Producers/src/ProducerConversions.cc

// $Id: ProducerConversions.cc,v 1.24 2010/06/08 20:17:30 bendavid Exp $

#include "MitEdm/Producers/interface/ProducerConversions.h"
#include "DataFormats/Common/interface/Handle.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/VertexReco/interface/Vertex.h"
#include "DataFormats/VertexReco/interface/VertexFwd.h"
#include "MagneticField/Engine/interface/MagneticField.h"
#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"
#include "TrackingTools/TrajectoryState/interface/TrajectoryStateTransform.h"
#include "TrackingTools/PatternTools/interface/ClosestApproachInRPhi.h"
#include "MitEdm/Producers/interface/HitDropperRecord.h"
#include "MitEdm/Producers/interface/HitDropper.h"
#include "MitEdm/DataFormats/interface/Types.h"
#include "MitEdm/DataFormats/interface/Collections.h"
#include "MitEdm/DataFormats/interface/DecayPart.h"
#include "MitEdm/DataFormats/interface/StablePart.h"
#include "MitEdm/DataFormats/interface/StableData.h"
#include "MitEdm/VertexFitInterface/interface/MvfInterface.h"
#include "MitEdm/VertexFitInterface/interface/TrackParameters.h"
#include <TMath.h>

using namespace std;
using namespace edm;
using namespace reco;
using namespace mitedm;
using namespace mithep;

//--------------------------------------------------------------------------------------------------
ProducerConversions::ProducerConversions(const ParameterSet& cfg) :
  BaseCandProducer (cfg),
  iStables1_       (cfg.getUntrackedParameter<string>("iStables1","")),
  iStables2_       (cfg.getUntrackedParameter<string>("iStables2","")),
  iPVertexes_      (cfg.getUntrackedParameter<string>("iPVertexes","offlinePrimaryVerticesWithBS")),
  usePVertex_      (cfg.getUntrackedParameter<bool>  ("usePVertex",true)),
  convConstraint_  (cfg.getUntrackedParameter<bool>  ("convConstraint",false)),
  convConstraint3D_(cfg.getUntrackedParameter<bool>  ("convConstraint3D",true)),
  rhoMin_          (cfg.getUntrackedParameter<double>("rhoMin",0.0)),
  useRhoMin_       (cfg.getUntrackedParameter<bool>  ("useRhoMin",true)),
  useHitDropper_   (cfg.getUntrackedParameter<bool>  ("useHitDropper",true)),
  applyChargeConstraint_(cfg.getUntrackedParameter<bool>  ("applyChargeConstraint",false))
{
  // Constructor.

  produces<DecayPartCol>();
}

//--------------------------------------------------------------------------------------------------
ProducerConversions::~ProducerConversions()
{
  // Destructor.
}

//--------------------------------------------------------------------------------------------------
void ProducerConversions::produce(Event &evt, const EventSetup &setup)
{
  // Produce our DecayPartCol.

  // First input collection
  Handle<StablePartCol> hStables1;
  if (!GetProduct(iStables1_, hStables1, evt)) {
    printf("Stable collection 1 not found in ProducerConversions\n");
    return;  
  }
  const StablePartCol *pS1 = hStables1.product();
  // Second input collection
  Handle<StablePartCol> hStables2;
  if (!GetProduct(iStables2_, hStables2, evt)) {
    printf("Stable collection 2 not found in ProducerConversions\n");
    return;
  }
  const StablePartCol *pS2 = hStables2.product();

  const reco::Vertex *vertex = 0;
  mitedm::VertexPtr vPtr;
  if (usePVertex_) {
    // Primary vertex collection
    Handle<reco::VertexCollection> hVertexes;
    if (!GetProduct(iPVertexes_, hVertexes, evt))
      return;
    const reco::VertexCollection *pV = hVertexes.product();
  
    //Choose the primary vertex with the largest number of tracks
    UInt_t maxTracks=0;
    for (UInt_t i=0; i<pV->size(); ++i) {
      const reco::Vertex &v = pV->at(i);
      UInt_t nTracks = v.tracksSize();
      if (nTracks >= maxTracks) {
        maxTracks = nTracks;
        vertex = &v;
        vPtr = mitedm::VertexPtr(hVertexes,i);
      }
    }
  }
  
