTDHitMatchingInfo& m2) const {
//only for good matching in time use estChi2, otherwise use mostly time compatibility
constexpr float chi2_cut = 10.f;
constexpr float low_weight = 3.f;
constexpr float high_weight = 8.f;
if (timeChi2 < chi2_cut && m2.timeChi2 < chi2_cut)
return chi2(low_weight) < m2.chi2(low_weight);
else
return chi2(high_weight) < m2.chi2(high_weight);
}
inline float chi2(float timeWeight = 1.f) const { return estChi2 + timeWeight * timeChi2; }
const MTDTrackingRecHit* hit;
float estChi2;
float timeChi2;
};
class TrackSegments {
public:
TrackSegments() {
sigmaTofs_.reserve(30); // observed upper limit on nSegments
};
inline uint32_t addSegment(float tPath, float tMom2, float sigmaMom) {
segmentPathOvc_.emplace_back(tPath * c_inv);
segmentMom2_.emplace_back(tMom2);
segmentSigmaMom_.emplace_back(sigmaMom);
nSegment_++;
LogTrace("TrackExtenderWithMTD") << "addSegment # " << nSegment_ << " s = " << tPath
<< " p = " << std::sqrt(tMom2) << " sigma_p = " << sigmaMom
<< " sigma_p/p = " << sigmaMom / std::sqrt(tMom2) * 100 << " %";
return nSegment_;
}
inline float computeTof(float mass_inv2) const {
float tof(0.f);
for (uint32_t iSeg = 0; iSeg < nSegment_; iSeg++) {
float gammasq = 1.f + segmentMom2_[iSeg] * mass_inv2;
float beta = std::sqrt(1.f - 1.f / gammasq);
tof += segmentPathOvc_[iSeg] / beta;
LogTrace("TrackExtenderWithMTD") << " TOF Segment # " << iSeg + 1 << " p = " << std::sqrt(segmentMom2_[iSeg])
<< " tof = " << tof;
#ifdef EDM_ML_DEBUG
float sigma_tof = segmentPathOvc_[iSeg] * segmentSigmaMom_[iSeg] /
(segmentMom2_[iSeg] * sqrt(segmentMom2_[iSeg] + 1 / mass_inv2) * mass_inv2);
LogTrace("TrackExtenderWithMTD") << "TOF Segment # " << iSeg + 1 << std::fixed << std::setw(6)
<< " tof segment = " << segmentPathOvc_[iSeg] / beta << std::scientific
<< "+/- " << sigma_tof << std::fixed
<< "(rel. err. = " << sigma_tof / (segmentPathOvc_[iSeg] / beta) * 100
<< " %)";
#endif
}
return tof;
}
inline float computeSigmaTof(float mass_inv2) {
float sigmatof = 0.;
// remove previously calculated sigmaTofs
sigmaTofs_.clear();
// compute sigma(tof) on each segment first by propagating sigma(p)
// also add diagonal terms to sigmatof
float sigma = 0.;
for (uint32_t iSeg = 0; iSeg < nSegment_; iSeg++) {
sigma = segmentPathOvc_[iSeg] * segmentSigmaMom_[iSeg] /
(segmentMom2_[iSeg] * sqrt(segmentMom2_[iSeg] + 1 / mass_inv2) * mass_inv2);
sigmaTofs_.push_back(sigma);
sigmatof += sigma * sigma;
}
// compute sigma on sum of tofs assuming full correlation between segments
for (uint32_t iSeg = 0; iSeg < nSegment_; iSeg++) {
for (uint32_t jSeg = iSeg + 1; jSeg < nSegment_; jSeg++) {
sigmatof += 2 * sigmaTofs_[iSeg] * sigmaTofs_[jSeg];
}
}
return sqrt(sigmatof);
}
inline uint32_t size() const { return nSegment_; }
inline uint32_t removeFirstSegment() {
if (nSegment_ > 0) {
segmentPathOvc_.erase(segmentPathOvc_.begin());
segmentMom2_.erase(segmentMom2_.begin());
nSegment_--;
}
return nSegment_;
}
inline std::pair<float, float> getSegmentPathAndMom2(uint32_t iSegment) const {
if (iSegment >= nSegment_) {
throw cms::Exception("TrackExtenderWithMTD") << "Requesting non existing track segment #" << iSegment;
}
return std::make_pair(segmentPathOvc_[iSegment], segmentMom2_[iSegment]);
}
uint32_t nSegment_ = 0;
std::vector<float> segmentPathOvc_;
