Producers/src/ProducerV2SS.cc

// $Id: ProducerV2SS.cc,v 1.14 2009/10/04 12:49:26 bendavid Exp $

#include "DataFormats/Common/interface/Handle.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackReco/interface/TrackFwd.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"
#include "MitEdm/Producers/interface/ProducerV2SS.h"

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

//--------------------------------------------------------------------------------------------------
ProducerV2SS::ProducerV2SS(const ParameterSet& cfg) :
  ProducerD2SS(cfg),
  rhoMin_     (cfg.getUntrackedParameter<double>("minRadius",   0.0)),
  massMin_    (cfg.getUntrackedParameter<double>("minMass",     0.0)),
  massMax_    (cfg.getUntrackedParameter<double>("maxMass",     3.0)),
  dZMax_      (cfg.getUntrackedParameter<double>("maxZDistance",5.0)),
  useHitDropper_(cfg.getUntrackedParameter<bool>("useHitDropper",true))
{
  // Constructor.
}

//--------------------------------------------------------------------------------------------------
ProducerV2SS::~ProducerV2SS()
{
  // Destructor.
}

//--------------------------------------------------------------------------------------------------
void ProducerV2SS::produce(Event &evt, const EventSetup &setup)
{
  // Produce the output collection.

  auto_ptr<DecayPartCol> pD(new DecayPartCol());

  // First input collection
  Handle<StablePartCol> hStables1;
  Handle<StablePartCol> hStables2;
  if (!GetProduct(iStables1_, hStables1, evt) ) {
    cout << "Couldn't get in collection in Producer V2SS" << endl;
    evt.put(pD);
    return;  
  }
  const StablePartCol *pS1 = hStables1.product();

  // Second input collection
  if(!GetProduct(iStables2_, hStables2, evt)) {
    cout << "Couldn't get in collection in Producer V2SS" << endl;
    evt.put(pD);
    return;  
  }
  const StablePartCol *pS2 = hStables2.product();
  
  //get hit dropper
  ESHandle<HitDropper> hDropper;
  const HitDropper *dropper = 0;
  if (useHitDropper_) {
    setup.get<HitDropperRecord>().get("HitDropper",hDropper);
    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();

  // -----------------------------------------------------------------------------------------------
  // Simple double loop
  // -----------------------------------------------------------------------------------------------
  if (0)
    cout << "Starting V finder loop" << endl;

  //sX_y: X= pion or proton collection.  
  //i, j = 2 loop particles. 
  //ex.: s1_i and s2_i are same particle as pion and proton
  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);

      if(s1.charge() + s2.charge() != 0) continue;

      // do fast helix fit to check if there's any hope
      const reco::Track * t1 = s1.track();
      const reco::Track * t2 = s2.track();
      HisInterface            hisInt(t1,t2);
      const mithep::HelixIntersector *his = hisInt.hISector();
      double dZ0 = -999;
      double dR0 = -999;
      dZ0 = his->IntersectionI(0).DeltaZ();
      dR0 = sqrt(his->IntersectionI(0).Location().X()*his->IntersectionI(0).Location().X()+
                 his->IntersectionI(0).Location().Y()*his->IntersectionI(0).Location().Y());

      TVector3     v1, v2;
      v1 = his->IntersectionI(0).TrackParamsI(0).Momentum();
      v2 = his->IntersectionI(0).TrackParamsI(1).Momentum();

      double e1 = sqrt(v1.Mag()*v1.Mag() +s1.mass()*s1.mass());
      double x1 = v1.X();
      double y1 = v1.Y();
      double z1 = v1.Z();

      double e2 = sqrt(v2.Mag()*v2.Mag()+s2.mass()*s2.mass());
      double x2 = v2.X();
      double y2 = v2.Y();
      double z2 = v2.Z();

      FourVector sum(x1+x2, y1+y2, z1+z2, e1+e2);

      double mass0 = sqrt(sum.M2());

      // Basic cuts on helix intersection
      if(mass0 > massMax_ || mass0<massMin_ || fabs(dZ0) > dZMax_ || dR0 < rhoMin_) continue;

      // -------------------------------------------------------------------------------------------
      // Do vertex fit for all pairs
      // -------------------------------------------------------------------------------------------
      mithep::MultiVertexFitterD fit;
      fit.init(bfield); // Reset to the magnetic field from the event setup
      fit.setChisqMax(100);
      MvfInterface fitInt(&fit);
      fitInt.addTrack(s1.track(),1,s1.mass(),mithep::MultiVertexFitterD::VERTEX_1);
      fitInt.addTrack(s2.track(),2,s2.mass(),mithep::MultiVertexFitterD::VERTEX_1);


      if (fit.fit()){

        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);

