The LCIO track class. More...

#include <pre-generated/EVENT/Track.h>

Inheritance diagram for EVENT::Track:

Public Types
typedef Track	lcobject_type
	Useful typedef for template programming with LCIO.

Public Member Functions
virtual	~Track ()
	Destructor.

virtual int	getType () const =0
	Flagword that defines the type of track. More...

virtual float	getD0 () const =0
	Impact paramter of the track in (r-phi). More...

virtual float	getPhi () const =0
	Phi of the track at the reference point. More...

virtual float	getOmega () const =0
	Omega is the signed curvature of the track in [1/mm]. More...

virtual float	getZ0 () const =0
	Impact paramter of the track in (r-z). More...

virtual float	getTanLambda () const =0
	Lambda is the dip angle of the track in r-z at the reference point. More...

virtual const FloatVec &	getCovMatrix () const =0
	Covariance matrix of the track parameters. More...

virtual const float *	getReferencePoint () const =0
	Reference point of the track parameters. More...

virtual float	getChi2 () const =0
	True if the reference point is the point of closest approach. More...

virtual int	getNdf () const =0
	Number of degrees of freedom of the track fit.

virtual float	getdEdx () const =0
	dEdx of the track.

virtual float	getdEdxError () const =0
	Error of dEdx.

virtual float	getRadiusOfInnermostHit () const =0
	The radius of the innermost hit that has been used in the track fit. More...

virtual const IntVec &	getSubdetectorHitNumbers () const =0
	A vector that holds the number of hits in particular subdetectors. More...

virtual const TrackVec &	getTracks () const =0
	The tracks that have been combined to this track.

virtual const TrackStateVec &	getTrackStates () const =0
	Returns track states associtated to this track. More...

virtual const TrackState *	getClosestTrackState (float x, float y, float z) const =0
	Returns track state closest to the given point. More...

virtual const TrackState *	getTrackState (int location) const =0
	Returns track state for the given location - or NULL if not found. More...

virtual const TrackerHitVec &	getTrackerHits () const =0
	Optionaly ( check/set flag(LCIO::TRBIT_HITS)==1) return the hits that have been used to create this track.

Public Member Functions inherited from EVENT::LCObject
virtual	~LCObject ()
	Destructor.

virtual int	id () const =0
	Returns an object id for internal (debugging) use in LCIO.

virtual LCObject *	clone () const
	Returns an object id for internal (debugging) use in LCIO. More...

Public Member Functions inherited from lcrtrel::LCRTRelations
template<class V >
V::ext_type	ext ()
	Provides access to an extension object - the type and ownership is defined by the class V which should be a subtype of LCExtension, LCOwnedExtension, LCExtensionVector, LCExtensionList,...

template<class V >
const V::ext_type	ext () const

template<class V >
V::rel_type	rel ()
	Provides read access to relations - the object types and their connectivity are defined by the class V which has to be a subtype of either LC1To1Relation, LC1ToNRelation or LCNToNRelation.

Additional Inherited Members
Protected Member Functions inherited from lcrtrel::LCRTRelations
template<class V >
V::ptr &	ptr () const
	Returns the reference to the pointer to the extension/relation object.

Detailed Description

The LCIO track class.

The helix parameterization follows that of the L3 experiment at LEP. A detailed description of the track parameters is given in the LC-Note LC-DET-2006-004 "Track Parameters in LCIO" (pdf).

Author: gaede

Version

Id:: Track.aid,v 1.15 2007-09-18 09:47:09 gaede Exp

Member Function Documentation

virtual float EVENT::Track::getChi2 ( ) const

pure virtual

True if the reference point is the point of closest approach.

Chi^2 of the track fit.

Implemented in IMPL::TrackImpl.

Referenced by SIO::SIOTrackHandler::write().

virtual const TrackState* EVENT::Track::getClosestTrackState	(	float	x,
		float	y,
		float	z
	)		const

pure virtual

Returns track state closest to the given point.

See Also: TrackState.

