CMS 3D CMS Logo

Public Types | Public Member Functions | Public Attributes | Private Member Functions | Private Attributes

MuonSeedBuilder Class Reference

#include <MuonSeedBuilder.h>

List of all members.

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.
 MuonSeedBuilder (const edm::ParameterSet &)
 Constructor.
void setBField (const MagneticField *theField)
 Cache pointer to Magnetic field.
void setGeometry (const MuonDetLayerGeometry *lgeom)
 Cache pointer to geometry.
 ~MuonSeedBuilder ()
 Destructor.

Public Attributes

std::vector< int > badSeedLayer

Private Member Functions

double etaError (const GlobalPoint gp, double rErr)
 calculate the eta error from global R error
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.
bool IdentifyShowering (SegmentContainer &segs, BoolContainer &usedSeg, float &eta_last, float &phi_last, int layer, int &NShoweringSegments)
 identify the showering layer
std::vector< TrajectorySeedseedCleaner (const edm::EventSetup &eventSetup, std::vector< TrajectorySeed > &seeds)
 cleaning the seeds

Private Attributes

const MagneticFieldBField
bool debug
 group the seeds
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 MuonDetLayerGeometrymuonLayers
MuonSeedCleanermuonSeedClean_
MuonSeedCreatormuonSeedCreate_
 Create seed according to region (CSC, DT, Overlap)
int NShowerSeg
std::vector< int > ShoweringLayers
SegmentContainer ShoweringSegments
edm::InputTag theCSCSegmentLabel
 Name of the CSC segment collection.
edm::InputTag theDTSegmentLabel
 Name of the DT segment collection.
float theMinMomentum
MuonServiceProxytheService

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 32 of file MuonSeedBuilder.h.


Member Typedef Documentation

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

Definition at line 38 of file MuonSeedBuilder.h.

Definition at line 37 of file MuonSeedBuilder.h.


Constructor & Destructor Documentation

MuonSeedBuilder::MuonSeedBuilder ( const edm::ParameterSet pset) [explicit]

Constructor.

See header file for a description of this class.

Author:
Shih-Chuan Kao, Dominique Fortin - UCR

Definition at line 52 of file MuonSeedBuilder.cc.

References debug, enableCSCMeasurement, enableDTMeasurement, edm::ParameterSet::getParameter(), maxDeltaEtaCSC, maxDeltaEtaDT, maxDeltaEtaOverlap, maxDeltaPhiCSC, maxDeltaPhiDT, maxDeltaPhiOverlap, maxEtaResolutionCSC, maxEtaResolutionDT, maxPhiResolutionCSC, maxPhiResolutionDT, minCSCHitsPerSegment, minDTHitsPerSegment, muonSeedClean_, muonSeedCreate_, MuonServiceProxy_cff::MuonServiceProxy, theCSCSegmentLabel, theDTSegmentLabel, and theService.

                                                           {

  // 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"); 

  // muon service
  edm::ParameterSet serviceParameters = pset.getParameter<edm::ParameterSet>("ServiceParameters");
  theService        = new MuonServiceProxy(serviceParameters);

  // Class for forming muon seeds
  muonSeedCreate_   = new MuonSeedCreator( pset ); 
  muonSeedClean_    = new MuonSeedCleaner( pset ); 

}
MuonSeedBuilder::~MuonSeedBuilder ( )

Destructor.

Definition at line 98 of file MuonSeedBuilder.cc.

References muonSeedClean_, muonSeedCreate_, and theService.

                                 {

  delete muonSeedCreate_;
  delete muonSeedClean_;
  if (theService) delete theService;
}

Member Function Documentation

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

Build seed collection.

Definition at line 113 of file MuonSeedBuilder.cc.

References MuonDetLayerGeometry::allDTLayers(), MuonDetLayerGeometry::backwardCSCLayers(), BField, gather_cfg::cout, MuonSeedCreator::createSeed(), debug, enableCSCMeasurement, enableDTMeasurement, PV3DBase< T, PVType, FrameType >::eta(), MuonDetLayerGeometry::forwardCSCLayers(), foundMatchingSegment(), i, IdentifyShowering(), getHLTprescales::index, minCSCHitsPerSegment, minDTHitsPerSegment, muonLayers, muonSeedClean_, muonSeedCreate_, NShowerSeg, PV3DBase< T, PVType, FrameType >::phi(), MuonDetLayerMeasurements::recHits(), MuonSeedCleaner::seedCleaner(), MuonSeedCreator::setBField(), ShoweringLayers, ShoweringSegments, theCSCSegmentLabel, theDTSegmentLabel, and funct::true.

