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PerigeeKinematicState Class Reference

Class caching the "extended" perigee parametrization for vertex fitting inside the KinematicFit library. More...

#include <RecoVertex/KinematicFitPrimitives/interface/PerigeeKinematicState.h>

List of all members.

Public Member Functions
bool	hasError () const
	Access methods.
bool	isValid () const
const ExtendedPerigeeTrajectoryError &	perigeeError () const
	Returns the error matrix of extended perigee parametrization.
	PerigeeKinematicState ()
const ExtendedPerigeeTrajectoryParameters &	perigeeParameters () const
	Returns the extended perigee parameters.
const GlobalPoint	referencePoint () const
	Returns the reference point.
const KinematicState	theState () const
virtual	~PerigeeKinematicState ()
Private Member Functions
AlgebraicMatrix	jacobianCurvilinear2Perigee (const FreeTrajectoryState &fts) const
	PerigeeKinematicState (const KinematicState &state, const GlobalPoint &pt)
Private Attributes
ExtendedPerigeeTrajectoryError	cov
bool	errorIsAvailable
KinematicState	inState
ExtendedPerigeeTrajectoryParameters	par
GlobalPoint	point
bool	vl
Friends
class	TransientTrackKinematicStateBuilder

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Detailed Description

Class caching the "extended" perigee parametrization for vertex fitting inside the KinematicFit library.

Extended parameters are: (epsilon, rho, phi, theta_p, z_p, m) (see TrajectoryStateClosestToPoint class for reference)

Kirill Prokofiev, august 2003

Definition at line 21 of file PerigeeKinematicState.h.

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Constructor & Destructor Documentation

PerigeeKinematicState::PerigeeKinematicState

(

)

[inline]

Definition at line 25 of file PerigeeKinematicState.h.

References errorIsAvailable, and vl.

 {
  vl = false;
  errorIsAvailable = false;
 }

virtual PerigeeKinematicState::~PerigeeKinematicState

(

)

[inline, virtual]

Definition at line 31 of file PerigeeKinematicState.h.

{}

PerigeeKinematicState::PerigeeKinematicState	(	const KinematicState &	state,
		const GlobalPoint &	pt
	)			[private]

Definition at line 6 of file PerigeeKinematicState.cc.

References conversions_cfi::conversions, cov, err, KinematicPerigeeConversions::extendedPerigeeFromKinematicParameters(), KinematicState::freeTrajectoryState(), KinematicState::isValid(), PerigeeConversions::jacobianCurvilinear2Perigee(), KinematicState::kinematicParametersError(), KinematicParametersError::matrix(), par, and FreeTrajectoryState::parameters().

                                                                                              :
 point(pt), inState(state),  errorIsAvailable(true),vl(true)
{
 if(!(state.isValid())) throw VertexException("PerigeeKinematicState::kinematic state passed is not valid!");

//working with parameters:
 KinematicPerigeeConversions conversions;
 par  = conversions.extendedPerigeeFromKinematicParameters(state,pt);
   
//creating the error
 AlgebraicSymMatrix77 err = state.kinematicParametersError().matrix();

//making jacobian for curvilinear frame
 JacobianCartesianToCurvilinear jj(state.freeTrajectoryState().parameters());  
 AlgebraicMatrix67 ki2cu;
 ki2cu.Place_at(jj.jacobian(),0,0);
 ki2cu(5,6) = 1.;
 AlgebraicMatrix66 cu2pe;
 PerigeeConversions pc;
 cu2pe.Place_at(pc.jacobianCurvilinear2Perigee(state.freeTrajectoryState()),0,0);
 cu2pe(5,5) = 1.;
 AlgebraicMatrix67 jacobian = cu2pe*ki2cu;

 cov = ExtendedPerigeeTrajectoryError(ROOT::Math::Similarity(jacobian, err));

}

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Member Function Documentation

bool PerigeeKinematicState::hasError

(

void

)

const [inline]

Access methods.

Definition at line 35 of file PerigeeKinematicState.h.

References errorIsAvailable, and isValid().

Referenced by perigeeError().

