TrajectoryStateClosestToPoint Class Reference

#include <TrajectoryStateClosestToPoint.h>

Public Member Functions
void	calculateFTS () const
TrackCharge	charge () const
bool	hasError () const
bool	isValid () const
GlobalVector	momentum () const
const PerigeeTrajectoryError &	perigeeError () const
const PerigeeTrajectoryParameters &	perigeeParameters () const
GlobalPoint	position () const
double	pt () const
const GlobalPoint &	referencePoint () const
const FreeTrajectoryState &	theState () const
	TrajectoryStateClosestToPoint ()
	parameter dimension More...
	TrajectoryStateClosestToPoint (const FTS &originalFTS, const GlobalPoint &referencePoint)
	TrajectoryStateClosestToPoint (const PerigeeTrajectoryParameters &perigeeParameters, double pt, const GlobalPoint &referencePoint, const MagneticField *field)
	TrajectoryStateClosestToPoint (const PerigeeTrajectoryParameters &perigeeParameters, double pt, const PerigeeTrajectoryError &perigeeError, const GlobalPoint &referencePoint, const MagneticField *field)

Private Types
typedef FreeTrajectoryState	FTS
typedef TrajectoryStateOnSurface	TSOS

Private Attributes
bool	errorIsAvailable
const MagneticField *	theField
FTS	theFTS
bool	theFTSavailable
PerigeeTrajectoryParameters	theParameters
PerigeeTrajectoryError	thePerigeeError
double	thePt
GlobalPoint	theRefPoint
bool	valid

Friends
class	TrajectoryStateClosestToPointBuilder

Detailed Description

Trajectory state defined at a given point on the helix, which is the point of closest approach to the reference point. In addition to the FreeTrajectoryState at that point, it also gives the perigee parameters. This state can also be invalid, e.g. in case the propagation was not successful.

Definition at line 18 of file TrajectoryStateClosestToPoint.h.

Member Typedef Documentation

FTS

typedef FreeTrajectoryState TrajectoryStateClosestToPoint::FTS

private

Definition at line 20 of file TrajectoryStateClosestToPoint.h.

TSOS

typedef TrajectoryStateOnSurface TrajectoryStateClosestToPoint::TSOS

private

Definition at line 19 of file TrajectoryStateClosestToPoint.h.

Constructor & Destructor Documentation

TrajectoryStateClosestToPoint() [1/4]

TrajectoryStateClosestToPoint::TrajectoryStateClosestToPoint ( )

inline

parameter dimension

Definition at line 24 of file TrajectoryStateClosestToPoint.h.

: valid(false), theFTSavailable(false), errorIsAvailable(false) {}

TrajectoryStateClosestToPoint() [2/4]

TrajectoryStateClosestToPoint::TrajectoryStateClosestToPoint ( const PerigeeTrajectoryParameters &  perigeeParameters, double  pt, const GlobalPoint &  referencePoint, const MagneticField *  field  )

inline

Public constructor, which is used to convert perigee parameters to a FreeTrajectoryState. For the case where no error is provided.

Definition at line 31 of file TrajectoryStateClosestToPoint.h.

      : theField(field),
        theRefPoint(referencePoint),
        theParameters(perigeeParameters),
        thePt(pt),
        valid(true),
        theFTSavailable(false),
        errorIsAvailable(false) {}

TrajectoryStateClosestToPoint() [3/4]

TrajectoryStateClosestToPoint::TrajectoryStateClosestToPoint ( const PerigeeTrajectoryParameters &  perigeeParameters, double  pt, const PerigeeTrajectoryError &  perigeeError, const GlobalPoint &  referencePoint, const MagneticField *  field  )

inline

Public constructor, which is used to convert perigee parameters to a FreeTrajectoryState. For the case where an error is provided.

Definition at line 48 of file TrajectoryStateClosestToPoint.h.

