MuonSeedBuilder Class Reference

#include <MuonSeedBuilder.h>

Public Types
typedef std::deque< bool >	BoolContainer
typedef MuonTransientTrackingRecHit::MuonRecHitContainer	SegmentContainer

Public Member Functions
int	build (edm::Event &event, const edm::EventSetup &eventSetup, TrajectorySeedCollection &seeds)
	Build seed collection. More...
	MuonSeedBuilder (const edm::ParameterSet &, edm::ConsumesCollector &)
	Constructor. More...
void	setBField (const MagneticField *theField)
	Cache pointer to Magnetic field. More...
void	setGeometry (const MuonDetLayerGeometry *lgeom)
	Cache pointer to geometry. More...
	~MuonSeedBuilder ()
	Destructor. More...

Public Attributes
std::vector< int >	badSeedLayer

Private Member Functions
double	etaError (const GlobalPoint gp, double rErr)
	calculate the eta error from global R error More...
bool	foundMatchingSegment (int type, SegmentContainer &protoTrack, SegmentContainer &segments, BoolContainer &usedSeg, float &eta_temp, float &phi_temp, int &lastLayer, bool &showeringBefore)
	Find segment which matches protoTrack for endcap only. More...
bool	IdentifyShowering (SegmentContainer &segs, BoolContainer &usedSeg, float &eta_last, float &phi_last, int layer, int &NShoweringSegments)
	identify the showering layer More...
std::vector< TrajectorySeed >	seedCleaner (const edm::EventSetup &eventSetup, std::vector< TrajectorySeed > &seeds)
	cleaning the seeds More...

Private Attributes
const MagneticField *	BField
bool	debug
	group the seeds More...
bool	enableCSCMeasurement
bool	enableDTMeasurement
float	maxDeltaEtaCSC
float	maxDeltaEtaDT
float	maxDeltaEtaOverlap
float	maxDeltaPhiCSC
float	maxDeltaPhiDT
float	maxDeltaPhiOverlap
float	maxEtaResolutionCSC
float	maxEtaResolutionDT
float	maxPhiResolutionCSC
float	maxPhiResolutionDT
int	minCSCHitsPerSegment
int	minDTHitsPerSegment
const MuonDetLayerGeometry *	muonLayers
MuonDetLayerMeasurements *	muonMeasurements
MuonSeedCleaner *	muonSeedClean_
MuonSeedCreator *	muonSeedCreate_
	Create seed according to region (CSC, DT, Overlap) More...
int	NShowerSeg
std::vector< int >	ShoweringLayers
SegmentContainer	ShoweringSegments
edm::InputTag	theCSCSegmentLabel
	Name of the CSC segment collection. More...
edm::InputTag	theDTSegmentLabel
	Name of the DT segment collection. More...
float	theMinMomentum

Detailed Description

Algorith to build TrajectorySeed for muon standalone reconstruction. The segments are sorted out to make a protoTrack (vector of matching segments in different stations a.k.a. layers), for DT+overlap and CSC regions, in that order.
The protoTrack is then passed to the seed creator to create CSC, overlap and/or DT seeds.

Author

Shih-Chuan Kao, Dominique Fortin - UCR

Definition at line 30 of file MuonSeedBuilder.h.

Member Typedef Documentation

BoolContainer

typedef std::deque<bool> MuonSeedBuilder::BoolContainer

Definition at line 33 of file MuonSeedBuilder.h.

SegmentContainer

typedef MuonTransientTrackingRecHit::MuonRecHitContainer MuonSeedBuilder::SegmentContainer

Definition at line 32 of file MuonSeedBuilder.h.

Constructor & Destructor Documentation

MuonSeedBuilder()

MuonSeedBuilder::MuonSeedBuilder ( const edm::ParameterSet &  pset, edm::ConsumesCollector &  iC  )

explicit

Constructor.

See header file for a description of this class.

Author

Shih-Chuan Kao, Dominique Fortin - UCR

Definition at line 51 of file MuonSeedBuilder.cc.

References debug, enableCSCMeasurement, enableDTMeasurement, maxDeltaEtaCSC, maxDeltaEtaDT, maxDeltaEtaOverlap, maxDeltaPhiCSC, maxDeltaPhiDT, maxDeltaPhiOverlap, maxEtaResolutionCSC, maxEtaResolutionDT, maxPhiResolutionCSC, maxPhiResolutionDT, minCSCHitsPerSegment, minDTHitsPerSegment, muonMeasurements, muonSeedClean_, muonSeedCreate_, muonDTDigis_cfi::pset, theCSCSegmentLabel, and theDTSegmentLabel.

                                                                                      {
  // Local Debug flag
  debug = pset.getParameter<bool>("DebugMuonSeed");

  // enable the DT chamber
  enableDTMeasurement = pset.getParameter<bool>("EnableDTMeasurement");
  theDTSegmentLabel = pset.getParameter<edm::InputTag>("DTSegmentLabel");

  // enable the CSC chamber
  enableCSCMeasurement = pset.getParameter<bool>("EnableCSCMeasurement");
  theCSCSegmentLabel = pset.getParameter<edm::InputTag>("CSCSegmentLabel");

  // Parameters for seed creation in endcap region
  minCSCHitsPerSegment = pset.getParameter<int>("minCSCHitsPerSegment");
  maxDeltaEtaCSC = pset.getParameter<double>("maxDeltaEtaCSC");
  maxDeltaPhiCSC = pset.getParameter<double>("maxDeltaPhiCSC");

  // Parameters for seed creation in overlap region
  maxDeltaEtaOverlap = pset.getParameter<double>("maxDeltaEtaOverlap");
  maxDeltaPhiOverlap = pset.getParameter<double>("maxDeltaPhiOverlap");

  // Parameters for seed creation in barrel region
  minDTHitsPerSegment = pset.getParameter<int>("minDTHitsPerSegment");
  maxDeltaEtaDT = pset.getParameter<double>("maxDeltaEtaDT");
  maxDeltaPhiDT = pset.getParameter<double>("maxDeltaPhiDT");

  // Parameters to suppress combinatorics (ghosts)
  maxEtaResolutionDT = pset.getParameter<double>("maxEtaResolutionDT");
  maxPhiResolutionDT = pset.getParameter<double>("maxPhiResolutionDT");
  maxEtaResolutionCSC = pset.getParameter<double>("maxEtaResolutionCSC");
  maxPhiResolutionCSC = pset.getParameter<double>("maxPhiResolutionCSC");

  // Class for forming muon seeds
  muonSeedCreate_ = new MuonSeedCreator(pset);
  muonSeedClean_ = new MuonSeedCleaner(pset, edm::ConsumesCollector(iC));

  // Instantiate the accessor (get the segments: DT + CSC but not RPC=false)
  muonMeasurements = new MuonDetLayerMeasurements(theDTSegmentLabel,
                                                  theCSCSegmentLabel,
                                                  edm::InputTag(),
                                                  edm::InputTag(),
                                                  edm::InputTag(),
                                                  iC,
                                                  enableDTMeasurement,
                                                  enableCSCMeasurement,
                                                  false,
                                                  false,
                                                  false);
}

~MuonSeedBuilder()

MuonSeedBuilder::~MuonSeedBuilder

(

)

Destructor.