std::vector<float> segmentMom2_;
std::vector<float> segmentSigmaMom_;
std::vector<float> sigmaTofs_;
};
struct TrackTofPidInfo {
float tmtd;
float tmtderror;
float pathlength;
float betaerror;
float dt;
float dterror;
float dtchi2;
float dt_best;
float dterror_best;
float dtchi2_best;
float gammasq_pi;
float beta_pi;
float dt_pi;
float sigma_dt_pi;
float gammasq_k;
float beta_k;
float dt_k;
float sigma_dt_k;
float gammasq_p;
float beta_p;
float dt_p;
float sigma_dt_p;
float prob_pi;
float prob_k;
float prob_p;
};
enum class TofCalc { kCost = 1, kSegm = 2, kMixd = 3 };
enum class SigmaTofCalc { kCost = 1, kSegm = 2 };
const TrackTofPidInfo computeTrackTofPidInfo(float magp2,
float length,
TrackSegments trs,
float t_mtd,
float t_mtderr,
float t_vtx,
float t_vtx_err,
bool addPIDError = true,
TofCalc choice = TofCalc::kCost,
SigmaTofCalc sigma_choice = SigmaTofCalc::kCost) {
constexpr float m_pi = 0.13957018f;
constexpr float m_pi_inv2 = 1.0f / m_pi / m_pi;
constexpr float m_k = 0.493677f;
constexpr float m_k_inv2 = 1.0f / m_k / m_k;
constexpr float m_p = 0.9382720813f;
constexpr float m_p_inv2 = 1.0f / m_p / m_p;
TrackTofPidInfo tofpid;
tofpid.tmtd = t_mtd;
tofpid.tmtderror = t_mtderr;
tofpid.pathlength = length;
auto deltat = [&](const float mass_inv2, const float betatmp) {
float res(1.f);
switch (choice) {
case TofCalc::kCost:
res = tofpid.pathlength / betatmp * c_inv;
break;
case TofCalc::kSegm:
res = trs.computeTof(mass_inv2);
break;
case TofCalc::kMixd:
res = trs.computeTof(mass_inv2) + tofpid.pathlength / betatmp * c_inv;
break;
}
return res;
};
auto sigmadeltat = [&](const float mass_inv2) {
float res(1.f);
switch (sigma_choice) {
case SigmaTofCalc::kCost:
// sigma(t) = sigma(p) * |dt/dp| = sigma(p) * DeltaL/c * m^2 / (p^2 * E)
res = tofpid.pathlength * c_inv * trs.segmentSigmaMom_[trs.nSegment_ - 1] /
(magp2 * sqrt(magp2 + 1 / mass_inv2) * mass_inv2);
break;
case SigmaTofCalc::kSegm:
res = trs.computeSigmaTof(mass_inv2);
break;
}
return res;
};
tofpid.gammasq_pi = 1.f + magp2 * m_pi_inv2;
tofpid.beta_pi = std::sqrt(1.f - 1.f / tofpid.gammasq_pi);
tofpid.dt_pi = deltat(m_pi_inv2, tofpid.beta_pi);
tofpid.sigma_dt_pi = sigmadeltat(m_pi_inv2);
tofpid.gammasq_k = 1.f + magp2 * m_k_inv2;
tofpid.beta_k = std::sqrt(1.f - 1.f / tofpid.gammasq_k);
tofpid.dt_k = deltat(m_k_inv2, tofpid.beta_k);
tofpid.sigma_dt_k = sigmadeltat(m_k_inv2);
tofpid.gammasq_p = 1.f + magp2 * m_p_inv2;
tofpid.beta_p = std::sqrt(1.f - 1.f / tofpid.gammasq_p);
tofpid.dt_p = deltat(m_p_inv2, tofpid.beta_p);
tofpid.sigma_dt_p = sigmadeltat(m_p_inv2);
tofpid.dt = tofpid.tmtd - tofpid.dt_pi - t_vtx; //assume by default the pi hypothesis
tofpid.dterror = sqrt(tofpid.tmtderror * tofpid.tmtderror + t_vtx_err * t_vtx_err);
tofpid.betaerror = 0.f;
if (addPIDError) {
tofpid.dterror =
sqrt(tofpid.dterror * tofpid.dterror + (tofpid.dt_p - tofpid.dt_pi) * (tofpid.dt_p - tofpid.dt_pi));
tofpid.betaerror = tofpid.beta_p - tofpid.beta_pi;
}
tofpid.dtchi2 = (tofpid.dt * tofpid.dt) / (tofpid.dterror * tofpid.dterror);
tofpid.dt_best = tofpid.dt;
tofpid.dterror_best = tofpid.dterror;
tofpid.dtchi2_best = tofpid.dtchi2;
tofpid.prob_pi = -1.f;
tofpid.prob_k = -1.f;
tofpid.prob_p = -1.f;
if (!addPIDError) {
//*TODO* deal with heavier nucleons and/or BSM case here?