 {
  if(!(isValid()))throw VertexException("PerigeeKinematicState::error is requested for the invalid state");
  return errorIsAvailable;
 }

bool PerigeeKinematicState::isValid

(

void

)

const [inline]

Definition at line 41 of file PerigeeKinematicState.h.

References vl.

Referenced by hasError(), ParticleKinematicLinearizedTrackState::hasError(), perigeeError(), perigeeParameters(), referencePoint(), and theState().

 {return vl;}

AlgebraicMatrix PerigeeKinematicState::jacobianCurvilinear2Perigee

(

const FreeTrajectoryState &

fts

)

const [private]

const ExtendedPerigeeTrajectoryError& PerigeeKinematicState::perigeeError

(

)

const [inline]

Returns the error matrix of extended perigee parametrization.

Definition at line 63 of file PerigeeKinematicState.h.

References cov, hasError(), and isValid().

Referenced by ParticleKinematicLinearizedTrackState::predictedStateError(), ParticleKinematicLinearizedTrackState::predictedStateMomentumError(), and ParticleKinematicLinearizedTrackState::predictedStateWeight().

 {
  if(!(isValid()))  throw VertexException("PerigeeKinematicState::requesting perigee error for invalid state");
  if(!(hasError())) throw VertexException("PerigeeKinematicState::requesting perigee error when none available");
  return cov;
 }

const ExtendedPerigeeTrajectoryParameters& PerigeeKinematicState::perigeeParameters

(

)

const [inline]

Returns the extended perigee parameters.

Definition at line 73 of file PerigeeKinematicState.h.

References isValid(), and par.

Referenced by ParticleKinematicLinearizedTrackState::predictedStateMomentumParameters(), and ParticleKinematicLinearizedTrackState::predictedStateParameters().

 {
  if(!(isValid()))  throw VertexException("PerigeeKinematicState::requesting perigee parameters for invalid state");
  return par;
 }

const GlobalPoint PerigeeKinematicState::referencePoint

(

)

const [inline]

Returns the reference point.

Definition at line 53 of file PerigeeKinematicState.h.

References isValid(), and point.

 {
  if(!isValid()) throw VertexException("PerigeeKinematicState::point is requested for the invalid state");
  return point;
 }

const KinematicState PerigeeKinematicState::theState

(

)

const [inline]

Definition at line 44 of file PerigeeKinematicState.h.

References inState, and isValid().

Referenced by ParticleKinematicLinearizedTrackState::computeChargedJacobians(), and ParticleKinematicLinearizedTrackState::computeNeutralJacobians().

 {
  if(!isValid()) throw VertexException("PerigeeKinematicState::initial state is requested for the invalid state");
  return inState;
 }

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Friends And Related Function Documentation

friend class TransientTrackKinematicStateBuilder [friend]

Definition at line 81 of file PerigeeKinematicState.h.

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Member Data Documentation

ExtendedPerigeeTrajectoryError PerigeeKinematicState::cov [private]

Definition at line 96 of file PerigeeKinematicState.h.

Referenced by perigeeError(), and PerigeeKinematicState().

bool PerigeeKinematicState::errorIsAvailable [private]

Definition at line 98 of file PerigeeKinematicState.h.

Referenced by hasError(), and PerigeeKinematicState().

KinematicState PerigeeKinematicState::inState [private]

Definition at line 97 of file PerigeeKinematicState.h.

Referenced by theState().

ExtendedPerigeeTrajectoryParameters PerigeeKinematicState::par [private]

Definition at line 95 of file PerigeeKinematicState.h.

Referenced by PerigeeKinematicState(), and perigeeParameters().

GlobalPoint PerigeeKinematicState::point [private]

Definition at line 94 of file PerigeeKinematicState.h.

Referenced by referencePoint().

bool PerigeeKinematicState::vl [private]

Definition at line 99 of file PerigeeKinematicState.h.

Referenced by isValid(), and PerigeeKinematicState().

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The documentation for this class was generated from the following files:

• RecoVertex/KinematicFitPrimitives/interface/PerigeeKinematicState.h
• RecoVertex/KinematicFitPrimitives/src/PerigeeKinematicState.cc

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