PerigeeTrajectoryParameters Class Reference

#include <PerigeeTrajectoryParameters.h>

Public Member Functions
TrackCharge	charge () const
double	longitudinalImpactParameter () const
	PerigeeTrajectoryParameters ()
	PerigeeTrajectoryParameters (const AlgebraicVector &aVector, bool charged=true)
	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
const AlgebraicVector	vector_old () const

Private Attributes
TrackCharge	theCharge
double	theCurv
double	theLip
double	thePhi
double	theTheta
double	theTip
AlgebraicVector5	theVector
bool	vectorIsAvailable

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 AlgebraicVector &  aVector, bool  charged = true  )

inlineexplicit

Definition at line 23 of file PerigeeTrajectoryParameters.h.

References theCharge, and theCurv.

                                                                                           :
       theCurv(aVector[0]), theTheta(aVector[1]), thePhi(aVector[2]),
       theTip(aVector[3]), theLip(aVector[4]), theVector(asSVector<5>(aVector)), 
       vectorIsAvailable(true)
  {
    if ( charged )
      theCharge = theCurv>0 ? -1 : 1;
    else
      theCharge = 0;
  }

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

inlineexplicit

Definition at line 34 of file PerigeeTrajectoryParameters.h.

References theCharge, and theCurv.

                                                                                            :
       theCurv(aVector[0]), theTheta(aVector[1]), thePhi(aVector[2]),
       theTip(aVector[3]), theLip(aVector[4]), theVector(aVector), 
       vectorIsAvailable(true)
  {
    if ( charged )
      theCharge = theCurv>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 45 of file PerigeeTrajectoryParameters.h.

References theCharge, and theCurv.

                                                                :
    theCurv(aCurv), theTheta(aTheta), thePhi(aPhi), theTip(aTip), theLip(aLip),
    vectorIsAvailable(false)
  {
    if ( charged )
      theCharge = theCurv>0 ? -1 : 1;
    else
      theCharge = 0;
  }

Member Function Documentation

TrackCharge PerigeeTrajectoryParameters::charge ( void  ) const

inline

The charge

Definition at line 60 of file PerigeeTrajectoryParameters.h.

References theCharge.

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

{return theCharge;}

double PerigeeTrajectoryParameters::longitudinalImpactParameter ( ) const

inline

The longitudinal impact parameter

Definition at line 90 of file PerigeeTrajectoryParameters.h.

References theLip.

{return theLip;}

double PerigeeTrajectoryParameters::phi ( void  ) const

inline

The phi angle

Definition at line 78 of file PerigeeTrajectoryParameters.h.

References thePhi.

Referenced by PerigeeConversions::momentumFromPerigee(), and PerigeeLinearizedTrackState::predictedStateMomentumParameters().

{return thePhi;}

double PerigeeTrajectoryParameters::theta ( ) const

inline

The theta angle

Definition at line 72 of file PerigeeTrajectoryParameters.h.

References theTheta.

Referenced by PerigeeConversions::momentumFromPerigee(), and PerigeeLinearizedTrackState::predictedStateMomentumParameters().

{return theTheta;}

double PerigeeTrajectoryParameters::transverseCurvature ( ) const

inline

The signed transverse curvature

Definition at line 66 of file PerigeeTrajectoryParameters.h.

References charge(), and theCurv.

{return ((charge()!=0)?theCurv:0.);}

double PerigeeTrajectoryParameters::transverseImpactParameter ( ) const

inline

The (signed) transverse impact parameter

Definition at line 84 of file PerigeeTrajectoryParameters.h.

References theTip.

Referenced by AddTvTrack::getSecondaryVertices().

{return theTip;}

const AlgebraicVector5& PerigeeTrajectoryParameters::vector ( ) const

inline

Definition at line 100 of file PerigeeTrajectoryParameters.h.

References theCurv, theLip, thePhi, theTheta, theTip, theVector, and vectorIsAvailable.

Referenced by PerigeeRefittedTrackState::parameters(), PerigeeConversions::positionFromPerigee(), PerigeeLinearizedTrackState::predictedStateMomentumParameters(), and PerigeeLinearizedTrackState::predictedStateParameters().

  {
    if (!vectorIsAvailable) {
      //theVector = AlgebraicVector5();
      theVector[0] = theCurv;
      theVector[1] = theTheta;
      theVector[2] = thePhi;
      theVector[3] = theTip;
      theVector[4] = theLip;
      vectorIsAvailable = true;
    }
    return theVector;
  }

const AlgebraicVector PerigeeTrajectoryParameters::vector_old ( ) 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 98 of file PerigeeTrajectoryParameters.h.

References asHepVector(), and theVector.

Referenced by VertexFitterResult::fillParameters().

{ return asHepVector(theVector); }

Member Data Documentation

TrackCharge PerigeeTrajectoryParameters::theCharge

private

Definition at line 117 of file PerigeeTrajectoryParameters.h.

Referenced by charge(), and PerigeeTrajectoryParameters().

double PerigeeTrajectoryParameters::theCurv

private

Definition at line 116 of file PerigeeTrajectoryParameters.h.

Referenced by PerigeeTrajectoryParameters(), transverseCurvature(), and vector().

double PerigeeTrajectoryParameters::theLip

private

Definition at line 116 of file PerigeeTrajectoryParameters.h.

Referenced by longitudinalImpactParameter(), and vector().

double PerigeeTrajectoryParameters::thePhi

private

Definition at line 116 of file PerigeeTrajectoryParameters.h.

Referenced by phi(), and vector().

double PerigeeTrajectoryParameters::theTheta

private

Definition at line 116 of file PerigeeTrajectoryParameters.h.

Referenced by theta(), and vector().

double PerigeeTrajectoryParameters::theTip

private

Definition at line 116 of file PerigeeTrajectoryParameters.h.

Referenced by transverseImpactParameter(), and vector().

AlgebraicVector5 PerigeeTrajectoryParameters::theVector

mutableprivate

Definition at line 118 of file PerigeeTrajectoryParameters.h.

Referenced by vector(), and vector_old().

bool PerigeeTrajectoryParameters::vectorIsAvailable

mutableprivate

Definition at line 119 of file PerigeeTrajectoryParameters.h.

Referenced by vector().