PerigeeMultiLTS Class Reference

#include <PerigeeMultiLTS.h>

Inheritance diagram for PerigeeMultiLTS:

Public Types
typedef ReferenceCountingPointer < LinearizedTrackState< 5 > >	RefCountedLinearizedTrackState
Public Types inherited from LinearizedTrackState< 5 >
typedef ROOT::Math::SMatrix < double, N-2, 3, ROOT::Math::MatRepStd < double, N-2, 3 > >	AlgebraicMatrixM3
typedef ROOT::Math::SMatrix < double, N, 3, ROOT::Math::MatRepStd < double, N, 3 > >	AlgebraicMatrixN3
typedef ROOT::Math::SMatrix < double, N, N-2, ROOT::Math::MatRepStd< double, N, N-2 > >	AlgebraicMatrixNM
typedef ROOT::Math::SMatrix < double, N-2, N-2, ROOT::Math::MatRepSym< double, N-2 > >	AlgebraicSymMatrixMM
typedef ROOT::Math::SMatrix < double, N, N, ROOT::Math::MatRepSym< double, N > >	AlgebraicSymMatrixNN
typedef ROOT::Math::SMatrix < double, N+1, N+1, ROOT::Math::MatRepSym< double, N+1 > >	AlgebraicSymMatrixOO
typedef ROOT::Math::SVector < double, N-2 >	AlgebraicVectorM
typedef ROOT::Math::SVector < double, N >	AlgebraicVectorN
typedef ReferenceCountingPointer < RefittedTrackState< N > >	RefCountedRefittedTrackState

Public Member Functions
TrackCharge	charge () const
virtual void	checkParameters (AlgebraicVector5 &parameters) const
virtual std::vector < ReferenceCountingPointer < LinearizedTrackState< 5 > > >	components () const
virtual const AlgebraicVectorN &	constantTerm () const
virtual RefCountedRefittedTrackState	createRefittedTrackState (const GlobalPoint &vertexPosition, const AlgebraicVectorM &vectorParameters, const AlgebraicSymMatrixOO &covarianceMatrix) const
bool	hasError () const
const GlobalPoint &	linearizationPoint () const
virtual const AlgebraicMatrixNM &	momentumJacobian () const
bool	operator== (LinearizedTrackState< 5 > &other) const
virtual const AlgebraicVectorN &	parametersFromExpansion () const
virtual const AlgebraicMatrixN3 &	positionJacobian () const
const TrajectoryStateClosestToPoint &	predictedState () const
AlgebraicSymMatrixNN	predictedStateError () const
AlgebraicSymMatrixMM	predictedStateMomentumError () const
virtual AlgebraicVectorM	predictedStateMomentumParameters () const
AlgebraicVectorN	predictedStateParameters () const
AlgebraicSymMatrixNN	predictedStateWeight (int &error) const
virtual AlgebraicVector5	refittedParamFromEquation (const RefCountedRefittedTrackState &theRefittedState) const
const TrajectoryStateOnSurface	state () const
virtual RefCountedLinearizedTrackState	stateWithNewLinearizationPoint (const GlobalPoint &newLP) const
virtual reco::TransientTrack	track () const
virtual double	weightInMixture () const
Public Member Functions inherited from LinearizedTrackState< 5 >
virtual void	checkParameters (AlgebraicVectorN &parameters) const
virtual bool	isValid () const
virtual bool	operator== (LinearizedTrackState< N > &other) const =0
virtual	~LinearizedTrackState ()

Private Member Functions
	PerigeeMultiLTS (const GlobalPoint &linP, const reco::TransientTrack &track, const TrajectoryStateOnSurface &tsos)
void	prepareCollapsedState () const

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

Detailed Description

Multi-state version of PerigeeLinearizedTrackState

Definition at line 14 of file PerigeeMultiLTS.h.

Member Typedef Documentation

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

Definition at line 19 of file PerigeeMultiLTS.h.

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(), LinearizedTrackStateFactory::linearizedTrackState(), ltComp, theLinPoint, theLTSfactory, theTrack, and theTSOS.

     : 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 ));
  }

}

Member Function Documentation

TrackCharge PerigeeMultiLTS::charge ( void  ) const

inlinevirtual

Implements LinearizedTrackState< 5 >.

Definition at line 100 of file PerigeeMultiLTS.h.

References theCharge.

Referenced by createRefittedTrackState().

{return theCharge;}

void PerigeeMultiLTS::checkParameters ( AlgebraicVector5 &  parameters ) const

inlinevirtual

Definition at line 172 of file PerigeeMultiLTS.cc.

References M_PI, and ExpressReco_HICollisions_FallBack::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

inlinevirtual

Vector of individual components in the mixture.

Implements LinearizedTrackState< 5 >.

Definition at line 129 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.

Implements LinearizedTrackState< 5 >.

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, vectorParameters));
}

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

inlinevirtual

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. transverse impact point), for the collapsed track state

Method returning the TrajectoryStateClosestToPoint at the point of closest approch to the z-axis (a.k.a. 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 ( int &  error ) const

virtual

Method returning the weight matrix of the track state at the transverse impact point, for the collapsed track state The error variable is 0 in case of success.

Implements LinearizedTrackState< 5 >.

Definition at line 105 of file PerigeeMultiLTS.cc.

References collapsedStateAvailable, collapsedStateLT, and prepareCollapsedState().

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

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(), M_PI, 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 ( ) 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 ExpressReco_HICollisions_FallBack::track.

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

virtual reco::TransientTrack PerigeeMultiLTS::track ( void  ) const

inlinevirtual

Implements LinearizedTrackState< 5 >.

Definition at line 40 of file PerigeeMultiLTS.h.

References theTrack.

Referenced by operator==().

{ return theTrack; }

virtual double PerigeeMultiLTS::weightInMixture ( ) const

inlinevirtual

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 123 of file PerigeeMultiLTS.h.

References theTSOS, and TrajectoryStateOnSurface::weight().

{return theTSOS.weight();}

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.

Member Data Documentation

bool PerigeeMultiLTS::collapsedStateAvailable

mutableprivate

Definition at line 156 of file PerigeeMultiLTS.h.

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

RefCountedLinearizedTrackState PerigeeMultiLTS::collapsedStateLT

mutableprivate

Definition at line 153 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 152 of file PerigeeMultiLTS.h.

Referenced by components(), and PerigeeMultiLTS().

TrackCharge PerigeeMultiLTS::theCharge

private

Definition at line 155 of file PerigeeMultiLTS.h.

Referenced by charge().

GlobalPoint PerigeeMultiLTS::theLinPoint

private

Definition at line 147 of file PerigeeMultiLTS.h.

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

LinearizedTrackStateFactory PerigeeMultiLTS::theLTSfactory

private

Definition at line 154 of file PerigeeMultiLTS.h.

Referenced by PerigeeMultiLTS(), and prepareCollapsedState().

reco::TransientTrack PerigeeMultiLTS::theTrack

private

Definition at line 148 of file PerigeeMultiLTS.h.

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

const TrajectoryStateOnSurface PerigeeMultiLTS::theTSOS

private

Definition at line 151 of file PerigeeMultiLTS.h.

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