#include <SiStripElectronSeedGenerator.h>

Classes
struct	Tokens

Public Types
typedef TransientTrackingRecHit::ConstRecHitPointer	ConstRecHitPointer

typedef edm::OwnVector < TrackingRecHit >	PRecHitContainer

typedef TransientTrackingRecHit::RecHitContainer	RecHitContainer

typedef TransientTrackingRecHit::RecHitPointer	RecHitPointer

Public Member Functions
void	run (edm::Event &, const edm::EventSetup &setup, const edm::Handle< reco::SuperClusterCollection > &, reco::ElectronSeedCollection &)

void	setupES (const edm::EventSetup &setup)

	SiStripElectronSeedGenerator (const edm::ParameterSet &, const Tokens &)

	~SiStripElectronSeedGenerator ()

Private Member Functions
bool	altCheckHitsAndTSOS (std::vector< const SiStripMatchedRecHit2D * >::const_iterator hit1, std::vector< const SiStripRecHit2D * >::const_iterator hit2, double scr, double scz, double pT, double scEta)

const SiStripRecHit2D *	backupHitConverter (ConstRecHitPointer crhp)

bool	checkHitsAndTSOS (std::vector< const SiStripMatchedRecHit2D * >::const_iterator hit1, std::vector< const SiStripMatchedRecHit2D * >::const_iterator hit2, double scr, double scz, double pT, double scEta)

void	findSeedsFromCluster (edm::Ref< reco::SuperClusterCollection >, edm::Handle< reco::BeamSpot >, const MeasurementTrackerEvent &trackerData, reco::ElectronSeedCollection &)

const SiStripMatchedRecHit2D *	matchedHitConverter (ConstRecHitPointer crhp)

double	normalPhi (double phi) const

double	phiDiff (double phi1, double phi2)

bool	preselection (GlobalPoint position, GlobalPoint superCluster, double phiVsRSlope, int hitLayer)

double	unwrapPhi (double phi) const

std::vector< bool >	useDetLayer (double scEta)

int	whichSubdetector (std::vector< const SiStripMatchedRecHit2D * >::const_iterator hit)

Private Attributes
std::vector< const SiStripRecHit2D * >	backupLayer2Hits_

edm::EDGetTokenT< reco::BeamSpot >	beamSpotTag_

unsigned long long	cacheIDCkfComp_

unsigned long long	cacheIDMagField_

unsigned long long	cacheIDTrkGeom_

std::vector< const SiStripMatchedRecHit2D * >	layer1Hits_

std::vector< const SiStripMatchedRecHit2D * >	layer2Hits_

int	maxSeeds_

edm::ESHandle< MeasurementTracker >	measurementTrackerHandle

double	monoDeltaPsiCut_

int	monoMaxHits_

double	monoOriginZCut_

double	monoPhiMissHit2Cut_

PTrajectoryStateOnDet	pts_

PRecHitContainer	recHits_

double	tecDeltaPsiCut_

int	tecMaxHits_

double	tecOriginZCut_

double	tecPhiMissHit2Cut_

double	tecRMissHit2Cut_

edm::Handle< reco::BeamSpot >	theBeamSpot

Chi2MeasurementEstimator *	theEstimator

edm::ESHandle< MagneticField >	theMagField

const SiStripRecHitMatcher *	theMatcher_

const MeasurementTracker *	theMeasurementTracker

edm::EDGetTokenT < MeasurementTrackerEvent >	theMeasurementTrackerEventTag

std::string	theMeasurementTrackerName

PropagatorWithMaterial *	thePropagator

const edm::EventSetup *	theSetup

KFUpdator *	theUpdator

double	tibDeltaPsiCut_

double	tibOriginZCut_

double	tibPhiMissHit2Cut_

double	tibZMissHit2Cut_

double	tidDeltaPsiCut_

double	tidEtaUsage_

int	tidMaxHits_

double	tidOriginZCut_

double	tidPhiMissHit2Cut_

double	tidRMissHit2Cut_

edm::ESHandle< TrackerGeometry >	trackerGeometryHandle

Detailed Description

Class to generate the trajectory seed from two Si Strip hits.

Author: Chris Macklin, Avishek Chatterjee

Version: March 2009 (Adapt code to simplify call to SetupES)

Description: SiStrip-driven electron seed finding algorithm.

Definition at line 66 of file SiStripElectronSeedGenerator.h.

Member Typedef Documentation

typedef TransientTrackingRecHit::ConstRecHitPointer SiStripElectronSeedGenerator::ConstRecHitPointer

Definition at line 76 of file SiStripElectronSeedGenerator.h.

typedef edm::OwnVector<TrackingRecHit> SiStripElectronSeedGenerator::PRecHitContainer

Definition at line 75 of file SiStripElectronSeedGenerator.h.

typedef TransientTrackingRecHit::RecHitContainer SiStripElectronSeedGenerator::RecHitContainer

Definition at line 78 of file SiStripElectronSeedGenerator.h.

typedef TransientTrackingRecHit::RecHitPointer SiStripElectronSeedGenerator::RecHitPointer

Definition at line 77 of file SiStripElectronSeedGenerator.h.

Constructor & Destructor Documentation

SiStripElectronSeedGenerator::SiStripElectronSeedGenerator	(	const edm::ParameterSet &	pset,
		const Tokens &	tokens
	)

Definition at line 50 of file SiStripElectronSeedGenerator.cc.

References Chi2MeasurementEstimatorESProducer_cfi::Chi2MeasurementEstimator, edm::ParameterSet::exists(), edm::ParameterSet::getParameter(), AlCaHLTBitMon_QueryRunRegistry::string, theEstimator, theMeasurementTrackerName, and theUpdator.

