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PerigeeMultiLTS Class Reference

Multi-state version of PerigeeLinearizedTrackState. More...

#include <RecoVertex/GaussianSumVertexFit/interface/PerigeeMultiLTS.h>

Inheritance diagram for PerigeeMultiLTS:

List of all members.

Public Types
typedef ReferenceCountingPointer < LinearizedTrackState< 5 > >	RefCountedLinearizedTrackState
Public Member Functions
TrackCharge	charge () const
virtual void	checkParameters (AlgebraicVector5 &parameters) const
virtual std::vector < ReferenceCountingPointer < LinearizedTrackState< 5 > > >	components () const
	Vector of individual components in the mixture.
virtual const AlgebraicVectorN &	constantTerm () const
	Method returning the constant term of the Taylor expansion of the measurement equation for the collapsed track state.
virtual RefCountedRefittedTrackState	createRefittedTrackState (const GlobalPoint &vertexPosition, const AlgebraicVectorM &vectorParameters, const AlgebraicSymMatrixOO &covarianceMatrix) const
	Creates the correct refitted state according to the results of the track refit.
bool	hasError () const
const GlobalPoint &	linearizationPoint () const
	The point at which the track state has been linearized.
virtual const AlgebraicMatrixNM &	momentumJacobian () const
	Method returning the Momentum Jacobian from the Taylor expansion (Matrix B) for the collapsed track state.
bool	operator== (LinearizedTrackState< 5 > &other) const
virtual const AlgebraicVectorN &	parametersFromExpansion () const
	Method returning the parameters of the Taylor expansion for the collapsed track state.
virtual const AlgebraicMatrixN3 &	positionJacobian () const
	Method returning the Position Jacobian from the Taylor expansion (Matrix A) for the collapsed track state.
const TrajectoryStateClosestToPoint &	predictedState () const
	Method returning the track state at the point of closest approach to the linearization point, in the transverse plane (a.k.a.
AlgebraicSymMatrixNN	predictedStateError () const
	Method returning the covariance matrix of the track state at the transverse impact point, for the collapsed track state.
AlgebraicSymMatrixMM	predictedStateMomentumError () const
	Method returning the momentum covariance matrix of the track state at the transverse impact point, for the collapsed track state.
virtual AlgebraicVectorM	predictedStateMomentumParameters () const
	Method returning the momentum part of the parameters of the track state at the linearization point, for the collapsed track state.
AlgebraicVectorN	predictedStateParameters () const
	Method returning the parameters of the track state at the transverse impact point, for the collapsed track state.
AlgebraicSymMatrixNN	predictedStateWeight () const
	Method returning the weight matrix of the track state at the transverse impact point, for the collapsed track state.
virtual AlgebraicVector5	refittedParamFromEquation (const RefCountedRefittedTrackState &theRefittedState) const
	Method returning the parameters of the Taylor expansion evaluated with the refitted state.
const TrajectoryStateOnSurface	state () const
	Returns theoriginal (multi-state) TrajectoryStateOnSurface whith which this instance has been created with.
virtual RefCountedLinearizedTrackState	stateWithNewLinearizationPoint (const GlobalPoint &newLP) const
	Returns a new linearized state with respect to a new linearization point.
virtual reco::TransientTrack	track () const
virtual double	weightInMixture () const
	The weight of this state.
Private Member Functions
	PerigeeMultiLTS (const GlobalPoint &linP, const reco::TransientTrack &track, const TrajectoryStateOnSurface &tsos)
	Constructor with the linearization point and the track.
void	prepareCollapsedState () const
	Linearize the collapsed track state.
Private Attributes
bool	collapsedStateAvailable
RefCountedLinearizedTrackState	collapsedStateLT
std::vector < RefCountedLinearizedTrackState >	ltComp
TrackCharge	theCharge
GlobalPoint	theLinPoint
LinearizedTrackStateFactory	theLTSfactory
reco::TransientTrack	theTrack
const TrajectoryStateOnSurface	theTSOS
Friends
class	MultiPerigeeLTSFactory
	Friend class properly dealing with creation of reference-counted pointers to LinearizedTrack objects.

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Detailed Description

Multi-state version of PerigeeLinearizedTrackState.

Definition at line 14 of file PerigeeMultiLTS.h.

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Member Typedef Documentation

typedef ReferenceCountingPointer<LinearizedTrackState<5> > PerigeeMultiLTS::RefCountedLinearizedTrackState

Definition at line 19 of file PerigeeMultiLTS.h.

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Constructor & Destructor Documentation

PerigeeMultiLTS::PerigeeMultiLTS	(	const GlobalPoint &	linP,
		const reco::TransientTrack &	track,
		const TrajectoryStateOnSurface &	tsos
	)			[private]

Constructor with the linearization point and the track.