      : theField(field),
        theRefPoint(referencePoint),
        theParameters(perigeeParameters),
        thePt(pt),
        thePerigeeError(perigeeError),
        valid(true),
        theFTSavailable(false),
        errorIsAvailable(true) {}

TrajectoryStateClosestToPoint() [4/4]

TrajectoryStateClosestToPoint::TrajectoryStateClosestToPoint	(	const FTS &	originalFTS,
		const GlobalPoint &	referencePoint
	)

Use the appropriate TrajectoryStateClosestToPointBuilder to get access to this constructor

Definition at line 6 of file TrajectoryStateClosestToPoint.cc.

    : theFTS(originalFTS), theRefPoint(referencePoint), valid(true), theFTSavailable(true) {
  try {
    theParameters = PerigeeConversions::ftsToPerigeeParameters(originalFTS, referencePoint, thePt);
    if (theFTS.hasError()) {
      thePerigeeError = PerigeeConversions::ftsToPerigeeError(originalFTS);
      errorIsAvailable = true;
    } else {
      errorIsAvailable = false;
    }
    theField = &(originalFTS.parameters().magneticField());
  } catch (const cms::Exception& ex) {
    if (ex.category() != "PerigeeConversions")
      throw;
    edm::LogInfo("TrajectoryStateClosestToPoint_PerigeeConversions")
        << "Caught exception " << ex.explainSelf() << ".\n";
    valid = false;
  }
}

References cms::Exception::category(), errorIsAvailable, cms::Exception::explainSelf(), PerigeeConversions::ftsToPerigeeError(), PerigeeConversions::ftsToPerigeeParameters(), FreeTrajectoryState::hasError(), GlobalTrajectoryParameters::magneticField(), FreeTrajectoryState::parameters(), referencePoint(), theField, theFTS, theParameters, thePerigeeError, thePt, and valid.

Member Function Documentation

calculateFTS()

void TrajectoryStateClosestToPoint::calculateFTS

(

)

const

Definition at line 26 of file TrajectoryStateClosestToPoint.cc.

                                                       {
  if (!isValid())
    throw TrajectoryStateException("TrajectoryStateClosestToPoint is invalid and cannot return any parameters");
  GlobalTrajectoryParameters gtp(PerigeeConversions::positionFromPerigee(theParameters, theRefPoint),
                                 PerigeeConversions::momentumFromPerigee(theParameters, thePt, theRefPoint),
                                 theParameters.charge(),
                                 theField);
  if (errorIsAvailable) {
    theFTS = FTS(gtp, PerigeeConversions::curvilinearError(thePerigeeError, gtp));
  } else {
    theFTS = FTS(gtp);
  }
  theFTSavailable = true;
}

References PerigeeTrajectoryParameters::charge(), PerigeeConversions::curvilinearError(), errorIsAvailable, isValid(), PerigeeConversions::momentumFromPerigee(), PerigeeConversions::positionFromPerigee(), theField, theFTS, theFTSavailable, theParameters, thePerigeeError, thePt, and theRefPoint.

Referenced by theState().

charge()

TrackCharge TrajectoryStateClosestToPoint::charge ( void  ) const

inline

Definition at line 94 of file TrajectoryStateClosestToPoint.h.

{ return theParameters.charge(); }

References PerigeeTrajectoryParameters::charge(), and theParameters.

Referenced by TestOutliers::analyze().

hasError()

bool TrajectoryStateClosestToPoint::hasError ( void  ) const

inline

tells whether the error of the perigee parameters is available.

Definition at line 106 of file TrajectoryStateClosestToPoint.h.

{ return errorIsAvailable; }

References errorIsAvailable.

isValid()

bool TrajectoryStateClosestToPoint::isValid ( void  ) const

inline

Tells whether the state is valid or not

Definition at line 111 of file TrajectoryStateClosestToPoint.h.

{ return valid; }

References valid.

