VertexFitKFit is a derived class from KFitBase to perform vertex-constraint kinematical fit. More...

#include <VertexFitKFit.h>

Inheritance diagram for VertexFitKFit:

Collaboration diagram for VertexFitKFit:

[legend]

Public Member Functions
	VertexFitKFit (void)
	Construct an object with no argument.

	~VertexFitKFit (void)
	Destruct the object.

enum KFitError::ECode	setInitialVertex (const HepPoint3D &v)
	Set an initial vertex point for the vertex-vertex constraint fit. More...

enum KFitError::ECode	setInitialVertex (const TVector3 &v)
	Set an initial vertex point for the mass-vertex constraint fit. More...

enum KFitError::ECode	setIpProfile (const HepPoint3D &ip, const CLHEP::HepSymMatrix &ipe)
	Set an IP-ellipsoid shape for the vertex constraint fit. More...

enum KFitError::ECode	setIpTubeProfile (const CLHEP::HepLorentzVector &p, const HepPoint3D &x, const CLHEP::HepSymMatrix &e, const double q)
	Set a virtual IP-tube track for the vertex constraint fit. More...

enum KFitError::ECode	setKnownVertex (const bool flag=true)
	Tell the object to perform a fit with vertex position fixed. More...

enum KFitError::ECode	setCorrelationMode (const bool m)
	Tell the object to perform a fit with track correlations. More...

const HepPoint3D	getVertex (const int flag=KFitConst::kAfterFit) const
	Get a vertex position. More...

const CLHEP::HepSymMatrix	getVertexError (void) const
	Get a fitted vertex error matrix. More...

double	getCHIsq (void) const override
	Get a chi-square of the fit. More...

double	getCHIsqVertex (void) const
	Get a chi-square of the fit excluding IP-constraint part. More...

const CLHEP::HepMatrix	getTrackVertexError (const int id) const
	Get a vertex error matrix of the track. More...

double	getTrackCHIsq (const int id) const override
	Get a chi-square of the track. More...

double	getTrackPartCHIsq (void) const
	Get a sum of the chi-square associated to the input tracks. More...

int	getTrackPartNDF (void) const
	Get an NDF relevant to the getTrackPartCHIsq(). More...

enum KFitError::ECode	doFit (void)
	Perform a vertex-constraint fit. More...

enum KFitError::ECode	updateMother (Particle *mother)
	Update mother particle. More...

enum KFitError::ECode	addTrack (const KFitTrack &kp)
	Add a track to the fitter object. More...

enum KFitError::ECode	addTrack (const CLHEP::HepLorentzVector &p, const HepPoint3D &x, const CLHEP::HepSymMatrix &e, const double q)
	Add a track to the fitter object with specifying its momentum, position, error matrix, and charge. More...

enum KFitError::ECode	addParticle (const Particle *particle)
	Add a particle to the fitter. More...

virtual enum KFitError::ECode	setCorrelation (const CLHEP::HepMatrix &c)
	Set a correlation matrix. More...

virtual enum KFitError::ECode	setZeroCorrelation (void)
	Indicate no correlation between tracks. More...

enum KFitError::ECode	setMagneticField (const double mf)
	Change a magnetic field from the default value KFitConst::kDefaultMagneticField. More...

enum KFitError::ECode	getErrorCode (void) const
	Get a code of the last error. More...

int	getTrackCount (void) const
	Get the number of added tracks. More...

virtual int	getNDF (void) const
	Get an NDF of the fit. More...

double	getMagneticField (void) const
	Get a magnetic field. More...

const CLHEP::HepLorentzVector	getTrackMomentum (const int id) const
	Get a Lorentz vector of the track. More...

const HepPoint3D	getTrackPosition (const int id) const
	Get a position of the track. More...

const CLHEP::HepSymMatrix	getTrackError (const int id) const
	Get an error matrix of the track. More...

const KFitTrack	getTrack (const int id) const
	Get a specified track object. More...

virtual const CLHEP::HepMatrix	getCorrelation (const int id1, const int id2, const int flag=KFitConst::kAfterFit) const
	Get a correlation matrix between two tracks. More...

bool	isFitted (void) const
	Return false if fit is not performed yet or performed fit is failed; otherwise true. More...