float chi2_pi = tofpid.dtchi2;
float chi2_k =
(tofpid.tmtd - tofpid.dt_k - t_vtx) * (tofpid.tmtd - tofpid.dt_k - t_vtx) / (tofpid.dterror * tofpid.dterror);
float chi2_p =
(tofpid.tmtd - tofpid.dt_p - t_vtx) * (tofpid.tmtd - tofpid.dt_p - t_vtx) / (tofpid.dterror * tofpid.dterror);
float rawprob_pi = exp(-0.5f * chi2_pi);
float rawprob_k = exp(-0.5f * chi2_k);
float rawprob_p = exp(-0.5f * chi2_p);
float normprob = 1.f / (rawprob_pi + rawprob_k + rawprob_p);
tofpid.prob_pi = rawprob_pi * normprob;
tofpid.prob_k = rawprob_k * normprob;
tofpid.prob_p = rawprob_p * normprob;
float prob_heavy = 1.f - tofpid.prob_pi;
constexpr float heavy_threshold = 0.75f;
if (prob_heavy > heavy_threshold) {
if (chi2_k < chi2_p) {
tofpid.dt_best = (tofpid.tmtd - tofpid.dt_k - t_vtx);
tofpid.dtchi2_best = chi2_k;
} else {
tofpid.dt_best = (tofpid.tmtd - tofpid.dt_p - t_vtx);
tofpid.dtchi2_best = chi2_p;
}
}
}
return tofpid;
}
bool getTrajectoryStateClosestToBeamLine(const Trajectory& traj,
const reco::BeamSpot& bs,
const Propagator* thePropagator,
TrajectoryStateClosestToBeamLine& tscbl) {
// get the state closest to the beamline
TrajectoryStateOnSurface stateForProjectionToBeamLineOnSurface =
traj.closestMeasurement(GlobalPoint(bs.x0(), bs.y0(), bs.z0())).updatedState();
if (!stateForProjectionToBeamLineOnSurface.isValid()) {
edm::LogError("CannotPropagateToBeamLine") << "the state on the closest measurement isnot valid. skipping track.";
return false;
}
const FreeTrajectoryState& stateForProjectionToBeamLine = *stateForProjectionToBeamLineOnSurface.freeState();
TSCBLBuilderWithPropagator tscblBuilder(*thePropagator);
tscbl = tscblBuilder(stateForProjectionToBeamLine, bs);
return tscbl.isValid();
}
bool trackPathLength(const Trajectory& traj,
const TrajectoryStateClosestToBeamLine& tscbl,
const Propagator* thePropagator,
float& pathlength,
TrackSegments& trs) {
pathlength = 0.f;
bool validpropagation = true;
float oldp = traj.measurements().begin()->updatedState().globalMomentum().mag();
float pathlength1 = 0.f;
float pathlength2 = 0.f;
//add pathlength layer by layer
for (auto it = traj.measurements().begin(); it != traj.measurements().end() - 1; ++it) {
const auto& propresult = thePropagator->propagateWithPath(it->updatedState(), (it + 1)->updatedState().surface());
float layerpathlength = std::abs(propresult.second);
if (layerpathlength == 0.f) {
validpropagation = false;
}
pathlength1 += layerpathlength;
// sigma(p) from curvilinear error (on q/p)
float sigma_p = sqrt((it + 1)->updatedState().curvilinearError().matrix()(0, 0)) *
(it + 1)->updatedState().globalMomentum().mag2();
trs.addSegment(layerpathlength, (it + 1)->updatedState().globalMomentum().mag2(), sigma_p);
LogTrace("TrackExtenderWithMTD") << "TSOS " << std::fixed << std::setw(4) << trs.size() << " R_i " << std::fixed
<< std::setw(14) << it->updatedState().globalPosition().perp() << " z_i "
<< std::fixed << std::setw(14) << it->updatedState().globalPosition().z()
<< " R_e " << std::fixed << std::setw(14)
<< (it + 1)->updatedState().globalPosition().perp() << " z_e " << std::fixed
<< std::setw(14) << (it + 1)->updatedState().globalPosition().z() << " p "
<< std::fixed << std::setw(14) << (it + 1)->updatedState().globalMomentum().mag()
<< " dp " << std::fixed << std::setw(14)
<< (it + 1)->updatedState().globalMomentum().mag() - oldp;
oldp = (it + 1)->updatedState().globalMomentum().mag();
}
//add distance from bs to first measurement
auto const& tscblPCA = tscbl.trackStateAtPCA();
auto const& aSurface = traj.direction() == alongMomentum ? traj.firstMeasurement().updatedState().surface()
: traj.lastMeasurement().updatedState().surface();
pathlength2 = thePropagator->propagateWithPath(tscblPCA, aSurface).second;
if (pathlength2 == 0.f) {
validpropagation = false;
}
pathlength = pathlength1 + pathlength2;
float sigma_p = sqrt(tscblPCA.curvilinearError().matrix()(0, 0)) * tscblPCA.momentum().mag2();
trs.addSegment(pathlength2, tscblPCA.momentum().mag2(), sigma_p);
LogTrace("TrackExtenderWithMTD") << "TSOS " << std::fixed << std::setw(4) << trs.size() << " R_e " << std::fixed
<< std::setw(14) << tscblPCA.position().perp() << " z_e " << std::fixed