Implemented in IMPL::TrackImpl.

virtual const FloatVec& EVENT::Track::getCovMatrix ( ) const

pure virtual

Covariance matrix of the track parameters.

Stored as lower triangle matrix where the order of parameters is: d0, phi, omega, z0, tan(lambda). So we have cov(d0,d0), cov( phi, d0 ), cov( phi, phi), ... Information is stored in the first TrackState of this Track,

See Also: TrackState.

Implemented in IMPL::TrackImpl.

virtual float EVENT::Track::getD0 ( ) const

pure virtual

Impact paramter of the track in (r-phi).

Information is stored in the first TrackState of this Track,

See Also: TrackState.

Implemented in IMPL::TrackImpl.

virtual float EVENT::Track::getOmega ( ) const

pure virtual

Omega is the signed curvature of the track in [1/mm].

The sign is that of the particle's charge. Information is stored in the first TrackState of this Track,

See Also: TrackState.

Implemented in IMPL::TrackImpl.

virtual float EVENT::Track::getPhi ( ) const

pure virtual

Phi of the track at the reference point.

See Also: getReferencePoint Information is stored in the first TrackState of this Track,; TrackState.

Implemented in IMPL::TrackImpl.

virtual float EVENT::Track::getRadiusOfInnermostHit ( ) const

pure virtual

The radius of the innermost hit that has been used in the track fit.

Helps to detect V0 tracks with small impact paramters or heavy mesons. To be used as convenient information or if hits are not stored in the data set, e.g. DST or FastMC.

Implemented in IMPL::TrackImpl.

Referenced by SIO::SIOTrackHandler::write().

virtual const float* EVENT::Track::getReferencePoint ( ) const

pure virtual

Reference point of the track parameters.

The default for the reference point is the point of closest approach. Information is stored in the first TrackState of this Track,

See Also: TrackState.

Implemented in IMPL::TrackImpl.

virtual const IntVec& EVENT::Track::getSubdetectorHitNumbers ( ) const

pure virtual

A vector that holds the number of hits in particular subdetectors.

The mapping of indices to subdetectors is implementation dependent. To be used as convenient information or if hits are not stored in the data set, e.g. DST or FastMC. Check/set collection variable TrackSubdetectorNames for decoding the indices.

Implemented in IMPL::TrackImpl.

Referenced by SIO::SIOTrackHandler::write().

virtual float EVENT::Track::getTanLambda ( ) const

pure virtual

Lambda is the dip angle of the track in r-z at the reference point.

See Also: getReferencePoint Information is stored in the first TrackState of this Track,; TrackState.

Implemented in IMPL::TrackImpl.

virtual const TrackState* EVENT::Track::getTrackState ( int location ) const

pure virtual

Returns track state for the given location - or NULL if not found.

See Also: TrackState. location can be: TrackState::AtIP, TrackState::AtFirstHit, TrackState::AtLastHit, TrackState::AtCalorimeter, TrackState::AtVertex, TrackState::AtOther

Implemented in IMPL::TrackImpl.

virtual const TrackStateVec& EVENT::Track::getTrackStates ( ) const

pure virtual

Returns track states associtated to this track.

See Also: TrackState.

Implemented in IMPL::TrackImpl.

Referenced by SIO::SIOTrackHandler::write().

virtual int EVENT::Track::getType ( ) const

pure virtual

Flagword that defines the type of track.

Bits 0-15 can be used to denote the subdetectors that have contributed hits used in the track fit. For the definition of the bits check/Set the collection variables TrackTypeBitNames and TrackTypeBitIndices. Bits 16-31 are used internally.

Implemented in IMPL::TrackImpl.

Referenced by SIO::SIOTrackHandler::write().

virtual float EVENT::Track::getZ0 ( ) const

pure virtual

Impact paramter of the track in (r-z).

Information is stored in the first TrackState of this Track,

See Also: TrackState.

Implemented in IMPL::TrackImpl.

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

Track.h

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation