KFitTrack is a container of the track information (Lorentz vector, position, and error matrix), and a set of macro functions to set/get the contents. More...

#include <KFitTrack.h>

Classes
struct	KFitPXE
	KFitPXE is a container of the track information (Lorentz vector, position, and error matrix). More...

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

	KFitTrack (const KFitTrack &kp)
	Construct the object as a copy constructor.

	KFitTrack (const CLHEP::HepLorentzVector &p, const HepPoint3D &x, const CLHEP::HepSymMatrix &e, const double q, const int flag=KFitConst::kBeforeFit)
	Construct the object with track properties.

	~KFitTrack (void)
	Destruct the object.

KFitTrack &	operator= (const KFitTrack &)
	Operator: assignment operator.

void	setMomentum (const CLHEP::HepLorentzVector &p, const int flag=KFitConst::kBeforeFit)
	Set a Lorentz vector of the track.

void	setPosition (const HepPoint3D &x, const int flag=KFitConst::kBeforeFit)
	Set a position of the track.

void	setError (const CLHEP::HepSymMatrix &e, const int flag=KFitConst::kBeforeFit)
	Set an error matrix of the track.

void	setCharge (const double q)
	Set a charge of the track.

void	setVertex (const HepPoint3D &v)
	Set a vertex position associated to the track.

void	setVertexError (const CLHEP::HepSymMatrix &ve)
	Set a vertex error matrix associated to the track.

const CLHEP::HepLorentzVector	getMomentum (const int flag=KFitConst::kAfterFit) const
	Get a Lorentz vector of the track.

const HepPoint3D	getPosition (const int flag=KFitConst::kAfterFit) const
	Get a position of the track.

const CLHEP::HepSymMatrix	getError (const int flag=KFitConst::kAfterFit) const
	Get an error matrix of the track.

double	getCharge (void) const
	Get a charge of the track.

double	getMass (void) const
	Get a mass of the track.

const HepPoint3D	getVertex (void) const
	Get a vertex position associated to the track.

const CLHEP::HepSymMatrix	getVertexError (void) const
	Get a vertex error matrix associated to the track.

double	getFitParameter (const int which, const int flag) const
	Get a parameter of the track.

const CLHEP::HepMatrix	getFitParameter (const int flag) const
	Get a parameter set of the track.

const CLHEP::HepSymMatrix	getFitError (const int flag) const
	Get an error matrix of the track.

const CLHEP::HepMatrix	getMomPos (const int flag) const
	Get a combination of Lorentz vector and position of the track.

Private Member Functions
void	checkFlag (const int flag) const
	Check if the flag is one of KFitConst::kBeforeFit or KFitConst::kAfterFit.

void	checkMatrixDimension (const CLHEP::HepSymMatrix &m, const int dim) const
	Check if the matrix size is intended one.

Private Attributes
struct KFitPXE	m_PXEBefore
	Lorentz vector, position, and error matrix of the track before the fit.

struct KFitPXE	m_PXEAfter
	Lorentz vector, position, and error matrix of the track after the fit.

double	m_Charge
	Charge of the track.

double	m_Mass
	Mass of the track.

HepPoint3D	m_Vertex
	Vertex position associated to the track.

CLHEP::HepSymMatrix	m_VertexError
	Vertex error matrix associated to the track.

Detailed Description

KFitTrack is a container of the track information (Lorentz vector, position, and error matrix), and a set of macro functions to set/get the contents.

Definition at line 38 of file KFitTrack.h.

Constructor & Destructor Documentation

◆ KFitTrack() [1/2]

KFitTrack ( void )

Construct an object with no argument.

Definition at line 21 of file KFitTrack.cc.

{
  this->m_PXEBefore.m_P  = HepLorentzVector();
  this->m_PXEBefore.m_X  = HepPoint3D();
  this->m_PXEBefore.m_E  = HepSymMatrix(KFitConst::kNumber7, 0);
  this->m_PXEAfter. m_P  = HepLorentzVector();
  this->m_PXEAfter. m_X  = HepPoint3D();
  this->m_PXEAfter. m_E  = HepSymMatrix(KFitConst::kNumber7, 0);
  this->m_Charge         = 0.;
  this->m_Mass           = 0.;
  this->m_Vertex         = HepPoint3D();
  this->m_VertexError    = HepSymMatrix(3, 0);
}

◆ KFitTrack() [2/2]

KFitTrack	(	const CLHEP::HepLorentzVector &	p,
		const HepPoint3D &	x,
		const CLHEP::HepSymMatrix &	e,
		const double	q,
		const int	flag = `KFitConst::kBeforeFit`
	)

Construct the object with track properties.