Referenced by ntupleDataFormat._Object::_checkIsValid(), BPHMonitor::analyze(), L1MuonRecoTreeProducer::analyze(), HLTMuonDimuonL3Filter::applyDiMuonSelection(), calculateFTS(), PerigeeLinearizedTrackState::computeJacobians(), V0Fitter::fitAll(), HLTDiMuonGlbTrkFilter::hltFilter(), HLTMuonTrackMassFilter::hltFilter(), HLTMuonTrimuonL3Filter::hltFilter(), PerigeeLinearizedTrackState::predictedStateWeight(), Onia2MuMuPAT::produce(), MuonUpdatorAtVertex::propagateToNominalLine(), and core.AutoHandle.AutoHandle::ReallyLoad().

momentum()

GlobalVector TrajectoryStateClosestToPoint::momentum ( ) const

inline

Definition at line 92 of file TrajectoryStateClosestToPoint.h.

{ return PerigeeConversions::momentumFromPerigee(theParameters, thePt, theRefPoint); }

References PerigeeConversions::momentumFromPerigee(), theParameters, thePt, and theRefPoint.

Referenced by V0Fitter::fitAll(), TwoBodyDecayLinearizationPointFinder::getLinearizationPoint(), and MatcherUsingTracksAlgorithm::matchWithPropagation().

perigeeError()

const PerigeeTrajectoryError& TrajectoryStateClosestToPoint::perigeeError ( ) const

inline

returns the error of the perigee parameters if it is available

Definition at line 84 of file TrajectoryStateClosestToPoint.h.

{ return thePerigeeError; }

References thePerigeeError.

Referenced by PrimaryVertexValidation::analyze(), PerigeeRefittedTrackState::covariance(), tauImpactParameter::ParticleBuilder::createTrackParticle(), VertexFitterResult::fill(), PerigeeLinearizedTrackState::predictedStateError(), PerigeeLinearizedTrackState::predictedStateMomentumError(), and PerigeeLinearizedTrackState::predictedStateWeight().

perigeeParameters()

const PerigeeTrajectoryParameters& TrajectoryStateClosestToPoint::perigeeParameters ( ) const

inline

returns the perigee parameters at the p.c.a. to the reference point.

Definition at line 73 of file TrajectoryStateClosestToPoint.h.

{ return theParameters; }

References theParameters.

Referenced by PrimaryVertexValidation::analyze(), PerigeeLinearizedTrackState::computeChargedJacobians(), tauImpactParameter::ParticleBuilder::createTrackParticle(), PerigeeRefittedTrackState::parameters(), PerigeeLinearizedTrackState::predictedStateMomentumParameters(), and PerigeeLinearizedTrackState::predictedStateParameters().

position()

GlobalPoint TrajectoryStateClosestToPoint::position ( ) const

inline

returns the state defined at the point of closest approach to the reference point.

Definition at line 90 of file TrajectoryStateClosestToPoint.h.

{ return PerigeeConversions::positionFromPerigee(theParameters, theRefPoint); }

References PerigeeConversions::positionFromPerigee(), theParameters, and theRefPoint.

Referenced by PrimaryVertexValidation::analyze(), L1MuonRecoTreeProducer::analyze(), tauImpactParameter::ParticleBuilder::createTrackParticle(), and MatcherUsingTracksAlgorithm::matchWithPropagation().

pt()

double TrajectoryStateClosestToPoint::pt ( ) const

inline

returns the transverse momentum magnitude

Definition at line 78 of file TrajectoryStateClosestToPoint.h.

{ return thePt; }

References thePt.

Referenced by Particle.Particle::__str__(), DiObject.DiMuon::__str__(), Photon.Photon::calScaledIsoValueExp(), Photon.Photon::calScaledIsoValueLin(), Photon.Photon::calScaledIsoValueQuadr(), PerigeeLinearizedTrackState::computeChargedJacobians(), Electron.Electron::mvaIDLoose(), Electron.Electron::mvaIDRun2(), Electron.Electron::mvaIDTight(), Electron.Electron::ptErr(), ntupleDataFormat.Track::ptPull(), Lepton.Lepton::relIso(), Lepton.Lepton::relIsoFromEA(), Lepton.Lepton::relIsoR(), and Jet.Jet::setCorrP4().

referencePoint()

const GlobalPoint& TrajectoryStateClosestToPoint::referencePoint ( ) const

inline

returns the reference point which used to construct the state. It is thus the point with respect to which the impact parameters are defined.

