PropagatorWithMaterial Class Reference

#include <PropagatorWithMaterial.h>

Inheritance diagram for PropagatorWithMaterial:

Public Types
enum	MaterialLocation { atSource, atDestination, fromDirection }

Public Member Functions
virtual PropagatorWithMaterial *	clone () const
const Propagator &	geometricalPropagator () const
	Access to the geometrical propagator. More...
virtual const MagneticField *	magneticField () const
const MaterialEffectsUpdator &	materialEffectsUpdator () const
	Access to the MaterialEffectsUpdator. More...
	PropagatorWithMaterial (PropagationDirection dir, const float mass, const MagneticField *mf=0, const float maxDPhi=1.6, bool useRungeKutta=false, float ptMin=-1., bool useOldGeoPropLogic=true)
void	setMaterialLocation (const MaterialLocation location)
virtual bool	setMaxDirectionChange (float phiMax)
	Limit on change in azimuthal angle. More...
virtual void	setPropagationDirection (PropagationDirection dir) override
	Propagation direction. More...
virtual	~PropagatorWithMaterial ()
Public Member Functions inherited from Propagator
virtual FreeTrajectoryState	propagate (const FreeTrajectoryState &ftsStart, const GlobalPoint &pDest) const final
virtual FreeTrajectoryState	propagate (const FreeTrajectoryState &ftsStart, const GlobalPoint &pDest1, const GlobalPoint &pDest2) const final
virtual FreeTrajectoryState	propagate (const FreeTrajectoryState &ftsStart, const reco::BeamSpot &beamSpot) const final
virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const FreeTrajectoryState &, const Surface &) const final
virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const TrajectoryStateOnSurface &tsos, const Surface &sur) const final
virtual std::pair < FreeTrajectoryState, double >	propagateWithPath (const FreeTrajectoryState &ftsStart, const GlobalPoint &pDest) const
virtual std::pair < FreeTrajectoryState, double >	propagateWithPath (const FreeTrajectoryState &ftsStart, const GlobalPoint &pDest1, const GlobalPoint &pDest2) const
	Propagate to PCA to a line (given by 2 points) given a starting point. More...
virtual std::pair < FreeTrajectoryState, double >	propagateWithPath (const FreeTrajectoryState &ftsStart, const reco::BeamSpot &beamSpot) const
	Propagate to PCA to a line (given by beamSpot position and slope) given a starting point. More...
virtual PropagationDirection	propagationDirection () const
	Propagator (PropagationDirection dir=alongMomentum)
virtual	~Propagator ()

Private Types
typedef std::pair < TrajectoryStateOnSurface, double >	TsosWP

Private Member Functions
bool	materialAtSource () const
	Inclusion of material at the source? More...
virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const TrajectoryStateOnSurface &tsos, const Plane &plane) const override
virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const FreeTrajectoryState &fts, const Plane &plane) const override
virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const TrajectoryStateOnSurface &tsos, const Cylinder &cylinder) const override
virtual std::pair < TrajectoryStateOnSurface, double >	propagateWithPath (const FreeTrajectoryState &fts, const Cylinder &cylinder) const override

Private Attributes
const MagneticField *	field
defaultRKPropagator::Product	rkProduct
DeepCopyPointerByClone < Propagator >	theGeometricalPropagator
MaterialLocation	theMaterialLocation
DeepCopyPointerByClone < MaterialEffectsUpdator >	theMEUpdator
bool	useRungeKutta_

Detailed Description

Propagation including material effects.

Propagates using a specific for the geometrical part and a MaterialEffectsUpdator to include multiple scattering and energy loss. By default material effects are included at the source in the case of forward propagation and at the destination for backward propagation. Material effects at the source can only be included when propagating from a TrajectoryStateOnSurface. Ported from ORCA.

Author

todorov, cerati

Definition at line 25 of file PropagatorWithMaterial.h.