Protected Member Functions
const CLHEP::HepSymMatrix	makeError1 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e) const
	Rebuild an error matrix from a Lorentz vector and an error matrix. More...

const CLHEP::HepMatrix	makeError1 (const CLHEP::HepLorentzVector &p1, const CLHEP::HepLorentzVector &p2, const CLHEP::HepMatrix &e) const
	Rebuild an error matrix from a pair of Lorentz vectors and an error matrix. More...

const CLHEP::HepMatrix	makeError2 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e) const
	Rebuild an error matrix from a Lorentz vector and an error matrix. More...

const CLHEP::HepSymMatrix	makeError3 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e, const bool is_fix_mass) const
	Rebuild an error matrix from a Lorentz vector and an error matrix. More...

const CLHEP::HepMatrix	makeError3 (const CLHEP::HepLorentzVector &p1, const CLHEP::HepLorentzVector &p2, const CLHEP::HepMatrix &e, const bool is_fix_mass1, const bool is_fix_mass2) const
	Rebuild an error matrix from a pair of Lorentz vectors and an error matrix. More...

const CLHEP::HepMatrix	makeError4 (const CLHEP::HepLorentzVector &p, const CLHEP::HepMatrix &e) const
	Rebuild an error matrix from a Lorentz vector and an error matrix. More...

virtual enum KFitError::ECode	prepareCorrelation (void)
	Build a grand correlation matrix from input-track properties. More...

enum KFitError::ECode	doFit1 (void)
	Perform a fit (used in MassFitKFit::doFit()). More...

enum KFitError::ECode	doFit2 (void)
	Perform a fit (used in VertexFitKFit::doFit() and MassVertexFitKFit::doFit()). More...

bool	isTrackIDInRange (const int id) const
	Check if the id is in the range. More...

bool	isNonZeroEnergy (const CLHEP::HepLorentzVector &p) const
	Check if the energy is non-zero. More...

Protected Attributes
enum KFitError::ECode	m_ErrorCode
	Error code.

bool	m_FlagFitted
	Flag to indicate if the fit is performed and succeeded.

std::vector< KFitTrack >	m_Tracks
	Container of input tracks.

std::vector< CLHEP::HepMatrix >	m_BeforeCorrelation
	Container of input correlation matrices.

CLHEP::HepSymMatrix	m_V_al_0
	See J.Tanaka Ph.D (2001) p137 for definition.

CLHEP::HepMatrix	m_al_0
	See J.Tanaka Ph.D (2001) p136 for definition.

CLHEP::HepMatrix	m_al_1
	See J.Tanaka Ph.D (2001) p136 for definition.

CLHEP::HepMatrix	m_al_a
	See J.Tanaka Ph.D (2001) p137 for definition.

CLHEP::HepMatrix	m_property
	Container of charges and masses.

CLHEP::HepMatrix	m_D
	See J.Tanaka Ph.D (2001) p137 for definition.

CLHEP::HepMatrix	m_d
	See J.Tanaka Ph.D (2001) p137 for definition.

CLHEP::HepMatrix	m_V_D
	See J.Tanaka Ph.D (2001) p138 for definition.

CLHEP::HepMatrix	m_V_al_1
	See J.Tanaka Ph.D (2001) p138 for definition.

CLHEP::HepMatrix	m_lam
	See J.Tanaka Ph.D (2001) p137 for definition.

CLHEP::HepMatrix	m_E
	See J.Tanaka Ph.D (2001) p137 for definition.

CLHEP::HepMatrix	m_V_E
	See J.Tanaka Ph.D (2001) p138 for definition.

CLHEP::HepMatrix	m_lam0
	See J.Tanaka Ph.D (2001) p138 for definition.

CLHEP::HepMatrix	m_v
	See J.Tanaka Ph.D (2001) p137 for definition.

CLHEP::HepMatrix	m_v_a
	See J.Tanaka Ph.D (2001) p137 for definition.

CLHEP::HepMatrix	m_V_Dt
	See J.Tanaka Ph.D (2001) p138 for definition.