        // put the result into our collection
        pD->push_back(*d);
        delete d;
      }  //done processing fit
    } //end j loop
  } //end i loop

  // -----------------------------------------------------------------------------------------------
  // Write the collection even if it is empty
  // -----------------------------------------------------------------------------------------------
  if (0)
    cout << " V2SS::produce - " << pD->size() << " entries collection created -"
         << " (Pid: " << oPid_ << ")\n";
  evt.put(pD);
}

// define this as a plug-in
DEFINE_FWK_MODULE(ProducerV2SS);
Revision:	1.15
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 1.14:	+9 -2 lines
Log Message:	Use magnetic field from event setup instead of hardcoded 3.8T
#	User	Rev	Content
1	bendavid	1.15	// $Id: ProducerV2SS.cc,v 1.14 2009/10/04 12:49:26 bendavid Exp $
2	loizides	1.7
3	mrudolph	1.3	#include "DataFormats/Common/interface/Handle.h"
4			#include "DataFormats/TrackReco/interface/Track.h"
5			#include "DataFormats/TrackReco/interface/TrackFwd.h"
6	bendavid	1.15	#include "MagneticField/Engine/interface/MagneticField.h"
7			#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"
8	bendavid	1.8	#include "MitEdm/Producers/interface/HitDropperRecord.h"
9			#include "MitEdm/Producers/interface/HitDropper.h"
10	mrudolph	1.3	#include "MitEdm/DataFormats/interface/Types.h"
11	mrudolph	1.4	#include "MitEdm/DataFormats/interface/Collections.h"
12	mrudolph	1.3	#include "MitEdm/DataFormats/interface/DecayPart.h"
13			#include "MitEdm/DataFormats/interface/StablePart.h"
14	bendavid	1.5	#include "MitEdm/DataFormats/interface/StableData.h"
15	mrudolph	1.3	#include "MitEdm/VertexFitInterface/interface/MvfInterface.h"
16			#include "MitEdm/VertexFitInterface/interface/HisInterface.h"
17			#include "MitEdm/Producers/interface/ProducerV2SS.h"
18
19			using namespace std;
20			using namespace edm;
21			using namespace mitedm;
22	bendavid	1.5	using namespace mithep;
23	mrudolph	1.3
24			//--------------------------------------------------------------------------------------------------
25			ProducerV2SS::ProducerV2SS(const ParameterSet& cfg) :
26			ProducerD2SS(cfg),
27	paus	1.10	rhoMin_ (cfg.getUntrackedParameter<double>("minRadius", 0.0)),
28			massMin_ (cfg.getUntrackedParameter<double>("minMass", 0.0)),
29			massMax_ (cfg.getUntrackedParameter<double>("maxMass", 3.0)),
30	bendavid	1.11	dZMax_ (cfg.getUntrackedParameter<double>("maxZDistance",5.0)),
31			useHitDropper_(cfg.getUntrackedParameter<bool>("useHitDropper",true))
32	mrudolph	1.3	{
33	loizides	1.12	// Constructor.
34	mrudolph	1.3	}
35
36			//--------------------------------------------------------------------------------------------------
37			ProducerV2SS::~ProducerV2SS()
38			{
39	loizides	1.12	// Destructor.
40	mrudolph	1.3	}
41
42			//--------------------------------------------------------------------------------------------------
43			void ProducerV2SS::produce(Event &evt, const EventSetup &setup)
44			{
45	loizides	1.12	// Produce the output collection.
46
47	mrudolph	1.3	auto_ptr<DecayPartCol> pD(new DecayPartCol());
48
49			// First input collection
50			Handle<StablePartCol> hStables1;
51			Handle<StablePartCol> hStables2;
52			if (!GetProduct(iStables1_, hStables1, evt) ) {
53			cout << "Couldn't get in collection in Producer V2SS" << endl;
54			evt.put(pD);
55			return;
56			}
57	loizides	1.7	const StablePartCol *pS1 = hStables1.product();
58	mrudolph	1.3
59	loizides	1.7	// Second input collection
60	mrudolph	1.3	if(!GetProduct(iStables2_, hStables2, evt)) {