  : beamSpotTag_(tokens.token_bs),
    theUpdator(0),thePropagator(0),theMeasurementTracker(0),
    theMeasurementTrackerEventTag(tokens.token_mte),
    theSetup(0), theMatcher_(0),
    cacheIDMagField_(0),cacheIDCkfComp_(0),cacheIDTrkGeom_(0),
    tibOriginZCut_(pset.getParameter<double>("tibOriginZCut")),
    tidOriginZCut_(pset.getParameter<double>("tidOriginZCut")),
    tecOriginZCut_(pset.getParameter<double>("tecOriginZCut")),
    monoOriginZCut_(pset.getParameter<double>("monoOriginZCut")),
    tibDeltaPsiCut_(pset.getParameter<double>("tibDeltaPsiCut")),
    tidDeltaPsiCut_(pset.getParameter<double>("tidDeltaPsiCut")),
    tecDeltaPsiCut_(pset.getParameter<double>("tecDeltaPsiCut")),
    monoDeltaPsiCut_(pset.getParameter<double>("monoDeltaPsiCut")),
    tibPhiMissHit2Cut_(pset.getParameter<double>("tibPhiMissHit2Cut")),
    tidPhiMissHit2Cut_(pset.getParameter<double>("tidPhiMissHit2Cut")),
    tecPhiMissHit2Cut_(pset.getParameter<double>("tecPhiMissHit2Cut")),
    monoPhiMissHit2Cut_(pset.getParameter<double>("monoPhiMissHit2Cut")),
    tibZMissHit2Cut_(pset.getParameter<double>("tibZMissHit2Cut")),
    tidRMissHit2Cut_(pset.getParameter<double>("tidRMissHit2Cut")),
    tecRMissHit2Cut_(pset.getParameter<double>("tecRMissHit2Cut")),
    tidEtaUsage_(pset.getParameter<double>("tidEtaUsage")),
    tidMaxHits_(pset.getParameter<int>("tidMaxHits")),
    tecMaxHits_(pset.getParameter<int>("tecMaxHits")),
    monoMaxHits_(pset.getParameter<int>("monoMaxHits")),
    maxSeeds_(pset.getParameter<int>("maxSeeds"))
 {
   // use of a theMeasurementTrackerName
   if (pset.exists("measurementTrackerName"))
    { theMeasurementTrackerName = pset.getParameter<std::string>("measurementTrackerName") ; }
   
 
   // new beamSpot tag
   /*
   if (pset.exists("beamSpot"))
    { beamSpotTag_ = pset.getParameter<edm::InputTag>("beamSpot") ; }
   */
 
   theUpdator = new KFUpdator();
   theEstimator = new Chi2MeasurementEstimator(30,3);
 }

SiStripElectronSeedGenerator::~SiStripElectronSeedGenerator ( )

Definition at line 93 of file SiStripElectronSeedGenerator.cc.

References thePropagator, and theUpdator.

                                                             {
   delete thePropagator;
   delete theUpdator;
 }

Member Function Documentation

bool SiStripElectronSeedGenerator::altCheckHitsAndTSOS	(	std::vector< const SiStripMatchedRecHit2D * >::const_iterator	hit1,
		std::vector< const SiStripRecHit2D * >::const_iterator	hit2,
		double	scr,
		double	scz,
		double	pT,
		double	scEta
	)

private

Definition at line 627 of file SiStripElectronSeedGenerator.cc.

References a, funct::abs(), b, newFWLiteAna::build, edm::EventSetup::get(), FastHelix::isValid(), monoPhiMissHit2Cut_, trajectoryStateTransform::persistentState(), phiDiff(), pts_, diffTwoXMLs::r1, diffTwoXMLs::r2, mathSSE::sqrt(), FastHelix::stateAtVertex(), theMatcher_, thePropagator, theSetup, theUpdator, and trackerGeometryHandle.

                                                                            {
 
   bool seedCutSatisfied = false;
 
   using namespace std;
 
   GlobalPoint hit1Pos = trackerGeometryHandle->idToDet((*hit1)->geographicalId())->surface().toGlobal((*hit1)->localPosition());
   double r1 = sqrt(hit1Pos.x()*hit1Pos.x() + hit1Pos.y()*hit1Pos.y());
   double phi1 = hit1Pos.phi();
   double z1=hit1Pos.z();
 
   GlobalPoint hit2Pos = trackerGeometryHandle->idToDet((*hit2)->geographicalId())->surface().toGlobal((*hit2)->localPosition());
   double r2 = sqrt(hit2Pos.x()*hit2Pos.x() + hit2Pos.y()*hit2Pos.y());
   double phi2 = hit2Pos.phi();
   double z2 = hit2Pos.z();
 
   if(r2 > r1 && std::abs(z2) > std::abs(z1)) {
 
     //Consider the circle made of IP and Hit 1; Calculate it's radius using pT
 
     double curv = pT*100*.877;
 
     //Predict phi of hit 2
     double a = (r2-r1)/(2*curv);
     double b = phiDiff(phi2,phi1);
     double phiMissHit2 = 0;
     if(std::abs(b - a)<std::abs(b + a)) phiMissHit2 = b - a;
     if(std::abs(b - a)>std::abs(b + a)) phiMissHit2 = b + a;
 
     if(std::abs(phiMissHit2) < monoPhiMissHit2Cut_) seedCutSatisfied = true;
 
   }
 
   if(!seedCutSatisfied) return false;
 
   // seed checks borrowed from pixel-based algoritm
 
  
 
   /* Some of this code could be better optimized.  The Pixel algorithm natively
      takes Transient rec hits, so to recycle code we have to build them.
   */
 
   RecHitPointer hit1Trans = TSiStripMatchedRecHit::build(trackerGeometryHandle->idToDet((*hit1)->geographicalId()), *hit1, theMatcher_);
   RecHitPointer hit2Trans = TSiStripMatchedRecHit::build(trackerGeometryHandle->idToDet((*hit2)->geographicalId()), *hit2, theMatcher_);
 
   typedef TrajectoryStateOnSurface TSOS;
 
   double vertexZ = z1 - (r1 * (zc - z1) ) / (rc - r1);
   GlobalPoint eleVertex(0.,0.,vertexZ);
 
    // FIXME optimize: move outside loop
     edm::ESHandle<MagneticField> bfield;
     theSetup->get<IdealMagneticFieldRecord>().get(bfield);
     float nomField = bfield->nominalValue();
 
