DecayTreeFitter::Fitter Class Reference

#include <Fitter.h>

Inheritance diagram for DecayTreeFitter::Fitter:

Public Types
enum	FitStatus {   UnFitted = -1, Success = 0, Failed, BadInput,   NonConverged }

Public Member Functions
	Fitter (RhoCandidate *bc, RecoTrackStateProvider *extrapolator, int verbosity=0)
	constructor from the particle (decay head) More...
	Fitter (RhoCandidate *bc, const RhoVector3Err &pv, RecoTrackStateProvider *extrapolator=nullptr, int verbosity=0)
	constructor from the particle (decay head) and primary vertex More...
	Fitter (RhoCandidate *bc, const RhoLorentzVectorErr &lv, RecoTrackStateProvider *extrapolator, int verbosity=0)
	constructor from the particle (decay head) and pbeam More...
	Fitter (RhoCandidate *bc, const RhoLorentzVectorErr &lv, const RhoVector3Err &pv, RecoTrackStateProvider *extrapolator=nullptr, int verbosity=0)
	constructor from the particle (decay head), pbeam and primary vertex More...
virtual	~Fitter ()
	destructor More...
void	setMassConstraint (RhoCandidate *cand, bool add=true)
	Add or remove a mass constraint. More...
void	setMassConstraint (RhoCandidate *cand, double mass)
	Add a constraint to a mass different from the property table mass. More...
Bool_t	Fit (int maxNumberOfIterations=10, double deltaChisquareConverged=0.01)
	Add or remove a mass constraintfor a certain ParticleID. More...
Bool_t	FitAll (int maxit=10, double dchiq=0.01)
std::string	print () const
	Print the result of the fit. More...
std::ostream &	fillStream (std::ostream &s) const
	Print the result of the fit. More...
RhoCandidate *	particle () const
	The top level particle that is fitted. More...
RhoCandidate *	fitParams (RhoCandidate *p=0) const
double	chiSquare () const
	Total chisquare. More...
int	nDof () const
	Total number of DOFs. More...
FitStatus	status () const
	Status of fit. More...
int	nIter () const
	Number of iterations used by vertex fit. More...
ChiSquare	chiSquare (RhoCandidate *p) const
	get the chisquare of everything 'downstream' of a particle More...
RhoDoubleErr	decayLengthSum (RhoCandidate *, RhoCandidate *) const
bool	updateCand (RhoCandidate *cand) const
	update a particlular candidate in the tree More...
bool	updateTree (RhoCandidate *cand) const
	update a particlular candidate in the tree More...
int	errCode ()
	error code More...
void	setVerbose (int i)
	set the verbosity level (for debugging only) More...
void	SetToleranceZ (double z)
DecayChain *	GetDecayChainDirty ()
RecoTrackStateProvider *	extrapolator ()
	get the extrapolator More...
void	setStateProvider (RecoTrackStateProvider *extrapolator)
	set the track extrapolator More...
Public Member Functions inherited from RhoFitterBase
	RhoFitterBase ()
	RhoFitterBase (RhoCandidate *decayTree)
	RhoFitterBase (const RhoFitterBase &)
	~RhoFitterBase ()
Bool_t	Fit ()
Bool_t	FitAll ()
double	Chi2Contribution (const RhoCandidate *)
double	GetChi2 () const
int	GetNdf () const
double	GetProb () const
void	SetVerbose (Bool_t v=kTRUE)

