representation of all charged final states FIXME rename since this name is taken in tracking
More...

#include <RecoTrack.h>

Inheritance diagram for RecoTrack:

Collaboration diagram for RecoTrack:

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Public Types
enum	TFParticleType { kInteractionPoint , kOrigin , kComposite , kRecoResonance , kInternalParticle , kRecoTrack , kResonance , kRecoPhoton , kRecoKlong , kMissingParticle }
	particle types

typedef std::vector< Constraint >	constraintlist
	alias

typedef std::vector< std::pair< const ParticleBase *, int > >	indexmap
	alias

Public Member Functions
	RecoTrack (Belle2::Particle bc, const ParticleBase mother)
	constructor

virtual	~RecoTrack ()
	destructor

virtual ErrCode	initParticleWithMother (FitParams &fitparams) override
	init with mother particle (replacing initPar2)

virtual ErrCode	initMotherlessParticle (FitParams &fitparams) override
	init without mother particle

ErrCode	initCovariance (FitParams &fitparams) const override
	init covariance matrix of this particle constraint

ErrCode	updFltToMotherCopy (const FitParams *fitparams)
	update m_flt

virtual ErrCode	projectRecoConstraint (const FitParams &, Projection &) const override
	project the constraint (calculate residuals)

ErrCode	updateParams (double flt)
	updated the cached parameters

virtual int	dimM () const override
	dimension (5)

virtual int	type () const override
	type of the constraint

virtual int	nFinalChargedCandidates () const override
	number of final charged candidates

virtual void	addToConstraintList (constraintlist &alist, int depth) const override
	add to the list of constraints

ErrCode	updFltToMother (const FitParams &fitparams)
	update flight length to mother

void	setFlightLength (double flt)
	setter for the flight length

virtual std::string	parname (int index) const override
	name

virtual int	dim () const override
	this here sets the size in the state vector we are only interested in the momenta of photons and tracks as the position were the track ends or the cluster is, is not relevant for physics

virtual int	momIndex () const override
	get momentum index

virtual bool	hasEnergy () const override
	has an energy in the statevector?

virtual ErrCode	projectConstraint (Constraint::Type, const FitParams &, Projection &) const override
	abstract abstract projection

virtual void	updateIndex (int &offset)
	this sets the index for momentum, position, etc. More...

const ParticleBase *	locate (Belle2::Particle *particle) const
	get particle base from basf2 particle

Belle2::Particle *	particle () const
	get basf2 particle

int	index () const
	get index

const ParticleBase *	mother () const
	getMother() / hasMother()

virtual ErrCode	projectGeoConstraint (const FitParams &, Projection &) const
	project geometrical constraint More...

virtual ErrCode	projectMassConstraintParticle (const FitParams &, Projection &) const
	project mass constraint using the particles parameters More...

virtual ErrCode	projectMassConstraintDaughters (const FitParams &, Projection &) const
	project mass constraint using the parameters of the daughters More...

virtual ErrCode	projectMassConstraint (const FitParams &, Projection &) const
	project mass constraint abstract

virtual void	forceP4Sum (FitParams &) const
	force p4 sum conservation all along the tree

virtual int	posIndex () const
	get vertex index (in statevector!)

virtual int	tauIndex () const
	get tau index

virtual bool	hasPosition () const
	get false

int	eneIndex () const
	get energy index

virtual double	chiSquare (const FitParams &) const
	get chi2

int	charge () const
	get charge

virtual ParticleBase *	addDaughter (Belle2::Particle *, const ConstraintConfiguration &config, bool forceFitAll=false)
	add daughter

virtual void	removeDaughter (const ParticleBase *pb)
	remove daughter

virtual void	retrieveIndexMap (indexmap &anindexmap) const
	get index map

void	setMother (const ParticleBase *m)
	set mother

void	collectVertexDaughters (std::vector< ParticleBase * > &particles, int posindex)
	get vertex daughters