  // Get hit dropper
  ESHandle<HitDropper> hDropper;
  setup.get<HitDropperRecord>().get("HitDropper",hDropper);
  const HitDropper *dropper = hDropper.product();
  
  //Get Magnetic Field from event setup, taking value at (0,0,0)
  edm::ESHandle<MagneticField> magneticField;
  setup.get<IdealMagneticFieldRecord>().get(magneticField);
  const double bfield = magneticField->inTesla(GlobalPoint(0.,0.,0.)).z();
  
  edm::ESHandle<TransientTrackBuilder> hTransientTrackBuilder;
  setup.get<TransientTrackRecord>().get("TransientTrackBuilder",hTransientTrackBuilder);
  const TransientTrackBuilder *transientTrackBuilder = hTransientTrackBuilder.product();
  
  //construct intermediate collection of TrackParameters in mvf format for vertex fit
  std::vector<TrackParameters> trkPars1;
  for (UInt_t i = 0; i<pS1->size(); ++i) {
    const reco::Track *t = pS1->at(i).track();
    const reco::TransientTrack ttrk = transientTrackBuilder->build(t);
    TrackParameters cmsTrk(ttrk);
    TrackParameters mvfTrk = cmsTrk.mvfTrack(); 
    trkPars1.push_back(mvfTrk);
  }
  
  bool sameCollection = iStables1_ == iStables2_;
  
  std::vector<TrackParameters> trkPars2;
  if (sameCollection)
    trkPars2 = trkPars1;
  else for (UInt_t i = 0; i<pS2->size(); ++i) {
    const reco::Track *t = pS2->at(i).track();
    const reco::TransientTrack ttrk = transientTrackBuilder->build(t);
    TrackParameters cmsTrk(ttrk);
    TrackParameters mvfTrk = cmsTrk.mvfTrack(); 
    trkPars2.push_back(mvfTrk);
  }

  
  // Create the output collection
  auto_ptr<DecayPartCol> pD(new DecayPartCol());
  
  ClosestApproachInRPhi helixIntersector;
  
  int nFits = 0;
  
  //printf("S1 size = %i\n", pS1->size());
  
  std::set<std::pair<edm::Ptr<reco::Track>,edm::Ptr<reco::Track> > > pairSet;
  // Simple double loop
  for (UInt_t i = 0; i<pS1->size(); ++i) {
    const StablePart &s1 =  pS1->at(i);
    
    const reco::Track * t1 = s1.track();
    const TrackParameters &trkPar1 = trkPars1.at(i);
    
    UInt_t j;
    if (sameCollection)
      j = i+1; 
    else
      j = 0;
    

    FreeTrajectoryState initialState1 = trajectoryStateTransform::initialFreeState(*s1.track(),&*magneticField);
    
    for (; j<pS2->size(); ++j) {
      const StablePart &s2 = pS2->at(j);
      
      if (!sameCollection) {
        std::pair<edm::Ptr<reco::Track>,edm::Ptr<reco::Track> > pair1(s1.trackPtr(),s2.trackPtr());
        std::pair<edm::Ptr<reco::Track>,edm::Ptr<reco::Track> > pair2(s2.trackPtr(),s1.trackPtr());
        if (pairSet.find(pair1)!=pairSet.end() || pairSet.find(pair2)!=pairSet.end()) {
          continue;
        }
        
        pairSet.insert(pair1);
        pairSet.insert(pair2);
      }
      
      //Do fast helix fit to check if there's any hope
      const reco::Track * t2 = s2.track();
      const TrackParameters &trkPar2 = trkPars2.at(j);
      
      int trackCharge = t1->charge() + t2->charge();
      
      double dR0 = 0.0;
      
      if (!applyChargeConstraint_ || trackCharge==0) {
        FreeTrajectoryState initialState2 = trajectoryStateTransform::initialFreeState(*s2.track(),&*magneticField);
        helixIntersector.calculate(initialState1, initialState2);
        if (helixIntersector.status())
          dR0 = helixIntersector.crossingPoint().perp();
      }

      int fitStatus = 0;
      MultiVertexFitterD fit;      
      if ( (!applyChargeConstraint_ || trackCharge==0) && (!useRhoMin_ || dR0 > rhoMin_) ) {
      
