MuonSeedFromRecHits Class Reference

#include <MuonSeedFromRecHits.h>

Inheritance diagram for MuonSeedFromRecHits:

Public Member Functions
void	add (MuonTransientTrackingRecHit::MuonRecHitPointer hit)
void	clear ()
TrajectorySeed	createSeed (float ptmean, float sptmean, MuonTransientTrackingRecHit::ConstMuonRecHitPointer last) const
MuonTransientTrackingRecHit::ConstMuonRecHitPointer	firstRecHit () const
	MuonSeedFromRecHits ()
unsigned int	nrhit () const
void	setBField (const MagneticField *field)
void	setPtExtractor (const MuonSeedPtExtractor *extractor)
virtual	~MuonSeedFromRecHits ()

Protected Types
typedef MuonTransientTrackingRecHit::ConstMuonRecHitPointer	ConstMuonRecHitPointer
typedef MuonTransientTrackingRecHit::MuonRecHitContainer	MuonRecHitContainer
typedef MuonTransientTrackingRecHit::MuonRecHitPointer	MuonRecHitPointer

Protected Attributes
const MagneticField *	theField
const MuonSeedPtExtractor *	thePtExtractor
MuonTransientTrackingRecHit::MuonRecHitContainer	theRhits

Detailed Description

Author

A. Vitelli - INFN Torino

porting R.Bellan - INFN Torino

Generate a seed starting from a list of RecHits

Definition at line 19 of file MuonSeedFromRecHits.h.

Member Typedef Documentation

ConstMuonRecHitPointer

typedef MuonTransientTrackingRecHit::ConstMuonRecHitPointer MuonSeedFromRecHits::ConstMuonRecHitPointer

protected

Definition at line 39 of file MuonSeedFromRecHits.h.

MuonRecHitContainer

typedef MuonTransientTrackingRecHit::MuonRecHitContainer MuonSeedFromRecHits::MuonRecHitContainer

protected

Definition at line 37 of file MuonSeedFromRecHits.h.

MuonRecHitPointer

typedef MuonTransientTrackingRecHit::MuonRecHitPointer MuonSeedFromRecHits::MuonRecHitPointer

protected

Definition at line 38 of file MuonSeedFromRecHits.h.

Constructor & Destructor Documentation

MuonSeedFromRecHits()

MuonSeedFromRecHits::MuonSeedFromRecHits

(

)

Definition at line 36 of file MuonSeedFromRecHits.cc.

: theField(nullptr) {}

~MuonSeedFromRecHits()

virtual MuonSeedFromRecHits::~MuonSeedFromRecHits ( )

inlinevirtual

Definition at line 22 of file MuonSeedFromRecHits.h.

{}

Member Function Documentation

add()

void MuonSeedFromRecHits::add ( MuonTransientTrackingRecHit::MuonRecHitPointer  hit )

inline

Definition at line 27 of file MuonSeedFromRecHits.h.

References theRhits.

Referenced by counter.Counter::register(), and MuonSeedFinder::seeds().

{ theRhits.push_back(hit); }

clear()

void MuonSeedFromRecHits::clear ( void  )

inline

Definition at line 30 of file MuonSeedFromRecHits.h.

References theRhits.

Referenced by MuonSeedFinder::seeds().

{ theRhits.clear(); }

createSeed()

TrajectorySeed MuonSeedFromRecHits::createSeed	(	float	ptmean,
		float	sptmean,
		MuonTransientTrackingRecHit::ConstMuonRecHitPointer	last
	)		const

Definition at line 38 of file MuonSeedFromRecHits.cc.

References alongMomentum, ALCARECOTkAlJpsiMuMu_cff::charge, clone(), debug, relativeConstraints::error, MainPageGenerator::l, dqmdumpme::last, metname, PV3DBase< T, PVType, FrameType >::perp(), trajectoryStateTransform::persistentState(), edm::OwnVector< T, P >::push_back(), nano_mu_digi_cff::rawId, sqr(), AlCaHLTBitMon_QueryRunRegistry::string, submitPVValidationJobs::t, theField, theRhits, and PV3DBase< T, PVType, FrameType >::theta().

Referenced by MuonCSCSeedFromRecHits::createDefaultEndcapSeed(), MuonOverlapSeedFromRecHits::makeSeed(), MuonCSCSeedFromRecHits::makeSeed(), MuonDTSeedFromRecHits::seed(), and ExhaustiveMuonTrajectoryBuilder::trajectories().