Definition at line 104 of file MuonSeedBuilder.cc.

References muonMeasurements, muonSeedClean_, and muonSeedCreate_.

                                  {
  delete muonSeedCreate_;
  delete muonSeedClean_;
  if (muonMeasurements)
    delete muonMeasurements;
}

Member Function Documentation

build()

int MuonSeedBuilder::build	(	edm::Event &	event,
		const edm::EventSetup &	eventSetup,
		TrajectorySeedCollection &	seeds
	)

Build seed collection.

Definition at line 119 of file MuonSeedBuilder.cc.

References MuonDetLayerGeometry::allDTLayers(), MuonDetLayerGeometry::backwardCSCLayers(), BField, gather_cfg::cout, MuonSeedCreator::createSeed(), debug, options_cfi::eventSetup, MuonDetLayerGeometry::forwardCSCLayers(), foundMatchingSegment(), runTauDisplay::gp, mps_fire::i, IdentifyShowering(), hgcalTopologyTester_cfi::layers, minCSCHitsPerSegment, minDTHitsPerSegment, muonLayers, muonMeasurements, muonSeedClean_, muonSeedCreate_, NShowerSeg, MuonDetLayerMeasurements::recHits(), MuonSeedCleaner::seedCleaner(), MuonSeedCreator::setBField(), ShoweringLayers, and ShoweringSegments.

Referenced by MuonSeedProducer::produce().

                                                                                                               {
  // Pass the Magnetic Field to where the seed is create
  muonSeedCreate_->setBField(BField);

  // Create temporary collection of seeds which will be cleaned up to remove combinatorics
  std::vector<TrajectorySeed> rawSeeds;
  std::vector<float> etaOfSeed;
  std::vector<float> phiOfSeed;
  std::vector<int> nSegOnSeed;

  // Instantiate the accessor (get the segments: DT + CSC but not RPC=false)
  // MuonDetLayerMeasurements muonMeasurements(enableDTMeasurement,enableCSCMeasurement,false,
  //                                          theDTSegmentLabel.label(),theCSCSegmentLabel.label());

  // 1) Get the various stations and store segments in containers for each station (layers)

  // 1a. get the DT segments by stations (layers):
  std::vector<const DetLayer*> dtLayers = muonLayers->allDTLayers();

  SegmentContainer DTlist4 = muonMeasurements->recHits(dtLayers[3], event);
  SegmentContainer DTlist3 = muonMeasurements->recHits(dtLayers[2], event);
  SegmentContainer DTlist2 = muonMeasurements->recHits(dtLayers[1], event);
  SegmentContainer DTlist1 = muonMeasurements->recHits(dtLayers[0], event);

  // Initialize flags that a given segment has been allocated to a seed
  BoolContainer usedDTlist4(DTlist4.size(), false);
  BoolContainer usedDTlist3(DTlist3.size(), false);
  BoolContainer usedDTlist2(DTlist2.size(), false);
  BoolContainer usedDTlist1(DTlist1.size(), false);

  if (debug) {
    std::cout << "*** Number of DT segments is: " << DTlist4.size() + DTlist3.size() + DTlist2.size() + DTlist1.size()
              << std::endl;
    std::cout << "In MB1: " << DTlist1.size() << std::endl;
    std::cout << "In MB2: " << DTlist2.size() << std::endl;
    std::cout << "In MB3: " << DTlist3.size() << std::endl;
    std::cout << "In MB4: " << DTlist4.size() << std::endl;
  }

  // 1b. get the CSC segments by stations (layers):
  // 1b.1 Global z < 0
  std::vector<const DetLayer*> cscBackwardLayers = muonLayers->backwardCSCLayers();
  SegmentContainer CSClist4B = muonMeasurements->recHits(cscBackwardLayers[4], event);
  SegmentContainer CSClist3B = muonMeasurements->recHits(cscBackwardLayers[3], event);
  SegmentContainer CSClist2B = muonMeasurements->recHits(cscBackwardLayers[2], event);
  SegmentContainer CSClist1B = muonMeasurements->recHits(cscBackwardLayers[1], event);  // ME1/2 and 1/3
  SegmentContainer CSClist0B = muonMeasurements->recHits(cscBackwardLayers[0], event);  // ME11

  BoolContainer usedCSClist4B(CSClist4B.size(), false);
  BoolContainer usedCSClist3B(CSClist3B.size(), false);
  BoolContainer usedCSClist2B(CSClist2B.size(), false);
  BoolContainer usedCSClist1B(CSClist1B.size(), false);
  BoolContainer usedCSClist0B(CSClist0B.size(), false);

  // 1b.2 Global z > 0
  std::vector<const DetLayer*> cscForwardLayers = muonLayers->forwardCSCLayers();
  SegmentContainer CSClist4F = muonMeasurements->recHits(cscForwardLayers[4], event);
  SegmentContainer CSClist3F = muonMeasurements->recHits(cscForwardLayers[3], event);
  SegmentContainer CSClist2F = muonMeasurements->recHits(cscForwardLayers[2], event);
  SegmentContainer CSClist1F = muonMeasurements->recHits(cscForwardLayers[1], event);
  SegmentContainer CSClist0F = muonMeasurements->recHits(cscForwardLayers[0], event);