Static Public Member Functions
static ParticleBase *	createParticle (Belle2::Particle particle, const ParticleBase mother, const ConstraintConfiguration &config, bool forceFitAll=false)
	create the according treeFitter particle obj for a basf2 particle type

static ParticleBase *	createOrigin (Belle2::Particle *daughter, const ConstraintConfiguration &config, bool forceFitAll)
	create a custom origin particle or a beamspot

Protected Types
typedef std::vector< ParticleBase * >	ParticleContainer
	just an alias

Protected Member Functions
ErrCode	initTau (FitParams &par) const
	initialises tau as a length

void	setIndex (int i)
	set Index (in statevector)

Static Protected Member Functions
static bool	isAResonance (Belle2::Particle *particle)
	controls if a particle is treated as a resonance(lifetime=0) or a particle that has a finite lifetime. More...

Protected Attributes
Belle2::Particle *	m_particle
	pointer to framework type

const ParticleBase *	m_mother
	motherparticle

std::vector< ParticleBase * >	m_daughters
	daughter container

bool	m_isStronglyDecayingResonance
	decay length less than 1 micron

const ConstraintConfiguration *	m_config
	has all the constraint config

Private Attributes
double	m_bfield
	B field along z

const Belle2::TrackFitResult *	m_trackfit
	trackfit result from reconstruction

bool	m_cached
	flag to mark the particle as initialised

double	m_flt
	helix arc length at vertex

Eigen::Matrix< double, 1, 5 >	m_params
	column vector to store the measurement

Eigen::Matrix< double, 5, 5 >	m_covariance
	only lower triangle filled!

const float	m_momentumScalingFactor
	scale the momenta by this correction factor

int	m_index
	index

std::string	m_name
	name

Detailed Description

representation of all charged final states FIXME rename since this name is taken in tracking

Definition at line 18 of file RecoTrack.h.

Member Function Documentation

◆ isAResonance()

bool isAResonance ( Belle2::Particle * particle )

staticprotectedinherited

controls if a particle is treated as a resonance(lifetime=0) or a particle that has a finite lifetime.

A finite life time means it will register a geo constraint for this particle

Definition at line 134 of file ParticleBase.cc.

◆ projectGeoConstraint()

ErrCode projectGeoConstraint	(	const FitParams &	fitparams,
		Projection &	p
	)		const

virtualinherited

project geometrical constraint

the direction of the momentum is very well known from the kinematic constraints that is why we do not extract the distance as a vector here

Definition at line 249 of file ParticleBase.cc.

◆ projectMassConstraintDaughters()

ErrCode projectMassConstraintDaughters	(	const FitParams &	fitparams,
		Projection &	p
	)		const

virtualinherited

project mass constraint using the parameters of the daughters

be aware that the signs here are important E-|p|-m extracts a negative mass and messes with the momentum !

Definition at line 314 of file ParticleBase.cc.

◆ projectMassConstraintParticle()

ErrCode projectMassConstraintParticle	(	const FitParams &	fitparams,
		Projection &	p
	)		const

virtualinherited

project mass constraint using the particles parameters

be aware that the signs here are important E-|p|-m extracts a negative mass and messes with the momentum !

Definition at line 375 of file ParticleBase.cc.

◆ updateIndex()

void updateIndex ( int & offset )

virtualinherited

this sets the index for momentum, position, etc.

in the statevector

Definition at line 84 of file ParticleBase.cc.

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

analysis/VertexFitting/TreeFitter/include/RecoTrack.h
analysis/VertexFitting/TreeFitter/src/RecoTrack.cc

Public Types

Public Member Functions

Static Public Member Functions

Protected Types

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Private Attributes

Detailed Description

Member Function Documentation

◆ isAResonance()

◆ projectGeoConstraint()

◆ projectMassConstraintDaughters()

◆ projectMassConstraintParticle()

◆ updateIndex()