        // Vertex fit now, possibly with conversion constraint
        nFits++;
  
        fit.init(bfield); // Reset to the magnetic field from the event setup
        
        fit.addTrack(*trkPar1.pars(),*trkPar1.cMat(),1,s1.mass(),MultiVertexFitterD::VERTEX_1);
        fit.addTrack(*trkPar2.pars(),*trkPar2.cMat(),2,s2.mass(),MultiVertexFitterD::VERTEX_1);
        if (convConstraint3D_) {
          fit.conversion_3d(MultiVertexFitterD::VERTEX_1);
          //printf("applying 3d conversion constraint\n");
        }
        else if (convConstraint_) {
          fit.conversion_2d(MultiVertexFitterD::VERTEX_1);
          //printf("applying 2d conversion constraint\n");
        }
        //initialize primary vertex parameters in the fitter
        if (usePVertex_) {
          float vErr[3][3];
          for (UInt_t vi=0; vi<3; ++vi)
            for (UInt_t vj=0; vj<3; ++vj)
              vErr[vi][vj] = vertex->covariance(vi,vj);
              
          fit.setPrimaryVertex(vertex->x(),vertex->y(),vertex->z());
          fit.setPrimaryVertexError(vErr);
        }
        
        fitStatus = fit.fit();     
        
      }
        
      if (fitStatus) {
        DecayPart *d = new DecayPart(oPid_,DecayPart::Fast);
        
        // Update temporarily some of the quantities (prob, chi2, nDoF, mass, lxy, pt, fourMomentum)
        d->setProb(fit.prob());
        d->setChi2(fit.chisq());
        d->setNdof(fit.ndof());

        FourVector p4Fitted(0.,0.,0.,0.);
        p4Fitted += fit.getTrackP4(1);
        p4Fitted += fit.getTrackP4(2);
        d->setFourMomentum(p4Fitted);
        d->setPosition(fit.getVertex     (MultiVertexFitterD::VERTEX_1));
        d->setError   (fit.getErrorMatrix(MultiVertexFitterD::VERTEX_1));
        float mass, massErr;
        const int trksIds[2] = { 1, 2 };
        mass = fit.getMass(2,trksIds,massErr);
        
        ThreeVector p3Fitted(p4Fitted.px(), p4Fitted.py(), p4Fitted.pz());
        
        // Get decay length in xy plane
        float dl, dlErr;
        dl = fit.getDecayLength(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
               p3Fitted, dlErr);
               
        // Get Z decay length               
        float dlz, dlzErr;
        dlz = fit.getZDecayLength(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
               p3Fitted, dlzErr);
               
        // Get impact parameter               
        float dxy, dxyErr;
        dxy = fit.getImpactPar(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
               p3Fitted, dxyErr);

        BasePartPtr ptr1(hStables1,i);
        BasePartPtr ptr2(hStables2,j);       
        
        StableData c1(fit.getTrackP4(1).px(),fit.getTrackP4(1).py(), fit.getTrackP4(1).pz(), ptr1);
        StableData c2(fit.getTrackP4(2).px(),fit.getTrackP4(2).py(), fit.getTrackP4(2).pz(), ptr2);
        
        const ThreeVector vtxPos = fit.getVertex(MultiVertexFitterD::VERTEX_1);
        const ThreeVector trkMom1(fit.getTrackP4(1).px(),
                                  fit.getTrackP4(1).py(), 
                                  fit.getTrackP4(1).pz());
        const ThreeVector trkMom2(fit.getTrackP4(2).px(),
                                  fit.getTrackP4(2).py(), 
                                  fit.getTrackP4(2).pz());
        