Parameters

p	Lorentz vector of the track
x	position of the track
e	(7x7) error matrix of the track
q	charge of the track
flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Definition at line 39 of file KFitTrack.cc.

{
  checkFlag(flag);
  checkMatrixDimension(e, KFitConst::kNumber7);
 
  switch (flag) {
    case KFitConst::kBeforeFit:
      m_PXEBefore.m_P = p;
      m_PXEBefore.m_X = x;
      m_PXEBefore.m_E = e;
      m_PXEAfter.m_P  = HepLorentzVector();
      m_PXEAfter.m_X  = HepPoint3D();
      m_PXEAfter.m_E  = HepSymMatrix(KFitConst::kNumber7, 0);
      break;
 
    case KFitConst::kAfterFit:
      m_PXEBefore.m_P = HepLorentzVector();
      m_PXEBefore.m_X = HepPoint3D();
      m_PXEBefore.m_E = HepSymMatrix(KFitConst::kNumber7, 0);
      m_PXEAfter.m_P  = p;
      m_PXEAfter.m_X  = x;
      m_PXEAfter.m_E  = e;
      break;
  }
 
  m_Charge      = charge;
  m_Mass        = p.mag();
  m_Vertex      = HepPoint3D();
  m_VertexError = HepSymMatrix(3, 0);
}

Member Function Documentation

◆ checkFlag()

void checkFlag ( const int flag ) const

inlineprivate

Check if the flag is one of KFitConst::kBeforeFit or KFitConst::kAfterFit.

If check fails, abort the program.

Parameters

flag

Definition at line 164 of file KFitTrack.h.

      {
        if (flag != KFitConst::kBeforeFit && flag != KFitConst::kAfterFit) B2FATAL("checkFlag");
      }

◆ checkMatrixDimension()

void checkMatrixDimension	(	const CLHEP::HepSymMatrix &	m,
		const int	dim
	)		const

inlineprivate

Check if the matrix size is intended one.

If check fails, abort the program.

Parameters

m	matrix to be tested
dim	size of the matrix

Definition at line 173 of file KFitTrack.h.

      {
        if (m.num_row() != dim) B2FATAL("checkMatrixDimension");
      }

◆ getCharge()

double getCharge ( void ) const

Get a charge of the track.

Definition at line 180 of file KFitTrack.cc.

{
  return m_Charge;
}

◆ getError()

const HepSymMatrix getError ( const int flag = KFitConst::kAfterFit ) const

Get an error matrix of the track.

Parameters

flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Returns: error matrix of the track

Definition at line 172 of file KFitTrack.cc.

{
  checkFlag(flag);
  return flag == KFitConst::kBeforeFit ? m_PXEBefore.m_E : m_PXEAfter.m_E;
}

◆ getFitError()

const HepSymMatrix getFitError ( const int flag ) const

Get an error matrix of the track.

Not intended for end user's use.

Parameters

flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Returns: fitted error matrix

Definition at line 246 of file KFitTrack.cc.

{
  checkFlag(flag);
  HepSymMatrix err(KFitConst::kNumber6, 0);
 
  const HepSymMatrix& e = flag == KFitConst::kBeforeFit ? m_PXEBefore.m_E : m_PXEAfter.m_E;
 
 
  for (int i = 0; i < 3; i++) {
    for (int j = i; j < 3; j++) {
      err[i][j]     = e[i][j];
      err[3 + i][3 + j] = e[4 + i][4 + j];
    }
  }
 
  for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 3; j++) {
      err[i][3 + j]   = e[i][4 + j];
    }
  }
 
  return err;
}

◆ getFitParameter() [1/2]

const HepMatrix getFitParameter ( const int flag ) const

Get a parameter set of the track.

Not intended for end user's use.

Parameters

flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Returns: array of getFitParameter(0,flag) ... getFitParameter(5,flag)

Definition at line 234 of file KFitTrack.cc.