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(theDTSegmentLabel,theCSCSegmentLabel,edm::InputTag(),
                                            enableDTMeasurement,enableCSCMeasurement,false);

 // 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<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<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<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.size() > 0 ) {
       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.size() > 0 ) {
       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.size() > 0 ) {
       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.size() > 0 ) {
       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.size() > 0 ) {
       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.size() > 0 ) {
       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.size() > 0 ) {
       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.size() > 0 ) {
       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.size() > 0 ) {
       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.size() > 0 ) {
       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.size() > 0 ) {
       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;
}
double MuonSeedBuilder::etaError ( const GlobalPoint  gp,
double  rErr 
) [private]

calculate the eta error from global R error

Definition at line 1273 of file MuonSeedBuilder.cc.

References PV3DBase< T, PVType, FrameType >::mag(), PV3DBase< T, PVType, FrameType >::perp(), PV3DBase< T, PVType, FrameType >::perp2(), and PV3DBase< T, PVType, FrameType >::z().

                                                                  {

  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;
}
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 1085 of file MuonSeedBuilder.cc.

References case1, case2, PFRecoTauDiscriminationAgainstElectronDeadECAL_cfi::dR, PV3DBase< T, PVType, FrameType >::eta(), funct::false, IdentifyShowering(), getHLTprescales::index, maxDeltaEtaCSC, maxDeltaEtaDT, maxDeltaEtaOverlap, maxDeltaPhiCSC, maxDeltaPhiDT, maxDeltaPhiOverlap, minCSCHitsPerSegment, minDTHitsPerSegment, muonSeedClean_, MuonSeedCleaner::NRecHitsFromSegment(), NShowerSeg, convertSQLiteXML::ok, PV3DBase< T, PVType, FrameType >::phi(), and mathSSE::sqrt().

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 ) {
       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; 
}
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 1204 of file MuonSeedBuilder.cc.

References PFRecoTauDiscriminationAgainstElectronDeadECAL_cfi::dR, GeomDetEnumerators::DT, PV3DBase< T, PVType, FrameType >::eta(), funct::false, getHLTprescales::index, muonSeedClean_, MuonSeedCleaner::NRecHitsFromSegment(), PV3DBase< T, PVType, FrameType >::phi(), ShoweringLayers, ShoweringSegments, mathSSE::sqrt(), DetId::subdetId(), and funct::true.

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 ;

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

cleaning the seeds

void MuonSeedBuilder::setBField ( const MagneticField theField) [inline]

Cache pointer to Magnetic field.

Definition at line 52 of file MuonSeedBuilder.h.

References BField.

Referenced by MuonSeedProducer::produce().

{BField = theField;}
void MuonSeedBuilder::setGeometry ( const MuonDetLayerGeometry lgeom) [inline]

Cache pointer to geometry.

Definition at line 49 of file MuonSeedBuilder.h.

References muonLayers.

Referenced by MuonSeedProducer::produce().

{muonLayers = lgeom;}

Member Data Documentation

Definition at line 57 of file MuonSeedBuilder.h.

Definition at line 144 of file MuonSeedBuilder.h.

Referenced by build(), and setBField().

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 104 of file MuonSeedBuilder.h.

Referenced by build(), and MuonSeedBuilder().

Definition at line 110 of file MuonSeedBuilder.h.

Referenced by build(), and MuonSeedBuilder().

Definition at line 107 of file MuonSeedBuilder.h.

Referenced by build(), and MuonSeedBuilder().

Definition at line 119 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

Definition at line 123 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

Definition at line 121 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

Definition at line 120 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

Definition at line 124 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

Definition at line 122 of file MuonSeedBuilder.h.

Referenced by foundMatchingSegment(), and MuonSeedBuilder().

Definition at line 152 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

Definition at line 151 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

Definition at line 154 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

Definition at line 153 of file MuonSeedBuilder.h.

Referenced by MuonSeedBuilder().

Definition at line 113 of file MuonSeedBuilder.h.

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

Definition at line 116 of file MuonSeedBuilder.h.

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

Definition at line 141 of file MuonSeedBuilder.h.

Referenced by build(), and setGeometry().

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

Definition at line 137 of file MuonSeedBuilder.h.

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

Definition at line 127 of file MuonSeedBuilder.h.

Referenced by build(), and foundMatchingSegment().

std::vector<int> MuonSeedBuilder::ShoweringLayers [private]

Definition at line 129 of file MuonSeedBuilder.h.

Referenced by build(), and IdentifyShowering().

Definition at line 128 of file MuonSeedBuilder.h.

Referenced by build(), and IdentifyShowering().

Name of the CSC segment collection.

Definition at line 134 of file MuonSeedBuilder.h.

Referenced by build(), and MuonSeedBuilder().

Name of the DT segment collection.

Definition at line 131 of file MuonSeedBuilder.h.

Referenced by build(), and MuonSeedBuilder().

Definition at line 155 of file MuonSeedBuilder.h.

Definition at line 147 of file MuonSeedBuilder.h.

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