  BoolContainer usedCSClist4F(CSClist4F.size(), false);
  BoolContainer usedCSClist3F(CSClist3F.size(), false);
  BoolContainer usedCSClist2F(CSClist2F.size(), false);
  BoolContainer usedCSClist1F(CSClist1F.size(), false);
  BoolContainer usedCSClist0F(CSClist0F.size(), false);

  if (debug) {
    std::cout << "*** Number of CSC segments is "
              << CSClist4F.size() + CSClist3F.size() + CSClist2F.size() + CSClist1F.size() + CSClist0F.size() +
                     CSClist4B.size() + CSClist3B.size() + CSClist2B.size() + CSClist1B.size() + CSClist0B.size()
              << std::endl;
    std::cout << "In ME11: " << CSClist0F.size() + CSClist0B.size() << std::endl;
    std::cout << "In ME12: " << CSClist1F.size() + CSClist1B.size() << std::endl;
    std::cout << "In ME2 : " << CSClist2F.size() + CSClist2B.size() << std::endl;
    std::cout << "In ME3 : " << CSClist3F.size() + CSClist3B.size() << std::endl;
    std::cout << "In ME4 : " << CSClist4F.size() + CSClist4B.size() << std::endl;
  }

  /* ******************************************************************************************************************
   * Form seeds in barrel region
   *
   * Proceed from inside -> out
   * ******************************************************************************************************************/

  // Loop over all possible MB1 segment to form seeds:
  int index = -1;
  for (SegmentContainer::iterator it = DTlist1.begin(); it != DTlist1.end(); ++it) {
    index++;

    if (usedDTlist1[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minDTHitsPerSegment)
      continue;
    if ((*it)->dimension() != 4)
      continue;

    //double dof = static_cast<double>( (*it)->degreesOfFreedom() ) ;
    //if ( ((*it)->chi2()/dof) > 20000.0 ) continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(DTlist1, usedDTlist1, eta_temp, phi_temp, -1, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      //usedDTlist1[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(-1);

    // Try adding segment from other stations
    if (foundMatchingSegment(
            3, protoTrack, DTlist2, usedDTlist2, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(-2);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            3, protoTrack, DTlist3, usedDTlist3, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(-3);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            3, protoTrack, DTlist4, usedDTlist4, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(-4);
    if (showeringBefore)
      NShowers++;

    // Check if in overlap region
    if (eta_temp > 0.8) {
      if (foundMatchingSegment(
              2, protoTrack, CSClist1F, usedCSClist1F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(1);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist2F, usedCSClist2F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(2);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist3F, usedCSClist3F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(3);
      if (showeringBefore)
        NShowers++;
    } else if (eta_temp < -0.8) {
      if (foundMatchingSegment(
              2, protoTrack, CSClist1B, usedCSClist1B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(1);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist2B, usedCSClist2B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(2);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist3B, usedCSClist3B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(3);
      if (showeringBefore)
        NShowers++;
    }

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] > 0) {
          if (ShoweringLayers[i] <= layers[layers.size() - 1])
            continue;
          protoTrack.push_back(ShoweringSegments[i]);
          layers.push_back(ShoweringLayers[i]);
        }
        if (ShoweringLayers[i] < 0 && layers[layers.size() - 1] < 0) {
          if (ShoweringLayers[i] >= layers[layers.size() - 1])
            continue;
          protoTrack.push_back(ShoweringSegments[i]);
          layers.push_back(ShoweringLayers[i]);
        }
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    TrajectorySeed thisSeed;

    if (layers.size() < 2) {
      thisSeed = muonSeedCreate_->createSeed(4, protoTrack, layers, NShowers, NShowerSeg);
    } else {
      if (layers[layers.size() - 1] > 0) {
        thisSeed = muonSeedCreate_->createSeed(2, protoTrack, layers, NShowers, NShowerSeg);
      } else {
        thisSeed = muonSeedCreate_->createSeed(3, protoTrack, layers, NShowers, NShowerSeg);
      }
    }
    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());

    // Marked segment as used
    usedDTlist1[index] = true;
  }

  // Loop over all possible MB2 segment to form seeds:
  index = -1;
  for (SegmentContainer::iterator it = DTlist2.begin(); it != DTlist2.end(); ++it) {
    index++;

    if (usedDTlist2[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minDTHitsPerSegment)
      continue;
    if ((*it)->dimension() != 4)
      continue;

    //double dof = static_cast<double>( (*it)->degreesOfFreedom() ) ;
    //if ( ((*it)->chi2()/dof) > 20000.0 ) continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(DTlist2, usedDTlist2, eta_temp, phi_temp, -2, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      // usedDTlist2[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(-2);

    // Try adding segment from other stations
    if (foundMatchingSegment(
            3, protoTrack, DTlist3, usedDTlist3, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(-3);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            3, protoTrack, DTlist4, usedDTlist4, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(-4);
    if (showeringBefore)
      NShowers++;

    // Check if in overlap region
    if (eta_temp > 0.8) {
      if (foundMatchingSegment(
              2, protoTrack, CSClist1F, usedCSClist1F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(1);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist2F, usedCSClist2F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(2);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist3F, usedCSClist3F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(3);
      if (showeringBefore)
        NShowers++;
    } else if (eta_temp < -0.8) {
      if (foundMatchingSegment(
              2, protoTrack, CSClist1B, usedCSClist1B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(1);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist2B, usedCSClist2B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(2);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist3B, usedCSClist3B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(3);
      if (showeringBefore)
        NShowers++;
    }

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] > 0) {
          if (ShoweringLayers[i] <= layers[layers.size() - 1])
            continue;
          protoTrack.push_back(ShoweringSegments[i]);
          layers.push_back(ShoweringLayers[i]);
        }
        if (ShoweringLayers[i] < 0 && layers[layers.size() - 1] < 0) {
          if (ShoweringLayers[i] >= layers[layers.size() - 1])
            continue;
          protoTrack.push_back(ShoweringSegments[i]);
          layers.push_back(ShoweringLayers[i]);
        }
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    TrajectorySeed thisSeed;

    if (layers.size() < 2) {
      thisSeed = muonSeedCreate_->createSeed(4, protoTrack, layers, NShowers, NShowerSeg);
    } else {
      if (layers[layers.size() - 1] > 0) {
        thisSeed = muonSeedCreate_->createSeed(2, protoTrack, layers, NShowers, NShowerSeg);
      } else {
        thisSeed = muonSeedCreate_->createSeed(3, protoTrack, layers, NShowers, NShowerSeg);
      }
    }
    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());