CLHEP::HepMatrix	m_Cov_v_al_1
	See J.Tanaka Ph.D (2001) p137 for definition.

int	m_NDF
	NDF of the fit.

double	m_CHIsq
	chi-square of the fit.

int	m_TrackCount
	Number of tracks.

int	m_NecessaryTrackCount
	Number needed tracks to perform fit.

bool	m_FlagCorrelation
	Flag whether a correlation among tracks exists.

bool	m_FlagOverIteration
	Flag whether the iteration count exceeds the limit.

double	m_MagneticField
	Magnetic field.

Private Member Functions
enum KFitError::ECode	doFit3 (void)
	Perform a standard vertex-constraint fit including IP-tube constraint. More...

enum KFitError::ECode	doFit4 (void)
	Perform a IP-ellipsoid and vertex-constraint fit. More...

enum KFitError::ECode	doFit5 (void)
	Perform a fixed-vertex-position fit mainly for slow pion. More...

enum KFitError::ECode	prepareInputMatrix (void) override
	Build grand matrices for minimum search from input-track properties. More...

enum KFitError::ECode	prepareInputSubMatrix (void) override
	Build sub-matrices for minimum search from input-track properties. More...

enum KFitError::ECode	prepareOutputMatrix (void) override
	Build an output error matrix. More...

enum KFitError::ECode	makeCoreMatrix (void) override
	Build matrices using the kinematical constraint. More...

enum KFitError::ECode	calculateNDF (void) override
	Calculate an NDF of the fit. More...

enum KFitError::ECode	appendTube (void)
	Add the virtual tube track to m_Tracks just before the internal minimization call. More...

enum KFitError::ECode	deleteTube (void)
	Delete the virtual tube track to m_Tracks just after the internal minimization call. More...

Private Attributes
bool	m_CorrelationMode
	Flag controlled by setCorrelationMode().

double	m_EachCHIsq [KFitConst::kMaxTrackCount2]
	Container of chi-square's of the input tracks.

double	m_CHIsqVertex
	chi-square of the fit excluding IP-constraint part.

HepPoint3D	m_BeforeVertex
	Vertex position before the fit.

HepPoint3D	m_AfterVertex
	Vertex position after the fit.

CLHEP::HepSymMatrix	m_AfterVertexError
	Vertex error matrix after the fit.

std::vector< CLHEP::HepMatrix >	m_AfterTrackVertexError
	Array of vertex error matrices after the fit.

bool	m_FlagBeam
	Flag if to perform IP-ellipsoid constraint fit.

CLHEP::HepSymMatrix	m_BeamError
	Error matrix modeling the IP ellipsoid.

bool	m_FlagKnownVertex
	Flag controlled by setKnownVertex().

bool	m_FlagTube
	Flag if to perform IP-tube constraint fit.

int	m_iTrackTube
	ID of the virtual tube track in the m_Tracks.

KFitTrack	m_TubeTrack
	Entity of the virtual IP-tube track.

Detailed Description

VertexFitKFit is a derived class from KFitBase to perform vertex-constraint kinematical fit.

Definition at line 33 of file VertexFitKFit.h.

Member Function Documentation

◆ addParticle()

enum KFitError::ECode addParticle ( const Particle * particle )

inherited

Add a particle to the fitter.

The function gets track parameters from the Particle dataobject and calls addTrack().

Parameters

[in] particle Particle.

Returns: error code (zero if success)

Definition at line 60 of file KFitBase.cc.

◆ addTrack() [1/2]

enum KFitError::ECode addTrack	(	const CLHEP::HepLorentzVector &	p,
		const HepPoint3D &	x,
		const CLHEP::HepSymMatrix &	e,
		const double	q
	)

inherited

Add a track to the fitter object with specifying its momentum, position, error matrix, and charge.

This function internally calls addTrack(const KFitTrack &kp).

Parameters

p	Lorentz vector of the track
x	position of the track
e	(7x7) error matrix of the track
q	charge of the track

Returns: error code (zero if success)

◆ addTrack() [2/2]

enum KFitError::ECode addTrack ( const KFitTrack & kp )

inherited

Add a track to the fitter object.

Parameters

kp	object of the track

Returns: error code (zero if success)

Definition at line 39 of file KFitBase.cc.

◆ appendTube()

enum KFitError::ECode appendTube ( void )

private

Add the virtual tube track to m_Tracks just before the internal minimization call.

Returns: error code (zero if success)

Definition at line 870 of file VertexFitKFit.cc.