{
  HepMatrix a(KFitConst::kNumber6, 1, 0);
 
  for (int i = 0; i <= 5; i++)
    a[i][0] = getFitParameter(i, flag);
 
  return a;
}

◆ getFitParameter() [2/2]

double getFitParameter	(	const int	which,
		const int	flag
	)		const

Get a parameter of the track.

Not intended for end user's use.

Parameters

which	(0,1,2,3,4,5) = (Px,Py,Pz,Xx,Xy,Xz)
flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Returns: corresponding parameter

Definition at line 208 of file KFitTrack.cc.

{
  checkFlag(flag);
 
  const struct KFitPXE& pxe = flag == KFitConst::kBeforeFit ? m_PXEBefore : m_PXEAfter;
 
  switch (which) {
    case 0: return pxe.m_P.x();
    case 1: return pxe.m_P.y();
    case 2: return pxe.m_P.z();
    case 3: return pxe.m_X.x();
    case 4: return pxe.m_X.y();
    case 5: return pxe.m_X.z();
    default: {
      char buf[1024];
      sprintf(buf, "%s:%s(): which=%d out of range", __FILE__, __func__, which);
      B2FATAL(buf);
    }
  }
 
  /* NEVER REACHED */
  return -999.;
}

◆ getMass()

double getMass ( void ) const

Get a mass of the track.

Definition at line 187 of file KFitTrack.cc.

{
  return m_Mass;
}

◆ getMomentum()

const HepLorentzVector getMomentum ( const int flag = KFitConst::kAfterFit ) const

Get a Lorentz vector of the track.

Parameters

flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Returns: Lorentz vector of the track

Definition at line 156 of file KFitTrack.cc.

{
  checkFlag(flag);
  return flag == KFitConst::kBeforeFit ? m_PXEBefore.m_P : m_PXEAfter.m_P;
}

◆ getMomPos()

const HepMatrix getMomPos ( const int flag ) const

Get a combination of Lorentz vector and position of the track.

Not intended for end user's use.

Parameters

flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Returns: combination of Lorentz vector and position

Definition at line 272 of file KFitTrack.cc.

{
  HepMatrix a(KFitConst::kNumber7, 1, 0);
 
  switch (flag) {
    case KFitConst::kBeforeFit:
      a[0][0] = m_PXEBefore.m_P.x();
      a[1][0] = m_PXEBefore.m_P.y();
      a[2][0] = m_PXEBefore.m_P.z();
      a[3][0] = m_PXEBefore.m_P.t();
      a[4][0] = m_PXEBefore.m_X.x();
      a[5][0] = m_PXEBefore.m_X.y();
      a[6][0] = m_PXEBefore.m_X.z();
      break;
 
    case KFitConst::kAfterFit:
      a[0][0] = m_PXEAfter.m_P.x();
      a[1][0] = m_PXEAfter.m_P.y();
      a[2][0] = m_PXEAfter.m_P.z();
      a[3][0] = m_PXEAfter.m_P.t();
      a[4][0] = m_PXEAfter.m_X.x();
      a[5][0] = m_PXEAfter.m_X.y();
      a[6][0] = m_PXEAfter.m_X.z();
  }
 
  return a;
}

◆ getPosition()

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

Get a position of the track.

Parameters

flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Returns: position of the track

Definition at line 164 of file KFitTrack.cc.

{
  checkFlag(flag);
  return flag == KFitConst::kBeforeFit ? m_PXEBefore.m_X : m_PXEAfter.m_X;
}

◆ getVertex()

const HepPoint3D getVertex ( void ) const

Get a vertex position associated to the track.

Definition at line 194 of file KFitTrack.cc.

{
  return m_Vertex;
}

◆ getVertexError()

const HepSymMatrix getVertexError ( void ) const

Get a vertex error matrix associated to the track.

Definition at line 201 of file KFitTrack.cc.

{
  return m_VertexError;
}

◆ operator=()

KFitTrack & operator= ( const KFitTrack & a )

Operator: assignment operator.

Definition at line 79 of file KFitTrack.cc.