    // Marked segment as used
    usedDTlist2[index] = true;
  }

  // Loop over all possible MB3 segment to form seeds:
  index = -1;
  for (SegmentContainer::iterator it = DTlist3.begin(); it != DTlist3.end(); ++it) {
    index++;

    if (usedDTlist3[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minDTHitsPerSegment)
      continue;
    if ((*it)->dimension() != 4)
      continue;

    //double dof = static_cast<double>( (*it)->degreesOfFreedom() ) ;
    //if ( ((*it)->chi2()/dof) > 20000.0 ) continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(DTlist3, usedDTlist3, eta_temp, phi_temp, -3, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      // usedDTlist3[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(-3);

    // Try adding segment from other stations
    if (foundMatchingSegment(
            3, protoTrack, DTlist4, usedDTlist4, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(-4);
    if (showeringBefore)
      NShowers++;

    // Check if in overlap region
    if (eta_temp > 0.8) {
      if (foundMatchingSegment(
              2, protoTrack, CSClist1F, usedCSClist1F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(1);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist2F, usedCSClist2F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(2);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist3F, usedCSClist3F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(3);
      if (showeringBefore)
        NShowers++;
    } else if (eta_temp < -0.8) {
      if (foundMatchingSegment(
              2, protoTrack, CSClist1B, usedCSClist1B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(1);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist2B, usedCSClist2B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(2);
      if (showeringBefore)
        NShowers++;
      if (foundMatchingSegment(
              2, protoTrack, CSClist3B, usedCSClist3B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
        layers.push_back(3);
      if (showeringBefore)
        NShowers++;
    }

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] > 0) {
          if (ShoweringLayers[i] <= layers[layers.size() - 1])
            continue;
          protoTrack.push_back(ShoweringSegments[i]);
          layers.push_back(ShoweringLayers[i]);
        }
        if (ShoweringLayers[i] < 0 && layers[layers.size() - 1] < 0) {
          if (ShoweringLayers[i] >= layers[layers.size() - 1])
            continue;
          protoTrack.push_back(ShoweringSegments[i]);
          layers.push_back(ShoweringLayers[i]);
        }
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    TrajectorySeed thisSeed;
    if (layers.size() < 2) {
      thisSeed = muonSeedCreate_->createSeed(4, protoTrack, layers, NShowers, NShowerSeg);
    } else {
      if (layers[layers.size() - 1] > 0) {
        thisSeed = muonSeedCreate_->createSeed(2, protoTrack, layers, NShowers, NShowerSeg);
      } else {
        thisSeed = muonSeedCreate_->createSeed(3, protoTrack, layers, NShowers, NShowerSeg);
      }
    }

    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());

    // Marked segment as used
    usedDTlist3[index] = true;
  }

  /* *********************************************************************************************************************
   * Form seeds from backward endcap
   *
   * Proceed from inside -> out
   * *********************************************************************************************************************/

  // Loop over all possible ME11 segment to form seeds:
  index = -1;

  for (SegmentContainer::iterator it = CSClist0B.begin(); it != CSClist0B.end(); ++it) {
    index++;

    if (usedCSClist0B[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minCSCHitsPerSegment)
      continue;

    //double dof = static_cast<double>( (*it)->degreesOfFreedom() ) ;
    //if ( ((*it)->chi2()/dof) > 20000.0 ) continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(CSClist0B, usedCSClist0B, eta_temp, phi_temp, 0, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      // usedCSClist0B[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(0);

    // Try adding segment from other station
    if (foundMatchingSegment(
            1, protoTrack, CSClist1B, usedCSClist1B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(1);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist2B, usedCSClist2B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(2);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist3B, usedCSClist3B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(3);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist4B, usedCSClist4B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(4);
    if (showeringBefore)
      NShowers++;

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] <= layers[layers.size() - 1])
          continue;
        protoTrack.push_back(ShoweringSegments[i]);
        layers.push_back(ShoweringLayers[i]);
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    TrajectorySeed thisSeed;
    if (layers.size() < 2) {
      thisSeed = muonSeedCreate_->createSeed(4, protoTrack, layers, NShowers, NShowerSeg);
    } else {
      if (fabs(gp.eta()) > 1.7) {
        thisSeed = muonSeedCreate_->createSeed(5, protoTrack, layers, NShowers, NShowerSeg);
      } else {
        thisSeed = muonSeedCreate_->createSeed(1, protoTrack, layers, NShowers, NShowerSeg);
      }
    }

    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());

    // mark this segment as used
    usedCSClist0B[index] = true;
  }

  // Loop over all possible ME1/2 ME1/3 segment to form seeds:
  index = -1;
  for (SegmentContainer::iterator it = CSClist1B.begin(); it != CSClist1B.end(); ++it) {
    index++;

    if (usedCSClist1B[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minCSCHitsPerSegment)
      continue;

    //double dof = static_cast<double>( (*it)->degreesOfFreedom() ) ;
    //if ( ((*it)->chi2()/dof) > 20000.0 ) continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(CSClist1B, usedCSClist1B, eta_temp, phi_temp, 1, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      //    usedCSClist1B[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(1);

    // Try adding segment from other stations
    if (foundMatchingSegment(
            1, protoTrack, CSClist2B, usedCSClist2B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(2);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist3B, usedCSClist3B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(3);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist4B, usedCSClist4B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(4);
    if (showeringBefore)
      NShowers++;

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] <= layers[layers.size() - 1])
          continue;
        protoTrack.push_back(ShoweringSegments[i]);
        layers.push_back(ShoweringLayers[i]);
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    TrajectorySeed thisSeed;
    if (layers.size() < 2) {
      thisSeed = muonSeedCreate_->createSeed(4, protoTrack, layers, NShowers, NShowerSeg);
    } else {
      thisSeed = muonSeedCreate_->createSeed(1, protoTrack, layers, NShowers, NShowerSeg);
    }
    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());

    // mark this segment as used
    usedCSClist1B[index] = true;
  }

  // Loop over all possible ME2 segment to form seeds:
  index = -1;
  for (SegmentContainer::iterator it = CSClist2B.begin(); it != CSClist2B.end(); ++it) {
    index++;

    if (usedCSClist2B[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minCSCHitsPerSegment)
      continue;

    double dof = static_cast<double>((*it)->degreesOfFreedom());
    if (((*it)->chi2() / dof) > 20000.0)
      continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(CSClist2B, usedCSClist2B, eta_temp, phi_temp, 2, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      // usedCSClist2B[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(2);