   // make a spiral
   FastHelix helix(hit2Pos,hit1Pos,eleVertex,nomField,&*bfield);
   if (!helix.isValid()) return false;
 
   FreeTrajectoryState fts(helix.stateAtVertex());
   TSOS propagatedState = thePropagator->propagate(fts,hit1Trans->det()->surface());
 
   if (!propagatedState.isValid()) return false;
 
   TSOS updatedState = theUpdator->update(propagatedState, *hit1Trans);
   TSOS propagatedState_out = thePropagator->propagate(fts,hit2Trans->det()->surface()) ;
 
   if (!propagatedState_out.isValid()) return false;
 
   // the seed has now passed all the cuts
 
   TSOS updatedState_out = theUpdator->update(propagatedState_out, *hit2Trans);
 
   pts_ =  trajectoryStateTransform::persistentState(updatedState_out, hit2Trans->geographicalId().rawId());
 
   return true;
 }

const SiStripRecHit2D * SiStripElectronSeedGenerator::backupHitConverter ( ConstRecHitPointer crhp )

private

Definition at line 762 of file SiStripElectronSeedGenerator.cc.

                                                                                               {
   const TrackingRecHit* trh = crhp->hit();
   const SiStripRecHit2D* backupHit = dynamic_cast<const SiStripRecHit2D*>(trh);
   return backupHit;
 }

bool SiStripElectronSeedGenerator::checkHitsAndTSOS	(	std::vector< const SiStripMatchedRecHit2D * >::const_iterator	hit1,
		std::vector< const SiStripMatchedRecHit2D * >::const_iterator	hit2,
		double	scr,
		double	scz,
		double	pT,
		double	scEta
	)

private

Definition at line 520 of file SiStripElectronSeedGenerator.cc.

References a, funct::abs(), b, newFWLiteAna::build, edm::EventSetup::get(), FastHelix::isValid(), trajectoryStateTransform::persistentState(), phiDiff(), pts_, diffTwoXMLs::r1, diffTwoXMLs::r2, mathSSE::sqrt(), FastHelix::stateAtVertex(), tecPhiMissHit2Cut_, tecRMissHit2Cut_, theMatcher_, thePropagator, theSetup, theUpdator, tibPhiMissHit2Cut_, tibZMissHit2Cut_, tidPhiMissHit2Cut_, tidRMissHit2Cut_, trackerGeometryHandle, and whichSubdetector().

                                                                         {
 
   bool seedCutsSatisfied = false;
 
   using namespace std;
 
   GlobalPoint hit1Pos = trackerGeometryHandle->idToDet((*hit1)->geographicalId())->surface().toGlobal((*hit1)->localPosition());
   double r1 = sqrt(hit1Pos.x()*hit1Pos.x() + hit1Pos.y()*hit1Pos.y());
   double phi1 = hit1Pos.phi();
   double z1=hit1Pos.z();
 
   GlobalPoint hit2Pos = trackerGeometryHandle->idToDet((*hit2)->geographicalId())->surface().toGlobal((*hit2)->localPosition());
   double r2 = sqrt(hit2Pos.x()*hit2Pos.x() + hit2Pos.y()*hit2Pos.y());
   double phi2 = hit2Pos.phi();
   double z2 = hit2Pos.z();
 
   if(r2 > r1 && (std::abs(z2) > std::abs(z1) || std::abs(scEta) < 0.25)) {
 
     //Consider the circle made of IP and Hit 1; Calculate it's radius using pT
 
     double curv = pT*100*.877;
 
     //Predict phi of hit 2
     double a = (r2-r1)/(2*curv);
     double b = phiDiff(phi2,phi1);
     //UB added '=0' to avoid compiler warning
     double phiMissHit2=0;
     if(std::abs(b - a)<std::abs(b + a)) phiMissHit2 = b - a;
     if(std::abs(b - a)>std::abs(b + a)) phiMissHit2 = b + a;
 
     double zMissHit2 = z2 - (r2*(zc-z1)-r1*zc+rc*z1)/(rc-r1);
 
     double rPredHit2 = r1 + (rc-r1)/(zc-z1)*(z2-z1);
     double rMissHit2 = r2 - rPredHit2;
 
     int subdetector = whichSubdetector(hit2);
 
     bool zDiff = true;
     double zVar1 = std::abs(z1);
     double zVar2 = std::abs(z2 - z1);
     if(zVar1 > 75 && zVar1 < 95 && (zVar2 > 18 || zVar2 < 5)) zDiff = false;
     if(zVar1 > 100 && zVar1 < 110 && (zVar2 > 35 || zVar2 < 5)) zDiff = false;
     if(zVar1 > 125 && zVar1 < 150 && (zVar2 > 18 || zVar2 < 5)) zDiff = false;
 
     if(subdetector == 1){
       int tibExtraCut = 0;
       if(r1 > 23 && r1 < 28 && r2 > 31 && r2 < 37) tibExtraCut = 1;
       if(std::abs(phiMissHit2) < tibPhiMissHit2Cut_ && std::abs(zMissHit2) < tibZMissHit2Cut_ && tibExtraCut == 1) seedCutsSatisfied = true;
     }else if(subdetector == 2){
       int tidExtraCut = 0;
       if(r1 > 23 && r1 < 34 && r2 > 26 && r2 < 42) tidExtraCut = 1;
       if(std::abs(phiMissHit2) < tidPhiMissHit2Cut_ && std::abs(rMissHit2) < tidRMissHit2Cut_ && tidExtraCut == 1 && zDiff) seedCutsSatisfied = true;
     }else if(subdetector == 3){
       int tecExtraCut = 0;
       if(r1 > 23 && r1 < 32 && r2 > 26 && r2 < 42) tecExtraCut = 1;
       if(std::abs(phiMissHit2) < tecPhiMissHit2Cut_ && std::abs(rMissHit2) < tecRMissHit2Cut_ && tecExtraCut == 1 && zDiff) seedCutsSatisfied = true;
     }
 
   }
 
   if(!seedCutsSatisfied) return false;
 
