#include <PerigeeTrajectoryParameters.h>

Public Member Functions
TrackCharge	charge () const
double	longitudinalImpactParameter () const
	PerigeeTrajectoryParameters (double aCurv, double aTheta, double aPhi, double aTip, double aLip, bool charged=true)
	PerigeeTrajectoryParameters ()
	PerigeeTrajectoryParameters (const AlgebraicVector &aVector, bool charged=true)
	PerigeeTrajectoryParameters (const AlgebraicVector5 &aVector, 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`
	)		`[inline, explicit]`

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`
	)		`[inline, explicit]`

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.

{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().