A class for composite particles, where the daughters must be ignored by the fitter. More...

#include <Composite.h>

Inheritance diagram for Composite:

Collaboration diagram for Composite:

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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
	Composite (Belle2::Particle bc, const ParticleBase mother, const ConstraintConfiguration &config, bool massconstraint=false)
	constructor

virtual	~Composite ()
	destructor

virtual ErrCode	initParticleWithMother (FitParams &fitparams) override
	init particle in case it has a mother

virtual ErrCode	initMotherlessParticle (FitParams &fitparams) override
	init particle in case it has no mother

void	updateParams ()
	update changed params

ErrCode	projectComposite (const FitParams &fitparams, Projection &p) const
	project this particle constraint

int	dimMeas () const
	dimension of the measurement vector

virtual int	dim () const override
	get dimension of constraint

int	dimM () const
	get dimension of measurement

virtual ErrCode	projectConstraint (Constraint::Type, const FitParams &, Projection &) const override
	project this constraint

virtual int	type () const override
	get ype

virtual int	posIndex () const override
	get position index in statevectof x,y,z,tau,px,py,pz

virtual int	tauIndex () const override
	get tau (lifetime) index in statevector

virtual int	momIndex () const override
	get momentum index in statevector

virtual bool	hasEnergy () const override
	return of this constraint/particle has an energy component

virtual bool	hasPosition () const override
	return true FIXME

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

virtual ErrCode	initCovariance (FitParams &) const
	init covariance matrix

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

virtual std::string	parname (int index) const
	get name of parameter i

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

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

virtual int	nFinalChargedCandidates () const
	number of charged candidates

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
Eigen::Matrix< double, 7, 1 >	m_params
	column vector to store the measurement

Eigen::Matrix< double, -1, -1, 0, 7, 7 >	m_covariance
	only lower triangle filled!

bool	m_hasEnergy
	flag

bool	m_massconstraint
	flag

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
int	m_index
	index

std::string	m_name
	name

Detailed Description

A class for composite particles, where the daughters must be ignored by the fitter.

Currently used for bremsstrahlung correction and dummy invisibles

Definition at line 17 of file Composite.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.

   {
     bool rc = false ;
     const int pdgcode = std::abs(particle->getPDGCode());
  
     if (pdgcode && !(particle->getMdstArrayIndex())) {
       switch (pdgcode) {
         case 22:  //photon conversion
           rc = false;
           break ;
  
         case -11: //bremsstrahlung
         case 11:
           rc = true ;
           break ;
         default: //everything with boosted flight length less than 1 micrometer
           rc = (pdgcode && particle->getPDGLifetime() < 1e-14);
       }
     }
     return rc ;
   }

◆ 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/Composite.h
analysis/VertexFitting/TreeFitter/src/Composite.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()