this class does a lot of stuff: Build decaytree structure allowing to index particles and handle the filtering of constraints across the tree More...

#include <DecayChain.h>

Collaboration diagram for DecayChain:

[legend]

Public Member Functions
	DecayChain ()
	empty constructor

	DecayChain (Belle2::Particle *bc, const ConstraintConfiguration &config, bool forceFitAll=false)
	constructor

	~DecayChain ()
	destructor

ErrCode	initialize (FitParams &par)
	initialize the chain

ErrCode	filter (FitParams &par)
	filter down the chain

ErrCode	filterWithReference (FitParams &par, const FitParams &ref)
	filter with respect to a previous iteration for better stability

int	dim () const
	get dimension

void	initConstraintList ()
	init contraintlist

void	removeConstraintFromList ()
	remove constraints from list

double	chiSquare (const FitParams &par) const
	get the chi2 for the head of the chain

ParticleBase *	mother ()
	get mother

const ParticleBase *	cand ()
	get candidate

const ParticleBase *	mother () const
	get mother

const ParticleBase *	locate (Belle2::Particle *bc) const
	convert Belle2::particle into particle base(fitter base particle)

int	index (Belle2::Particle *bc) const
	get the particle index

int	posIndex (Belle2::Particle *bc) const
	get the vertex index of the particle in state vector

int	momIndex (Belle2::Particle *bc) const
	get momentum index of the particle in the state vector

int	tauIndex (Belle2::Particle *bc) const
	get tau (i.e. More...

int	momIndex () const
	!NOT IMPLEMENTED

Private Types
typedef std::map< Belle2::Particle , const ParticleBase >	ParticleMap
	typedef for a map of a particle to a TreeFitter::ParticleBase

Private Attributes
int	m_dim
	the dimension of constraint

ParticleBase *	m_headOfChain
	head of decay tree

const ParticleBase *	m_cand
	fit candidate (not same to mother in case of bs/be constraint)

ParticleBase::constraintlist	m_constraintlist
	list of constraints

ParticleMap	m_particleMap
	the map from Belle2::Particles to TreeFitter::ParticleBase

const bool	m_isOwner
	internal class member to check if we own the chain

const ConstraintConfiguration	m_config
	config container

Detailed Description

this class does a lot of stuff: Build decaytree structure allowing to index particles and handle the filtering of constraints across the tree

Definition at line 23 of file DecayChain.h.

Member Function Documentation

int tauIndex ( Belle2::Particle * bc ) const

get tau (i.e.

decay lifetime) index of the particle in the state vector

Definition at line 157 of file DecayChain.cc.

   {
     const ParticleBase* base = locate(particle);
     if (base) {
       return base->tauIndex();
     }
     return -1;
   }

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