   // seed checks borrowed from pixel-based algoritm
 
 
   /* Some of this code could be better optimized.  The Pixel algorithm natively
      takes Transient rec hits, so to recycle code we have to build them.
   */
 
   RecHitPointer hit1Trans = TSiStripMatchedRecHit::build(trackerGeometryHandle->idToDet((*hit1)->geographicalId()), *hit1, theMatcher_);
   RecHitPointer hit2Trans = TSiStripMatchedRecHit::build(trackerGeometryHandle->idToDet((*hit2)->geographicalId()), *hit2, theMatcher_);
 
   typedef TrajectoryStateOnSurface TSOS;
 
   double vertexZ = z1 - (r1 * (zc - z1) ) / (rc - r1);
   GlobalPoint eleVertex(0.,0.,vertexZ);
 
    // FIXME optimize: move outside loop
     edm::ESHandle<MagneticField> bfield;
     theSetup->get<IdealMagneticFieldRecord>().get(bfield);
     float nomField = bfield->nominalValue();
 
   // make a spiral
   FastHelix helix(hit2Pos,hit1Pos,eleVertex,nomField,&*bfield);
   if (!helix.isValid()) return false;
 
   FreeTrajectoryState fts(helix.stateAtVertex());
   TSOS propagatedState = thePropagator->propagate(fts,hit1Trans->det()->surface());
 
   if (!propagatedState.isValid()) return false;
 
   TSOS updatedState = theUpdator->update(propagatedState, *hit1Trans);
   TSOS propagatedState_out = thePropagator->propagate(fts,hit2Trans->det()->surface()) ;
 
   if (!propagatedState_out.isValid()) return false;
 
   // the seed has now passed all the cuts
 
   TSOS updatedState_out = theUpdator->update(propagatedState_out, *hit2Trans);
 
   pts_ =  trajectoryStateTransform::persistentState(updatedState_out, hit2Trans->geographicalId().rawId());
 
   return true;
 }

void SiStripElectronSeedGenerator::findSeedsFromCluster	(	edm::Ref< reco::SuperClusterCollection >	seedCluster,
		edm::Handle< reco::BeamSpot >	bs,
		const MeasurementTrackerEvent &	trackerData,
		reco::ElectronSeedCollection &	result
	)

private

Definition at line 146 of file SiStripElectronSeedGenerator.cc.

References funct::abs(), alongMomentum, SiPixelRawToDigiRegional_cfi::beamSpot, funct::cos(), dir, LayerMeasurements::measurements(), PV3DBase< T, PVType, FrameType >::perp(), position, funct::pow(), singleTopDQM_cfi::preselection, reco::ElectronSeed::setCaloCluster(), funct::sin(), mathSSE::sqrt(), FastHelix::stateAtVertex(), and GeometricSearchTracker::tibLayers().

Referenced by run().

  {
   // clear the member vectors of good hits
   layer1Hits_.clear() ;
   layer2Hits_.clear() ;
   backupLayer2Hits_.clear() ;
 
   using namespace std;
 
   double sCenergy = seedCluster->energy();
   math::XYZPoint sCposition = seedCluster->position();
   double scEta = seedCluster->eta();
 
   double scz = sCposition.z();
   double scr = sqrt(pow(sCposition.x(),2)+pow(sCposition.y(),2));
 
   double pT = sCenergy * seedCluster->position().rho()/sqrt(seedCluster->x()*seedCluster->x()+seedCluster->y()*seedCluster->y()+seedCluster->z()*seedCluster->z());
 
   // FIXME use nominal field (see below)
   double magneticField = 3.8;
 
   // cf Jackson p. 581-2, a little geometry
   double phiVsRSlope = -3.00e-3 * magneticField / pT / 2.;
 
 
   //Need to create TSOS to feed MeasurementTracker
   GlobalPoint beamSpot(bs->x0(),bs->y0(),bs->z0());
   GlobalPoint superCluster(sCposition.x(),sCposition.y(),sCposition.z());
   double r0 = beamSpot.perp();
   double z0 = beamSpot.z();
 
   //We need to pick a charge for the particle we want to reconstruct before hits can be retrieved
   //Choosing both charges improves seeding efficiency by less than 0.5% for signal events
   //If we pick a single charge, this reduces fake rate and CPU time
   //So we pick a charge that is equally likely to be positive or negative
 
   int chargeHypothesis;
   double chargeSelector = sCenergy - (int)sCenergy;
   if(chargeSelector >= 0.5) chargeHypothesis = -1;
   if(chargeSelector < 0.5) chargeHypothesis = 1;
 
   //Use BeamSpot and SC position to estimate 3rd point
   double rFake = 25.;
   double phiFake = phiDiff(superCluster.phi(),chargeHypothesis * phiVsRSlope * (scr - rFake));
   double zFake = (rFake*(scz-z0)-r0*scz+scr*z0)/(scr-r0);
   double xFake = rFake * cos(phiFake);
   double yFake = rFake * sin(phiFake);
   GlobalPoint fakePoint(xFake,yFake,zFake);
 
   // FIXME optmize, move outside loop
   edm::ESHandle<MagneticField> bfield;
   theSetup->get<IdealMagneticFieldRecord>().get(bfield);
   float nomField = bfield->nominalValue();
 
   //Use 3 points to make helix
   FastHelix initialHelix(superCluster,fakePoint,beamSpot,nomField,&*bfield);
 
   //Use helix to get FTS
   FreeTrajectoryState initialFTS(initialHelix.stateAtVertex());
 
   //Use FTS and BeamSpot to create TSOS
   TransverseImpactPointExtrapolator* tipe = new TransverseImpactPointExtrapolator(*thePropagator);
   TrajectoryStateOnSurface initialTSOS = tipe->extrapolate(initialFTS,beamSpot);
 