        // Build corrected HitPattern for StableData, removing hits before the fit vertex
        if (useHitDropper_) {
          std::pair<reco::HitPattern,uint> hits1 = dropper->CorrectedHitsAOD(s1.track(), vtxPos, trkMom1, dlErr, dlzErr);
          std::pair<reco::HitPattern,uint> hits2 = dropper->CorrectedHitsAOD(s2.track(), vtxPos, trkMom2, dlErr, dlzErr);                 
   
          c1.SetHits(hits1.first);
          c2.SetHits(hits2.first);
          c1.SetHitsFilled();
          c2.SetHitsFilled();
          c1.SetNWrongHits(hits1.second);
          c2.SetNWrongHits(hits2.second);
          
          reco::HitPattern sharedHits = dropper->SharedHits(s1.track(),s2.track());
          d->setSharedHits(sharedHits);
        }
        
        d->addStableChild(c1);
        d->addStableChild(c2);
               
               
        d->setFittedMass     (mass);
        d->setFittedMassError(massErr);
        
        d->setLxy(dl);
        d->setLxyError(dlErr);
        d->setLxyToPv(dl);
        d->setLxyToPvError(dlErr);
        
        d->setLz(dlz);
        d->setLzError(dlzErr);
        d->setLzToPv(dlz);
        d->setLzToPvError(dlzErr);
        
        d->setDxy(dxy);
        d->setDxyError(dxyErr);
        d->setDxyToPv(dxy);
        d->setDxyToPvError(dxyErr);
        
        if (usePVertex_)
          d->setPrimaryVertex(vPtr);
        
        // Put the result into our collection
        pD->push_back(*d);

        delete d;
      }
    }
  }
  
  //printf("nConversionFits = %i\n",nFits);

  // Write the collection even if it is empty
  if (0) {
    cout << " ProducerConversions::produce - " << pD->size() << " entries collection created -"
         << " (Pid: " << oPid_ << ")\n";
  }
  evt.put(pD);
}

