Track Representation module based on a Runge-Kutta algorithm including a full material model. More...

#include <EicRoot/blob/master/GenfitTools/trackrep/RKTrackRep/RKTrackRep.h>

Inheritance diagram for RKTrackRep:

Collaboration diagram for RKTrackRep:

Public Member Functions
	RKTrackRep ()

	RKTrackRep (const TVector3 &pos, const TVector3 &mom, const TVector3 &poserr, const TVector3 &momerr, const int &PDGCode)

	RKTrackRep (const TVector3 &pos, const TVector3 &mom, const int &PDGCode)

	RKTrackRep (const GFTrackCand *aGFTrackCandPtr, int pdgcode=0)

virtual	~RKTrackRep ()

virtual GFAbsTrackRep *	clone () const

virtual GFAbsTrackRep *	prototype () const

double	extrapolate (const GFDetPlane &, TMatrixD &statePred, TMatrixD &covPred)
	returns the tracklength spanned in this extrapolation

double	extrapolate (const GFDetPlane &, TMatrixD &statePred)
	returns the tracklength spanned in this extrapolation

void	extrapolateToPoint (const TVector3 &pos, TVector3 &poca, TVector3 &dirInPoca)
	This method is to extrapolate the track to point of closest approach to a point in space.

void	extrapolateToLine (const TVector3 &point1, const TVector3 &point2, TVector3 &poca, TVector3 &dirInPoca, TVector3 &poca_onwire)
	This method extrapolates to the point of closest approach to a line.

double	stepalong (double h, TVector3 &point, TVector3 &dir)
	make step of h cm along the track, returns the tracklength spanned in this extrapolation

TVector3	getPos (const GFDetPlane &)
	Returns position of the track in the plane.

TVector3	getMom (const GFDetPlane &)
	Returns momentum of the track in the plane.

void	getPosMom (const GFDetPlane &, TVector3 &pos, TVector3 &mom)
	Gets position and momentum in the plane.

void	getPosMomCov (const GFDetPlane &pl, TVector3 &pos, TVector3 &mom, TMatrixD &cov)

double	getCharge () const
	Returns charge.

int	getPDG ()
	method which gets pdg particle code

void	setPropDir (int dir)
	Set propagation direction. (-1,0,1) -> (backward prop,decide myself,forward)

void	switchDirection ()
	Switch propagation direction. Has no effect if propdir is set to 0.

void	setPDG (int)
	Set PDG particle code.

void	setData (const TMatrixD &st, const GFDetPlane &pl, const TMatrixD cov=NULL, const TMatrixD aux=NULL)
	Sets state, plane and (optionally) covariance.

void	setPosMomCov (const TVector3 &pos, const TVector3 &mom, const TMatrixD &cov)
	Sets state, plane and covariance from position, momentum and 6x6 covariance.

void	disableMaterialEffects (bool opt=true)

const TMatrixD *	getAuxInfo (const GFDetPlane &pl)
	Get auxillary information from the track representation.

bool	hasAuxInfo ()
	See if the track representation has auxillary information stored.

Public Member Functions inherited from GFAbsTrackRep
virtual double	extrapolate (const GFDetPlane &plane, TMatrixT< double > &statePred)
	returns the tracklength spanned in this extrapolation

	GFAbsTrackRep ()

	GFAbsTrackRep (int)

virtual	~GFAbsTrackRep ()

virtual double	extrapolate (const GFDetPlane &plane, TMatrixT< double > &statePred, TMatrixT< double > &covPred)=0
	Extrapolates the track to the given detectorplane.

double	extrapolate (const GFDetPlane &plane)
	This changes the state and cov and plane of the rep.

unsigned int	getDim () const
	returns dimension of state vector

virtual void	Print (const Option_t *="") const

TMatrixT< double >	getState () const

TMatrixT< double >	getCov () const

double	getStateElem (int i) const

double	getCovElem (int i, int j) const

virtual void	getPosMomCov (const GFDetPlane &pl, TVector3 &pos, TVector3 &mom, TMatrixT< double > &cov)
	method which gets position, momentum and 6x6 covariance matrix

TVector3	getPos ()

TVector3	getMom ()

void	getPosMomCov (TVector3 &pos, TVector3 &mom, TMatrixT< double > &c)

TMatrixT< double >	getFirstState () const

TMatrixT< double >	getFirstCov () const

GFDetPlane	getFirstPlane () const

TMatrixT< double >	getLastState () const

TMatrixT< double >	getLastCov () const

GFDetPlane	getLastPlane () const

double	getChiSqu () const

double	getForwardChiSqu () const

double	getRedChiSqu () const
	returns chi2/ndf

double	getPVal () const

unsigned int	getNDF () const

double	getXX0 () const
	X/X0 (total fraction of radiation length passed), cumulated during last extrapolation. The fitter has to reset XX0 via resetXX0()

virtual void	setData (const TMatrixT< double > &st, const GFDetPlane &pl, const TMatrixT< double > cov=NULL, const TMatrixT< double > aux=NULL)
	Puts the track representation in a given state.

