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// $Id: ProducerConversions.cc,v 1.17 2009/10/04 12:49:26 bendavid Exp $
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#include "MitEdm/Producers/interface/ProducerConversions.h"
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#include "DataFormats/Common/interface/Handle.h"
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#include "DataFormats/TrackReco/interface/Track.h"
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#include "DataFormats/TrackReco/interface/TrackFwd.h"
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#include "DataFormats/VertexReco/interface/Vertex.h"
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#include "DataFormats/VertexReco/interface/VertexFwd.h"
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#include "MagneticField/Engine/interface/MagneticField.h"
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#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"
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#include "MitEdm/Producers/interface/HitDropperRecord.h"
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#include "MitEdm/Producers/interface/HitDropper.h"
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#include "MitEdm/DataFormats/interface/Types.h"
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#include "MitEdm/DataFormats/interface/Collections.h"
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#include "MitEdm/DataFormats/interface/DecayPart.h"
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#include "MitEdm/DataFormats/interface/StablePart.h"
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#include "MitEdm/DataFormats/interface/StableData.h"
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#include "MitEdm/VertexFitInterface/interface/MvfInterface.h"
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#include "MitEdm/VertexFitInterface/interface/HisInterface.h"
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using namespace std;
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using namespace edm;
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using namespace reco;
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using namespace mitedm;
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using namespace mithep;
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//--------------------------------------------------------------------------------------------------
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ProducerConversions::ProducerConversions(const ParameterSet& cfg) :
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BaseCandProducer (cfg),
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iStables1_ (cfg.getUntrackedParameter<string>("iStables1","")),
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iStables2_ (cfg.getUntrackedParameter<string>("iStables2","")),
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iPVertexes_ (cfg.getUntrackedParameter<string>("iPVertexes","offlinePrimaryVerticesWithBS")),
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usePVertex_ (cfg.getUntrackedParameter<bool> ("usePVertex",true)),
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convConstraint_ (cfg.getUntrackedParameter<bool> ("convConstraint",false)),
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convConstraint3D_(cfg.getUntrackedParameter<bool> ("convConstraint3D",true)),
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rhoMin_ (cfg.getUntrackedParameter<double>("rhoMin",0.0)),
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useHitDropper_ (cfg.getUntrackedParameter<bool> ("useHitDropper",true))
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{
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// Constructor.
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produces<DecayPartCol>();
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}
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//--------------------------------------------------------------------------------------------------
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ProducerConversions::~ProducerConversions()
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{
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// Destructor.
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}
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//--------------------------------------------------------------------------------------------------
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void ProducerConversions::produce(Event &evt, const EventSetup &setup)
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{
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// Produce our DecayPartCol.
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// First input collection
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Handle<StablePartCol> hStables1;
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if (!GetProduct(iStables1_, hStables1, evt)) {
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printf("Stable collection 1 not found in ProducerConversions\n");
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return;
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}
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const StablePartCol *pS1 = hStables1.product();
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// Second input collection
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Handle<StablePartCol> hStables2;
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if (!GetProduct(iStables2_, hStables2, evt)) {
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printf("Stable collection 2 not found in ProducerConversions\n");
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return;
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}
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const StablePartCol *pS2 = hStables2.product();
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const reco::Vertex *vertex = 0;
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mitedm::VertexPtr vPtr;
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if (usePVertex_) {
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// Primary vertex collection
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Handle<reco::VertexCollection> hVertexes;
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if (!GetProduct(iPVertexes_, hVertexes, evt))
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return;
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const reco::VertexCollection *pV = hVertexes.product();
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//Choose the primary vertex with the largest number of tracks
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UInt_t maxTracks=0;
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for (UInt_t i=0; i<pV->size(); ++i) {
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const reco::Vertex &v = pV->at(i);
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UInt_t nTracks = v.tracksSize();
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if (nTracks >= maxTracks) {
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maxTracks = nTracks;
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vertex = &v;
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vPtr = mitedm::VertexPtr(hVertexes,i);
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}
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}
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}
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// Get hit dropper
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ESHandle<HitDropper> hDropper;
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setup.get<HitDropperRecord>().get("HitDropper",hDropper);
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const HitDropper *dropper = hDropper.product();
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//Get Magnetic Field from event setup, taking value at (0,0,0)
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edm::ESHandle<MagneticField> magneticField;
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setup.get<IdealMagneticFieldRecord>().get(magneticField);
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const double bfield = magneticField->inTesla(GlobalPoint(0.,0.,0.)).z();
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// Create the output collection
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auto_ptr<DecayPartCol> pD(new DecayPartCol());
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// Simple double loop
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for (UInt_t i = 0; i<pS1->size(); ++i) {
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const StablePart &s1 = pS1->at(i);
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UInt_t j;
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if (iStables1_ == iStables2_)
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j = i+1;
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else
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j = 0;
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for (; j<pS2->size(); ++j) {
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const StablePart &s2 = pS2->at(j);
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//Do fast helix fit to check if there's any hope
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const reco::Track * t1 = s1.track();
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const reco::Track * t2 = s2.track();
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int trackCharge = t1->charge() + t2->charge();
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double dR0 = 0.0;
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if (trackCharge==0) {