    // Try adding segment from other stations
    if (foundMatchingSegment(
            1, protoTrack, CSClist3B, usedCSClist3B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(3);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist4B, usedCSClist4B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(4);
    if (showeringBefore)
      NShowers++;

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] <= layers[layers.size() - 1])
          continue;
        protoTrack.push_back(ShoweringSegments[i]);
        layers.push_back(ShoweringLayers[i]);
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    TrajectorySeed thisSeed;
    if (layers.size() < 2) {
      thisSeed = muonSeedCreate_->createSeed(4, protoTrack, layers, NShowers, NShowerSeg);
    } else {
      thisSeed = muonSeedCreate_->createSeed(1, protoTrack, layers, NShowers, NShowerSeg);
    }

    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());
    // mark this segment as used
    usedCSClist2B[index] = true;
  }

  // Loop over all possible ME3 segment to form seeds:
  index = -1;
  for (SegmentContainer::iterator it = CSClist3B.begin(); it != CSClist3B.end(); ++it) {
    index++;

    if (usedCSClist3B[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minCSCHitsPerSegment)
      continue;

    double dof = static_cast<double>((*it)->degreesOfFreedom());
    if (((*it)->chi2() / dof) > 20000.0)
      continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(CSClist3B, usedCSClist3B, eta_temp, phi_temp, 3, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      //    usedCSClist3B[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(2);

    // Try adding segment from other stations
    if (foundMatchingSegment(
            1, protoTrack, CSClist4B, usedCSClist4B, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(4);
    if (showeringBefore)
      NShowers++;

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] <= layers[layers.size() - 1])
          continue;
        protoTrack.push_back(ShoweringSegments[i]);
        layers.push_back(ShoweringLayers[i]);
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    // mark this segment as used
    usedCSClist3B[index] = true;

    if (layers.size() < 2)
      continue;
    TrajectorySeed thisSeed = muonSeedCreate_->createSeed(1, protoTrack, layers, NShowers, NShowerSeg);

    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());
  }

  /* *****************************************************************************************************************
   * Form seeds from forward endcap
   *
   * Proceed from inside -> out
   * *****************************************************************************************************************/

  // Loop over all possible ME11 segment to form seeds:
  index = -1;
  for (SegmentContainer::iterator it = CSClist0F.begin(); it != CSClist0F.end(); ++it) {
    index++;

    if (usedCSClist0F[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minCSCHitsPerSegment)
      continue;

    //double dof = static_cast<double>( (*it)->degreesOfFreedom() ) ;
    //if ( ((*it)->chi2()/dof) > 20000.0 ) continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(CSClist0F, usedCSClist0F, eta_temp, phi_temp, 0, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      // usedCSClist0F[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(0);

    // Try adding segment from other station
    if (foundMatchingSegment(
            1, protoTrack, CSClist1F, usedCSClist1F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(1);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist2F, usedCSClist2F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(2);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist3F, usedCSClist3F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(3);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist4F, usedCSClist4F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(4);
    if (showeringBefore)
      NShowers++;

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] <= layers[layers.size() - 1])
          continue;
        protoTrack.push_back(ShoweringSegments[i]);
        layers.push_back(ShoweringLayers[i]);
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    TrajectorySeed thisSeed;
    if (layers.size() < 2) {
      thisSeed = muonSeedCreate_->createSeed(4, protoTrack, layers, NShowers, NShowerSeg);
    } else {
      if (fabs(gp.eta()) > 1.7) {
        thisSeed = muonSeedCreate_->createSeed(5, protoTrack, layers, NShowers, NShowerSeg);
      } else {
        thisSeed = muonSeedCreate_->createSeed(1, protoTrack, layers, NShowers, NShowerSeg);
      }
    }
    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());

    // mark this segment as used
    usedCSClist0F[index] = true;
  }

  // Loop over all possible ME1/2 ME1/3 segment to form seeds:
  index = -1;
  for (SegmentContainer::iterator it = CSClist1F.begin(); it != CSClist1F.end(); ++it) {
    index++;

    if (usedCSClist1F[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minCSCHitsPerSegment)
      continue;

    //double dof = static_cast<double>( (*it)->degreesOfFreedom() ) ;
    //if ( ((*it)->chi2()/dof) > 20000.0 ) continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(CSClist1F, usedCSClist1F, eta_temp, phi_temp, 1, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      //   usedCSClist1F[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(1);

    // Try adding segment from other stations
    if (foundMatchingSegment(
            1, protoTrack, CSClist2F, usedCSClist2F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(2);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist3F, usedCSClist3F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(3);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist4F, usedCSClist4F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(4);
    if (showeringBefore)
      NShowers++;

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] <= layers[layers.size() - 1])
          continue;
        protoTrack.push_back(ShoweringSegments[i]);
        layers.push_back(ShoweringLayers[i]);
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    TrajectorySeed thisSeed;
    if (layers.size() < 2) {
      thisSeed = muonSeedCreate_->createSeed(4, protoTrack, layers, NShowers, NShowerSeg);
    } else {
      thisSeed = muonSeedCreate_->createSeed(1, protoTrack, layers, NShowers, NShowerSeg);
    }

    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());

    // mark this segment as used
    usedCSClist1F[index] = true;
  }

  // Loop over all possible ME2 segment to form seeds:
  index = -1;
  for (SegmentContainer::iterator it = CSClist2F.begin(); it != CSClist2F.end(); ++it) {
    index++;

    if (usedCSClist2F[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minCSCHitsPerSegment)
      continue;

    double dof = static_cast<double>((*it)->degreesOfFreedom());
    if (((*it)->chi2() / dof) > 20000.0)
      continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(CSClist2F, usedCSClist2F, eta_temp, phi_temp, 2, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      //    usedCSClist2F[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(2);

    // Try adding segment from other stations
    if (foundMatchingSegment(
            1, protoTrack, CSClist3F, usedCSClist3F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(3);
    if (showeringBefore)
      NShowers++;
    if (foundMatchingSegment(
            1, protoTrack, CSClist4F, usedCSClist4F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(4);
    if (showeringBefore)
      NShowers++;

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] <= layers[layers.size() - 1])
          continue;
        protoTrack.push_back(ShoweringSegments[i]);
        layers.push_back(ShoweringLayers[i]);
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    TrajectorySeed thisSeed;
    if (layers.size() < 2) {
      thisSeed = muonSeedCreate_->createSeed(4, protoTrack, layers, NShowers, NShowerSeg);
    } else {
      thisSeed = muonSeedCreate_->createSeed(1, protoTrack, layers, NShowers, NShowerSeg);
    }