                           {
   if (!m_FlagTube) return m_ErrorCode = KFitError::kNoError;
  
   if (m_iTrackTube != -1)
   {
     char buf[1024];
     sprintf(buf, "%s:%s(): internal error; duplicated appendTube() call?", __FILE__, __func__);
     B2FATAL(buf);
   }
  
   m_Tracks.push_back(m_TubeTrack);
   m_TrackCount = m_Tracks.size();
   m_iTrackTube = m_TrackCount;
  
   return m_ErrorCode = KFitError::kNoError;
 }

◆ calculateNDF()

enum KFitError::ECode calculateNDF ( void )

overrideprivatevirtual

Calculate an NDF of the fit.

Returns: error code (zero if success)

Implements KFitBase.

Definition at line 859 of file VertexFitKFit.cc.

◆ deleteTube()

enum KFitError::ECode deleteTube ( void )

private

Delete the virtual tube track to m_Tracks just after the internal minimization call.

Returns: error code (zero if success)

Definition at line 889 of file VertexFitKFit.cc.

◆ doFit()

enum KFitError::ECode doFit ( void )

Perform a vertex-constraint fit.

Returns: error code (zero if success)

Definition at line 216 of file VertexFitKFit.cc.

◆ doFit1()

enum KFitError::ECode doFit1 ( void )

protectedinherited

Perform a fit (used in MassFitKFit::doFit()).

Returns: error code (zero if success)

Definition at line 502 of file KFitBase.cc.

◆ doFit2()

enum KFitError::ECode doFit2 ( void )

protectedinherited

Perform a fit (used in VertexFitKFit::doFit() and MassVertexFitKFit::doFit()).

Returns: error code (zero if success)

Definition at line 578 of file KFitBase.cc.

◆ doFit3()

enum KFitError::ECode doFit3 ( void )

private

Perform a standard vertex-constraint fit including IP-tube constraint.

Returns: error code (zero if success)

Definition at line 236 of file VertexFitKFit.cc.

◆ doFit4()

enum KFitError::ECode doFit4 ( void )

private

Perform a IP-ellipsoid and vertex-constraint fit.

Returns: error code (zero if success)

Definition at line 403 of file VertexFitKFit.cc.

◆ doFit5()

enum KFitError::ECode doFit5 ( void )

private

Perform a fixed-vertex-position fit mainly for slow pion.

Returns: error code (zero if success)

Definition at line 527 of file VertexFitKFit.cc.

◆ getCHIsq()

double getCHIsq ( void ) const

overridevirtual

Get a chi-square of the fit.

Returns: chi-square of the fit

Reimplemented from KFitBase.

Definition at line 140 of file VertexFitKFit.cc.

◆ getCHIsqVertex()

double getCHIsqVertex ( void ) const

Get a chi-square of the fit excluding IP-constraint part.

Returns: chi-square of the fit excluding IP-constraint part.

Definition at line 147 of file VertexFitKFit.cc.

◆ getCorrelation()

const HepMatrix getCorrelation	(	const int	id1,
		const int	id2,
		const int	flag = `KFitConst::kAfterFit`
	)		const

virtualinherited

Get a correlation matrix between two tracks.

Parameters

id1	first track id
id2	second track id
flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Returns: (7x7) correlation matrix

Reimplemented in FourCFitKFit, MassFitKFit, MassPointingVertexFitKFit, and MassVertexFitKFit.

Definition at line 184 of file KFitBase.cc.

◆ getErrorCode()

enum KFitError::ECode getErrorCode ( void ) const

inherited

Get a code of the last error.

Returns: the last error code

Definition at line 102 of file KFitBase.cc.

◆ getMagneticField()

double getMagneticField ( void ) const

inherited

Get a magnetic field.

Returns: magnetic field

Definition at line 129 of file KFitBase.cc.

◆ getNDF()

int getNDF ( void ) const

virtualinherited

Get an NDF of the fit.

Returns: NDF of the fit

Definition at line 115 of file KFitBase.cc.

◆ getTrack()

const KFitTrack getTrack ( const int id ) const

inherited

Get a specified track object.

Parameters

id track id

Returns: specified track object

Definition at line 176 of file KFitBase.cc.