61			cout << "Couldn't get in collection in Producer V2SS" << endl;
62			evt.put(pD);
63			return;
64			}
65			const StablePartCol *pS2 = hStables2.product();
66	bendavid	1.8
67			//get hit dropper
68			ESHandle<HitDropper> hDropper;
69	bendavid	1.11	const HitDropper *dropper = 0;
70			if (useHitDropper_) {
71			setup.get<HitDropperRecord>().get("HitDropper",hDropper);
72			dropper = hDropper.product();
73			}
74	bendavid	1.15
75			//Get Magnetic Field from event setup, taking value at (0,0,0)
76			edm::ESHandle<MagneticField> magneticField;
77			setup.get<IdealMagneticFieldRecord>().get(magneticField);
78			const double bfield = magneticField->inTesla(GlobalPoint(0.,0.,0.)).z();
79	mrudolph	1.3
80			// -----------------------------------------------------------------------------------------------
81			// Simple double loop
82			// -----------------------------------------------------------------------------------------------
83	loizides	1.7	if (0)
84			cout << "Starting V finder loop" << endl;
85	mrudolph	1.3
86	loizides	1.7	//sX_y: X= pion or proton collection.
87			//i, j = 2 loop particles.
88			//ex.: s1_i and s2_i are same particle as pion and proton
89	mrudolph	1.3	for (UInt_t i=0; i<pS1->size(); ++i) {
90			const StablePart &s1 = pS1->at(i);
91
92			UInt_t j;
93			if (iStables1_ == iStables2_)
94			j = i+1;
95			else
96			j = 0;
97
98			for (; j<pS2->size(); ++j) {
99			const StablePart &s2 = pS2->at(j);
100
101			if(s1.charge() + s2.charge() != 0) continue;
102
103	loizides	1.12	// do fast helix fit to check if there's any hope
104	mrudolph	1.3	const reco::Track * t1 = s1.track();
105			const reco::Track * t2 = s2.track();
106			HisInterface hisInt(t1,t2);
107			const mithep::HelixIntersector *his = hisInt.hISector();
108			double dZ0 = -999;
109			double dR0 = -999;
110			dZ0 = his->IntersectionI(0).DeltaZ();
111			dR0 = sqrt(his->IntersectionI(0).Location().X()*his->IntersectionI(0).Location().X()+
112			his->IntersectionI(0).Location().Y()*his->IntersectionI(0).Location().Y());
113
114			TVector3 v1, v2;
115			v1 = his->IntersectionI(0).TrackParamsI(0).Momentum();
116			v2 = his->IntersectionI(0).TrackParamsI(1).Momentum();
117
118			double e1 = sqrt(v1.Mag()v1.Mag() +s1.mass()s1.mass());
119			double x1 = v1.X();
120			double y1 = v1.Y();
121			double z1 = v1.Z();
122
123			double e2 = sqrt(v2.Mag()v2.Mag()+s2.mass()s2.mass());
124			double x2 = v2.X();
125			double y2 = v2.Y();
126			double z2 = v2.Z();
127
128			FourVector sum(x1+x2, y1+y2, z1+z2, e1+e2);
129
130			double mass0 = sqrt(sum.M2());
131
132	loizides	1.12	// Basic cuts on helix intersection
133	mrudolph	1.3	if(mass0 > massMax_ \|\| mass0<massMin_ \|\| fabs(dZ0) > dZMax_ \|\| dR0 < rhoMin_) continue;
134
135			// -------------------------------------------------------------------------------------------
136			// Do vertex fit for all pairs
137	loizides	1.7	// -------------------------------------------------------------------------------------------
138	paus	1.10	mithep::MultiVertexFitterD fit;
139	bendavid	1.15	fit.init(bfield); // Reset to the magnetic field from the event setup
140	mrudolph	1.3	fit.setChisqMax(100);
141			MvfInterface fitInt(&fit);
142	paus	1.10	fitInt.addTrack(s1.track(),1,s1.mass(),mithep::MultiVertexFitterD::VERTEX_1);
143			fitInt.addTrack(s2.track(),2,s2.mass(),mithep::MultiVertexFitterD::VERTEX_1);
144	mrudolph	1.3
145
146			if (fit.fit()){
147
148			DecayPart *d = new DecayPart(oPid_,DecayPart::Fast);
149	bendavid	1.5
150			// Update temporarily some of the quantities (prob, chi2, nDoF, mass, lxy, pt, fourMomentum)
151			d->setProb(fit.prob());
152			d->setChi2(fit.chisq());