    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());

    // mark this segment as used
    usedCSClist2F[index] = true;
  }

  // Loop over all possible ME3 segment to form seeds:
  index = -1;
  for (SegmentContainer::iterator it = CSClist3F.begin(); it != CSClist3F.end(); ++it) {
    index++;

    if (usedCSClist3F[index] == true)
      continue;
    if (int((*it)->recHits().size()) < minCSCHitsPerSegment)
      continue;

    double dof = static_cast<double>((*it)->degreesOfFreedom());
    if (((*it)->chi2() / dof) > 20000.0)
      continue;

    // Global position of starting point for protoTrack
    GlobalPoint gp = (*it)->globalPosition();
    float eta_temp = gp.eta();
    float phi_temp = gp.phi();
    bool showeringBefore = false;
    NShowerSeg = 0;
    if (IdentifyShowering(CSClist3F, usedCSClist3F, eta_temp, phi_temp, 3, NShowerSeg))
      showeringBefore = true;
    int NShowers = 0;
    if (showeringBefore) {
      //   usedCSClist3F[index] = true;
      NShowers++;
    }

    SegmentContainer protoTrack;
    protoTrack.push_back(*it);

    std::vector<int> layers;
    layers.push_back(2);

    // Try adding segment from other stations
    if (foundMatchingSegment(
            1, protoTrack, CSClist4F, usedCSClist4F, eta_temp, phi_temp, layers[layers.size() - 1], showeringBefore))
      layers.push_back(4);
    if (showeringBefore)
      NShowers++;

    // adding showering information
    if (layers.size() < 2 && !ShoweringSegments.empty()) {
      for (size_t i = 0; i < ShoweringSegments.size(); i++) {
        if (ShoweringLayers[i] <= layers[layers.size() - 1])
          continue;
        protoTrack.push_back(ShoweringSegments[i]);
        layers.push_back(ShoweringLayers[i]);
      }
    }
    ShoweringSegments.clear();
    ShoweringLayers.clear();

    // mark this segment as used
    usedCSClist3F[index] = true;

    if (layers.size() < 2)
      continue;

    TrajectorySeed thisSeed = muonSeedCreate_->createSeed(1, protoTrack, layers, NShowers, NShowerSeg);

    // Add the seeds to master collection
    rawSeeds.push_back(thisSeed);
    etaOfSeed.push_back(eta_temp);
    phiOfSeed.push_back(phi_temp);
    nSegOnSeed.push_back(protoTrack.size());
  }

  /* *********************************************************************************************************************
   * Clean up raw seed collection and pass to master collection
   * *********************************************************************************************************************/

  if (debug)
    std::cout << "*** CLEAN UP " << std::endl;
  if (debug)
    std::cout << "Number of seeds BEFORE " << rawSeeds.size() << std::endl;

  int goodSeeds = 0;

  theSeeds = muonSeedClean_->seedCleaner(eventSetup, rawSeeds);
  goodSeeds = theSeeds.size();

  //std::cout << " === Before Cleaning : " << rawSeeds.size() <<std::endl;
  //std::cout << " => AFTER :" << goodSeeds << std::endl;

  if (debug)
    std::cout << "Number of seeds AFTER " << goodSeeds << std::endl;

  return goodSeeds;
}

etaError()

double MuonSeedBuilder::etaError ( const GlobalPoint  gp, double  rErr  )

private

calculate the eta error from global R error

Definition at line 1457 of file MuonSeedBuilder.cc.

References runTauDisplay::gp.

                                                                  {
  double dHdTheta = 0.0;
  double dThetadR = 0.0;
  double etaErr = 1.0;

  if (gp.perp() != 0) {
    dHdTheta = (gp.mag() + gp.z()) / gp.perp();
    dThetadR = gp.z() / gp.perp2();
    etaErr = 0.25 * (dHdTheta * dThetadR) * (dHdTheta * dThetadR) * rErr;
  }

  return etaErr;
}

foundMatchingSegment()

bool MuonSeedBuilder::foundMatchingSegment ( int  type, SegmentContainer &  protoTrack, SegmentContainer &  segments, BoolContainer &  usedSeg, float &  eta_temp, float &  phi_temp, int &  lastLayer, bool &  showeringBefore  )

private

Find segment which matches protoTrack for endcap only.

segment for seeding , segments collection

reject possible edge segments

Definition at line 1235 of file MuonSeedBuilder.cc.

References hgcalPerformanceValidation::df, cuy::dh, HGC3DClusterGenMatchSelector_cfi::dR, PV3DBase< T, PVType, FrameType >::eta(), IdentifyShowering(), maxDeltaEtaCSC, maxDeltaEtaDT, maxDeltaEtaOverlap, maxDeltaPhiCSC, maxDeltaPhiDT, maxDeltaPhiOverlap, mkfit::Config::maxdEta, mkfit::Config::maxdPhi, minCSCHitsPerSegment, minDTHitsPerSegment, muonSeedClean_, MuonSeedCleaner::NRecHitsFromSegment(), NShowerSeg, convertSQLiteXML::ok, PV3DBase< T, PVType, FrameType >::phi(), mathSSE::sqrt(), and funct::true.

Referenced by build().

                                                                  {
  bool ok = false;
  int scanlayer = (lastLayer < 0) ? (lastLayer - 1) : (lastLayer + 1);

  if (IdentifyShowering(segs, usedSeg, eta_last, phi_last, scanlayer, NShowerSeg)) {
    showeringBefore = true;
    return ok;
  }

  // Setup the searching cone-size
  // searching cone-size should changes with bending power
  double maxdEta;
  double maxdPhi;
  if (type == 1) {
    // CSC
    maxdEta = maxDeltaEtaCSC;
    if (lastLayer == 0 || lastLayer == 1) {
      if (fabs(eta_last) < 2.1) {
        maxdPhi = maxDeltaPhiCSC;
      } else {
        maxdPhi = 0.06;
      }
    } else if (lastLayer == 2) {
      maxdPhi = 0.5 * maxDeltaPhiCSC;
    } else {
      maxdPhi = 0.2 * maxDeltaPhiCSC;
    }