void	setCov (const TMatrixT< double > &aCov)

void	setFirstState (const TMatrixT< double > &aState)

void	setFirstCov (const TMatrixT< double > &aCov)

void	setFirstPlane (const GFDetPlane &aPlane)

void	setLastState (const TMatrixT< double > &aState)

void	setLastCov (const TMatrixT< double > &aCov)

void	setLastPlane (const GFDetPlane &aPlane)

virtual void	setPosMomCov (const TVector3 &pos, const TVector3 &mom, const TMatrixT< double > &cov)
	method which sets position, momentum and 6x6 covariance matrix

const GFDetPlane &	getReferencePlane () const

void	setChiSqu (double aChiSqu)

void	setForwardChiSqu (double aChiSqu)

void	setNDF (unsigned int n)

void	addChiSqu (double aChiSqu)

void	addForwardChiSqu (double aChiSqu)

void	addNDF (unsigned int n)

void	setStatusFlag (int _val)

bool	setInverted (bool f=true)
	Deprecated. Should be removed soon.

bool	getStatusFlag ()

virtual void	reset ()

void	resetXX0 ()

Private Member Functions
void	initArrays ()

void	calcStateCov (const TVector3 &pos, const TVector3 &mom, const TVector3 &poserr, const TVector3 &momerr)

void	calcState (const TVector3 &pos, const TVector3 &mom)

void	getState7 (M1x7 &state7)

void	getState7 (M1x7 &state7, const TMatrixD &state5, const GFDetPlane &pl, const double &spu)

TMatrixD	getState5 (const M1x7 &state7, const GFDetPlane &pl, double &spu)

void	transformPM7 (const TMatrixD &in5x5, M7x7 &out7x7, const GFDetPlane &pl, const TMatrixD &state5, const double &spu, TMatrixD *Jac=NULL)

void	transformPM6 (const TMatrixD &in5x5, M6x6 &out6x6, const GFDetPlane &pl, const TMatrixD &state5, const double &spu, TMatrixD *Jac=NULL)

void	transformM7P (const M7x7 &in7x7, TMatrixD &out5x5, const GFDetPlane &pl, const M1x7 &state7, TMatrixD *Jac=NULL)

void	transformM6P (const M6x6 &in6x6, TMatrixD &out5x5, const GFDetPlane &pl, const M1x7 &state7, TMatrixD *Jac=NULL)

RKTrackRep &	operator= (const RKTrackRep *)

bool	RKutta (const GFDetPlane &plane, M8x7 &P, double &coveredDistance, std::vector< GFPointPath > &points, bool &checkJacProj, bool calcCov=true, bool onlyOneStep=false, double maxStep=1.E99)
	Propagates the particle through the magnetic field.

double	estimateStep (std::vector< GFPointPath > &points, const TVector3 &pos, const TVector3 &dir, const M1x4 &SU, const TVector3 &MagField, const GFDetPlane &plane, const double &mom, double &relMomLoss, double &deltaAngle, bool &momLossExceeded, bool &atPlane, double maxStep=1.E99) const

TVector3	poca2Line (const TVector3 &extr1, const TVector3 &extr2, const TVector3 &point) const

double	Extrap (const GFDetPlane &plane, M1x7 &state7, M7x7 *cov=NULL, bool onlyOneStep=false, double maxStep=1.E99)
	Handles propagation and material effects.

Private Attributes
int	fDirection

bool	fNoMaterial

int	fPdg
	PDG particle code.

double	fMass
	Mass (in GeV)

double	fCharge
	Charge.

GFDetPlane	fCachePlane

double	fCacheSpu

double	fSpu

TMatrixD	fAuxInfo

TVector3	fO

TVector3	fU

TVector3	fV

TVector3	fW

TVector3	fPos

TVector3	fDir

TVector3	fpTilde

TVector3	fDirectionBefore

TVector3	fDirectionAfter

TVector3	fH

M8x7	fStateJac

M7x7	fNoise

M7x7	fOldCov

M5x7	fJ_pM_5x7

M5x6	fJ_pM_5x6

M7x5	fJ_Mp_7x5

M6x5	fJ_Mp_6x5

Additional Inherited Members
Protected Attributes inherited from GFAbsTrackRep
unsigned int	fDimension
	Dimensionality of track representation.

TMatrixT< double >	fState
	The vector of track parameters.

TMatrixT< double >	fCov
	The covariance matrix.

double	fChiSqu
	chiSqu of the track fit

double	fForwardChiSqu

unsigned int	fNdf

int	fStatusFlag
	status of track representation: 0 means everything's OK

bool	fInverted
	specifies the direction of flight of the particle

TMatrixT< double >	fFirstState
	state, cov and plane for first and last point in fit

TMatrixT< double >	fFirstCov

TMatrixT< double >	fLastState

TMatrixT< double >	fLastCov

GFDetPlane	fFirstPlane

GFDetPlane	fLastPlane

GFDetPlane	fRefPlane

double	fXX0

Detailed Description

Track Representation module based on a Runge-Kutta algorithm including a full material model.