//define this as a plug-in
DEFINE_FWK_MODULE(ProducerConversions);
Revision:	1.25
Committed:	Fri Mar 30 01:08:39 2012 UTC (13 years, 1 month ago) by paus
Content type:	text/plain
Branch:	MAIN
CVS Tags:	Mit_032, Mit_031, Mit_030, Mit_029c, Mit_029b, Mit_030_pre1, Mit_029a, Mit_029, Mit_029_pre1, Mit_028a, Mit_028, Mit_027a, Mit_027, Mit_026, HEAD
Changes since 1.24:	+4 -5 lines
Log Message:	Initial 5 version.
#	User	Rev	Content
1	paus	1.25	// $Id: ProducerConversions.cc,v 1.24 2010/06/08 20:17:30 bendavid Exp $
2	bendavid	1.1
3	loizides	1.5	#include "MitEdm/Producers/interface/ProducerConversions.h"
4	bendavid	1.1	#include "DataFormats/Common/interface/Handle.h"
5			#include "DataFormats/TrackReco/interface/Track.h"
6			#include "DataFormats/TrackReco/interface/TrackFwd.h"
7	bendavid	1.6	#include "DataFormats/VertexReco/interface/Vertex.h"
8			#include "DataFormats/VertexReco/interface/VertexFwd.h"
9	bendavid	1.18	#include "MagneticField/Engine/interface/MagneticField.h"
10			#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"
11	bendavid	1.19	#include "TrackingTools/TrajectoryState/interface/TrajectoryStateTransform.h"
12			#include "TrackingTools/PatternTools/interface/ClosestApproachInRPhi.h"
13	bendavid	1.7	#include "MitEdm/Producers/interface/HitDropperRecord.h"
14			#include "MitEdm/Producers/interface/HitDropper.h"
15	bendavid	1.1	#include "MitEdm/DataFormats/interface/Types.h"
16	loizides	1.5	#include "MitEdm/DataFormats/interface/Collections.h"
17	bendavid	1.1	#include "MitEdm/DataFormats/interface/DecayPart.h"
18			#include "MitEdm/DataFormats/interface/StablePart.h"
19	bendavid	1.6	#include "MitEdm/DataFormats/interface/StableData.h"
20	bendavid	1.1	#include "MitEdm/VertexFitInterface/interface/MvfInterface.h"
21	bendavid	1.23	#include "MitEdm/VertexFitInterface/interface/TrackParameters.h"
22	bendavid	1.20	#include <TMath.h>
23	bendavid	1.1
24			using namespace std;
25			using namespace edm;
26			using namespace reco;
27			using namespace mitedm;
28			using namespace mithep;
29
30			//--------------------------------------------------------------------------------------------------
31			ProducerConversions::ProducerConversions(const ParameterSet& cfg) :
32	paus	1.11	BaseCandProducer (cfg),
33			iStables1_ (cfg.getUntrackedParameter<string>("iStables1","")),
34			iStables2_ (cfg.getUntrackedParameter<string>("iStables2","")),
35			iPVertexes_ (cfg.getUntrackedParameter<string>("iPVertexes","offlinePrimaryVerticesWithBS")),
36			usePVertex_ (cfg.getUntrackedParameter<bool> ("usePVertex",true)),
37			convConstraint_ (cfg.getUntrackedParameter<bool> ("convConstraint",false)),
38			convConstraint3D_(cfg.getUntrackedParameter<bool> ("convConstraint3D",true)),
39	bendavid	1.15	rhoMin_ (cfg.getUntrackedParameter<double>("rhoMin",0.0)),
40	bendavid	1.23	useRhoMin_ (cfg.getUntrackedParameter<bool> ("useRhoMin",true)),
41	bendavid	1.20	useHitDropper_ (cfg.getUntrackedParameter<bool> ("useHitDropper",true)),
42	bendavid	1.21	applyChargeConstraint_(cfg.getUntrackedParameter<bool> ("applyChargeConstraint",false))
43	bendavid	1.1	{
44	loizides	1.5	// Constructor.
45
46	bendavid	1.1	produces<DecayPartCol>();
47			}
48
49			//--------------------------------------------------------------------------------------------------
50			ProducerConversions::~ProducerConversions()
51			{
52	loizides	1.5	// Destructor.
53	bendavid	1.1	}
54
55			//--------------------------------------------------------------------------------------------------