<< std::setw(14) << tscblPCA.position().z() << " p " << std::fixed << std::setw(14)
<< tscblPCA.momentum().mag() << " dp " << std::fixed << std::setw(14)
<< tscblPCA.momentum().mag() - oldp << " sigma_p = " << std::fixed << std::setw(14)
<< sigma_p << " sigma_p/p = " << std::fixed << std::setw(14)
<< sigma_p / tscblPCA.momentum().mag() * 100 << " %";
return validpropagation;
}
bool trackPathLength(const Trajectory& traj,
const reco::BeamSpot& bs,
const Propagator* thePropagator,
float& pathlength,
TrackSegments& trs) {
pathlength = 0.f;
TrajectoryStateClosestToBeamLine tscbl;
bool tscbl_status = getTrajectoryStateClosestToBeamLine(traj, bs, thePropagator, tscbl);
if (!tscbl_status)
return false;
return trackPathLength(traj, tscbl, thePropagator, pathlength, trs);
}
} // namespace
template <class TrackCollection>
class TrackExtenderWithMTDT : public edm::stream::EDProducer<> {
public:
typedef typename TrackCollection::value_type TrackType;
typedef edm::View<TrackType> InputCollection;
TrackExtenderWithMTDT(const ParameterSet& pset);
template <class H, class T>
void fillValueMap(edm::Event& iEvent, const H& handle, const std::vector<T>& vec, const edm::EDPutToken& token) const;
void produce(edm::Event& ev, const edm::EventSetup& es) final;
static void fillDescriptions(edm::ConfigurationDescriptions& descriptions);
TransientTrackingRecHit::ConstRecHitContainer tryBTLLayers(const TrajectoryStateOnSurface&,
const Trajectory& traj,
const float,
const float,
const TrackSegments&,
const MTDTrackingDetSetVector&,
const MTDDetLayerGeometry*,
const MagneticField* field,
const Propagator* prop,
const reco::BeamSpot& bs,
const float vtxTime,
const bool matchVertex,
MTDHitMatchingInfo& bestHit) const;
TransientTrackingRecHit::ConstRecHitContainer tryETLLayers(const TrajectoryStateOnSurface&,
const Trajectory& traj,
const float,
const float,
const TrackSegments&,
const MTDTrackingDetSetVector&,
const MTDDetLayerGeometry*,
const MagneticField* field,
const Propagator* prop,
const reco::BeamSpot& bs,
const float vtxTime,
const bool matchVertex,
MTDHitMatchingInfo& bestHit) const;
void fillMatchingHits(const DetLayer*,
const TrajectoryStateOnSurface&,
const Trajectory&,
const float,
const float,
const TrackSegments&,
const MTDTrackingDetSetVector&,
const Propagator*,
const reco::BeamSpot&,
const float&,
const bool,
TransientTrackingRecHit::ConstRecHitContainer&,
MTDHitMatchingInfo&) const;
RefitDirection::GeometricalDirection checkRecHitsOrdering(
TransientTrackingRecHit::ConstRecHitContainer const& recHits) const {
if (!recHits.empty()) {
GlobalPoint first = gtg_->idToDet(recHits.front()->geographicalId())->position();
GlobalPoint last = gtg_->idToDet(recHits.back()->geographicalId())->position();
// maybe perp2?
auto rFirst = first.mag2();
auto rLast = last.mag2();
if (rFirst < rLast)
return RefitDirection::insideOut;
if (rFirst > rLast)
return RefitDirection::outsideIn;
}
LogDebug("TrackExtenderWithMTD") << "Impossible to determine the rechits order" << endl;
return RefitDirection::undetermined;
}
reco::Track buildTrack(const reco::TrackRef&,
const Trajectory&,
const Trajectory&,
const reco::BeamSpot&,
const MagneticField* field,
const Propagator* prop,
bool hasMTD,
float& pathLength,
float& tmtdOut,
float& sigmatmtdOut,
float& tofpi,
float& tofk,
float& tofp,
float& sigmatofpi,
float& sigmatofk,
float& sigmatofp) const;
reco::TrackExtra buildTrackExtra(const Trajectory& trajectory) const;
string dumpLayer(const DetLayer* layer) const;
private:
edm::EDPutToken btlMatchChi2Token_;
edm::EDPutToken etlMatchChi2Token_;
edm::EDPutToken btlMatchTimeChi2Token_;
edm::EDPutToken etlMatchTimeChi2Token_;
edm::EDPutToken npixBarrelToken_;
edm::EDPutToken npixEndcapToken_;
edm::EDPutToken pOrigTrkToken_;
edm::EDPutToken betaOrigTrkToken_;
edm::EDPutToken t0OrigTrkToken_;
edm::EDPutToken sigmat0OrigTrkToken_;
edm::EDPutToken pathLengthOrigTrkToken_;
edm::EDPutToken tmtdOrigTrkToken_;
edm::EDPutToken sigmatmtdOrigTrkToken_;
edm::EDPutToken tofpiOrigTrkToken_;
edm::EDPutToken tofkOrigTrkToken_;
edm::EDPutToken tofpOrigTrkToken_;
edm::EDPutToken sigmatofpiOrigTrkToken_;
edm::EDPutToken sigmatofkOrigTrkToken_;
edm::EDPutToken sigmatofpOrigTrkToken_;