                                                                                                             {
  const std::string metname = "Muon|RecoMuon|MuonSeedFromRecHits";

  MuonPatternRecoDumper debug;

  // FIXME: put it into a parameter set!
  double theMinMomentum = 3.0;
  int charge = std::copysign(1, ptmean);

  // Minimal pt
  if (fabs(ptmean) < theMinMomentum)
    ptmean = theMinMomentum * charge;

  AlgebraicVector t(4);
  AlgebraicSymMatrix mat(5, 0);

  // Fill the LocalTrajectoryParameters
  LocalPoint segPos = last->localPosition();
  GlobalVector mom = last->globalPosition() - GlobalPoint();
  GlobalVector polar(GlobalVector::Spherical(mom.theta(), last->globalDirection().phi(), 1.));
  polar *= fabs(ptmean) / polar.perp();
  LocalVector segDirFromPos = last->det()->toLocal(polar);

  LocalTrajectoryParameters param(segPos, segDirFromPos, charge);

  // this perform H.T() * parErr * H, which is the projection of the
  // the measurement error (rechit rf) to the state error (TSOS rf)
  // Legenda:
  // H => is the 4x5 projection matrix
  // parError the 4x4 parameter error matrix of the RecHit

  // LogTrace(metname) << "Projection matrix:\n" << last->projectionMatrix();
  // LogTrace(metname) << "Error matrix:\n" << last->parametersError();

  mat = last->parametersError().similarityT(last->projectionMatrix());

  float p_err = sqr(sptmean / (ptmean * ptmean));
  mat[0][0] = p_err;

  LocalTrajectoryError error(asSMatrix<5>(mat));

  // Create the TrajectoryStateOnSurface
  TrajectoryStateOnSurface tsos(param, error, last->det()->surface(), theField);

  // The following LogTraces must be moved somewhere else (StandAloneTrajectoryBuilder)
  // Here the TSOS does not have the magnetic field set, so dumpTSOS causes a crash
  // (when LogTrace/LogDebug is activated)
  //LogTrace(metname) << "Trajectory State on Surface before the extrapolation"<<endl;
  //LogTrace(metname) << debug.dumpTSOS(tsos);

  // Take the DetLayer on which relies the rechit
  DetId id = last->geographicalId();
  // Segment layer
  //LogTrace(metname) << "The RecSegment relies on: "<<endl;
  //LogTrace(metname) << debug.dumpMuonId(id);
  //LogTrace(metname) << debug.dumpTSOS(tsos);

  // Transform it in a TrajectoryStateOnSurface

  PTrajectoryStateOnDet const& seedTSOS = trajectoryStateTransform::persistentState(tsos, id.rawId());

  edm::OwnVector<TrackingRecHit> container;
  for (unsigned l = 0; l < theRhits.size(); l++) {
    container.push_back(theRhits[l]->hit()->clone());
  }

  TrajectorySeed theSeed(seedTSOS, container, alongMomentum);

  return theSeed;
}

firstRecHit()

MuonTransientTrackingRecHit::ConstMuonRecHitPointer MuonSeedFromRecHits::firstRecHit ( ) const

inline

Definition at line 28 of file MuonSeedFromRecHits.h.

References theRhits.

Referenced by MuonSeedFinder::seeds().

{ return theRhits.front(); }

nrhit()

unsigned int MuonSeedFromRecHits::nrhit ( ) const

inline

Definition at line 29 of file MuonSeedFromRecHits.h.

References theRhits.

{ return theRhits.size(); }

setBField()

void MuonSeedFromRecHits::setBField ( const MagneticField *  field )

inline

Definition at line 24 of file MuonSeedFromRecHits.h.

References theField.

Referenced by MuonSeedFinder::setBField().

{ theField = field; }

setPtExtractor()

void MuonSeedFromRecHits::setPtExtractor ( const MuonSeedPtExtractor *  extractor )

inline

Definition at line 25 of file MuonSeedFromRecHits.h.

References thePtExtractor.

Referenced by MuonSeedFinder::MuonSeedFinder().

{ thePtExtractor = extractor; }

Member Data Documentation

theField

const MagneticField* MuonSeedFromRecHits::theField

protected

Definition at line 42 of file MuonSeedFromRecHits.h.

Referenced by createSeed(), and setBField().

thePtExtractor

const MuonSeedPtExtractor* MuonSeedFromRecHits::thePtExtractor

protected

Definition at line 43 of file MuonSeedFromRecHits.h.

Referenced by MuonDTSeedFromRecHits::computePtWithoutVtx(), MuonDTSeedFromRecHits::computePtWithVtx(), MuonCSCSeedFromRecHits::createDefaultEndcapSeed(), MuonOverlapSeedFromRecHits::makeSeed(), MuonCSCSeedFromRecHits::makeSeed(), and setPtExtractor().

theRhits

MuonTransientTrackingRecHit::MuonRecHitContainer MuonSeedFromRecHits::theRhits

protected

Definition at line 41 of file MuonSeedFromRecHits.h.

Referenced by add(), MuonCSCSeedFromRecHits::analyze(), MuonDTSeedFromRecHits::bestEta(), clear(), MuonDTSeedFromRecHits::computePtWithoutVtx(), MuonDTSeedFromRecHits::computePtWithVtx(), createSeed(), firstRecHit(), MuonCSCSeedFromRecHits::makeDefaultSeed(), MuonCSCSeedFromRecHits::makeSeed(), nrhit(), MuonCSCSeedFromRecHits::seed(), MuonDTSeedFromRecHits::seed(), and MuonOverlapSeedFromRecHits::seeds().