56			void ProducerConversions::produce(Event &evt, const EventSetup &setup)
57			{
58	loizides	1.5	// Produce our DecayPartCol.
59
60	bendavid	1.1	// First input collection
61			Handle<StablePartCol> hStables1;
62	bendavid	1.9	if (!GetProduct(iStables1_, hStables1, evt)) {
63			printf("Stable collection 1 not found in ProducerConversions\n");
64	bendavid	1.1	return;
65	bendavid	1.9	}
66	bendavid	1.1	const StablePartCol *pS1 = hStables1.product();
67			// Second input collection
68			Handle<StablePartCol> hStables2;
69	bendavid	1.9	if (!GetProduct(iStables2_, hStables2, evt)) {
70			printf("Stable collection 2 not found in ProducerConversions\n");
71	bendavid	1.1	return;
72	bendavid	1.9	}
73	bendavid	1.1	const StablePartCol *pS2 = hStables2.product();
74
75	bendavid	1.6	const reco::Vertex *vertex = 0;
76			mitedm::VertexPtr vPtr;
77			if (usePVertex_) {
78			// Primary vertex collection
79			Handle<reco::VertexCollection> hVertexes;
80			if (!GetProduct(iPVertexes_, hVertexes, evt))
81			return;
82			const reco::VertexCollection *pV = hVertexes.product();
83
84			//Choose the primary vertex with the largest number of tracks
85			UInt_t maxTracks=0;
86			for (UInt_t i=0; i<pV->size(); ++i) {
87			const reco::Vertex &v = pV->at(i);
88			UInt_t nTracks = v.tracksSize();
89			if (nTracks >= maxTracks) {
90			maxTracks = nTracks;
91			vertex = &v;
92			vPtr = mitedm::VertexPtr(hVertexes,i);
93			}
94			}
95			}
96	bendavid	1.7
97	paus	1.11	// Get hit dropper
98	bendavid	1.7	ESHandle<HitDropper> hDropper;
99			setup.get<HitDropperRecord>().get("HitDropper",hDropper);
100			const HitDropper *dropper = hDropper.product();
101	bendavid	1.6
102	bendavid	1.18	//Get Magnetic Field from event setup, taking value at (0,0,0)
103			edm::ESHandle<MagneticField> magneticField;
104			setup.get<IdealMagneticFieldRecord>().get(magneticField);
105			const double bfield = magneticField->inTesla(GlobalPoint(0.,0.,0.)).z();
106
107	bendavid	1.23	edm::ESHandle<TransientTrackBuilder> hTransientTrackBuilder;
108			setup.get<TransientTrackRecord>().get("TransientTrackBuilder",hTransientTrackBuilder);
109			const TransientTrackBuilder *transientTrackBuilder = hTransientTrackBuilder.product();
110
111			//construct intermediate collection of TrackParameters in mvf format for vertex fit
112			std::vector<TrackParameters> trkPars1;
113			for (UInt_t i = 0; i<pS1->size(); ++i) {
114			const reco::Track *t = pS1->at(i).track();
115			const reco::TransientTrack ttrk = transientTrackBuilder->build(t);
116			TrackParameters cmsTrk(ttrk);
117			TrackParameters mvfTrk = cmsTrk.mvfTrack();
118			trkPars1.push_back(mvfTrk);
119			}
120
121	bendavid	1.24	bool sameCollection = iStables1_ == iStables2_;
122
123	bendavid	1.23	std::vector<TrackParameters> trkPars2;
124	bendavid	1.24	if (sameCollection)
125	bendavid	1.23	trkPars2 = trkPars1;
126			else for (UInt_t i = 0; i<pS2->size(); ++i) {
127			const reco::Track *t = pS2->at(i).track();
128			const reco::TransientTrack ttrk = transientTrackBuilder->build(t);
129			TrackParameters cmsTrk(ttrk);
130			TrackParameters mvfTrk = cmsTrk.mvfTrack();
131			trkPars2.push_back(mvfTrk);
132			}
133
134
135	bendavid	1.1	// Create the output collection
136			auto_ptr<DecayPartCol> pD(new DecayPartCol());
137	bendavid	1.6
138	bendavid	1.19	ClosestApproachInRPhi helixIntersector;
139
140	bendavid	1.20	int nFits = 0;
141
142			//printf("S1 size = %i\n", pS1->size());
143
144	bendavid	1.24	std::set<std::pair<edm::Ptr<reco::Track>,edm::Ptr<reco::Track> > > pairSet;
145	bendavid	1.1	// Simple double loop