edm::EDPutToken assocOrigTrkToken_;
edm::EDGetTokenT<InputCollection> tracksToken_;
edm::EDGetTokenT<TrajTrackAssociationCollection> trajTrackAToken_;
edm::EDGetTokenT<MTDTrackingDetSetVector> hitsToken_;
edm::EDGetTokenT<reco::BeamSpot> bsToken_;
edm::EDGetTokenT<GlobalPoint> genVtxPositionToken_;
edm::EDGetTokenT<float> genVtxTimeToken_;
edm::EDGetTokenT<VertexCollection> vtxToken_;
const bool updateTraj_, updateExtra_, updatePattern_;
const std::string mtdRecHitBuilder_, propagator_, transientTrackBuilder_;
std::unique_ptr<MeasurementEstimator> theEstimator;
std::unique_ptr<TrackTransformer> theTransformer;
edm::ESHandle<TransientTrackBuilder> builder_;
edm::ESGetToken<TransientTrackBuilder, TransientTrackRecord> builderToken_;
edm::ESHandle<TransientTrackingRecHitBuilder> hitbuilder_;
edm::ESGetToken<TransientTrackingRecHitBuilder, TransientRecHitRecord> hitbuilderToken_;
edm::ESHandle<GlobalTrackingGeometry> gtg_;
edm::ESGetToken<GlobalTrackingGeometry, GlobalTrackingGeometryRecord> gtgToken_;
edm::ESGetToken<MTDDetLayerGeometry, MTDRecoGeometryRecord> dlgeoToken_;
edm::ESGetToken<MagneticField, IdealMagneticFieldRecord> magfldToken_;
edm::ESGetToken<Propagator, TrackingComponentsRecord> propToken_;
edm::ESGetToken<TrackerTopology, TrackerTopologyRcd> ttopoToken_;
const float estMaxChi2_;
const float estMaxNSigma_;
const float btlChi2Cut_;
const float btlTimeChi2Cut_;
const float etlChi2Cut_;
const float etlTimeChi2Cut_;
const bool useVertex_;
const bool useSimVertex_;
const float dzCut_;
const float bsTimeSpread_;
};
template <class TrackCollection>
TrackExtenderWithMTDT<TrackCollection>::TrackExtenderWithMTDT(const ParameterSet& iConfig)
: tracksToken_(consumes<InputCollection>(iConfig.getParameter<edm::InputTag>("tracksSrc"))),
trajTrackAToken_(consumes<TrajTrackAssociationCollection>(iConfig.getParameter<edm::InputTag>("trjtrkAssSrc"))),
hitsToken_(consumes<MTDTrackingDetSetVector>(iConfig.getParameter<edm::InputTag>("hitsSrc"))),
bsToken_(consumes<reco::BeamSpot>(iConfig.getParameter<edm::InputTag>("beamSpotSrc"))),
updateTraj_(iConfig.getParameter<bool>("updateTrackTrajectory")),
updateExtra_(iConfig.getParameter<bool>("updateTrackExtra")),
updatePattern_(iConfig.getParameter<bool>("updateTrackHitPattern")),
mtdRecHitBuilder_(iConfig.getParameter<std::string>("MTDRecHitBuilder")),
propagator_(iConfig.getParameter<std::string>("Propagator")),
transientTrackBuilder_(iConfig.getParameter<std::string>("TransientTrackBuilder")),
estMaxChi2_(iConfig.getParameter<double>("estimatorMaxChi2")),
estMaxNSigma_(iConfig.getParameter<double>("estimatorMaxNSigma")),
btlChi2Cut_(iConfig.getParameter<double>("btlChi2Cut")),
btlTimeChi2Cut_(iConfig.getParameter<double>("btlTimeChi2Cut")),
etlChi2Cut_(iConfig.getParameter<double>("etlChi2Cut")),
etlTimeChi2Cut_(iConfig.getParameter<double>("etlTimeChi2Cut")),
useVertex_(iConfig.getParameter<bool>("useVertex")),
useSimVertex_(iConfig.getParameter<bool>("useSimVertex")),
dzCut_(iConfig.getParameter<double>("dZCut")),
bsTimeSpread_(iConfig.getParameter<double>("bsTimeSpread")) {
if (useVertex_) {
if (useSimVertex_) {
genVtxPositionToken_ = consumes<GlobalPoint>(iConfig.getParameter<edm::InputTag>("genVtxPositionSrc"));
genVtxTimeToken_ = consumes<float>(iConfig.getParameter<edm::InputTag>("genVtxTimeSrc"));
} else
vtxToken_ = consumes<VertexCollection>(iConfig.getParameter<edm::InputTag>("vtxSrc"));
}
theEstimator = std::make_unique<Chi2MeasurementEstimator>(estMaxChi2_, estMaxNSigma_);
theTransformer = std::make_unique<TrackTransformer>(iConfig.getParameterSet("TrackTransformer"), consumesCollector());
btlMatchChi2Token_ = produces<edm::ValueMap<float>>("btlMatchChi2");
etlMatchChi2Token_ = produces<edm::ValueMap<float>>("etlMatchChi2");
btlMatchTimeChi2Token_ = produces<edm::ValueMap<float>>("btlMatchTimeChi2");
etlMatchTimeChi2Token_ = produces<edm::ValueMap<float>>("etlMatchTimeChi2");
npixBarrelToken_ = produces<edm::ValueMap<int>>("npixBarrel");
npixEndcapToken_ = produces<edm::ValueMap<int>>("npixEndcap");
pOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTrackp");
betaOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTrackBeta");
