Producers/src/ProducerConversions.cc

// $Id: ProducerConversions.cc,v 1.17 2009/10/04 12:49:26 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 "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/HisInterface.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)),
  useHitDropper_   (cfg.getUntrackedParameter<bool>  ("useHitDropper",true))
{
  // 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();
  
  // Create the output collection
  auto_ptr<DecayPartCol> pD(new DecayPartCol());
  
  // Simple double loop
  for (UInt_t i = 0; i<pS1->size(); ++i) {
    const StablePart &s1 =  pS1->at(i);
    
    UInt_t j;
    if (iStables1_ == iStables2_)
      j = i+1; 
    else
      j = 0;
    
    for (; j<pS2->size(); ++j) {
      const StablePart &s2 = pS2->at(j);

            //Do fast helix fit to check if there's any hope
      const reco::Track * t1 = s1.track();
      const reco::Track * t2 = s2.track();
      
      int trackCharge = t1->charge() + t2->charge();
      double dR0 = 0.0;
      
      if (trackCharge==0) { 
        HisInterface            hisInt(t1,t2);
        const mithep::HelixIntersector *his = hisInt.hISector();
        dR0 = sqrt(his->IntersectionI(0).Location().X()*his->IntersectionI(0).Location().X()+
                  his->IntersectionI(0).Location().Y()*his->IntersectionI(0).Location().Y());
      }

                 
      int fitStatus = 0;
      MultiVertexFitterD fit;      
      if (trackCharge==0 && dR0 > rhoMin_) {
      
        // Vertex fit now, possibly with conversion constraint
  
        fit.init(bfield); // Reset to the magnetic field from the event setup
        MvfInterface fitInt(&fit);
        fitInt.addTrack(s1.track(),1,s1.mass(),MultiVertexFitterD::VERTEX_1);
        fitInt.addTrack(s2.track(),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_) {
          reco::HitPattern hits1 = dropper->CorrectedHitsAOD(s1.track(), vtxPos, trkMom1, dlErr, dlzErr);
          reco::HitPattern hits2 = dropper->CorrectedHitsAOD(s2.track(), vtxPos, trkMom2, dlErr, dlzErr);                 
   
          c1.SetHits(hits1);
          c2.SetHits(hits2);
          c1.SetHitsFilled();
          c2.SetHitsFilled();
        }
        