   //Use GST to retrieve hits from various DetLayers using layerMeasurements class
   const GeometricSearchTracker* gst = theMeasurementTracker->geometricSearchTracker();
 
   std::vector<BarrelDetLayer*> tibLayers = gst->tibLayers();
   DetLayer* tib1 = tibLayers.at(0);
   DetLayer* tib2 = tibLayers.at(1);
 
   std::vector<ForwardDetLayer*> tecLayers;
   std::vector<ForwardDetLayer*> tidLayers;
   if(scEta < 0){
     tecLayers = gst->negTecLayers();
     tidLayers = gst->negTidLayers();
   }
   if(scEta > 0){
     tecLayers = gst->posTecLayers();
     tidLayers = gst->posTidLayers();
   }
 
   DetLayer* tid1 = tidLayers.at(0);
   DetLayer* tid2 = tidLayers.at(1);
   DetLayer* tid3 = tidLayers.at(2);
   DetLayer* tec1 = tecLayers.at(0);
   DetLayer* tec2 = tecLayers.at(1);
   DetLayer* tec3 = tecLayers.at(2);
 
   //Figure out which DetLayers to use based on SC Eta
   std::vector<bool> useDL = useDetLayer(scEta);
   bool useTID = false;
 
   //Use counters to restrict the number of hits in TID and TEC layers
   //This reduces seed multiplicity
   int tid1MHC = 0;
   int tid2MHC = 0;
   int tid3MHC = 0;
   int tid1BHC = 0;
   int tid2BHC = 0;
   int tid3BHC = 0;
   int tec1MHC = 0;
   int tec2MHC = 0;
   int tec3MHC = 0;
 
   //Use counter to limit the allowed number of seeds
   int seedCounter = 0;
 
   bool hasLay1Hit = false;
   bool hasLay2Hit = false;
   bool hasBackupHit = false;
 
   LayerMeasurements layerMeasurements(*theMeasurementTracker, trackerData);
 
   std::vector<TrajectoryMeasurement> tib1measurements;
   if(useDL.at(0)) tib1measurements = layerMeasurements.measurements(*tib1,initialTSOS,*thePropagator,*theEstimator);
   std::vector<TrajectoryMeasurement> tib2measurements;
   if(useDL.at(1)) tib2measurements = layerMeasurements.measurements(*tib2,initialTSOS,*thePropagator,*theEstimator);
 
   //Basic idea: Retrieve hits from a given DetLayer
   //Check if it is a Matched Hit and satisfies some cuts
   //If yes, accept hit for seed making
 
   for(std::vector<TrajectoryMeasurement>::const_iterator tmIter = tib1measurements.begin(); tmIter != tib1measurements.end(); ++ tmIter){
     ConstRecHitPointer hit = tmIter->recHit();
     const SiStripMatchedRecHit2D* matchedHit = matchedHitConverter(hit);
     if(matchedHit){
       GlobalPoint position = trackerGeometryHandle->idToDet(matchedHit->geographicalId())->surface().toGlobal(matchedHit->localPosition());
       if(preselection(position, superCluster, phiVsRSlope, 1)){
     hasLay1Hit = true;
     layer1Hits_.push_back(matchedHit);
       }
     }
   }
 
   for(std::vector<TrajectoryMeasurement>::const_iterator tmIter = tib2measurements.begin(); tmIter != tib2measurements.end(); ++ tmIter){
     ConstRecHitPointer hit = tmIter->recHit();
     const SiStripMatchedRecHit2D* matchedHit = matchedHitConverter(hit);
     if(matchedHit){
       GlobalPoint position = trackerGeometryHandle->idToDet(matchedHit->geographicalId())->surface().toGlobal(matchedHit->localPosition());
       if(preselection(position, superCluster, phiVsRSlope, 1)){
     hasLay2Hit = true;
     layer2Hits_.push_back(matchedHit);
       }
     }
   }
 
   if(!(hasLay1Hit && hasLay2Hit)) useTID = true;
   if(std::abs(scEta) > tidEtaUsage_) useTID = true;
   std::vector<TrajectoryMeasurement> tid1measurements;
   if(useDL.at(2) && useTID) tid1measurements = layerMeasurements.measurements(*tid1,initialTSOS,*thePropagator,*theEstimator);
   std::vector<TrajectoryMeasurement> tid2measurements;
   if(useDL.at(3) && useTID) tid2measurements = layerMeasurements.measurements(*tid2,initialTSOS,*thePropagator,*theEstimator);
   std::vector<TrajectoryMeasurement> tid3measurements;
   if(useDL.at(4) && useTID) tid3measurements = layerMeasurements.measurements(*tid3,initialTSOS,*thePropagator,*theEstimator);
 
   for(std::vector<TrajectoryMeasurement>::const_iterator tmIter = tid1measurements.begin(); tmIter != tid1measurements.end(); ++ tmIter){
     if(tid1MHC < tidMaxHits_){
     ConstRecHitPointer hit = tmIter->recHit();
     const SiStripMatchedRecHit2D* matchedHit = matchedHitConverter(hit);
     if(matchedHit){
       GlobalPoint position = trackerGeometryHandle->idToDet(matchedHit->geographicalId())->surface().toGlobal(matchedHit->localPosition());
       if(preselection(position, superCluster, phiVsRSlope, 2)){
     tid1MHC++;
     hasLay1Hit = true;
     layer1Hits_.push_back(matchedHit);
     hasLay2Hit = true;
     layer2Hits_.push_back(matchedHit);
       }
     }else if(useDL.at(8) && tid1BHC < monoMaxHits_){
       const SiStripRecHit2D* backupHit = backupHitConverter(hit);
       if(backupHit){
     GlobalPoint position = trackerGeometryHandle->idToDet(backupHit->geographicalId())->surface().toGlobal(backupHit->localPosition());
     if(preselection(position, superCluster, phiVsRSlope, 4) && position.perp() > 37.){
       tid1BHC++;
       hasBackupHit = true;
       backupLayer2Hits_.push_back(backupHit);
     }
       }
     }
     }
   }
 