146			for (UInt_t i = 0; i<pS1->size(); ++i) {
147			const StablePart &s1 = pS1->at(i);
148
149	bendavid	1.20	const reco::Track * t1 = s1.track();
150	bendavid	1.23	const TrackParameters &trkPar1 = trkPars1.at(i);
151
152	bendavid	1.1	UInt_t j;
153	bendavid	1.24	if (sameCollection)
154	bendavid	1.1	j = i+1;
155			else
156			j = 0;
157
158	paus	1.25
159			FreeTrajectoryState initialState1 = trajectoryStateTransform::initialFreeState(s1.track(),&magneticField);
160	bendavid	1.19
161	bendavid	1.1	for (; j<pS2->size(); ++j) {
162			const StablePart &s2 = pS2->at(j);
163	bendavid	1.24
164			if (!sameCollection) {
165			std::pair<edm::Ptr<reco::Track>,edm::Ptr<reco::Track> > pair1(s1.trackPtr(),s2.trackPtr());
166			std::pair<edm::Ptr<reco::Track>,edm::Ptr<reco::Track> > pair2(s2.trackPtr(),s1.trackPtr());
167			if (pairSet.find(pair1)!=pairSet.end() \|\| pairSet.find(pair2)!=pairSet.end()) {
168			continue;
169			}
170
171			pairSet.insert(pair1);
172			pairSet.insert(pair2);
173			}
174
175	bendavid	1.21	//Do fast helix fit to check if there's any hope
176	bendavid	1.13	const reco::Track * t2 = s2.track();
177	bendavid	1.23	const TrackParameters &trkPar2 = trkPars2.at(j);
178	bendavid	1.13
179			int trackCharge = t1->charge() + t2->charge();
180	bendavid	1.19
181	bendavid	1.13	double dR0 = 0.0;
182
183	bendavid	1.20	if (!applyChargeConstraint_ \|\| trackCharge==0) {
184	paus	1.25	FreeTrajectoryState initialState2 = trajectoryStateTransform::initialFreeState(s2.track(),&magneticField);
185	bendavid	1.19	helixIntersector.calculate(initialState1, initialState2);
186			if (helixIntersector.status())
187			dR0 = helixIntersector.crossingPoint().perp();
188	bendavid	1.3	}
189	bendavid	1.13
190			int fitStatus = 0;
191			MultiVertexFitterD fit;
192	bendavid	1.23	if ( (!applyChargeConstraint_ \|\| trackCharge==0) && (!useRhoMin_ \|\| dR0 > rhoMin_) ) {
193	bendavid	1.13
194			// Vertex fit now, possibly with conversion constraint
195	bendavid	1.20	nFits++;
196	bendavid	1.13
197	bendavid	1.18	fit.init(bfield); // Reset to the magnetic field from the event setup
198	bendavid	1.23
199			fit.addTrack(trkPar1.pars(),trkPar1.cMat(),1,s1.mass(),MultiVertexFitterD::VERTEX_1);
200			fit.addTrack(trkPar2.pars(),trkPar2.cMat(),2,s2.mass(),MultiVertexFitterD::VERTEX_1);
201	bendavid	1.13	if (convConstraint3D_) {
202			fit.conversion_3d(MultiVertexFitterD::VERTEX_1);
203			//printf("applying 3d conversion constraint\n");
204			}
205			else if (convConstraint_) {
206			fit.conversion_2d(MultiVertexFitterD::VERTEX_1);
207			//printf("applying 2d conversion constraint\n");
208			}
209			//initialize primary vertex parameters in the fitter
210			if (usePVertex_) {
211			float vErr[3][3];
212			for (UInt_t vi=0; vi<3; ++vi)
213			for (UInt_t vj=0; vj<3; ++vj)
214			vErr[vi][vj] = vertex->covariance(vi,vj);
215
216			fit.setPrimaryVertex(vertex->x(),vertex->y(),vertex->z());
217			fit.setPrimaryVertexError(vErr);
218			}
219
220			fitStatus = fit.fit();
221	bendavid	1.23
222	bendavid	1.6	}
223
224			if (fitStatus) {
225	bendavid	1.3	DecayPart *d = new DecayPart(oPid_,DecayPart::Fast);
226	bendavid	1.1
227	bendavid	1.3	// Update temporarily some of the quantities (prob, chi2, nDoF, mass, lxy, pt, fourMomentum)
228			d->setProb(fit.prob());
229			d->setChi2(fit.chisq());
230			d->setNdof(fit.ndof());
231
232			FourVector p4Fitted(0.,0.,0.,0.);
233			p4Fitted += fit.getTrackP4(1);
234			p4Fitted += fit.getTrackP4(2);
235			d->setFourMomentum(p4Fitted);