◆ getTrackCHIsq()

double getTrackCHIsq ( const int id ) const

overridevirtual

Get a chi-square of the track.

Parameters

id track id

Returns: chi-square of the track

Reimplemented from KFitBase.

Definition at line 163 of file VertexFitKFit.cc.

◆ getTrackCount()

int getTrackCount ( void ) const

inherited

Get the number of added tracks.

Returns: the number of added tracks

Definition at line 108 of file KFitBase.cc.

◆ getTrackError()

const HepSymMatrix getTrackError ( const int id ) const

inherited

Get an error matrix of the track.

Parameters

id track id

Returns: error matrix of the track

Definition at line 169 of file KFitBase.cc.

◆ getTrackMomentum()

const HepLorentzVector getTrackMomentum ( const int id ) const

inherited

Get a Lorentz vector of the track.

Parameters

id track id

Returns: Lorentz vector of the track

Definition at line 155 of file KFitBase.cc.

◆ getTrackPartCHIsq()

double getTrackPartCHIsq ( void ) const

Get a sum of the chi-square associated to the input tracks.

The return value should be the same as the one from getCHIsqVertex().

Returns: sum of the chi-square associated to the input tracks

Definition at line 176 of file VertexFitKFit.cc.

◆ getTrackPartNDF()

int getTrackPartNDF ( void ) const

Get an NDF relevant to the getTrackPartCHIsq().

Returns: NDF relevant to the getTrackPartCHIsq()

Definition at line 199 of file VertexFitKFit.cc.

◆ getTrackPosition()

const HepPoint3D getTrackPosition ( const int id ) const

inherited

Get a position of the track.

Parameters

id track id

Returns: position of the track

Definition at line 162 of file KFitBase.cc.

◆ getTrackVertexError()

const HepMatrix getTrackVertexError ( const int id ) const

Get a vertex error matrix of the track.

Parameters

id	track id
flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Returns: vertex error matrix

Definition at line 155 of file VertexFitKFit.cc.

◆ getVertex()

const HepPoint3D getVertex ( const int flag = KFitConst::kAfterFit ) const

Get a vertex position.

Parameters

flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Returns: vertex position

Definition at line 114 of file VertexFitKFit.cc.

◆ getVertexError()

const HepSymMatrix getVertexError ( void ) const

Get a fitted vertex error matrix.

Returns: vertex error matrix

Definition at line 133 of file VertexFitKFit.cc.

◆ isFitted()

bool isFitted ( void ) const

inherited

Return false if fit is not performed yet or performed fit is failed; otherwise true.

Returns: see description

Definition at line 728 of file KFitBase.cc.

◆ isNonZeroEnergy()

bool isNonZeroEnergy ( const CLHEP::HepLorentzVector & p ) const

protectedinherited

Check if the energy is non-zero.

Parameters

p	Lorentz vector

Returns: true for non-zero energy, false for otherwise

Definition at line 750 of file KFitBase.cc.

◆ isTrackIDInRange()

bool isTrackIDInRange ( const int id ) const

protectedinherited

Check if the id is in the range.

Parameters

id track id

Returns: true if the id is in the range, false otherwise

Definition at line 739 of file KFitBase.cc.

◆ makeCoreMatrix()

enum KFitError::ECode makeCoreMatrix ( void )

overrideprivatevirtual

Build matrices using the kinematical constraint.

Returns: error code (zero if success)

Implements KFitBase.

Definition at line 764 of file VertexFitKFit.cc.

◆ makeError1() [1/2]

const CLHEP::HepSymMatrix makeError1	(	const CLHEP::HepLorentzVector &	p,
		const CLHEP::HepMatrix &	e
	)		const

protectedinherited

Rebuild an error matrix from a Lorentz vector and an error matrix.

Parameters

p	Lorentz vector
e	(6x6) error matrix

Returns: (7x7) error matrix

◆ makeError1() [2/2]

const CLHEP::HepMatrix makeError1	(	const CLHEP::HepLorentzVector &	p1,
		const CLHEP::HepLorentzVector &	p2,
		const CLHEP::HepMatrix &	e
	)		const

protectedinherited

Rebuild an error matrix from a pair of Lorentz vectors and an error matrix.