Definition at line 67 of file TrajectoryStateClosestToPoint.h.

{ return theRefPoint; }

References theRefPoint.

Referenced by PerigeeRefittedTrackState::position(), and TrajectoryStateClosestToPoint().

theState()

const FreeTrajectoryState& TrajectoryStateClosestToPoint::theState ( ) const

inline

Definition at line 96 of file TrajectoryStateClosestToPoint.h.

                                              {
    if (!theFTSavailable)
      calculateFTS();
    return theFTS;
  }

References calculateFTS(), theFTS, and theFTSavailable.

Referenced by ValidationMisalignedTracker::analyze(), BPHMonitor::analyze(), TestOutliers::analyze(), PrimaryVertexValidation::analyze(), HLTMuonDimuonL3Filter::applyDiMuonSelection(), pat::LeptonVertexSignificance::calculate(), BPHPlusMinusVertex::computeApp(), PerigeeLinearizedTrackState::computeChargedJacobians(), PerigeeLinearizedTrackState::computeJacobians(), PerigeeLinearizedTrackState::computeNeutralJacobians(), PerigeeRefittedTrackState::freeTrajectoryState(), HLTDiMuonGlbTrkFilter::hltFilter(), HLTMuonTrackMassFilter::hltFilter(), HLTMuonTrimuonL3Filter::hltFilter(), KinematicParticleFactoryFromTransientTrack::particle(), Onia2MuMuPAT::produce(), MuonUpdatorAtVertex::propagateToNominalLine(), TrackClassifier::reconstructionInformation(), and PerigeeRefittedTrackState::trajectoryStateOnSurface().

Friends And Related Function Documentation

TrajectoryStateClosestToPointBuilder

friend class TrajectoryStateClosestToPointBuilder

friend

Definition at line 113 of file TrajectoryStateClosestToPoint.h.

Member Data Documentation

errorIsAvailable

bool TrajectoryStateClosestToPoint::errorIsAvailable

private

Definition at line 135 of file TrajectoryStateClosestToPoint.h.

Referenced by calculateFTS(), hasError(), and TrajectoryStateClosestToPoint().

theField

const MagneticField* TrajectoryStateClosestToPoint::theField

private

Definition at line 125 of file TrajectoryStateClosestToPoint.h.

Referenced by calculateFTS(), and TrajectoryStateClosestToPoint().

theFTS

FTS TrajectoryStateClosestToPoint::theFTS

mutableprivate

Definition at line 127 of file TrajectoryStateClosestToPoint.h.

Referenced by calculateFTS(), theState(), and TrajectoryStateClosestToPoint().

theFTSavailable

bool TrajectoryStateClosestToPoint::theFTSavailable

mutableprivate

Definition at line 134 of file TrajectoryStateClosestToPoint.h.

Referenced by calculateFTS(), and theState().

theParameters

PerigeeTrajectoryParameters TrajectoryStateClosestToPoint::theParameters

private

Definition at line 130 of file TrajectoryStateClosestToPoint.h.

Referenced by calculateFTS(), charge(), momentum(), perigeeParameters(), position(), and TrajectoryStateClosestToPoint().

thePerigeeError

PerigeeTrajectoryError TrajectoryStateClosestToPoint::thePerigeeError

private

Definition at line 132 of file TrajectoryStateClosestToPoint.h.

Referenced by calculateFTS(), perigeeError(), and TrajectoryStateClosestToPoint().

thePt

double TrajectoryStateClosestToPoint::thePt

private

Definition at line 131 of file TrajectoryStateClosestToPoint.h.

Referenced by calculateFTS(), momentum(), pt(), and TrajectoryStateClosestToPoint().

theRefPoint

GlobalPoint TrajectoryStateClosestToPoint::theRefPoint

private

Definition at line 129 of file TrajectoryStateClosestToPoint.h.

Referenced by calculateFTS(), momentum(), position(), and referencePoint().

valid

bool TrajectoryStateClosestToPoint::valid

private

Definition at line 133 of file TrajectoryStateClosestToPoint.h.

Referenced by isValid(), and TrajectoryStateClosestToPoint().