{
  if (this != &a) {
    this->m_PXEBefore   = a.m_PXEBefore;
    this->m_PXEAfter    = a.m_PXEAfter;
    this->m_Charge      = a.m_Charge;
    this->m_Mass        = a.m_Mass;
    this->m_Vertex      = a.m_Vertex;
    this->m_VertexError = a.m_VertexError;
  }
 
  return *this;
}

◆ setCharge()

void setCharge ( const double q )

Set a charge of the track.

Parameters

q	charge of the track

Definition at line 134 of file KFitTrack.cc.

{
  m_Charge = charge;
}

◆ setError()

void setError	(	const CLHEP::HepSymMatrix &	e,
		const int	flag = `KFitConst::kBeforeFit`
	)

Set an error matrix of the track.

Parameters

e	error matrix of the track
flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Definition at line 121 of file KFitTrack.cc.

{
  checkFlag(flag);
  checkMatrixDimension(e, KFitConst::kNumber7);
 
  if (flag == KFitConst::kBeforeFit)
    m_PXEBefore.m_E = e;
  else
    m_PXEAfter.m_E = e;
}

◆ setMomentum()

void setMomentum	(	const CLHEP::HepLorentzVector &	p,
		const int	flag = `KFitConst::kBeforeFit`
	)

Set a Lorentz vector of the track.

Parameters

p	Lorentz vector of the track
flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Definition at line 95 of file KFitTrack.cc.

{
  checkFlag(flag);
 
  if (flag == KFitConst::kBeforeFit)
    m_PXEBefore.m_P = p;
  else
    m_PXEAfter.m_P = p;
 
  m_Mass = p.mag();
}

◆ setPosition()

void setPosition	(	const HepPoint3D &	x,
		const int	flag = `KFitConst::kBeforeFit`
	)

Set a position of the track.

Parameters

x	position of the track
flag	KFitConst::kBeforeFit or KFitConst::kAfterFit

Definition at line 109 of file KFitTrack.cc.

{
  checkFlag(flag);
 
  if (flag == KFitConst::kBeforeFit)
    m_PXEBefore.m_X = x;
  else
    m_PXEAfter.m_X = x;
}

◆ setVertex()

void setVertex ( const HepPoint3D & v )

Set a vertex position associated to the track.

Parameters

v	vertex position associated to the track

Definition at line 141 of file KFitTrack.cc.

{
  m_Vertex = v;
}

◆ setVertexError()

void setVertexError ( const CLHEP::HepSymMatrix & ve )

Set a vertex error matrix associated to the track.

Parameters

ve	vertex error matrix associated to the track

Definition at line 148 of file KFitTrack.cc.

{
  checkMatrixDimension(ve, 3);
  m_VertexError = ve;
}

Member Data Documentation

◆ m_Charge

double m_Charge

private

Charge of the track.

Definition at line 187 of file KFitTrack.h.

◆ m_Mass

double m_Mass

private

Mass of the track.

Definition at line 189 of file KFitTrack.h.

◆ m_PXEAfter

struct KFitPXE m_PXEAfter

private

Lorentz vector, position, and error matrix of the track after the fit.

Definition at line 184 of file KFitTrack.h.

◆ m_PXEBefore

struct KFitPXE m_PXEBefore

private

Lorentz vector, position, and error matrix of the track before the fit.

Definition at line 181 of file KFitTrack.h.

◆ m_Vertex

HepPoint3D m_Vertex

private

Vertex position associated to the track.

Definition at line 192 of file KFitTrack.h.

◆ m_VertexError

CLHEP::HepSymMatrix m_VertexError

private

Vertex error matrix associated to the track.

Definition at line 194 of file KFitTrack.h.

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

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

Classes

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ KFitTrack() [1/2]

◆ KFitTrack() [2/2]

Member Function Documentation

◆ checkFlag()

◆ checkMatrixDimension()

◆ getCharge()

◆ getError()

◆ getFitError()

◆ getFitParameter() [1/2]

◆ getFitParameter() [2/2]

◆ getMass()

◆ getMomentum()

◆ getMomPos()

◆ getPosition()

◆ getVertex()

◆ getVertexError()

◆ operator=()

◆ setCharge()

◆ setError()

◆ setMomentum()

◆ setPosition()

◆ setVertex()

◆ setVertexError()

Member Data Documentation

◆ m_Charge

◆ m_Mass

◆ m_PXEAfter

◆ m_PXEBefore

◆ m_Vertex

◆ m_VertexError