Parameters

p1	first Lorentz vector
p2	second Lorentz vector
e	(6x6) error matrix

Returns: (7x7) error matrix

◆ makeError2()

const HepMatrix makeError2	(	const CLHEP::HepLorentzVector &	p,
		const CLHEP::HepMatrix &	e
	)		const

protectedinherited

Rebuild an error matrix from a Lorentz vector and an error matrix.

Parameters

p	Lorentz vector
e	(3x6) error matrix

Returns: (3x7) error matrix

Definition at line 297 of file KFitBase.cc.

◆ makeError3() [1/2]

const CLHEP::HepSymMatrix makeError3	(	const CLHEP::HepLorentzVector &	p,
		const CLHEP::HepMatrix &	e,
		const bool	is_fix_mass
	)		const

protectedinherited

Rebuild an error matrix from a Lorentz vector and an error matrix.

Parameters

p	Lorentz vector
e	(7x7) error matrix
is_fix_mass	true to recalculate energy term from other parameters, false to do nothing

Returns: (7x7) error matrix

◆ makeError3() [2/2]

const CLHEP::HepMatrix makeError3	(	const CLHEP::HepLorentzVector &	p1,
		const CLHEP::HepLorentzVector &	p2,
		const CLHEP::HepMatrix &	e,
		const bool	is_fix_mass1,
		const bool	is_fix_mass2
	)		const

protectedinherited

Rebuild an error matrix from a pair of Lorentz vectors and an error matrix.

Parameters

p1	first Lorentz vector
p2	second Lorentz vector
e	(7x7) error matrix
is_fix_mass	true to recalculate energy term from other parameters, false to do nothing

Returns: (7x7) error matrix

◆ makeError4()

const HepMatrix makeError4	(	const CLHEP::HepLorentzVector &	p,
		const CLHEP::HepMatrix &	e
	)		const

protectedinherited

Rebuild an error matrix from a Lorentz vector and an error matrix.

Parameters

p	Lorentz vector
e	(3x7) error matrix

Returns: (7x7) error matrix

Definition at line 439 of file KFitBase.cc.

◆ prepareCorrelation()

enum KFitError::ECode prepareCorrelation ( void )

protectedvirtualinherited

Build a grand correlation matrix from input-track properties.

Returns: error code (zero if success)

Reimplemented in FourCFitKFit, MassFitKFit, MassPointingVertexFitKFit, and MassVertexFitKFit.

Definition at line 459 of file KFitBase.cc.

◆ prepareInputMatrix()

enum KFitError::ECode prepareInputMatrix ( void )

overrideprivatevirtual

Build grand matrices for minimum search from input-track properties.

Returns: error code (zero if success)

Implements KFitBase.

Definition at line 619 of file VertexFitKFit.cc.

◆ prepareInputSubMatrix()

enum KFitError::ECode prepareInputSubMatrix ( void )

overrideprivatevirtual

Build sub-matrices for minimum search from input-track properties.

Returns: error code (zero if success)

Implements KFitBase.

Definition at line 698 of file VertexFitKFit.cc.

◆ prepareOutputMatrix()

enum KFitError::ECode prepareOutputMatrix ( void )

overrideprivatevirtual

Build an output error matrix.

Returns: error code (zero if success)

Implements KFitBase.

Definition at line 709 of file VertexFitKFit.cc.

◆ setCorrelation()

enum KFitError::ECode setCorrelation ( const CLHEP::HepMatrix & c )

virtualinherited

Set a correlation matrix.

Not intended for end user's use.

Parameters

c	(7x7) correlation matrix

Returns: error code (zero if success)

Reimplemented in MassPointingVertexFitKFit, MassFitKFit, MassVertexFitKFit, and FourCFitKFit.

Definition at line 71 of file KFitBase.cc.

◆ setCorrelationMode()

enum KFitError::ECode setCorrelationMode ( const bool m )

Tell the object to perform a fit with track correlations.

Parameters

m	true for with correlation, false for otherwise

Returns: error code (zero if success)

Definition at line 106 of file VertexFitKFit.cc.

◆ setInitialVertex() [1/2]

enum KFitError::ECode setInitialVertex ( const HepPoint3D & v )

Set an initial vertex point for the vertex-vertex constraint fit.

Parameters

v	initial vertex point

Returns: error code (zero if success)

Definition at line 51 of file VertexFitKFit.cc.