  } else if (type == 2) {
    // Overlap
    maxdEta = maxDeltaEtaOverlap;
    if (lastLayer == -1) {
      maxdPhi = maxDeltaPhiDT;
    } else {
      maxdPhi = maxDeltaPhiOverlap;
    }

  } else {
    // DT
    maxdEta = maxDeltaEtaDT;
    if (lastLayer == -1) {
      maxdPhi = maxDeltaPhiDT;
    } else if (lastLayer == -2) {
      maxdPhi = 0.8 * maxDeltaPhiDT;
    } else {
      maxdPhi = 0.4 * maxDeltaPhiDT;
    }
  }

  // if previous layer showers, limite the maxdPhi < 0.06
  if (showeringBefore && maxdPhi > 0.03)
    maxdPhi = 0.03;
  // reset the showering flag
  showeringBefore = false;

  // global phi/eta from previous segment
  float eta_temp = eta_last;
  float phi_temp = phi_last;

  // Index counter to keep track of element used in segs
  int index = -1;
  int best_match = index;
  float best_R = sqrt((maxdEta * maxdEta) + (maxdPhi * maxdPhi));
  float best_chi2 = 200;
  int best_dimension = 2;
  int best_nhits = minDTHitsPerSegment;
  if (type == 1)
    best_nhits = minCSCHitsPerSegment;
  // Loop over segments in other station (layer) and find candidate match
  for (SegmentContainer::iterator it = segs.begin(); it != segs.end(); ++it) {
    index++;

    // Not to get confused:  eta_last is from the previous layer.
    // This is only to find the best set of segments by comparing at the distance layer-by-layer
    GlobalPoint gp2 = (*it)->globalPosition();
    double dh = fabs(gp2.eta() - eta_temp);
    double df = fabs(gp2.phi() - phi_temp);
    double dR = sqrt((dh * dh) + (df * df));

    // dEta and dPhi should be within certain range
    bool case1 = (dh < maxdEta && df < maxdPhi) ? true : false;
    // for DT station 4 ; CSCSegment is always 4D
    bool case2 = (((*it)->dimension() != 4) && (dh < 0.5) && (df < maxdPhi)) ? true : false;
    if (!case1 && !case2)
      continue;

    int NRechits = muonSeedClean_->NRecHitsFromSegment(&*(*it));

    if (NRechits < best_nhits)
      continue;
    best_nhits = NRechits;

    // reject 2D segments if 4D segments are available
    if ((*it)->dimension() < best_dimension)
      continue;
    best_dimension = (*it)->dimension();

    // pick the segment with best chi2/dof within a fixed cone size
    if (dR > best_R)
      continue;

    // select smaller chi2/dof
    double dof = static_cast<double>((*it)->degreesOfFreedom());
    if ((*it)->chi2() / dof < 0.001 && NRechits < 6 && type == 1)
      continue;
    if ((*it)->chi2() / dof > best_chi2)
      continue;
    best_chi2 = (*it)->chi2() / dof;
    best_match = index;
    // propagate the eta and phi to next layer
    if ((*it)->dimension() != 4) {
      // Self assignment, is this a bug??
      // should this have been (phi/eta)_last = (phi/eta)_temp to make it reset?
      //phi_last = phi_last;
      //eta_last = eta_last;
    } else {
      phi_last = gp2.phi();
      eta_last = gp2.eta();
    }
  }

  if (best_match < 0)
    return ok;

  // Add best matching segment to protoTrack:
  index = -1;
  for (SegmentContainer::iterator it = segs.begin(); it != segs.end(); ++it) {
    index++;
    if (index != best_match)
      continue;
    protoTrack.push_back(*it);
    usedSeg[best_match] = true;
    ok = true;
  }
  return ok;
}

IdentifyShowering()

bool MuonSeedBuilder::IdentifyShowering ( SegmentContainer &  segs, BoolContainer &  usedSeg, float &  eta_last, float &  phi_last, int  layer, int &  NShoweringSegments  )

private

identify the showering layer

Definition at line 1380 of file MuonSeedBuilder.cc.

References hgcalPerformanceValidation::df, cuy::dh, HGC3DClusterGenMatchSelector_cfi::dR, MuonSubdetId::DT, runTauDisplay::gp, GeomDetEnumerators::isDT(), phase1PixelTopology::layer, muonSeedClean_, MuonSeedCleaner::NRecHitsFromSegment(), ShoweringLayers, ShoweringSegments, mathSSE::sqrt(), and DetId::subdetId().

Referenced by build(), and foundMatchingSegment().

                                                                 {
  bool showering = false;

  int nSeg = 0;
  int nRhits = 0;
  double nChi2 = 9999.;
  int theOrigin = -1;
  std::vector<int> badtag;
  int index = -1;
  double aveEta = 0.0;
  for (SegmentContainer::iterator it = segs.begin(); it != segs.end(); ++it) {
    index++;
    GlobalPoint gp = (*it)->globalPosition();
    double dh = gp.eta() - eta_last;
    double df = gp.phi() - phi_last;
    double dR = sqrt((dh * dh) + (df * df));

    double dof = static_cast<double>((*it)->degreesOfFreedom());
    double nX2 = (*it)->chi2() / dof;

    bool isDT = false;
    DetId geoId = (*it)->geographicalId();
    if (geoId.subdetId() == MuonSubdetId::DT)
      isDT = true;

    if (dR < 0.3) {
      nSeg++;
      badtag.push_back(index);
      aveEta += fabs(gp.eta());
      // pick up the best segment from showering chamber
      int rh = muonSeedClean_->NRecHitsFromSegment(&*(*it));
      if (rh < 6 && !isDT)
        continue;
      if (rh < 12 && isDT)
        continue;
      if (rh > nRhits) {
        nRhits = rh;
        if (nX2 > nChi2)
          continue;
        if (layer != 0 && layer != 1 && layer != -1) {
          theOrigin = index;
        }
      }
    }
  }
  aveEta = aveEta / static_cast<double>(nSeg);
  bool isME11A = (aveEta >= 2.1 && layer == 0) ? true : false;
  bool isME12 = (aveEta > 1.2 && aveEta <= 1.65 && layer == 1) ? true : false;
  bool isME11 = (aveEta > 1.65 && aveEta <= 2.1 && layer == 0) ? true : false;
  bool is1stLayer = (layer == -1 || layer == 0 || isME12 || isME11 || isME11A) ? true : false;

  NShoweringSegments += nSeg;

  if (nSeg > 3 && !isME11A)
    showering = true;
  if (nSeg > 6 && isME11A)
    showering = true;

  // if showering, flag all segments in order to skip this layer for pt estimation except 1st layer
  //std::cout<<" from Showering "<<std::endl;
  if (showering && !is1stLayer) {
    for (std::vector<int>::iterator it = badtag.begin(); it != badtag.end(); ++it) {
      usedSeg[*it] = true;
      if ((*it) != theOrigin)
        continue;
      ShoweringSegments.push_back(segs[*it]);
      ShoweringLayers.push_back(layer);
    }
  }
  return showering;
}

seedCleaner()

std::vector<TrajectorySeed> MuonSeedBuilder::seedCleaner ( const edm::EventSetup &  eventSetup, std::vector< TrajectorySeed > &  seeds  )

private

cleaning the seeds

setBField()

void MuonSeedBuilder::setBField ( const MagneticField *  theField )

inline

Cache pointer to Magnetic field.