Protected Member Functions
std::string	name (RhoCandidate *cand) const
	Name of a particle in the decay tree. More...
RhoDoubleErr	decayLengthSum (const ParticleBase &, const ParticleBase &) const
DecayChain *	decaychain ()
FitParams *	fitparams ()
const DecayChain *	decaychain () const
const FitParams *	fitparams () const
double	globalChiSquare () const
double	add (RhoCandidate *cand)
double	remove (RhoCandidate *cand)
void	updateIndex ()
void	fit (int maxNumberOfIterations=10, double deltaChisquareConverged=0.01)
	Fit the decay tree. More...
void	fitOneStep ()
	Fit just one step. More...
RhoCandidate *	fittedCand (RhoCandidate *cand, RhoCandidate *headoftree) const
void	updateCand (const ParticleBase &pb, RhoCandidate *cand) const
Protected Member Functions inherited from RhoFitterBase
RhoCandidate &	HeadOfTree () const
virtual Bool_t	FitNode (RhoCandidate *b)
RhoCandidate *	CopyCand (RhoCandidate *)
	uppermost particle composite in tree More...
RhoCandidate *	CopyTree (RhoCandidate *)
void	InsertChi2 (const RhoCandidate *bc, const double chi2)
void	SetDaugthersFromComposite (RhoCandidate *cand)
void	FindAndAddFinalStateDaughters (RhoCandidate *cand)
void	SetFourMomentumByDaughters (RhoCandidate *composite)
void	SetDecayVertex (RhoCandidate *composite, const TVector3 &vtx, const TMatrixD &CovVV)

Protected Attributes
RecoTrackStateProvider *	m_extrapolator
	track extrapolator (if needed) More...
Protected Attributes inherited from RhoFitterBase
Bool_t	fVerbose
RhoCandidate *	fHeadOfTree
std::vector< RhoCandidate * >	fDaughters
double	fChiSquare
int	fNDegreesOfFreedom

Detailed Description

``Decay-Tree-Fitter''`

Author

Wouter Hulsbergen Woute.nosp@m.r.Hu.nosp@m.lsber.nosp@m.gen@.nosp@m.nikhe.nosp@m.f.nl

Definition at line 54 of file Fitter.h.

Member Enumeration Documentation

FitStatus

enum DecayTreeFitter::Fitter::FitStatus

Enumerator
UnFitted
Success
Failed
BadInput
NonConverged

Definition at line 57 of file Fitter.h.

{ UnFitted = -1, Success = 0, Failed, BadInput, NonConverged };

Constructor & Destructor Documentation

Fitter() [1/4]

DecayTreeFitter::Fitter::Fitter	(	RhoCandidate *	bc,
		RecoTrackStateProvider *	extrapolator,
		int	verbosity = 0
	)

constructor from the particle (decay head)

Fitter() [2/4]

DecayTreeFitter::Fitter::Fitter	(	RhoCandidate *	bc,
		const RhoVector3Err &	pv,
		RecoTrackStateProvider *	extrapolator = nullptr,
		int	verbosity = 0
	)

constructor from the particle (decay head) and primary vertex

Fitter() [3/4]

DecayTreeFitter::Fitter::Fitter	(	RhoCandidate *	bc,
		const RhoLorentzVectorErr &	lv,
		RecoTrackStateProvider *	extrapolator,
		int	verbosity = 0
	)

constructor from the particle (decay head) and pbeam

Fitter() [4/4]

DecayTreeFitter::Fitter::Fitter	(	RhoCandidate *	bc,
		const RhoLorentzVectorErr &	lv,
		const RhoVector3Err &	pv,
		RecoTrackStateProvider *	extrapolator = nullptr,
		int	verbosity = 0
	)

constructor from the particle (decay head), pbeam and primary vertex

~Fitter()

virtual DecayTreeFitter::Fitter::~Fitter ( )

virtual

destructor

Member Function Documentation

add()

double DecayTreeFitter::Fitter::add ( RhoCandidate *  cand )

protected

Referenced by fitparams().

chiSquare() [1/2]

double DecayTreeFitter::Fitter::chiSquare ( ) const

inline

Total chisquare.

Definition at line 104 of file Fitter.h.

References RhoFitterBase::fChiSquare, and nDof().

Referenced by nIter().

