PerigeeTrajectoryError Class Reference

#include <PerigeeTrajectoryError.h>

Public Member Functions
void	calculateWeightMatrix () const
const AlgebraicSymMatrix55 &	covarianceMatrix () const
double	longitudinalImpactParameterError () const
	PerigeeTrajectoryError ()
	PerigeeTrajectoryError (const AlgebraicSymMatrix55 &aPerigeeError)
double	phiError () const
double	thetaError () const
double	transverseCurvatureError () const
double	transverseImpactParameterError () const
const AlgebraicSymMatrix55 &	weightMatrix (int &error) const

Private Attributes
int	inverseError
AlgebraicSymMatrix55	thePerigeeError
AlgebraicSymMatrix55	thePerigeeWeight
bool	weightIsAvailable

Detailed Description

Class providing access to the Perigee parameters of a trajectory. These parameters consist of
transverse curvature (signed), theta, phi, transverse impact parameter (signed), longitudinal i.p.

Definition at line 14 of file PerigeeTrajectoryError.h.

Constructor & Destructor Documentation

PerigeeTrajectoryError::PerigeeTrajectoryError ( )

inline

Definition at line 19 of file PerigeeTrajectoryError.h.

{}

PerigeeTrajectoryError::PerigeeTrajectoryError ( const AlgebraicSymMatrix55 &  aPerigeeError )

inline

Definition at line 26 of file PerigeeTrajectoryError.h.

                                                                   :
    thePerigeeError(aPerigeeError), weightIsAvailable(false) {
         
  }

Member Function Documentation

void PerigeeTrajectoryError::calculateWeightMatrix

(

)

const

Definition at line 5 of file PerigeeTrajectoryError.cc.

References inverseError, invertPosDefMatrix(), thePerigeeError, thePerigeeWeight, and weightIsAvailable.

Referenced by weightMatrix().

                                                         {
  inverseError = invertPosDefMatrix(thePerigeeError, thePerigeeWeight) ?
    0 : 1;
  weightIsAvailable = true;
}

const AlgebraicSymMatrix55& PerigeeTrajectoryError::covarianceMatrix ( ) const

inline

The covariance matrix

Definition at line 35 of file PerigeeTrajectoryError.h.

References thePerigeeError.

Referenced by PerigeeRefittedTrackState::covariance(), PerigeeConversions::curvilinearError(), MatcherUsingTracksAlgorithm::getChi2(), and AddTvTrack::getSecondaryVertices().

{return thePerigeeError;}

double PerigeeTrajectoryError::longitudinalImpactParameterError ( ) const

inline

The longitudinal impact parameter

Definition at line 75 of file PerigeeTrajectoryError.h.

References mathSSE::sqrt(), and thePerigeeError.

Referenced by VertexFitterResult::fillErrors().

{return sqrt(thePerigeeError(4,4));}

double PerigeeTrajectoryError::phiError ( ) const

inline

The phi angle

Definition at line 63 of file PerigeeTrajectoryError.h.

References mathSSE::sqrt(), and thePerigeeError.

Referenced by VertexFitterResult::fillErrors(), and MuonTrackingRegionBuilder::region().

{return sqrt(thePerigeeError(2,2));}

double PerigeeTrajectoryError::thetaError ( ) const

inline

The theta angle

Definition at line 57 of file PerigeeTrajectoryError.h.

References mathSSE::sqrt(), and thePerigeeError.

Referenced by VertexFitterResult::fillErrors(), and MuonTrackingRegionBuilder::region().

{return sqrt(thePerigeeError(1,1));}

double PerigeeTrajectoryError::transverseCurvatureError ( ) const

inline

Definition at line 51 of file PerigeeTrajectoryError.h.

References mathSSE::sqrt(), and thePerigeeError.

Referenced by VertexFitterResult::fillErrors().

{return sqrt(thePerigeeError(0,0));}

double PerigeeTrajectoryError::transverseImpactParameterError ( ) const

inline

The (signed) transverse impact parameter

Definition at line 69 of file PerigeeTrajectoryError.h.

References mathSSE::sqrt(), and thePerigeeError.

Referenced by HLTMuon::analyze(), and VertexFitterResult::fillErrors().

{return sqrt(thePerigeeError(3,3));}

const AlgebraicSymMatrix55& PerigeeTrajectoryError::weightMatrix ( int &  error ) const

inline

The weight matrix (inverse of the covariance matrix) The error variable is 0 in case of success.

Definition at line 42 of file PerigeeTrajectoryError.h.

References calculateWeightMatrix(), inverseError, thePerigeeWeight, unlikely, and weightIsAvailable.

  {
    if unlikely(!weightIsAvailable) calculateWeightMatrix();
    error = inverseError;
    return thePerigeeWeight;
  }

Member Data Documentation

int PerigeeTrajectoryError::inverseError

mutableprivate

Definition at line 81 of file PerigeeTrajectoryError.h.

Referenced by calculateWeightMatrix(), and weightMatrix().

AlgebraicSymMatrix55 PerigeeTrajectoryError::thePerigeeError

private

Definition at line 79 of file PerigeeTrajectoryError.h.

Referenced by calculateWeightMatrix(), covarianceMatrix(), longitudinalImpactParameterError(), phiError(), thetaError(), transverseCurvatureError(), and transverseImpactParameterError().

AlgebraicSymMatrix55 PerigeeTrajectoryError::thePerigeeWeight

mutableprivate

Definition at line 80 of file PerigeeTrajectoryError.h.

Referenced by calculateWeightMatrix(), and weightMatrix().

bool PerigeeTrajectoryError::weightIsAvailable

mutableprivate

Definition at line 82 of file PerigeeTrajectoryError.h.

Referenced by calculateWeightMatrix(), and weightMatrix().