236	paus	1.12	d->setPosition(fit.getVertex (MultiVertexFitterD::VERTEX_1));
237			d->setError (fit.getErrorMatrix(MultiVertexFitterD::VERTEX_1));
238	bendavid	1.3	float mass, massErr;
239			const int trksIds[2] = { 1, 2 };
240			mass = fit.getMass(2,trksIds,massErr);
241
242	bendavid	1.6	ThreeVector p3Fitted(p4Fitted.px(), p4Fitted.py(), p4Fitted.pz());
243
244	paus	1.11	// Get decay length in xy plane
245	bendavid	1.6	float dl, dlErr;
246	paus	1.12	dl = fit.getDecayLength(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
247	bendavid	1.6	p3Fitted, dlErr);
248
249	paus	1.11	// Get Z decay length
250	bendavid	1.6	float dlz, dlzErr;
251	paus	1.12	dlz = fit.getZDecayLength(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
252	bendavid	1.6	p3Fitted, dlzErr);
253
254	paus	1.11	// Get impact parameter
255	bendavid	1.6	float dxy, dxyErr;
256	paus	1.12	dxy = fit.getImpactPar(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
257	bendavid	1.6	p3Fitted, dxyErr);
258	bendavid	1.1
259	bendavid	1.8	BasePartPtr ptr1(hStables1,i);
260			BasePartPtr ptr2(hStables2,j);
261
262			StableData c1(fit.getTrackP4(1).px(),fit.getTrackP4(1).py(), fit.getTrackP4(1).pz(), ptr1);
263			StableData c2(fit.getTrackP4(2).px(),fit.getTrackP4(2).py(), fit.getTrackP4(2).pz(), ptr2);
264
265	paus	1.12	const ThreeVector vtxPos = fit.getVertex(MultiVertexFitterD::VERTEX_1);
266	loizides	1.14	const ThreeVector trkMom1(fit.getTrackP4(1).px(),
267			fit.getTrackP4(1).py(),
268			fit.getTrackP4(1).pz());
269			const ThreeVector trkMom2(fit.getTrackP4(2).px(),
270			fit.getTrackP4(2).py(),
271			fit.getTrackP4(2).pz());
272	bendavid	1.8
273	paus	1.11	// Build corrected HitPattern for StableData, removing hits before the fit vertex
274	bendavid	1.15	if (useHitDropper_) {
275	bendavid	1.24	std::pair<reco::HitPattern,uint> hits1 = dropper->CorrectedHitsAOD(s1.track(), vtxPos, trkMom1, dlErr, dlzErr);
276			std::pair<reco::HitPattern,uint> hits2 = dropper->CorrectedHitsAOD(s2.track(), vtxPos, trkMom2, dlErr, dlzErr);
277	bendavid	1.17
278	bendavid	1.24	c1.SetHits(hits1.first);
279			c2.SetHits(hits2.first);
280	bendavid	1.15	c1.SetHitsFilled();
281			c2.SetHitsFilled();
282	bendavid	1.24	c1.SetNWrongHits(hits1.second);
283			c2.SetNWrongHits(hits2.second);
284	bendavid	1.22
285			reco::HitPattern sharedHits = dropper->SharedHits(s1.track(),s2.track());
286			d->setSharedHits(sharedHits);
287	bendavid	1.15	}
288	bendavid	1.8
289			d->addStableChild(c1);
290			d->addStableChild(c2);
291
292
293	bendavid	1.6	d->setFittedMass (mass);
294			d->setFittedMassError(massErr);
295
296			d->setLxy(dl);
297			d->setLxyError(dlErr);
298			d->setLxyToPv(dl);
299			d->setLxyToPvError(dlErr);
300
301			d->setLz(dlz);
302			d->setLzError(dlzErr);
303			d->setLzToPv(dlz);
304			d->setLzToPvError(dlzErr);
305
306			d->setDxy(dxy);
307			d->setDxyError(dxyErr);
308			d->setDxyToPv(dxy);
309			d->setDxyToPvError(dxyErr);
310
311			if (usePVertex_)
312			d->setPrimaryVertex(vPtr);
313
314			// Put the result into our collection
315	bendavid	1.13	pD->push_back(*d);
316	loizides	1.5
317	bendavid	1.1	delete d;
318			}
319			}
320			}
321	bendavid	1.20
322			//printf("nConversionFits = %i\n",nFits);
323	bendavid	1.1
324			// Write the collection even if it is empty
325	loizides	1.5	if (0) {
326			cout << " ProducerConversions::produce - " << pD->size() << " entries collection created -"
327			<< " (Pid: " << oPid_ << ")\n";
328			}
329	bendavid	1.1	evt.put(pD);
330			}
331
332			//define this as a plug-in
333			DEFINE_FWK_MODULE(ProducerConversions);