153			d->setNdof(fit.ndof());
154
155			FourVector p4Fitted(0.,0.,0.,0.);
156			p4Fitted += fit.getTrackP4(1);
157			p4Fitted += fit.getTrackP4(2);
158			d->setFourMomentum(p4Fitted);
159	paus	1.10	d->setPosition (fit.getVertex (MultiVertexFitterD::VERTEX_1));
160			d->setError (fit.getErrorMatrix(MultiVertexFitterD::VERTEX_1));
161	bendavid	1.5	float mass, massErr;
162			const int trksIds[2] = { 1, 2 };
163			mass = fit.getMass(2,trksIds,massErr);
164
165			ThreeVector p3Fitted(p4Fitted.px(), p4Fitted.py(), p4Fitted.pz());
166
167			//Get decay length in xy plane
168			float dl, dlErr;
169	paus	1.10	dl = fit.getDecayLength (MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
170			p3Fitted, dlErr);
171	bendavid	1.5
172			//Get Z decay length
173			float dlz, dlzErr;
174	paus	1.10	dlz = fit.getZDecayLength(MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
175			p3Fitted, dlzErr);
176	bendavid	1.5
177			//get impact parameter
178			float dxy, dxyErr;
179	paus	1.10	dxy = fit.getImpactPar (MultiVertexFitterD::PRIMARY_VERTEX, MultiVertexFitterD::VERTEX_1,
180			p3Fitted, dxyErr);
181	bendavid	1.5
182	bendavid	1.8	BasePartPtr ptr1(hStables1,i);
183			BasePartPtr ptr2(hStables2,j);
184
185	paus	1.10	StableData c1(fit.getTrackP4(1).px(),fit.getTrackP4(1).py(), fit.getTrackP4(1).pz(), ptr1);
186			StableData c2(fit.getTrackP4(2).px(),fit.getTrackP4(2).py(), fit.getTrackP4(2).pz(), ptr2);
187	bendavid	1.8
188	paus	1.10	const ThreeVector vtxPos = fit.getVertex(MultiVertexFitterD::VERTEX_1);
189			const ThreeVector trkMom1(fit.getTrackP4(1).px(),fit.getTrackP4(1).py(),
190			fit.getTrackP4(1).pz());
191			const ThreeVector trkMom2(fit.getTrackP4(2).px(),fit.getTrackP4(2).py(),
192			fit.getTrackP4(2).pz());
193	bendavid	1.8
194			//build corrected HitPattern for StableData, removing hits before the fit vertex
195	bendavid	1.11	if (useHitDropper_) {
196	bendavid	1.14	reco::HitPattern hits1 = dropper->CorrectedHitsAOD(s1.track(),
197	loizides	1.12	vtxPos,
198			trkMom1,
199			dlErr,
200			dlzErr);
201	bendavid	1.14	reco::HitPattern hits2 = dropper->CorrectedHitsAOD(s2.track(),
202	loizides	1.12	vtxPos,
203			trkMom2,
204			dlErr,
205			dlzErr);
206	bendavid	1.11
207			c1.SetHits(hits1);
208			c2.SetHits(hits2);
209			c1.SetHitsFilled();
210			c2.SetHitsFilled();
211			}
212	bendavid	1.8
213	paus	1.10	d->addStableChild (c1);
214			d->addStableChild (c2);
215			d->setFittedMass (mass);
216	bendavid	1.5	d->setFittedMassError(massErr);
217	paus	1.10	d->setLxy (dl);
218			d->setLxyError (dlErr);
219			d->setLxyToPv (dl);
220			d->setLxyToPvError (dlErr);
221			d->setLz (dlz);
222			d->setLzError (dlzErr);
223			d->setLzToPv (dlz);
224			d->setLzToPvError (dlzErr);
225			d->setDxy (dxy);
226			d->setDxyError (dxyErr);
227			d->setDxyToPv (dxy);
228			d->setDxyToPvError (dxyErr);
229
230	loizides	1.12	// put the result into our collection
231	mrudolph	1.3	pD->push_back(*d);
232	loizides	1.13	delete d;
233	mrudolph	1.3	} //done processing fit
234	loizides	1.7	} //end j loop
235	mrudolph	1.3	} //end i loop
236
237			// -----------------------------------------------------------------------------------------------
238			// Write the collection even if it is empty
239			// -----------------------------------------------------------------------------------------------
240	loizides	1.7	if (0)
241			cout << " V2SS::produce - " << pD->size() << " entries collection created -"
242			<< " (Pid: " << oPid_ << ")\n";
243	mrudolph	1.3	evt.put(pD);
244			}
245
246	loizides	1.12	// define this as a plug-in
247	mrudolph	1.3	DEFINE_FWK_MODULE(ProducerV2SS);