Private, can only be used by LinearizedTrackFactory.

Parameters:

	linP	The linearization point
	track	The RecTrack
	tsos	The original (multi-state) TrajectoryStateOnSurface

Definition at line 11 of file PerigeeMultiLTS.cc.

References TrajectoryStateOnSurface::components(), it, LinearizedTrackStateFactory::linearizedTrackState(), ltComp, theLinPoint, theLTSfactory, theTrack, and theTSOS.

Referenced by stateWithNewLinearizationPoint().

     : theLinPoint(linP), theTrack(track), theTSOS(tsos),
       theCharge(theTrack.charge()), collapsedStateAvailable(false)
{
  //Extract the TSOS components:

  vector<TrajectoryStateOnSurface> tsosComp = theTSOS.components();
  //cout << "PerigeeMultiLTS components: "<<tsosComp.size()<<endl;
  ltComp.reserve(tsosComp.size());
  for (vector<TrajectoryStateOnSurface>::iterator it = tsosComp.begin();
        it != tsosComp.end(); it++) {
  // cout <<(*it).globalPosition()<<endl;
    ltComp.push_back(theLTSfactory.linearizedTrackState(theLinPoint, theTrack, *it ));
  }

}

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Member Function Documentation

TrackCharge PerigeeMultiLTS::charge

(

void

)

const [inline, virtual]

Implements LinearizedTrackState< 5 >.

Definition at line 99 of file PerigeeMultiLTS.h.

References theCharge.

Referenced by createRefittedTrackState().

{return theCharge;}

void PerigeeMultiLTS::checkParameters

(

AlgebraicVector5 &

parameters

)

const [inline, virtual]

Definition at line 172 of file PerigeeMultiLTS.cc.

References python::trackProbabilityAnalysis_cff::parameters.

{
  if (parameters(2) >  M_PI) parameters(2)-= 2*M_PI;
  if (parameters(2) < -M_PI) parameters(2)+= 2*M_PI;
}

virtual std::vector<ReferenceCountingPointer<LinearizedTrackState<5> > > PerigeeMultiLTS::components

(

)

const [inline, virtual]

Vector of individual components in the mixture.

Implements LinearizedTrackState< 5 >.

Definition at line 128 of file PerigeeMultiLTS.h.

References ltComp.

                                      {return ltComp;}

const AlgebraicVector5 & PerigeeMultiLTS::constantTerm

(

)

const [virtual]

Method returning the constant term of the Taylor expansion of the measurement equation for the collapsed track state.

Method returning the constant term of the Taylor expansion of the measurement equation.

Implements LinearizedTrackState< 5 >.

Definition at line 42 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

Referenced by refittedParamFromEquation().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  return collapsedStateLT->constantTerm();
}

PerigeeMultiLTS::RefCountedRefittedTrackState PerigeeMultiLTS::createRefittedTrackState	(	const GlobalPoint &	vertexPosition,
		const AlgebraicVectorM &	vectorParameters,
		const AlgebraicSymMatrixOO &	covarianceMatrix
	)			const [virtual]

Creates the correct refitted state according to the results of the track refit.

Definition at line 143 of file PerigeeMultiLTS.cc.

References charge(), reco::TransientTrack::field(), theTrack, and PerigeeConversions::trajectoryStateClosestToPoint().

{
  PerigeeConversions perigeeConversions;
  TrajectoryStateClosestToPoint refittedTSCP =
        perigeeConversions.trajectoryStateClosestToPoint(
          vectorParameters, vertexPosition, charge(), covarianceMatrix, theTrack.field());
  return RefCountedRefittedTrackState(new PerigeeRefittedTrackState(refittedTSCP));
}

bool PerigeeMultiLTS::hasError

(

void

)

const [virtual]

Implements LinearizedTrackState< 5 >.

Definition at line 87 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  return collapsedStateLT->hasError();
}

const GlobalPoint& PerigeeMultiLTS::linearizationPoint

(

)

const [inline, virtual]

The point at which the track state has been linearized.

Implements LinearizedTrackState< 5 >.

Definition at line 38 of file PerigeeMultiLTS.h.

References theLinPoint.

{ return theLinPoint; }

const AlgebraicMatrix53 & PerigeeMultiLTS::momentumJacobian

(

)

const [virtual]

Method returning the Momentum Jacobian from the Taylor expansion (Matrix B) for the collapsed track state.

Method returning the Momentum Jacobian (Matrix B).

Implements LinearizedTrackState< 5 >.

Definition at line 60 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

Referenced by refittedParamFromEquation().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  return collapsedStateLT->momentumJacobian();
}

bool PerigeeMultiLTS::operator==

(

LinearizedTrackState< 5 > &

other

)

const

Definition at line 123 of file PerigeeMultiLTS.cc.

References theTrack, and track().