Member Typedef Documentation

typedef std::pair<TrajectoryStateOnSurface,double> PropagatorWithMaterial::TsosWP

private

Definition at line 113 of file PropagatorWithMaterial.h.

Member Enumeration Documentation

enum PropagatorWithMaterial::MaterialLocation

Enumerator
atSource
atDestination
fromDirection

Definition at line 71 of file PropagatorWithMaterial.h.

{atSource, atDestination, fromDirection};

Constructor & Destructor Documentation

PropagatorWithMaterial::PropagatorWithMaterial	(	PropagationDirection	dir,
		const float	mass,
		const MagneticField *	mf = 0,
		const float	maxDPhi = 1.6,
		bool	useRungeKutta = false,
		float	ptMin = -1.,
		bool	useOldGeoPropLogic = true
	)

Constructor with PropagationDirection and mass hypothesis. Uses AnalyticalPropagator and CombinedMaterialEffectsUpdator with explicit mass hypothesis.MaxDPhi is a cut on the max change in phi during state propagation. For propagation of very low pt tracks (e.g. loopers), this cut can be loosened. If ptMin > 0, then multiple scattering calculations will take into account the uncertainty in the reconstructed track momentum, (by default neglected), but assuming that the track Pt will never fall below ptMin.

Definition at line 13 of file PropagatorWithMaterial.cc.

Referenced by clone().

                                                                                      :
  Propagator(dir),
  rkProduct(mf,dir),
  theGeometricalPropagator(useRungeKutta ?
               rkProduct.propagator.clone() :
               new AnalyticalPropagator(mf,dir,maxDPhi,useOldAnalPropLogic)
               ),
  theMEUpdator(new CombinedMaterialEffectsUpdator(mass, ptMin)),
  theMaterialLocation(atDestination), field(mf),useRungeKutta_(useRungeKutta) {


}

PropagatorWithMaterial::~PropagatorWithMaterial ( )

virtual

Definition at line 10 of file PropagatorWithMaterial.cc.

{}

Member Function Documentation

virtual PropagatorWithMaterial* PropagatorWithMaterial::clone ( void  ) const

inlinevirtual

Implements Propagator.

Definition at line 95 of file PropagatorWithMaterial.h.

References PropagatorWithMaterial().

    {
      return new PropagatorWithMaterial(*this);
    }

const Propagator& PropagatorWithMaterial::geometricalPropagator ( ) const

inline

Access to the geometrical propagator.

Definition at line 84 of file PropagatorWithMaterial.h.

References theGeometricalPropagator.

                                                  {
    return *theGeometricalPropagator;
  }

virtual const MagneticField* PropagatorWithMaterial::magneticField ( ) const

inlinevirtual

Implements Propagator.

Definition at line 92 of file PropagatorWithMaterial.h.

References field.

{return field;}

bool PropagatorWithMaterial::materialAtSource ( ) const

private

Inclusion of material at the source?

Definition at line 118 of file PropagatorWithMaterial.cc.

References alongMomentum, anyDirection, atDestination, atSource, Exception, fromDirection, Propagator::propagationDirection(), theMaterialLocation, and unlikely.

Referenced by propagateWithPath().

                                               {
  if unlikely( (propagationDirection()==anyDirection) &&  (theMaterialLocation!=atDestination) )
           throw cms::Exception("TrackingTools/MaterialEffects",
                    "PropagatorWithMaterial: propagation direction = anyDirection is incompatible with adding of material at source");

  return theMaterialLocation==atSource || (theMaterialLocation==fromDirection&&
                       propagationDirection()==alongMomentum);
}

const MaterialEffectsUpdator& PropagatorWithMaterial::materialEffectsUpdator ( ) const

inline

Access to the MaterialEffectsUpdator.

Definition at line 88 of file PropagatorWithMaterial.h.

References theMEUpdator.