   for(std::vector<TrajectoryMeasurement>::const_iterator tmIter = tid2measurements.begin(); tmIter != tid2measurements.end(); ++ tmIter){
     if(tid2MHC < tidMaxHits_){
     ConstRecHitPointer hit = tmIter->recHit();
     const SiStripMatchedRecHit2D* matchedHit = matchedHitConverter(hit);
     if(matchedHit){
       GlobalPoint position = trackerGeometryHandle->idToDet(matchedHit->geographicalId())->surface().toGlobal(matchedHit->localPosition());
       if(preselection(position, superCluster, phiVsRSlope, 2)){
     tid2MHC++;
     hasLay1Hit = true;
     layer1Hits_.push_back(matchedHit);
     hasLay2Hit = true;
     layer2Hits_.push_back(matchedHit);
       }
     }else if(useDL.at(8) && tid2BHC < monoMaxHits_){
       const SiStripRecHit2D* backupHit = backupHitConverter(hit);
       if(backupHit){
     GlobalPoint position = trackerGeometryHandle->idToDet(backupHit->geographicalId())->surface().toGlobal(backupHit->localPosition());
     if(preselection(position, superCluster, phiVsRSlope, 4) && position.perp() > 37.){
       tid2BHC++;
       hasBackupHit = true;
       backupLayer2Hits_.push_back(backupHit);
     }
       }
     }
     }
   }
 
   for(std::vector<TrajectoryMeasurement>::const_iterator tmIter = tid3measurements.begin(); tmIter != tid3measurements.end(); ++ tmIter){
     if(tid3MHC < tidMaxHits_){
     ConstRecHitPointer hit = tmIter->recHit();
     const SiStripMatchedRecHit2D* matchedHit = matchedHitConverter(hit);
     if(matchedHit){
       GlobalPoint position = trackerGeometryHandle->idToDet(matchedHit->geographicalId())->surface().toGlobal(matchedHit->localPosition());
       if(preselection(position, superCluster, phiVsRSlope, 2)){
     tid3MHC++;
     hasLay1Hit = true;
     layer1Hits_.push_back(matchedHit);
     hasLay2Hit = true;
     layer2Hits_.push_back(matchedHit);
       }
     }else if(useDL.at(8) && tid3BHC < monoMaxHits_){
       const SiStripRecHit2D* backupHit = backupHitConverter(hit);
       if(backupHit){
     GlobalPoint position = trackerGeometryHandle->idToDet(backupHit->geographicalId())->surface().toGlobal(backupHit->localPosition());
     if(preselection(position, superCluster, phiVsRSlope, 4) && position.perp() > 37.){
       tid3BHC++;
       hasBackupHit = true;
       backupLayer2Hits_.push_back(backupHit);
     }
       }
     }
     }
   }
 
   std::vector<TrajectoryMeasurement> tec1measurements;
   if(useDL.at(5)) tec1measurements = layerMeasurements.measurements(*tec1,initialTSOS,*thePropagator,*theEstimator);
   std::vector<TrajectoryMeasurement> tec2measurements;
   if(useDL.at(6)) tec2measurements = layerMeasurements.measurements(*tec2,initialTSOS,*thePropagator,*theEstimator);
   std::vector<TrajectoryMeasurement> tec3measurements;
   if(useDL.at(7)) tec3measurements = layerMeasurements.measurements(*tec3,initialTSOS,*thePropagator,*theEstimator);
 
   for(std::vector<TrajectoryMeasurement>::const_iterator tmIter = tec1measurements.begin(); tmIter != tec1measurements.end(); ++ tmIter){
     if(tec1MHC < tecMaxHits_){
     ConstRecHitPointer hit = tmIter->recHit();
     const SiStripMatchedRecHit2D* matchedHit = matchedHitConverter(hit);
     if(matchedHit){
       GlobalPoint position = trackerGeometryHandle->idToDet(matchedHit->geographicalId())->surface().toGlobal(matchedHit->localPosition());
       if(preselection(position, superCluster, phiVsRSlope, 3)){
     tec1MHC++;
     hasLay1Hit = true;
     layer1Hits_.push_back(matchedHit);
     hasLay2Hit = true;
     layer2Hits_.push_back(matchedHit);
       }
     }
     }
   }
 
   for(std::vector<TrajectoryMeasurement>::const_iterator tmIter = tec2measurements.begin(); tmIter != tec2measurements.end(); ++ tmIter){
     if(tec2MHC < tecMaxHits_){
     ConstRecHitPointer hit = tmIter->recHit();
     const SiStripMatchedRecHit2D* matchedHit = matchedHitConverter(hit);
     if(matchedHit){
       GlobalPoint position = trackerGeometryHandle->idToDet(matchedHit->geographicalId())->surface().toGlobal(matchedHit->localPosition());
       if(preselection(position, superCluster, phiVsRSlope, 3)){
     tec2MHC++;
     hasLay1Hit = true;
     layer1Hits_.push_back(matchedHit);
     hasLay2Hit = true;
     layer2Hits_.push_back(matchedHit);
       }
     }
     }
   }
 
   for(std::vector<TrajectoryMeasurement>::const_iterator tmIter = tec3measurements.begin(); tmIter != tec3measurements.end(); ++ tmIter){
     if(tec3MHC < tecMaxHits_){
     ConstRecHitPointer hit = tmIter->recHit();
     const SiStripMatchedRecHit2D* matchedHit = matchedHitConverter(hit);
     if(matchedHit){
       GlobalPoint position = trackerGeometryHandle->idToDet(matchedHit->geographicalId())->surface().toGlobal(matchedHit->localPosition());
       if(preselection(position, superCluster, phiVsRSlope, 3)){
     tec3MHC++;
     hasLay2Hit = true;
     layer2Hits_.push_back(matchedHit);
       }
     }
     }
   }
 
   // We have 2 arrays of hits, combine them to form seeds
   if( hasLay1Hit && hasLay2Hit ){
 
     for (std::vector<const SiStripMatchedRecHit2D*>::const_iterator hit1 = layer1Hits_.begin() ; hit1!= layer1Hits_.end(); ++hit1) {
       for (std::vector<const SiStripMatchedRecHit2D*>::const_iterator hit2 = layer2Hits_.begin() ; hit2!= layer2Hits_.end(); ++hit2) {
 
     if(seedCounter < maxSeeds_){
 
       if(checkHitsAndTSOS(hit1,hit2,scr,scz,pT,scEta)) {
 
         seedCounter++;
 
         recHits_.clear();
 