        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;
      }
    }
  }

  // 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:	1.18
Committed:	Mon Nov 2 22:56:18 2009 UTC (15 years, 6 months ago) by bendavid
Content type:	text/plain
Branch:	MAIN
CVS Tags:	Mit_012b, Mit_012a, Mit_012
Changes since 1.17:	+9 -2 lines
Log Message:	Use magnetic field from event setup instead of hardcoded 3.8T
#	User	Rev	Content
1	bendavid	1.18	// $Id: ProducerConversions.cc,v 1.17 2009/10/04 12:49:26 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	1.7	#include "MitEdm/Producers/interface/HitDropperRecord.h"
12			#include "MitEdm/Producers/interface/HitDropper.h"
13	bendavid	1.1	#include "MitEdm/DataFormats/interface/Types.h"
14	loizides	1.5	#include "MitEdm/DataFormats/interface/Collections.h"
15	bendavid	1.1	#include "MitEdm/DataFormats/interface/DecayPart.h"
16			#include "MitEdm/DataFormats/interface/StablePart.h"
17	bendavid	1.6	#include "MitEdm/DataFormats/interface/StableData.h"
18	bendavid	1.1	#include "MitEdm/VertexFitInterface/interface/MvfInterface.h"
19	bendavid	1.13	#include "MitEdm/VertexFitInterface/interface/HisInterface.h"
20	bendavid	1.1
21			using namespace std;
22			using namespace edm;
23			using namespace reco;
24			using namespace mitedm;
25			using namespace mithep;
26
27			//--------------------------------------------------------------------------------------------------
28			ProducerConversions::ProducerConversions(const ParameterSet& cfg) :
29	paus	1.11	BaseCandProducer (cfg),
30			iStables1_ (cfg.getUntrackedParameter<string>("iStables1","")),
31			iStables2_ (cfg.getUntrackedParameter<string>("iStables2","")),
32			iPVertexes_ (cfg.getUntrackedParameter<string>("iPVertexes","offlinePrimaryVerticesWithBS")),
33			usePVertex_ (cfg.getUntrackedParameter<bool> ("usePVertex",true)),
34			convConstraint_ (cfg.getUntrackedParameter<bool> ("convConstraint",false)),
35			convConstraint3D_(cfg.getUntrackedParameter<bool> ("convConstraint3D",true)),
36	bendavid	1.15	rhoMin_ (cfg.getUntrackedParameter<double>("rhoMin",0.0)),
37	loizides	1.16	useHitDropper_ (cfg.getUntrackedParameter<bool> ("useHitDropper",true))
38	bendavid	1.1	{
39	loizides	1.5	// Constructor.
40
41	bendavid	1.1	produces<DecayPartCol>();
42			}
43
44			//--------------------------------------------------------------------------------------------------
45			ProducerConversions::~ProducerConversions()
46			{
47	loizides	1.5	// Destructor.
48	bendavid	1.1	}
49
50			//--------------------------------------------------------------------------------------------------
51			void ProducerConversions::produce(Event &evt, const EventSetup &setup)
52			{
53	loizides	1.5	// Produce our DecayPartCol.
54
55	bendavid	1.1	// First input collection
56			Handle<StablePartCol> hStables1;
57	bendavid	1.9	if (!GetProduct(iStables1_, hStables1, evt)) {
58			printf("Stable collection 1 not found in ProducerConversions\n");
59	bendavid	1.1	return;
60	bendavid	1.9	}
61	bendavid	1.1	const StablePartCol *pS1 = hStables1.product();
62			// Second input collection
63			Handle<StablePartCol> hStables2;
64	bendavid	1.9	if (!GetProduct(iStables2_, hStables2, evt)) {
65			printf("Stable collection 2 not found in ProducerConversions\n");
66	bendavid	1.1	return;
67	bendavid	1.9	}
68	bendavid	1.1	const StablePartCol *pS2 = hStables2.product();
69
70	bendavid	1.6	const reco::Vertex *vertex = 0;
71			mitedm::VertexPtr vPtr;
72			if (usePVertex_) {
73			// Primary vertex collection
74			Handle<reco::VertexCollection> hVertexes;
75			if (!GetProduct(iPVertexes_, hVertexes, evt))
76			return;
77			const reco::VertexCollection *pV = hVertexes.product();
78
79			//Choose the primary vertex with the largest number of tracks
80			UInt_t maxTracks=0;
81			for (UInt_t i=0; i<pV->size(); ++i) {
82			const reco::Vertex &v = pV->at(i);
83			UInt_t nTracks = v.tracksSize();
84			if (nTracks >= maxTracks) {
85			maxTracks = nTracks;
86			vertex = &v;
87			vPtr = mitedm::VertexPtr(hVertexes,i);
88			}
89			}
90			}
91	bendavid	1.7
92	paus	1.11	// Get hit dropper
93	bendavid	1.7	ESHandle<HitDropper> hDropper;
94			setup.get<HitDropperRecord>().get("HitDropper",hDropper);
95			const HitDropper *dropper = hDropper.product();
96	bendavid	1.6
97	bendavid	1.18	//Get Magnetic Field from event setup, taking value at (0,0,0)
98			edm::ESHandle<MagneticField> magneticField;
99			setup.get<IdealMagneticFieldRecord>().get(magneticField);
100			const double bfield = magneticField->inTesla(GlobalPoint(0.,0.,0.)).z();
101
102	bendavid	1.1	// Create the output collection
103			auto_ptr<DecayPartCol> pD(new DecayPartCol());
104	bendavid	1.6
105	bendavid	1.1	// Simple double loop
106			for (UInt_t i = 0; i<pS1->size(); ++i) {
107			const StablePart &s1 = pS1->at(i);
108
109			UInt_t j;
110			if (iStables1_ == iStables2_)
111			j = i+1;
112			else
113			j = 0;
114
115			for (; j<pS2->size(); ++j) {
116			const StablePart &s2 = pS2->at(j);
117
118	bendavid	1.13	//Do fast helix fit to check if there's any hope
119			const reco::Track * t1 = s1.track();
120			const reco::Track * t2 = s2.track();
121
122			int trackCharge = t1->charge() + t2->charge();