                                                               {
    return *theMEUpdator;
  }

pair< TrajectoryStateOnSurface, double > PropagatorWithMaterial::propagateWithPath ( const TrajectoryStateOnSurface &  tsos, const Plane &  plane  ) const

overrideprivatevirtual

Reimplemented from Propagator.

Definition at line 59 of file PropagatorWithMaterial.cc.

References materialAtSource(), Propagator::propagateWithPath(), Propagator::propagationDirection(), theGeometricalPropagator, theMEUpdator, unlikely, and MaterialEffectsUpdator::updateStateInPlace().

                                                 {
  //
  // add material at starting surface, if requested
  //
  TsosWP newTsosWP(tsos,0.);
  if ( materialAtSource() ) {
    bool updateOk = theMEUpdator->updateStateInPlace(newTsosWP.first,propagationDirection());
    if unlikely(!updateOk) newTsosWP.first = TrajectoryStateOnSurface();
  }
  if unlikely( !newTsosWP.first.isValid() )  return newTsosWP;
  //
  // geometrical propagation
  //
  newTsosWP = theGeometricalPropagator->propagateWithPath(newTsosWP.first,plane);
  if unlikely( !newTsosWP.first.isValid() || materialAtSource() )  return newTsosWP;
  //
  // add material at destination surface, if requested
  //
  bool updateOk = theMEUpdator->updateStateInPlace(newTsosWP.first,
                                                   PropagationDirectionFromPath()(newTsosWP.second,
                                                                                  propagationDirection()));
  if unlikely(!updateOk) newTsosWP.first = TrajectoryStateOnSurface();
  return newTsosWP;
}

pair< TrajectoryStateOnSurface, double > PropagatorWithMaterial::propagateWithPath ( const FreeTrajectoryState &  fts, const Plane &  plane  ) const

overrideprivatevirtual

Implements Propagator.

Definition at line 32 of file PropagatorWithMaterial.cc.

References materialAtSource(), Propagator::propagateWithPath(), Propagator::propagationDirection(), theGeometricalPropagator, theMEUpdator, unlikely, and MaterialEffectsUpdator::updateStateInPlace().

                                                 {
  TsosWP newTsosWP = theGeometricalPropagator->propagateWithPath(fts,plane);
  if ( (newTsosWP.first).isValid() && !materialAtSource() ) {
      bool updateOk = theMEUpdator->updateStateInPlace(newTsosWP.first,
                                                       PropagationDirectionFromPath()(newTsosWP.second,
                                                                                      propagationDirection()));
      if unlikely(!updateOk) newTsosWP.first = TrajectoryStateOnSurface();
  }
  return newTsosWP;
}

pair< TrajectoryStateOnSurface, double > PropagatorWithMaterial::propagateWithPath ( const TrajectoryStateOnSurface &  tsos, const Cylinder &  cylinder  ) const

overrideprivatevirtual

Reimplemented from Propagator.

Definition at line 86 of file PropagatorWithMaterial.cc.

References materialAtSource(), Propagator::propagateWithPath(), Propagator::propagationDirection(), theGeometricalPropagator, theMEUpdator, unlikely, and MaterialEffectsUpdator::updateStateInPlace().

                                                       {
  //
  // add material at starting surface, if requested
  //
  TsosWP newTsosWP(tsos,0.);
  if ( materialAtSource() ) {
    bool updateOk = theMEUpdator->updateStateInPlace(newTsosWP.first,propagationDirection());
    if unlikely(!updateOk) newTsosWP.first = TrajectoryStateOnSurface();
  }
  if unlikely( !newTsosWP.first.isValid() )  return newTsosWP;
  //
  // geometrical propagation
  //
  newTsosWP = theGeometricalPropagator->propagateWithPath(newTsosWP.first,cylinder);
  if unlikely( !(newTsosWP.first).isValid() || materialAtSource() )  return newTsosWP;
  //
  // add material at destination surface, if requested
  //
  bool updateOk = theMEUpdator->updateStateInPlace(newTsosWP.first,
                                                   PropagationDirectionFromPath()(newTsosWP.second,
                                                                                  propagationDirection()));
  if unlikely(!updateOk) newTsosWP.first = TrajectoryStateOnSurface();
  return newTsosWP;
}

pair< TrajectoryStateOnSurface, double > PropagatorWithMaterial::propagateWithPath ( const FreeTrajectoryState &  fts, const Cylinder &  cylinder  ) const

overrideprivatevirtual

Implements Propagator.