{
  const PerigeeMultiLTS* otherP =
        dynamic_cast<const PerigeeMultiLTS*>(&other);
  if (otherP == 0) {
   throw VertexException("PerigeeMultiLTS: don't know how to compare myself to non-perigee track state");
  }
  return (otherP->track() == theTrack);
}

const AlgebraicVector5 & PerigeeMultiLTS::parametersFromExpansion

(

)

const [virtual]

Method returning the parameters of the Taylor expansion for the collapsed track state.

Method returning the parameters of the Taylor expansion.

Implements LinearizedTrackState< 5 >.

Definition at line 68 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  return collapsedStateLT->parametersFromExpansion();
}

const AlgebraicMatrix53 & PerigeeMultiLTS::positionJacobian

(

)

const [virtual]

Method returning the Position Jacobian from the Taylor expansion (Matrix A) for the collapsed track state.

Method returning the Position Jacobian (Matrix A).

Implements LinearizedTrackState< 5 >.

Definition at line 51 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

Referenced by refittedParamFromEquation().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  return collapsedStateLT->positionJacobian();
}

const TrajectoryStateClosestToPoint & PerigeeMultiLTS::predictedState

(

)

const

Method returning the track state at the point of closest approach to the linearization point, in the transverse plane (a.k.a.

Method returning the TrajectoryStateClosestToPoint at the point of closest approch to the z-axis (a.k.a.

transverse impact point), for the collapsed track state

transverse impact point)

Definition at line 78 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, PerigeeLinearizedTrackState::predictedState(), and prepareCollapsedState().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  const PerigeeLinearizedTrackState* otherP =
        dynamic_cast<const PerigeeLinearizedTrackState*>(collapsedStateLT.get());
  return otherP->predictedState();
}

AlgebraicSymMatrix55 PerigeeMultiLTS::predictedStateError

(

)

const [virtual]

Method returning the covariance matrix of the track state at the transverse impact point, for the collapsed track state.

Implements LinearizedTrackState< 5 >.

Definition at line 111 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  return collapsedStateLT-> predictedStateError();
}

AlgebraicSymMatrix33 PerigeeMultiLTS::predictedStateMomentumError

(

)

const [virtual]

Method returning the momentum covariance matrix of the track state at the transverse impact point, for the collapsed track state.

Implements LinearizedTrackState< 5 >.

Definition at line 117 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  return collapsedStateLT->predictedStateMomentumError() ;
}

AlgebraicVector3 PerigeeMultiLTS::predictedStateMomentumParameters

(

)

const [virtual]

Method returning the momentum part of the parameters of the track state at the linearization point, for the collapsed track state.

Implements LinearizedTrackState< 5 >.

Definition at line 99 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  return collapsedStateLT->predictedStateMomentumParameters();
}

AlgebraicVector5 PerigeeMultiLTS::predictedStateParameters

(

)

const [virtual]

Method returning the parameters of the track state at the transverse impact point, for the collapsed track state.

Implements LinearizedTrackState< 5 >.

Definition at line 93 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  return collapsedStateLT->predictedStateParameters();
}

AlgebraicSymMatrix55 PerigeeMultiLTS::predictedStateWeight

(

)

const [virtual]

Method returning the weight matrix of the track state at the transverse impact point, for the collapsed track state.

Implements LinearizedTrackState< 5 >.

Definition at line 105 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

{
  if (!collapsedStateAvailable) prepareCollapsedState();
  return collapsedStateLT->predictedStateWeight() ;
}

void PerigeeMultiLTS::prepareCollapsedState

(

)

const [private]

Linearize the collapsed track state.

Definition at line 30 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, LinearizedTrackStateFactory::linearizedTrackState(), theLinPoint, theLTSfactory, theTrack, and theTSOS.

Referenced by constantTerm(), hasError(), momentumJacobian(), parametersFromExpansion(), positionJacobian(), predictedState(), predictedStateError(), predictedStateMomentumError(), predictedStateMomentumParameters(), predictedStateParameters(), and predictedStateWeight().

{
  if (!collapsedStateAvailable) {
    collapsedStateLT = theLTSfactory.linearizedTrackState(theLinPoint, theTrack, theTSOS);
  }
  collapsedStateAvailable = true;
}

AlgebraicVector5 PerigeeMultiLTS::refittedParamFromEquation

(

const RefCountedRefittedTrackState &

theRefittedState

)

const [virtual]

Method returning the parameters of the Taylor expansion evaluated with the refitted state.

Implements LinearizedTrackState< 5 >.

Definition at line 155 of file PerigeeMultiLTS.cc.

References constantTerm(), momentumJacobian(), and positionJacobian().