◆ setInitialVertex() [2/2]

enum KFitError::ECode setInitialVertex ( const TVector3 & v )

Set an initial vertex point for the mass-vertex constraint fit.

Parameters

v	initial vertex point

Returns: error code (zero if success)

Definition at line 57 of file VertexFitKFit.cc.

◆ setIpProfile()

enum KFitError::ECode setIpProfile	(	const HepPoint3D &	ip,
		const CLHEP::HepSymMatrix &	ipe
	)

Set an IP-ellipsoid shape for the vertex constraint fit.

Parameters

ip	IP position
ipe	error matrix of the IP

Returns: error code (zero if success)

Definition at line 65 of file VertexFitKFit.cc.

◆ setIpTubeProfile()

enum KFitError::ECode setIpTubeProfile	(	const CLHEP::HepLorentzVector &	p,
		const HepPoint3D &	x,
		const CLHEP::HepSymMatrix &	e,
		const double	q
	)

Set a virtual IP-tube track for the vertex constraint fit.

Parameters

p	Lorentz vector of the virtual IP-tube track
x	IP position
e	error matrix of IP-tube track and IP position
q	charge of the virtual IP-tube track

Returns: error code (zero if success)

Definition at line 82 of file VertexFitKFit.cc.

◆ setKnownVertex()

enum KFitError::ECode setKnownVertex ( const bool flag = true )

Tell the object to perform a fit with vertex position fixed.

Parameters

flag	true for fixed vertex, false for otherwise

Returns: error code (zero if success)

Definition at line 98 of file VertexFitKFit.cc.

◆ setMagneticField()

enum KFitError::ECode setMagneticField ( const double mf )

inherited

Change a magnetic field from the default value KFitConst::kDefaultMagneticField.

Parameters

mf	magnetic field to set

Returns: error code (zero if success)

Definition at line 94 of file KFitBase.cc.

◆ setZeroCorrelation()

enum KFitError::ECode setZeroCorrelation ( void )

virtualinherited

Indicate no correlation between tracks.

Not intended for end user's use.

Returns: error code (zero if success)

Reimplemented in MassPointingVertexFitKFit, MassFitKFit, MassVertexFitKFit, and FourCFitKFit.

Definition at line 86 of file KFitBase.cc.

◆ updateMother()

enum KFitError::ECode updateMother ( Particle * mother )

Update mother particle.

Parameters

[in] mother Mother particle.

Definition at line 906 of file VertexFitKFit.cc.

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

analysis/VertexFitting/KFit/include/VertexFitKFit.h
analysis/VertexFitting/KFit/src/VertexFitKFit.cc

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Detailed Description

Member Function Documentation

◆ addParticle()

◆ addTrack() [1/2]

◆ addTrack() [2/2]

◆ appendTube()

◆ calculateNDF()

◆ deleteTube()

◆ doFit()

◆ doFit1()

◆ doFit2()

◆ doFit3()

◆ doFit4()

◆ doFit5()

◆ getCHIsq()

◆ getCHIsqVertex()

◆ getCorrelation()

◆ getErrorCode()

◆ getMagneticField()

◆ getNDF()

◆ getTrack()

◆ getTrackCHIsq()

◆ getTrackCount()

◆ getTrackError()

◆ getTrackMomentum()

◆ getTrackPartCHIsq()

◆ getTrackPartNDF()

◆ getTrackPosition()

◆ getTrackVertexError()

◆ getVertex()

◆ getVertexError()

◆ isFitted()

◆ isNonZeroEnergy()

◆ isTrackIDInRange()

◆ makeCoreMatrix()

◆ makeError1() [1/2]

◆ makeError1() [2/2]

◆ makeError2()

◆ makeError3() [1/2]

◆ makeError3() [2/2]

◆ makeError4()

◆ prepareCorrelation()

◆ prepareInputMatrix()

◆ prepareInputSubMatrix()

◆ prepareOutputMatrix()

◆ setCorrelation()

◆ setCorrelationMode()

◆ setInitialVertex() [1/2]

◆ setInitialVertex() [2/2]

◆ setIpProfile()

◆ setIpTubeProfile()

◆ setKnownVertex()

◆ setMagneticField()

◆ setZeroCorrelation()

◆ updateMother()