Definition at line 45 of file PropagatorWithMaterial.cc.

References materialAtSource(), Propagator::propagateWithPath(), Propagator::propagationDirection(), theGeometricalPropagator, theMEUpdator, unlikely, and MaterialEffectsUpdator::updateStateInPlace().

                                                       {
  TsosWP newTsosWP = theGeometricalPropagator->propagateWithPath(fts,cylinder);
  if ( (newTsosWP.first).isValid() && !materialAtSource() ) {
      bool updateOk = theMEUpdator->updateStateInPlace(newTsosWP.first,
                                                       PropagationDirectionFromPath()(newTsosWP.second,
                                                                                      propagationDirection()));
      if unlikely(!updateOk) newTsosWP.first = TrajectoryStateOnSurface();
  }
  return newTsosWP;
}

void PropagatorWithMaterial::setMaterialLocation ( const MaterialLocation  location )

inline

Choice of location for including material effects: fromDirection is equivalent to atSource for propagation alongMomentum and to atDestination for propagation oppositeToMomentum. Inclusion of material effects at the source (either explicitely or implicitely) is not possible if propagating with anyDirection and will effectively disable material effects when propagating from a FreeTrajectoryState.

Definition at line 80 of file PropagatorWithMaterial.h.

References theMaterialLocation.

                                                             {
    theMaterialLocation = location;
  }

virtual bool PropagatorWithMaterial::setMaxDirectionChange ( float  phiMax )

inlinevirtual

Limit on change in azimuthal angle.

Reimplemented from Propagator.

Definition at line 65 of file PropagatorWithMaterial.h.

References Propagator::setMaxDirectionChange(), and theGeometricalPropagator.

                                                    {
    return theGeometricalPropagator->setMaxDirectionChange(phiMax);
  }

void PropagatorWithMaterial::setPropagationDirection ( PropagationDirection  dir )

overridevirtual

Propagation direction.

Reimplemented from Propagator.

Definition at line 112 of file PropagatorWithMaterial.cc.

References Propagator::setPropagationDirection(), and theGeometricalPropagator.

                                                                              {
  theGeometricalPropagator->setPropagationDirection(dir);
  Propagator::setPropagationDirection(dir);
}

Member Data Documentation

const MagneticField* PropagatorWithMaterial::field

private

Definition at line 116 of file PropagatorWithMaterial.h.

Referenced by magneticField().

defaultRKPropagator::Product PropagatorWithMaterial::rkProduct

private

Definition at line 107 of file PropagatorWithMaterial.h.

DeepCopyPointerByClone<Propagator> PropagatorWithMaterial::theGeometricalPropagator

private

Definition at line 108 of file PropagatorWithMaterial.h.

Referenced by geometricalPropagator(), propagateWithPath(), setMaxDirectionChange(), and setPropagationDirection().

MaterialLocation PropagatorWithMaterial::theMaterialLocation

private

Definition at line 115 of file PropagatorWithMaterial.h.

Referenced by materialAtSource(), and setMaterialLocation().

DeepCopyPointerByClone<MaterialEffectsUpdator> PropagatorWithMaterial::theMEUpdator

private

Definition at line 112 of file PropagatorWithMaterial.h.

Referenced by materialEffectsUpdator(), and propagateWithPath().

bool PropagatorWithMaterial::useRungeKutta_

private

Definition at line 117 of file PropagatorWithMaterial.h.