123			double dR0 = 0.0;
124
125			if (trackCharge==0) {
126			HisInterface hisInt(t1,t2);
127			const mithep::HelixIntersector *his = hisInt.hISector();
128			dR0 = sqrt(his->IntersectionI(0).Location().X()*his->IntersectionI(0).Location().X()+
129			his->IntersectionI(0).Location().Y()*his->IntersectionI(0).Location().Y());
130	bendavid	1.3	}
131	bendavid	1.13
132
133			int fitStatus = 0;
134			MultiVertexFitterD fit;
135			if (trackCharge==0 && dR0 > rhoMin_) {
136
137			// Vertex fit now, possibly with conversion constraint
138
139	bendavid	1.18	fit.init(bfield); // Reset to the magnetic field from the event setup
140	bendavid	1.13	MvfInterface fitInt(&fit);
141			fitInt.addTrack(s1.track(),1,s1.mass(),MultiVertexFitterD::VERTEX_1);
142			fitInt.addTrack(s2.track(),2,s2.mass(),MultiVertexFitterD::VERTEX_1);
143			if (convConstraint3D_) {
144			fit.conversion_3d(MultiVertexFitterD::VERTEX_1);
145			//printf("applying 3d conversion constraint\n");
146			}
147			else if (convConstraint_) {
148			fit.conversion_2d(MultiVertexFitterD::VERTEX_1);
149			//printf("applying 2d conversion constraint\n");
150			}
151			//initialize primary vertex parameters in the fitter
152			if (usePVertex_) {
153			float vErr[3][3];
154			for (UInt_t vi=0; vi<3; ++vi)
155			for (UInt_t vj=0; vj<3; ++vj)
156			vErr[vi][vj] = vertex->covariance(vi,vj);
157
158			fit.setPrimaryVertex(vertex->x(),vertex->y(),vertex->z());
159			fit.setPrimaryVertexError(vErr);
160			}
161
162			fitStatus = fit.fit();
163	bendavid	1.6	}
164
165			if (fitStatus) {
166	bendavid	1.3	DecayPart *d = new DecayPart(oPid_,DecayPart::Fast);
167	bendavid	1.1
168	bendavid	1.3	// Update temporarily some of the quantities (prob, chi2, nDoF, mass, lxy, pt, fourMomentum)
169			d->setProb(fit.prob());
170			d->setChi2(fit.chisq());
171			d->setNdof(fit.ndof());
172
173			FourVector p4Fitted(0.,0.,0.,0.);
174			p4Fitted += fit.getTrackP4(1);
175			p4Fitted += fit.getTrackP4(2);
176			d->setFourMomentum(p4Fitted);
177	paus	1.12	d->setPosition(fit.getVertex (MultiVertexFitterD::VERTEX_1));
178			d->setError (fit.getErrorMatrix(MultiVertexFitterD::VERTEX_1));
179	bendavid	1.3	float mass, massErr;
180			const int trksIds[2] = { 1, 2 };
181			mass = fit.getMass(2,trksIds,massErr);
182
183	bendavid	1.6	ThreeVector p3Fitted(p4Fitted.px(), p4Fitted.py(), p4Fitted.pz());
184
185	paus	1.11	// Get decay length in xy plane
186	bendavid	1.6	float dl, dlErr;
187	paus	1.12	dl = fit.getDecayLength(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
188	bendavid	1.6	p3Fitted, dlErr);
189
190	paus	1.11	// Get Z decay length
191	bendavid	1.6	float dlz, dlzErr;
192	paus	1.12	dlz = fit.getZDecayLength(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
193	bendavid	1.6	p3Fitted, dlzErr);
194
195	paus	1.11	// Get impact parameter
196	bendavid	1.6	float dxy, dxyErr;
197	paus	1.12	dxy = fit.getImpactPar(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
198	bendavid	1.6	p3Fitted, dxyErr);
199	bendavid	1.1
200	bendavid	1.8	BasePartPtr ptr1(hStables1,i);
201			BasePartPtr ptr2(hStables2,j);
202
203			StableData c1(fit.getTrackP4(1).px(),fit.getTrackP4(1).py(), fit.getTrackP4(1).pz(), ptr1);
204			StableData c2(fit.getTrackP4(2).px(),fit.getTrackP4(2).py(), fit.getTrackP4(2).pz(), ptr2);
205
206	paus	1.12	const ThreeVector vtxPos = fit.getVertex(MultiVertexFitterD::VERTEX_1);
207	loizides	1.14	const ThreeVector trkMom1(fit.getTrackP4(1).px(),
208			fit.getTrackP4(1).py(),
209			fit.getTrackP4(1).pz());
210			const ThreeVector trkMom2(fit.getTrackP4(2).px(),
211			fit.getTrackP4(2).py(),
212			fit.getTrackP4(2).pz());
213	bendavid	1.8
214	paus	1.11	// Build corrected HitPattern for StableData, removing hits before the fit vertex
215	bendavid	1.15	if (useHitDropper_) {
216	bendavid	1.17	reco::HitPattern hits1 = dropper->CorrectedHitsAOD(s1.track(), vtxPos, trkMom1, dlErr, dlzErr);
217			reco::HitPattern hits2 = dropper->CorrectedHitsAOD(s2.track(), vtxPos, trkMom2, dlErr, dlzErr);
218
219	bendavid	1.15	c1.SetHits(hits1);
220			c2.SetHits(hits2);
221			c1.SetHitsFilled();
222			c2.SetHitsFilled();
223			}
224	bendavid	1.8
225			d->addStableChild(c1);
226			d->addStableChild(c2);
227
228
229	bendavid	1.6	d->setFittedMass (mass);
230			d->setFittedMassError(massErr);
231
232			d->setLxy(dl);
233			d->setLxyError(dlErr);
234			d->setLxyToPv(dl);
235			d->setLxyToPvError(dlErr);
236
237			d->setLz(dlz);
238			d->setLzError(dlzErr);
239			d->setLzToPv(dlz);
240			d->setLzToPvError(dlzErr);
241
242			d->setDxy(dxy);
243			d->setDxyError(dxyErr);
244			d->setDxyToPv(dxy);
245			d->setDxyToPvError(dxyErr);
246
247			if (usePVertex_)
248			d->setPrimaryVertex(vPtr);
249
250			// Put the result into our collection
251	bendavid	1.13	pD->push_back(*d);
252	loizides	1.5
253	bendavid	1.1	delete d;
254			}
255			}
256			}
257
258			// Write the collection even if it is empty
259	loizides	1.5	if (0) {
260			cout << " ProducerConversions::produce - " << pD->size() << " entries collection created -"
261			<< " (Pid: " << oPid_ << ")\n";
262			}
263	bendavid	1.1	evt.put(pD);
264			}
265
266			//define this as a plug-in
267			DEFINE_FWK_MODULE(ProducerConversions);