{ return fChiSquare; }

chiSquare() [2/2]

ChiSquare DecayTreeFitter::Fitter::chiSquare

(

RhoCandidate *

p

)

const

get the chisquare of everything 'downstream' of a particle

decaychain() [1/2]

DecayChain* DecayTreeFitter::Fitter::decaychain ( )

inlineprotected

Definition at line 167 of file Fitter.h.

{ return m_decaychain; }

decaychain() [2/2]

const DecayChain* DecayTreeFitter::Fitter::decaychain ( ) const

inlineprotected

Definition at line 169 of file Fitter.h.

{ return m_decaychain; }

decayLengthSum() [1/2]

RhoDoubleErr DecayTreeFitter::Fitter::decayLengthSum	(	RhoCandidate *	,
		RhoCandidate *
	)		const

Compute the decay length sum of two particles in the decay tree (useful for e.g. B->DD)

Referenced by extrapolator(), and nIter().

decayLengthSum() [2/2]

RhoDoubleErr DecayTreeFitter::Fitter::decayLengthSum ( const ParticleBase &  , const ParticleBase &    ) const

protected

errCode()

int DecayTreeFitter::Fitter::errCode ( )

inline

error code

Definition at line 137 of file Fitter.h.

References i, and setVerbose().

{ return m_errCode; }

extrapolator()

RecoTrackStateProvider* DecayTreeFitter::Fitter::extrapolator ( )

inline

get the extrapolator

Definition at line 153 of file Fitter.h.

References decayLengthSum(), m_extrapolator, name(), and setStateProvider().

{ return m_extrapolator; }

fillStream()

std::ostream& DecayTreeFitter::Fitter::fillStream

(

std::ostream &

s

)

const

Print the result of the fit.

Referenced by FitAll().

Fit()

Bool_t DecayTreeFitter::Fitter::Fit ( int  maxNumberOfIterations = 10, double  deltaChisquareConverged = 0.01  )

inline

Add or remove a mass constraintfor a certain ParticleID.

Add a constraint to a mass different from the property table mass Fit the decay tree

Definition at line 83 of file Fitter.h.

References fit(), and updateTree().

  {
    fit(maxNumberOfIterations, deltaChisquareConverged);
    bool check = updateTree(m_particle);
    check = check && (m_status == 0);
    return check;
  };

fit()

void DecayTreeFitter::Fitter::fit ( int  maxNumberOfIterations = 10, double  deltaChisquareConverged = 0.01  )

protected

Fit the decay tree.

Referenced by Fit(), and fitparams().

FitAll()

Bool_t DecayTreeFitter::Fitter::FitAll ( int  maxit = 10, double  dchiq = 0.01  )

inline

Definition at line 90 of file Fitter.h.

References fillStream(), RhoFitterBase::Fit(), and print().

{ return Fit(maxit, dchiq); };

fitOneStep()

void DecayTreeFitter::Fitter::fitOneStep ( )

protected

Fit just one step.

Referenced by fitparams().

fitParams()

RhoCandidate* DecayTreeFitter::Fitter::fitParams ( RhoCandidate *  p = 0 ) const

inline

Currently the only accessor to the actual fitted data

Parameters

p	(INPUT) the particle the fitted parameters ( 0 for invaild parameters/fits)

Definition at line 101 of file Fitter.h.

References RhoCandidate::GetFit().

{ return p->GetFit(); };

fitparams() [1/2]

FitParams* DecayTreeFitter::Fitter::fitparams ( )

inlineprotected

Definition at line 168 of file Fitter.h.

{ return m_fitparams; }

fitparams() [2/2]

const FitParams* DecayTreeFitter::Fitter::fitparams ( ) const

inlineprotected

Definition at line 170 of file Fitter.h.

References add(), fit(), fitOneStep(), fittedCand(), globalChiSquare(), updateCand(), and updateIndex().

{ return m_fitparams; }

fittedCand()

RhoCandidate* DecayTreeFitter::Fitter::fittedCand ( RhoCandidate *  cand, RhoCandidate *  headoftree  ) const

protected

Referenced by fitparams().