t0OrigTrkToken_ = produces<edm::ValueMap<float>>("generalTrackt0");
sigmat0OrigTrkToken_ = produces<edm::ValueMap<float>>("generalTracksigmat0");
pathLengthOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTrackPathLength");
tmtdOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTracktmtd");
sigmatmtdOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTracksigmatmtd");
tofpiOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTrackTofPi");
tofkOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTrackTofK");
tofpOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTrackTofP");
sigmatofpiOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTrackSigmaTofPi");
sigmatofkOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTrackSigmaTofK");
sigmatofpOrigTrkToken_ = produces<edm::ValueMap<float>>("generalTrackSigmaTofP");
assocOrigTrkToken_ = produces<edm::ValueMap<int>>("generalTrackassoc");
builderToken_ = esConsumes<TransientTrackBuilder, TransientTrackRecord>(edm::ESInputTag("", transientTrackBuilder_));
hitbuilderToken_ =
esConsumes<TransientTrackingRecHitBuilder, TransientRecHitRecord>(edm::ESInputTag("", mtdRecHitBuilder_));
gtgToken_ = esConsumes<GlobalTrackingGeometry, GlobalTrackingGeometryRecord>();
dlgeoToken_ = esConsumes<MTDDetLayerGeometry, MTDRecoGeometryRecord>();
magfldToken_ = esConsumes<MagneticField, IdealMagneticFieldRecord>();
propToken_ = esConsumes<Propagator, TrackingComponentsRecord>(edm::ESInputTag("", propagator_));
ttopoToken_ = esConsumes<TrackerTopology, TrackerTopologyRcd>();
produces<edm::OwnVector<TrackingRecHit>>();
produces<reco::TrackExtraCollection>();
produces<TrackCollection>();
}
template <class TrackCollection>
void TrackExtenderWithMTDT<TrackCollection>::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
edm::ParameterSetDescription desc, transDesc;
desc.add<edm::InputTag>("tracksSrc", edm::InputTag("generalTracks"));
desc.add<edm::InputTag>("trjtrkAssSrc", edm::InputTag("generalTracks"));
desc.add<edm::InputTag>("hitsSrc", edm::InputTag("mtdTrackingRecHits"));
desc.add<edm::InputTag>("beamSpotSrc", edm::InputTag("offlineBeamSpot"));
desc.add<edm::InputTag>("genVtxPositionSrc", edm::InputTag("genParticles:xyz0"));
desc.add<edm::InputTag>("genVtxTimeSrc", edm::InputTag("genParticles:t0"));
desc.add<edm::InputTag>("vtxSrc", edm::InputTag("offlinePrimaryVertices4D"));
desc.add<bool>("updateTrackTrajectory", true);
desc.add<bool>("updateTrackExtra", true);
desc.add<bool>("updateTrackHitPattern", true);
desc.add<std::string>("TransientTrackBuilder", "TransientTrackBuilder");
desc.add<std::string>("MTDRecHitBuilder", "MTDRecHitBuilder");
desc.add<std::string>("Propagator", "PropagatorWithMaterialForMTD");
TrackTransformer::fillPSetDescription(transDesc,
false,
"KFFitterForRefitInsideOut",
"KFSmootherForRefitInsideOut",
"PropagatorWithMaterialForMTD",
"alongMomentum",
true,
"WithTrackAngle",
"MuonRecHitBuilder",
"MTDRecHitBuilder");
desc.add<edm::ParameterSetDescription>("TrackTransformer", transDesc);
desc.add<double>("estimatorMaxChi2", 500.);
desc.add<double>("estimatorMaxNSigma", 10.);
desc.add<double>("btlChi2Cut", 50.);
desc.add<double>("btlTimeChi2Cut", 10.);
desc.add<double>("etlChi2Cut", 50.);
desc.add<double>("etlTimeChi2Cut", 10.);
desc.add<bool>("useVertex", false);
desc.add<bool>("useSimVertex", false);
desc.add<double>("dZCut", 0.1);
desc.add<double>("bsTimeSpread", 0.2);
descriptions.add("trackExtenderWithMTDBase", desc);
}
template <class TrackCollection>
template <class H, class T>
void TrackExtenderWithMTDT<TrackCollection>::fillValueMap(edm::Event& iEvent,
const H& handle,
const std::vector<T>& vec,
const edm::EDPutToken& token) const {
auto out = std::make_unique<edm::ValueMap<T>>();
typename edm::ValueMap<T>::Filler filler(*out);
filler.insert(handle, vec.begin(), vec.end());
filler.fill();
iEvent.put(token, std::move(out));
}
template <class TrackCollection>
void TrackExtenderWithMTDT<TrackCollection>::produce(edm::Event& ev, const edm::EventSetup& es) {
//this produces pieces of the track extra
Traj2TrackHits t2t;
theTransformer->setServices(es);
TrackingRecHitRefProd hitsRefProd = ev.getRefBeforePut<TrackingRecHitCollection>();
