PerigeeTrajectoryParameters Class Reference

#include <PerigeeTrajectoryParameters.h>

Public Member Functions
TrackCharge	charge () const
double	longitudinalImpactParameter () const
	PerigeeTrajectoryParameters ()
	PerigeeTrajectoryParameters (const AlgebraicVector5 &aVector, bool charged=true)
	PerigeeTrajectoryParameters (double aCurv, double aTheta, double aPhi, double aTip, double aLip, bool charged=true)
double	phi () const
double	theta () const
double	transverseCurvature () const
double	transverseImpactParameter () const
const AlgebraicVector5 &	vector () const

Private Attributes
TrackCharge	theCharge
AlgebraicVector5	theVector

Detailed Description

Class providing access to the Perigee parameters of a trajectory. These parameters consist of
rho : charged particles: transverse curvature (signed)
neutral particles: inverse magnitude of transverse momentum
theta, phi, transverse impact parameter (signed), longitudinal i.p.

Definition at line 16 of file PerigeeTrajectoryParameters.h.

Constructor & Destructor Documentation

PerigeeTrajectoryParameters::PerigeeTrajectoryParameters ( )

inline

Definition at line 21 of file PerigeeTrajectoryParameters.h.

{}

PerigeeTrajectoryParameters::PerigeeTrajectoryParameters ( const AlgebraicVector5 &  aVector, bool  charged = true  )

inlineexplicit

Definition at line 25 of file PerigeeTrajectoryParameters.h.

References theCharge, and theVector.

                                                                                            :
        theVector(aVector) {
    if ( charged )
      theCharge = theVector[0]>0 ? -1 : 1;
    else
      theCharge = 0;
  }

PerigeeTrajectoryParameters::PerigeeTrajectoryParameters ( double  aCurv, double  aTheta, double  aPhi, double  aTip, double  aLip, bool  charged = true  )

inline

Definition at line 33 of file PerigeeTrajectoryParameters.h.

References theCharge, and theVector.

                                                                 {
    theVector[0] = aCurv;
    theVector[1] = aTheta;
    theVector[2] = aPhi;
    theVector[3] = aTip;
    theVector[4] = aLip;

    if ( charged )
      theCharge = aCurv>0 ? -1 : 1;
    else
      theCharge = 0;
  }

Member Function Documentation

TrackCharge PerigeeTrajectoryParameters::charge ( void  ) const

inline

The charge

Definition at line 51 of file PerigeeTrajectoryParameters.h.

References theCharge.

Referenced by TrajectoryStateClosestToPoint::calculateFTS(), TrajectoryStateClosestToPoint::charge(), and transverseCurvature().

{return theCharge;}

double PerigeeTrajectoryParameters::longitudinalImpactParameter ( ) const

inline

The longitudinal impact parameter

Definition at line 81 of file PerigeeTrajectoryParameters.h.

References theVector.

{return theVector[4];}

double PerigeeTrajectoryParameters::phi ( void  ) const

inline

The phi angle

Definition at line 69 of file PerigeeTrajectoryParameters.h.

References theVector.

Referenced by Particle.Particle::__str__(), PerigeeLinearizedTrackState::computeChargedJacobians(), and PerigeeConversions::momentumFromPerigee().

{return theVector[2];}

double PerigeeTrajectoryParameters::theta ( void  ) const

inline

The theta angle

Definition at line 63 of file PerigeeTrajectoryParameters.h.

References theVector.

Referenced by PerigeeLinearizedTrackState::computeChargedJacobians(), PerigeeConversions::momentumFromPerigee(), and Tau.Tau::zImpact().

{return theVector[1];}

double PerigeeTrajectoryParameters::transverseCurvature ( ) const

inline

The signed transverse curvature

Definition at line 57 of file PerigeeTrajectoryParameters.h.

References charge(), and theVector.

{return ((charge()!=0)?theVector[0]:0.);}

double PerigeeTrajectoryParameters::transverseImpactParameter ( ) const

inline

The (signed) transverse impact parameter

Definition at line 75 of file PerigeeTrajectoryParameters.h.

References theVector.

Referenced by HLTMuon::analyze().

{return theVector[3];}

const AlgebraicVector5& PerigeeTrajectoryParameters::vector ( ) const

inline

returns the perigee parameters as a vector. The order of the parameters are:
transverse curvature (signed), theta, phi, transverse impact parameter (signed), longitudinal i.p.

Definition at line 89 of file PerigeeTrajectoryParameters.h.

References theVector.

Referenced by tauImpactParameter::ParticleBuilder::createTrackParticle(), VertexFitterResult::fillParameters(), MatcherUsingTracksAlgorithm::getChi2(), PerigeeRefittedTrackState::parameters(), PerigeeConversions::positionFromPerigee(), PerigeeLinearizedTrackState::predictedStateMomentumParameters(), and PerigeeLinearizedTrackState::predictedStateParameters().

{ return theVector;}

Member Data Documentation

TrackCharge PerigeeTrajectoryParameters::theCharge

private

Definition at line 94 of file PerigeeTrajectoryParameters.h.

Referenced by charge(), and PerigeeTrajectoryParameters().

AlgebraicVector5 PerigeeTrajectoryParameters::theVector

private

Definition at line 93 of file PerigeeTrajectoryParameters.h.

Referenced by longitudinalImpactParameter(), PerigeeTrajectoryParameters(), phi(), theta(), transverseCurvature(), transverseImpactParameter(), and vector().