Definition at line 47 of file MuonSeedBuilder.h.

References BField.

Referenced by MuonSeedProducer::produce().

{ BField = theField; }

setGeometry()

void MuonSeedBuilder::setGeometry ( const MuonDetLayerGeometry *  lgeom )

inline

Cache pointer to geometry.

Definition at line 44 of file MuonSeedBuilder.h.

References muonLayers.

Referenced by MuonSeedProducer::produce().

{ muonLayers = lgeom; }

Member Data Documentation

badSeedLayer

std::vector<int> MuonSeedBuilder::badSeedLayer

Definition at line 52 of file MuonSeedBuilder.h.

BField

const MagneticField* MuonSeedBuilder::BField

private

Definition at line 146 of file MuonSeedBuilder.h.

Referenced by build(), and setBField().

debug

bool MuonSeedBuilder::debug

private

group the seeds

pick the seed by better parameter error filter out the bad pt seeds, if all are bad pt seeds then keep all collect long seeds pick the seeds w/ 1st layer information and w/ more than 1 segments check overlapping segment for seeds retrieve number of rechits& normalized chi2 of associated segments of a seed retrieve seed global position retrieve seed global momentum

Definition at line 106 of file MuonSeedBuilder.h.

Referenced by build(), runTauIdMVA.TauIDEmbedder::loadMVA_WPs_run2_2017(), MuonSeedBuilder(), and runTauIdMVA.TauIDEmbedder::runTauID().

enableCSCMeasurement

bool MuonSeedBuilder::enableCSCMeasurement

private

Definition at line 112 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

enableDTMeasurement

bool MuonSeedBuilder::enableDTMeasurement

private

Definition at line 109 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

maxDeltaEtaCSC

float MuonSeedBuilder::maxDeltaEtaCSC

private

Definition at line 121 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

maxDeltaEtaDT

float MuonSeedBuilder::maxDeltaEtaDT

private

Definition at line 125 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

maxDeltaEtaOverlap

float MuonSeedBuilder::maxDeltaEtaOverlap

private

Definition at line 123 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

maxDeltaPhiCSC

float MuonSeedBuilder::maxDeltaPhiCSC

private

Definition at line 122 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

maxDeltaPhiDT

float MuonSeedBuilder::maxDeltaPhiDT

private

Definition at line 126 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

maxDeltaPhiOverlap

float MuonSeedBuilder::maxDeltaPhiOverlap

private

Definition at line 124 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

maxEtaResolutionCSC

float MuonSeedBuilder::maxEtaResolutionCSC

private

Definition at line 151 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

maxEtaResolutionDT

float MuonSeedBuilder::maxEtaResolutionDT

private

Definition at line 150 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

maxPhiResolutionCSC

float MuonSeedBuilder::maxPhiResolutionCSC

private

Definition at line 153 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

maxPhiResolutionDT

float MuonSeedBuilder::maxPhiResolutionDT

private

Definition at line 152 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

minCSCHitsPerSegment

int MuonSeedBuilder::minCSCHitsPerSegment

private

Definition at line 115 of file MuonSeedBuilder.h.

Referenced by build(), foundMatchingSegment(), and MuonSeedBuilder().

minDTHitsPerSegment

int MuonSeedBuilder::minDTHitsPerSegment

private

Definition at line 118 of file MuonSeedBuilder.h.

Referenced by build(), foundMatchingSegment(), and MuonSeedBuilder().

muonLayers

const MuonDetLayerGeometry* MuonSeedBuilder::muonLayers

private

Definition at line 143 of file MuonSeedBuilder.h.

Referenced by build(), and setGeometry().

muonMeasurements

MuonDetLayerMeasurements* MuonSeedBuilder::muonMeasurements

private

Definition at line 156 of file MuonSeedBuilder.h.

Referenced by build(), MuonSeedBuilder(), and ~MuonSeedBuilder().

muonSeedClean_

MuonSeedCleaner* MuonSeedBuilder::muonSeedClean_

private

Definition at line 140 of file MuonSeedBuilder.h.

Referenced by build(), foundMatchingSegment(), IdentifyShowering(), MuonSeedBuilder(), and ~MuonSeedBuilder().

muonSeedCreate_

MuonSeedCreator* MuonSeedBuilder::muonSeedCreate_

private

Create seed according to region (CSC, DT, Overlap)

Definition at line 139 of file MuonSeedBuilder.h.

Referenced by build(), MuonSeedBuilder(), and ~MuonSeedBuilder().

NShowerSeg

int MuonSeedBuilder::NShowerSeg

private

Definition at line 129 of file MuonSeedBuilder.h.

Referenced by build(), and foundMatchingSegment().

ShoweringLayers

std::vector<int> MuonSeedBuilder::ShoweringLayers

private

Definition at line 131 of file MuonSeedBuilder.h.

Referenced by build(), and IdentifyShowering().

ShoweringSegments

SegmentContainer MuonSeedBuilder::ShoweringSegments

private

Definition at line 130 of file MuonSeedBuilder.h.

Referenced by build(), and IdentifyShowering().

theCSCSegmentLabel

edm::InputTag MuonSeedBuilder::theCSCSegmentLabel

private

Name of the CSC segment collection.

Definition at line 136 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

theDTSegmentLabel

edm::InputTag MuonSeedBuilder::theDTSegmentLabel

private

Name of the DT segment collection.

Definition at line 133 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

theMinMomentum

float MuonSeedBuilder::theMinMomentum

private

Definition at line 154 of file MuonSeedBuilder.h.