reco::TrackExtraRefProd extrasRefProd = ev.getRefBeforePut<reco::TrackExtraCollection>();
gtg_ = es.getHandle(gtgToken_);
auto geo = es.getTransientHandle(dlgeoToken_);
auto magfield = es.getTransientHandle(magfldToken_);
builder_ = es.getHandle(builderToken_);
hitbuilder_ = es.getHandle(hitbuilderToken_);
auto propH = es.getTransientHandle(propToken_);
const Propagator* prop = propH.product();
auto httopo = es.getTransientHandle(ttopoToken_);
const TrackerTopology& ttopo = *httopo;
auto output = std::make_unique<TrackCollection>();
auto extras = std::make_unique<reco::TrackExtraCollection>();
auto outhits = std::make_unique<edm::OwnVector<TrackingRecHit>>();
std::vector<float> btlMatchChi2;
std::vector<float> etlMatchChi2;
std::vector<float> btlMatchTimeChi2;
std::vector<float> etlMatchTimeChi2;
std::vector<int> npixBarrel;
std::vector<int> npixEndcap;
std::vector<float> pOrigTrkRaw;
std::vector<float> betaOrigTrkRaw;
std::vector<float> t0OrigTrkRaw;
std::vector<float> sigmat0OrigTrkRaw;
std::vector<float> pathLengthsOrigTrkRaw;
std::vector<float> tmtdOrigTrkRaw;
std::vector<float> sigmatmtdOrigTrkRaw;
std::vector<float> tofpiOrigTrkRaw;
std::vector<float> tofkOrigTrkRaw;
std::vector<float> tofpOrigTrkRaw;
std::vector<float> sigmatofpiOrigTrkRaw;
std::vector<float> sigmatofkOrigTrkRaw;
std::vector<float> sigmatofpOrigTrkRaw;
std::vector<int> assocOrigTrkRaw;
auto const tracksH = ev.getHandle(tracksToken_);
const auto& trjtrks = ev.get(trajTrackAToken_);
//MTD hits DetSet
const auto& hits = ev.get(hitsToken_);
//beam spot
const auto& bs = ev.get(bsToken_);
const Vertex* pv = nullptr;
if (useVertex_ && !useSimVertex_) {
auto const& vtxs = ev.get(vtxToken_);
if (!vtxs.empty())
pv = &vtxs[0];
}
std::unique_ptr<math::XYZTLorentzVectorF> genPV(nullptr);
if (useVertex_ && useSimVertex_) {
const auto& genVtxPosition = ev.get(genVtxPositionToken_);
const auto& genVtxTime = ev.get(genVtxTimeToken_);
genPV = std::make_unique<math::XYZTLorentzVectorF>(
genVtxPosition.x(), genVtxPosition.y(), genVtxPosition.z(), genVtxTime);
}
float vtxTime = 0.f;
if (useVertex_) {
if (useSimVertex_ && genPV) {
vtxTime = genPV->t();
} else if (pv)
vtxTime = pv->t(); //already in ns
}
std::vector<unsigned> track_indices;
unsigned itrack = 0;
for (const auto& trjtrk : trjtrks) {
const Trajectory& trajs = *trjtrk.key;
const reco::TrackRef& track = trjtrk.val;
LogTrace("TrackExtenderWithMTD") << "TrackExtenderWithMTD: extrapolating track " << itrack
<< " p/pT = " << track->p() << " " << track->pt() << " eta = " << track->eta();
LogTrace("TrackExtenderWithMTD") << "TrackExtenderWithMTD: sigma_p = "
<< sqrt(track->covariance()(0, 0)) * track->p2()
<< " sigma_p/p = " << sqrt(track->covariance()(0, 0)) * track->p() * 100 << " %";
float trackVtxTime = 0.f;
if (useVertex_) {
float dz;
if (useSimVertex_)
dz = std::abs(track->dz(math::XYZPoint(*genPV)));
else
dz = std::abs(track->dz(pv->position()));
if (dz < dzCut_)
trackVtxTime = vtxTime;
}
reco::TransientTrack ttrack(track, magfield.product(), gtg_);
auto thits = theTransformer->getTransientRecHits(ttrack);
TransientTrackingRecHit::ConstRecHitContainer mtdthits;
MTDHitMatchingInfo mBTL, mETL;
if (trajs.isValid()) {
// get the outermost trajectory point on the track
TrajectoryStateOnSurface tsos = builder_->build(track).outermostMeasurementState();
TrajectoryStateClosestToBeamLine tscbl;
bool tscbl_status = getTrajectoryStateClosestToBeamLine(trajs, bs, prop, tscbl);
if (tscbl_status) {
float pmag2 = tscbl.trackStateAtPCA().momentum().mag2();
float pathlength0;
TrackSegments trs0;
trackPathLength(trajs, tscbl, prop, pathlength0, trs0);
const auto& btlhits = tryBTLLayers(tsos,
trajs,
pmag2,
pathlength0,
trs0,
hits,
geo.product(),
magfield.product(),
prop,
bs,
trackVtxTime,
trackVtxTime != 0.f,
mBTL);
mtdthits.insert(mtdthits.end(), btlhits.begin(), btlhits.end());
// in the future this should include an intermediate refit before propagating to the ETL
// for now it is ok
const auto& etlhits = tryETLLayers(tsos,
trajs,
pmag2,
pathlength0,
trs0,
hits,
geo.product(),
magfield.product(),
prop,
bs,
trackVtxTime,
trackVtxTime != 0.f,
mETL);
mtdthits.insert(mtdthits.end(), etlhits.begin(), etlhits.end());
}
}
auto ordering = checkRecHitsOrdering(thits);