{
  AlgebraicVector3 vertexPosition;
  vertexPosition(0) = theRefittedState->position().x();
  vertexPosition(1) = theRefittedState->position().y();
  vertexPosition(2) = theRefittedState->position().z();
  AlgebraicVectorN param = constantTerm() + 
                       positionJacobian() * vertexPosition +
                       momentumJacobian() * theRefittedState->momentumVector();
  if (param(2) >  M_PI) param(2)-= 2*M_PI;
  if (param(2) < -M_PI) param(2)+= 2*M_PI;

  return param;
}

const TrajectoryStateOnSurface PerigeeMultiLTS::state

(

void

)

const [inline]

Returns theoriginal (multi-state) TrajectoryStateOnSurface whith which this instance has been created with.

Definition at line 46 of file PerigeeMultiLTS.h.

References theTSOS.

{ return theTSOS; }

PerigeeMultiLTS::RefCountedLinearizedTrackState PerigeeMultiLTS::stateWithNewLinearizationPoint

(

const GlobalPoint &

newLP

)

const [virtual]

Returns a new linearized state with respect to a new linearization point.

A new object of the same type is returned, without change to the existing one.

Implements LinearizedTrackState< 5 >.

Definition at line 136 of file PerigeeMultiLTS.cc.

References PerigeeMultiLTS(), theTSOS, and track().

{
  return RefCountedLinearizedTrackState(
                new PerigeeMultiLTS(newLP, track(), theTSOS));
}

virtual reco::TransientTrack PerigeeMultiLTS::track

(

void

)

const [inline, virtual]

Implements LinearizedTrackState< 5 >.

Definition at line 40 of file PerigeeMultiLTS.h.

References theTrack.

Referenced by operator==(), and stateWithNewLinearizationPoint().

{ return theTrack; }

virtual double PerigeeMultiLTS::weightInMixture

(

)

const [inline, virtual]

The weight of this state.

It will be the sum of the weights of the individual components in the mixture.

Implements LinearizedTrackState< 5 >.

Definition at line 122 of file PerigeeMultiLTS.h.

References theTSOS, and TrajectoryStateOnSurface::weight().

{return theTSOS.weight();}

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Friends And Related Function Documentation

friend class MultiPerigeeLTSFactory [friend]

Friend class properly dealing with creation of reference-counted pointers to LinearizedTrack objects.

Definition at line 24 of file PerigeeMultiLTS.h.

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Member Data Documentation

bool PerigeeMultiLTS::collapsedStateAvailable [mutable, private]

Definition at line 155 of file PerigeeMultiLTS.h.

Referenced by constantTerm(), hasError(), momentumJacobian(), parametersFromExpansion(), positionJacobian(), predictedState(), predictedStateError(), predictedStateMomentumError(), predictedStateMomentumParameters(), predictedStateParameters(), predictedStateWeight(), and prepareCollapsedState().

RefCountedLinearizedTrackState PerigeeMultiLTS::collapsedStateLT [mutable, private]

Definition at line 152 of file PerigeeMultiLTS.h.

Referenced by constantTerm(), hasError(), momentumJacobian(), parametersFromExpansion(), positionJacobian(), predictedState(), predictedStateError(), predictedStateMomentumError(), predictedStateMomentumParameters(), predictedStateParameters(), predictedStateWeight(), and prepareCollapsedState().

std::vector<RefCountedLinearizedTrackState> PerigeeMultiLTS::ltComp [private]

Definition at line 151 of file PerigeeMultiLTS.h.

Referenced by components(), and PerigeeMultiLTS().

TrackCharge PerigeeMultiLTS::theCharge [private]

Definition at line 154 of file PerigeeMultiLTS.h.

Referenced by charge().

GlobalPoint PerigeeMultiLTS::theLinPoint [private]

Definition at line 146 of file PerigeeMultiLTS.h.

Referenced by linearizationPoint(), PerigeeMultiLTS(), and prepareCollapsedState().

LinearizedTrackStateFactory PerigeeMultiLTS::theLTSfactory [private]

Definition at line 153 of file PerigeeMultiLTS.h.

Referenced by PerigeeMultiLTS(), and prepareCollapsedState().

reco::TransientTrack PerigeeMultiLTS::theTrack [private]

Definition at line 147 of file PerigeeMultiLTS.h.

Referenced by createRefittedTrackState(), operator==(), PerigeeMultiLTS(), prepareCollapsedState(), and track().

const TrajectoryStateOnSurface PerigeeMultiLTS::theTSOS [private]

Definition at line 150 of file PerigeeMultiLTS.h.

Referenced by PerigeeMultiLTS(), prepareCollapsedState(), state(), stateWithNewLinearizationPoint(), and weightInMixture().

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

• RecoVertex/GaussianSumVertexFit/interface/PerigeeMultiLTS.h
• RecoVertex/GaussianSumVertexFit/src/PerigeeMultiLTS.cc

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