GetDecayChainDirty()

DecayChain* DecayTreeFitter::Fitter::GetDecayChainDirty ( )

inline

Definition at line 147 of file Fitter.h.

{ return m_decaychain; }

globalChiSquare()

double DecayTreeFitter::Fitter::globalChiSquare ( ) const

protected

Referenced by fitparams().

name()

std::string DecayTreeFitter::Fitter::name ( RhoCandidate *  cand ) const

protected

Name of a particle in the decay tree.

Referenced by extrapolator().

nDof()

int DecayTreeFitter::Fitter::nDof

(

)

const

Total number of DOFs.

Referenced by chiSquare().

nIter()

int DecayTreeFitter::Fitter::nIter ( ) const

inline

Number of iterations used by vertex fit.

Definition at line 110 of file Fitter.h.

References chiSquare(), decayLengthSum(), updateCand(), and updateTree().

{ return m_niter; }

particle()

RhoCandidate* DecayTreeFitter::Fitter::particle ( ) const

inline

The top level particle that is fitted.

Definition at line 96 of file Fitter.h.

{ return m_particle; }

print()

std::string DecayTreeFitter::Fitter::print

(

)

const

Print the result of the fit.

Referenced by FitAll().

remove()

double DecayTreeFitter::Fitter::remove ( RhoCandidate *  cand )

protected

setMassConstraint() [1/2]

void DecayTreeFitter::Fitter::setMassConstraint	(	RhoCandidate *	cand,
		bool	add = true
	)

Add or remove a mass constraint.

setMassConstraint() [2/2]

void DecayTreeFitter::Fitter::setMassConstraint	(	RhoCandidate *	cand,
		double	mass
	)

Add a constraint to a mass different from the property table mass.

setStateProvider()

void DecayTreeFitter::Fitter::setStateProvider

(

RecoTrackStateProvider *

extrapolator

)

set the track extrapolator

Referenced by extrapolator().

SetToleranceZ()

void DecayTreeFitter::Fitter::SetToleranceZ ( double  z )

inline

Definition at line 140 of file Fitter.h.

References m_extrapolator, and DecayTreeFitter::RecoTrackStateProvider::SetToleranceZ().

  {
    if (m_extrapolator)
      m_extrapolator->SetToleranceZ(z);
  };

setVerbose()

void DecayTreeFitter::Fitter::setVerbose

(

int

i

)

set the verbosity level (for debugging only)

Referenced by errCode().

status()

FitStatus DecayTreeFitter::Fitter::status ( ) const

inline

Status of fit.

Definition at line 108 of file Fitter.h.

{ return m_status; }

updateCand() [1/2]

bool DecayTreeFitter::Fitter::updateCand

(

RhoCandidate *

cand

)

const

update a particlular candidate in the tree

return an updated decay tree. this is not a final solution. will try to move more info to Particle methods to retrieve the result in terms of RhoCandidates (note: mother vertex is not updated, and decay length cannot be stored anywhere. Use fitParams instead methods to retrieve the result in terms of RhoCandidates (note: mother vertex is not updated, and decay length cannot be stored anywhere. Use fitParams instead

Referenced by fitparams(), and nIter().

updateCand() [2/2]

void DecayTreeFitter::Fitter::updateCand ( const ParticleBase &  pb, RhoCandidate *  cand  ) const

protected

updateIndex()

void DecayTreeFitter::Fitter::updateIndex ( )

protected

Referenced by fitparams().

updateTree()

bool DecayTreeFitter::Fitter::updateTree

(

RhoCandidate *

cand

)

const

update a particlular candidate in the tree

Referenced by Fit(), and nIter().

Member Data Documentation

m_extrapolator

RecoTrackStateProvider* DecayTreeFitter::Fitter::m_extrapolator

protected

track extrapolator (if needed)

Definition at line 213 of file Fitter.h.

Referenced by extrapolator(), and SetToleranceZ().

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

• Fitter.h