if (ordering == RefitDirection::insideOut) {
thits.insert(thits.end(), mtdthits.begin(), mtdthits.end());
} else {
std::reverse(mtdthits.begin(), mtdthits.end());
mtdthits.insert(mtdthits.end(), thits.begin(), thits.end());
thits.swap(mtdthits);
}
const auto& trajwithmtd =
mtdthits.empty() ? std::vector<Trajectory>(1, trajs) : theTransformer->transform(ttrack, thits);
float pMap = 0.f, betaMap = 0.f, t0Map = 0.f, sigmat0Map = -1.f, pathLengthMap = -1.f, tmtdMap = 0.f,
sigmatmtdMap = -1.f, tofpiMap = 0.f, tofkMap = 0.f, tofpMap = 0.f, sigmatofpiMap = -1.f, sigmatofkMap = -1.f,
sigmatofpMap = -1.f;
int iMap = -1;
for (const auto& trj : trajwithmtd) {
const auto& thetrj = (updateTraj_ ? trj : trajs);
float pathLength = 0.f, tmtd = 0.f, sigmatmtd = -1.f, tofpi = 0.f, tofk = 0.f, tofp = 0.f, sigmatofpi = -1.f,
sigmatofk = -1.f, sigmatofp = -1.f;
LogTrace("TrackExtenderWithMTD") << "TrackExtenderWithMTD: refit track " << itrack << " p/pT = " << track->p()
<< " " << track->pt() << " eta = " << track->eta();
reco::Track result = buildTrack(track,
thetrj,
trj,
bs,
magfield.product(),
prop,
!trajwithmtd.empty() && !mtdthits.empty(),
pathLength,
tmtd,
sigmatmtd,
tofpi,
tofk,
tofp,
sigmatofpi,
sigmatofk,
sigmatofp);
if (result.ndof() >= 0) {
/// setup the track extras
reco::TrackExtra::TrajParams trajParams;
reco::TrackExtra::Chi2sFive chi2s;
size_t hitsstart = outhits->size();
if (updatePattern_) {
t2t(trj, *outhits, trajParams, chi2s); // this fills the output hit collection
} else {
t2t(thetrj, *outhits, trajParams, chi2s);
}
size_t hitsend = outhits->size();
extras->push_back(buildTrackExtra(trj)); // always push back the fully built extra, update by setting in track
extras->back().setHits(hitsRefProd, hitsstart, hitsend - hitsstart);
extras->back().setTrajParams(trajParams, chi2s);
//create the track
output->push_back(result);
btlMatchChi2.push_back(mBTL.hit ? mBTL.estChi2 : -1.f);
etlMatchChi2.push_back(mETL.hit ? mETL.estChi2 : -1.f);
btlMatchTimeChi2.push_back(mBTL.hit ? mBTL.timeChi2 : -1.f);
etlMatchTimeChi2.push_back(mETL.hit ? mETL.timeChi2 : -1.f);
pathLengthMap = pathLength;
tmtdMap = tmtd;
sigmatmtdMap = sigmatmtd;
auto& backtrack = output->back();
iMap = output->size() - 1;
pMap = backtrack.p();
betaMap = backtrack.beta();
t0Map = backtrack.t0();
sigmat0Map = std::copysign(std::sqrt(std::abs(backtrack.covt0t0())), backtrack.covt0t0());
tofpiMap = tofpi;
tofkMap = tofk;
tofpMap = tofp;
sigmatofpiMap = sigmatofpi;
sigmatofkMap = sigmatofk;
sigmatofpMap = sigmatofp;
reco::TrackExtraRef extraRef(extrasRefProd, extras->size() - 1);
backtrack.setExtra((updateExtra_ ? extraRef : track->extra()));
for (unsigned ihit = hitsstart; ihit < hitsend; ++ihit) {
backtrack.appendHitPattern((*outhits)[ihit], ttopo);
}
npixBarrel.push_back(backtrack.hitPattern().numberOfValidPixelBarrelHits());
npixEndcap.push_back(backtrack.hitPattern().numberOfValidPixelEndcapHits());
LogTrace("TrackExtenderWithMTD") << "TrackExtenderWithMTD: tmtd " << tmtdMap << " +/- " << sigmatmtdMap
<< " t0 " << t0Map << " +/- " << sigmat0Map << " tof pi/K/p " << tofpiMap
<< "+/-" << fmt::format("{:0.2g}", sigmatofpiMap) << " ("
<< fmt::format("{:0.2g}", sigmatofpiMap / tofpiMap * 100) << "%) " << tofkMap
<< "+/-" << fmt::format("{:0.2g}", sigmatofkMap) << " ("
<< fmt::format("{:0.2g}", sigmatofkMap / tofkMap * 100) << "%) " << tofpMap
<< "+/-" << fmt::format("{:0.2g}", sigmatofpMap) << " ("
<< fmt::format("{:0.2g}", sigmatofpMap / tofpMap * 100) << "%) ";
} else {
LogTrace("TrackExtenderWithMTD") << "Error in the MTD track refitting. This should not happen";
}
}
pOrigTrkRaw.push_back(pMap);
betaOrigTrkRaw.push_back(betaMap);
t0OrigTrkRaw.push_back(t0Map);
sigmat0OrigTrkRaw.push_back(sigmat0Map);
pathLengthsOrigTrkRaw.push_back(pathLengthMap);
tmtdOrigTrkRaw.push_back(tmtdMap);
sigmatmtdOrigTrkRaw.push_back(sigmatmtdMap);
tofpiOrigTrkRaw.push_back(tofpiMap);
tofkOrigTrkRaw.push_back(tofkMap);
tofpOrigTrkRaw.push_back(tofpMap);
sigmatofpiOrigTrkRaw.push_back(sigmatofpiMap);
sigmatofkOrigTrkRaw.push_back(sigmatofkMap);
sigmatofpOrigTrkRaw.push_back(sigmatofpMap);
assocOrigTrkRaw.push_back(iMap);
if (iMap == -1) {
btlMatchChi2.push_back(-1.f);