         SiStripMatchedRecHit2D *hit;
         hit=new SiStripMatchedRecHit2D(*(dynamic_cast <const SiStripMatchedRecHit2D *> (*hit1) ) );
         recHits_.push_back(hit);
         hit=new SiStripMatchedRecHit2D(*(dynamic_cast <const SiStripMatchedRecHit2D *> (*hit2) ) );
         recHits_.push_back(hit);
 
         PropagationDirection dir = alongMomentum;
         reco::ElectronSeed seed(pts_,recHits_,dir) ;
         reco::ElectronSeed::CaloClusterRef caloCluster(seedCluster) ;
         seed.setCaloCluster(caloCluster) ;
         result.push_back(seed);
 
       }
 
     }
 
       }// end of hit 2 loop
 
     }// end of hit 1 loop
 
   }//end of seed making
 
   //Make seeds using TID Ring 3 if necessary
 
   if(hasLay1Hit && hasBackupHit && seedCounter == 0){
 
     for (std::vector<const SiStripMatchedRecHit2D*>::const_iterator hit1 = layer1Hits_.begin() ; hit1!= layer1Hits_.end(); ++hit1) {
       for (std::vector<const SiStripRecHit2D*>::const_iterator hit2 = backupLayer2Hits_.begin() ; hit2!= backupLayer2Hits_.end(); ++hit2) {
 
     if(seedCounter < maxSeeds_){
 
       if(altCheckHitsAndTSOS(hit1,hit2,scr,scz,pT,scEta)) {
 
         seedCounter++;
 
         recHits_.clear();
 
         SiStripMatchedRecHit2D *innerHit;
         innerHit=new SiStripMatchedRecHit2D(*(dynamic_cast <const SiStripMatchedRecHit2D *> (*hit1) ) );
         recHits_.push_back(innerHit);
         SiStripRecHit2D *outerHit;
         outerHit=new SiStripRecHit2D(*(dynamic_cast <const SiStripRecHit2D *> (*hit2) ) );
         recHits_.push_back(outerHit);
 
         PropagationDirection dir = alongMomentum;
         reco::ElectronSeed seed(pts_,recHits_,dir) ;
         reco::ElectronSeed::CaloClusterRef caloCluster(seedCluster) ;
         seed.setCaloCluster(caloCluster) ;
         result.push_back(seed);
 
       }
 
     }
 
       }// end of hit 2 loop
 
     }// end of hit 1 loop
 
   }// end of backup seed making
 
 } // end of findSeedsFromCluster

const SiStripMatchedRecHit2D * SiStripElectronSeedGenerator::matchedHitConverter ( ConstRecHitPointer crhp )

private

Definition at line 756 of file SiStripElectronSeedGenerator.cc.

                                                                                                       {
   const TrackingRecHit* trh = crhp->hit();
   const SiStripMatchedRecHit2D* matchedHit = dynamic_cast<const SiStripMatchedRecHit2D*>(trh);
   return matchedHit;
 }

double SiStripElectronSeedGenerator::normalPhi ( double phi ) const

inlineprivate

Definition at line 91 of file SiStripElectronSeedGenerator.h.

References M_PI, and phi.

Referenced by phiDiff().

                                      {
     while (phi > 2.* M_PI) { phi -= 2.*M_PI; }
     while (phi < 0) { phi += 2.*M_PI; }
     return phi;
   }

double SiStripElectronSeedGenerator::phiDiff	(	double	phi1,
		double	phi2
	)

inlineprivate

Definition at line 97 of file SiStripElectronSeedGenerator.h.

References M_PI, normalPhi(), and query::result.

Referenced by altCheckHitsAndTSOS(), checkHitsAndTSOS(), and preselection().

                                           {
     double result = normalPhi(phi1) - normalPhi(phi2);
     if(result > M_PI) result -= 2*M_PI;
     if(result < -M_PI) result += 2*M_PI;
     return result;
   }

bool SiStripElectronSeedGenerator::preselection	(	GlobalPoint	position,
		GlobalPoint	superCluster,
		double	phiVsRSlope,
		int	hitLayer
	)

private

Definition at line 709 of file SiStripElectronSeedGenerator.cc.

References funct::abs(), monoDeltaPsiCut_, monoOriginZCut_, PV3DBase< T, PVType, FrameType >::perp(), phi, PV3DBase< T, PVType, FrameType >::phi(), phiDiff(), alignCSCRings::r, query::result, tecDeltaPsiCut_, tecOriginZCut_, tibDeltaPsiCut_, tibOriginZCut_, tidDeltaPsiCut_, tidOriginZCut_, detailsBasic3DVector::z, and PV3DBase< T, PVType, FrameType >::z().

                                                                                                                             {
   double r = position.perp();
   double phi = position.phi();
   double z = position.z();
   double scr = superCluster.perp();
   double scphi = superCluster.phi();
   double scz = superCluster.z();
   double psi = phiDiff(phi,scphi);
   double deltaPsi = psi - (scr-r)*phiVsRSlope;
   double antiDeltaPsi = psi - (r-scr)*phiVsRSlope;
   double dP;
   if (std::abs(deltaPsi)<std::abs(antiDeltaPsi)){
     dP = deltaPsi;
   }else{
     dP = antiDeltaPsi;
   }
   double originZ = (scr*z - r*scz)/(scr-r);
 
   bool result = false;
 
   if(hitLayer == 1){
     if(std::abs(originZ) < tibOriginZCut_ && std::abs(dP) < tibDeltaPsiCut_) result = true;
   }else if(hitLayer == 2){
     if(std::abs(originZ) < tidOriginZCut_ && std::abs(dP) < tidDeltaPsiCut_) result = true;
   }else if(hitLayer == 3){
     if(std::abs(originZ) < tecOriginZCut_ && std::abs(dP) < tecDeltaPsiCut_) result = true;
   }else if(hitLayer == 4){
     if(std::abs(originZ) < monoOriginZCut_ && std::abs(dP) < monoDeltaPsiCut_) result = true;
   }
 
   return result;
 }

void SiStripElectronSeedGenerator::run	(	edm::Event &	e,
		const edm::EventSetup &	setup,
		const edm::Handle< reco::SuperClusterCollection > &	clusters,
		reco::ElectronSeedCollection &	out
	)

Definition at line 121 of file SiStripElectronSeedGenerator.cc.