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HisInterface hisInt(t1,t2);
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const mithep::HelixIntersector *his = hisInt.hISector();
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dR0 = sqrt(his->IntersectionI(0).Location().X()*his->IntersectionI(0).Location().X()+
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his->IntersectionI(0).Location().Y()*his->IntersectionI(0).Location().Y());
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}
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int fitStatus = 0;
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MultiVertexFitterD fit;
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if (trackCharge==0 && dR0 > rhoMin_) {
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// Vertex fit now, possibly with conversion constraint
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fit.init(bfield); // Reset to the magnetic field from the event setup
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MvfInterface fitInt(&fit);
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fitInt.addTrack(s1.track(),1,s1.mass(),MultiVertexFitterD::VERTEX_1);
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fitInt.addTrack(s2.track(),2,s2.mass(),MultiVertexFitterD::VERTEX_1);
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if (convConstraint3D_) {
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fit.conversion_3d(MultiVertexFitterD::VERTEX_1);
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//printf("applying 3d conversion constraint\n");
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}
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else if (convConstraint_) {
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fit.conversion_2d(MultiVertexFitterD::VERTEX_1);
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//printf("applying 2d conversion constraint\n");
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}
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//initialize primary vertex parameters in the fitter
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if (usePVertex_) {
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float vErr[3][3];
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for (UInt_t vi=0; vi<3; ++vi)
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for (UInt_t vj=0; vj<3; ++vj)
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vErr[vi][vj] = vertex->covariance(vi,vj);
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fit.setPrimaryVertex(vertex->x(),vertex->y(),vertex->z());
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fit.setPrimaryVertexError(vErr);
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}
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fitStatus = fit.fit();
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}
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if (fitStatus) {
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DecayPart *d = new DecayPart(oPid_,DecayPart::Fast);
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// Update temporarily some of the quantities (prob, chi2, nDoF, mass, lxy, pt, fourMomentum)
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d->setProb(fit.prob());
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d->setChi2(fit.chisq());
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d->setNdof(fit.ndof());
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FourVector p4Fitted(0.,0.,0.,0.);
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p4Fitted += fit.getTrackP4(1);
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p4Fitted += fit.getTrackP4(2);
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d->setFourMomentum(p4Fitted);
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d->setPosition(fit.getVertex (MultiVertexFitterD::VERTEX_1));
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d->setError (fit.getErrorMatrix(MultiVertexFitterD::VERTEX_1));
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float mass, massErr;
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const int trksIds[2] = { 1, 2 };
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mass = fit.getMass(2,trksIds,massErr);
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ThreeVector p3Fitted(p4Fitted.px(), p4Fitted.py(), p4Fitted.pz());
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// Get decay length in xy plane
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float dl, dlErr;
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dl = fit.getDecayLength(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
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p3Fitted, dlErr);
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// Get Z decay length
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float dlz, dlzErr;
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dlz = fit.getZDecayLength(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
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p3Fitted, dlzErr);
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// Get impact parameter
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float dxy, dxyErr;
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dxy = fit.getImpactPar(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
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p3Fitted, dxyErr);
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BasePartPtr ptr1(hStables1,i);
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BasePartPtr ptr2(hStables2,j);
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StableData c1(fit.getTrackP4(1).px(),fit.getTrackP4(1).py(), fit.getTrackP4(1).pz(), ptr1);
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StableData c2(fit.getTrackP4(2).px(),fit.getTrackP4(2).py(), fit.getTrackP4(2).pz(), ptr2);
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const ThreeVector vtxPos = fit.getVertex(MultiVertexFitterD::VERTEX_1);
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const ThreeVector trkMom1(fit.getTrackP4(1).px(),
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fit.getTrackP4(1).py(),
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fit.getTrackP4(1).pz());
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const ThreeVector trkMom2(fit.getTrackP4(2).px(),
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fit.getTrackP4(2).py(),
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fit.getTrackP4(2).pz());
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// Build corrected HitPattern for StableData, removing hits before the fit vertex
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if (useHitDropper_) {
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reco::HitPattern hits1 = dropper->CorrectedHitsAOD(s1.track(), vtxPos, trkMom1, dlErr, dlzErr);
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reco::HitPattern hits2 = dropper->CorrectedHitsAOD(s2.track(), vtxPos, trkMom2, dlErr, dlzErr);
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c1.SetHits(hits1);
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c2.SetHits(hits2);
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c1.SetHitsFilled();
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c2.SetHitsFilled();
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}
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d->addStableChild(c1);
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d->addStableChild(c2);
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d->setFittedMass (mass);
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d->setFittedMassError(massErr);
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d->setLxy(dl);
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d->setLxyError(dlErr);
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d->setLxyToPv(dl);
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d->setLxyToPvError(dlErr);
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d->setLz(dlz);
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d->setLzError(dlzErr);
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d->setLzToPv(dlz);
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d->setLzToPvError(dlzErr);
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d->setDxy(dxy);
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d->setDxyError(dxyErr);
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d->setDxyToPv(dxy);
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d->setDxyToPvError(dxyErr);
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if (usePVertex_)
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d->setPrimaryVertex(vPtr);
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// Put the result into our collection
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pD->push_back(*d);
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delete d;
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}
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}
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}
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// Write the collection even if it is empty
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if (0) {
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cout << " ProducerConversions::produce - " << pD->size() << " entries collection created -"
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<< " (Pid: " << oPid_ << ")\n";
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}
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evt.put(pD);
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}
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//define this as a plug-in
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DEFINE_FWK_MODULE(ProducerConversions);
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