References beamSpotTag_, data, findSeedsFromCluster(), edm::Event::getByToken(), i, edm::EventBase::id(), LogDebug, HcalObjRepresent::setup(), theBeamSpot, theMeasurementTrackerEventTag, and theSetup.

                                                       {
   theSetup= &setup;
 
   e.getByToken(beamSpotTag_,theBeamSpot);
   edm::Handle<MeasurementTrackerEvent> data;
   e.getByToken(theMeasurementTrackerEventTag, data);
 
 
   for  (unsigned int i=0;i<clusters->size();++i) {
     edm::Ref<reco::SuperClusterCollection> theClusB(clusters,i);
     // Find the seeds
     LogDebug ("run") << "new cluster, calling findSeedsFromCluster";
     findSeedsFromCluster(theClusB,theBeamSpot,*data,out);
   }
 
   LogDebug ("run") << ": For event "<<e.id();
   LogDebug ("run") <<"Nr of superclusters: "<<clusters->size()
            <<", no. of ElectronSeeds found  = " << out.size();
 }

void SiStripElectronSeedGenerator::setupES ( const edm::EventSetup & setup )

Definition at line 99 of file SiStripElectronSeedGenerator.cc.

References alongMomentum, cacheIDCkfComp_, edm::eventsetup::EventSetupRecord::cacheIdentifier(), cacheIDMagField_, cacheIDTrkGeom_, edm::EventSetup::get(), measurementTrackerHandle, edm::ESHandle< class >::product(), theMagField, theMeasurementTracker, theMeasurementTrackerName, thePropagator, and trackerGeometryHandle.

                                                                      {
 
   if (cacheIDMagField_!=setup.get<IdealMagneticFieldRecord>().cacheIdentifier()) {
     setup.get<IdealMagneticFieldRecord>().get(theMagField);
     cacheIDMagField_=setup.get<IdealMagneticFieldRecord>().cacheIdentifier();
     if (thePropagator) delete thePropagator;
     thePropagator = new PropagatorWithMaterial(alongMomentum,.000511,&(*theMagField));
   }
 
   if (cacheIDCkfComp_!=setup.get<CkfComponentsRecord>().cacheIdentifier()) {
     setup.get<CkfComponentsRecord>().get(theMeasurementTrackerName,measurementTrackerHandle);
     cacheIDCkfComp_=setup.get<CkfComponentsRecord>().cacheIdentifier();
     theMeasurementTracker = measurementTrackerHandle.product();
   }
 
   if (cacheIDTrkGeom_!=setup.get<TrackerDigiGeometryRecord>().cacheIdentifier()) {
     setup.get<TrackerDigiGeometryRecord>().get(trackerGeometryHandle);
     cacheIDTrkGeom_=setup.get<TrackerDigiGeometryRecord>().cacheIdentifier();
   }
 
 }

double SiStripElectronSeedGenerator::unwrapPhi ( double phi ) const

inlineprivate

Definition at line 104 of file SiStripElectronSeedGenerator.h.

References M_PI, and phi.

                                      {
     while (phi > M_PI) { phi -= 2.*M_PI; }
     while (phi < -M_PI) { phi += 2.*M_PI; }
     return phi;
   }

std::vector< bool > SiStripElectronSeedGenerator::useDetLayer ( double scEta )

private

Definition at line 768 of file SiStripElectronSeedGenerator.cc.

References funct::abs().

                                                                      {
   std::vector<bool> useDetLayer;
   double variable = std::abs(scEta);
   if(variable > 0 && variable < 1.8){
     useDetLayer.push_back(true);
   }else{
     useDetLayer.push_back(false);
   }
   if(variable > 0 && variable < 1.5){
     useDetLayer.push_back(true);
   }else{
     useDetLayer.push_back(false);
   }
   if(variable > 1 && variable < 2.1){
     useDetLayer.push_back(true);
   }else{
     useDetLayer.push_back(false);
   }
   if(variable > 1 && variable < 2.2){
     useDetLayer.push_back(true);
   }else{
     useDetLayer.push_back(false);
   }
   if(variable > 1 && variable < 2.3){
     useDetLayer.push_back(true);
   }else{
     useDetLayer.push_back(false);
   }
   if(variable > 1.8 && variable < 2.5){
     useDetLayer.push_back(true);
   }else{
     useDetLayer.push_back(false);
   }
   if(variable > 1.8 && variable < 2.5){
     useDetLayer.push_back(true);
   }else{
     useDetLayer.push_back(false);
   }
   if(variable > 1.8 && variable < 2.5){
     useDetLayer.push_back(true);
   }else{
     useDetLayer.push_back(false);
   }
   if(variable > 1.2 && variable < 1.6){
     useDetLayer.push_back(true);
   }else{
     useDetLayer.push_back(false);
   }
   return useDetLayer;
 }

int SiStripElectronSeedGenerator::whichSubdetector ( std::vector< const SiStripMatchedRecHit2D * >::const_iterator hit )

private

Definition at line 744 of file SiStripElectronSeedGenerator.cc.

References query::result, StripSubdetector::TEC, StripSubdetector::TIB, and StripSubdetector::TID.

Referenced by checkHitsAndTSOS().

                                                                                                             {
   int result = 0;
   if(((*hit)->geographicalId()).subdetId() == StripSubdetector::TIB){
     result = 1;
   }else if(((*hit)->geographicalId()).subdetId() == StripSubdetector::TID){
     result = 2;
   }else if(((*hit)->geographicalId()).subdetId() == StripSubdetector::TEC){
     result = 3;
   }
   return result;
 }