Author: Christian Höppner (Technische Universität München, original author); Johannes Rauch (Technische Universität München, author)

The Runge Kutta implementation stems from GEANT3 originally (R. Brun et al.). Porting to C goes back to Igor Gavrilenko @ CERN. The code was taken from the Phast analysis package of the COMPASS experiment (Sergei Gerrassimov @ CERN).

The state is 5D: (q/p, u', v', u,v)

Definition at line 53 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 53 of file RKTrackRep.h

Constructor & Destructor Documentation

RKTrackRep::RKTrackRep ( )

Definition at line 65 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 65 of file RKTrackRep.cxx

References initArrays().

Referenced by clone(), and prototype().

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RKTrackRep::RKTrackRep	(	const TVector3 &	pos,
		const TVector3 &	mom,
		const TVector3 &	poserr,
		const TVector3 &	momerr,
		const int &	PDGCode
	)

Definition at line 70 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 70 of file RKTrackRep.cxx

References calcStateCov(), initArrays(), and setPDG().

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RKTrackRep::RKTrackRep	(	const TVector3 &	pos,
		const TVector3 &	mom,
		const int &	PDGCode
	)

Definition at line 83 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 83 of file RKTrackRep.cxx

References calcState(), GFAbsTrackRep::fCov, initArrays(), setPDG(), and value.

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RKTrackRep::RKTrackRep	(	const GFTrackCand *	aGFTrackCandPtr,
		int	pdgcode = `0`
	)

Definition at line 103 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 103 of file RKTrackRep.cxx

References calcStateCov(), GFTrackCand::getCovSeed(), GFTrackCand::getPdgCode(), GFTrackCand::getStateSeed(), initArrays(), charm_jet_coverage::mom, pos(), and setPDG().

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RKTrackRep::~RKTrackRep ( )

virtual

Definition at line 46 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 46 of file RKTrackRep.cxx

Member Function Documentation

void RKTrackRep::calcState	(	const TVector3 &	pos,
		const TVector3 &	mom
	)

private

Definition at line 226 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 226 of file RKTrackRep.cxx

References fCharge, GFAbsTrackRep::fRefPlane, fSpu, GFAbsTrackRep::fState, and GFDetPlane::setON().

Referenced by calcStateCov(), RKTrackRep(), and setPosMomCov().

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void RKTrackRep::calcStateCov	(	const TVector3 &	pos,
		const TVector3 &	mom,
		const TVector3 &	poserr,
		const TVector3 &	momerr
	)

private

Definition at line 187 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 187 of file RKTrackRep.cxx

References calcState(), fCharge, GFAbsTrackRep::fCov, GFAbsTrackRep::fRefPlane, fU, fV, fW, GFDetPlane::getNormal(), GFDetPlane::getU(), and GFDetPlane::getV().

Referenced by RKTrackRep().

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virtual GFAbsTrackRep* RKTrackRep::clone ( ) const

inlinevirtual

Implements GFAbsTrackRep.

Definition at line 74 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 74 of file RKTrackRep.h

References RKTrackRep().

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void RKTrackRep::disableMaterialEffects ( bool opt = true )

inline

Definition at line 222 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 222 of file RKTrackRep.h

References fNoMaterial.

double RKTrackRep::estimateStep	(	std::vector< GFPointPath > &	points,
		const TVector3 &	pos,
		const TVector3 &	dir,
		const M1x4 &	SU,
		const TVector3 &	MagField,
		const GFDetPlane &	plane,
		const double &	mom,
		double &	relMomLoss,
		double &	deltaAngle,
		bool &	momLossExceeded,
		bool &	atPlane,
		double	maxStep = `1.E99`
	)		const

private

Definition at line 1347 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 1347 of file RKTrackRep.cxx

References starlightConstants::A2, fCharge, fDirection, fNoMaterial, fPdg, GFMaterialEffects::getInstance(), GFDetPlane::inActive(), MINSTEP, momentum, G4BECAL::radius, and GFMaterialEffects::stepper().

Referenced by RKutta().

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double RKTrackRep::Extrap	(	const GFDetPlane &	plane,
		M1x7 &	state7,
		M7x7 *	cov = `NULL`,
		bool	onlyOneStep = `false`,
		double	maxStep = `1.E99`
	)

private

Handles propagation and material effects.

extrapolate(), extrapolateToPoint() and extrapolateToLine() call this function. Extrap() needs a plane as an argument, hence extrapolateToPoint() and extrapolateToLine() create virtual detector planes. In this function, RKutta() is called and the resulting points and point paths are filtered so that the direction doesn't change and tiny steps are filtered out. After the propagation the material effects are called via the GFMaterialEffects singleton. Extrap() will loop until the plane is reached, unless the propagation fails or the maximum number of iterations is exceeded. fXX0 is also updated here.

Definition at line 829 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 829 of file RKTrackRep.cxx

References GFDetPlane::distance(), GFMaterialEffects::effects(), fCharge, fDirectionAfter, fDirectionBefore, fNoise, fNoMaterial, fOldCov, fPdg, fPos, fStateJac, GFAbsTrackRep::fXX0, GFMaterialEffects::getInstance(), GFDetPlane::inActive(), RKTools::J_MMTxcov7xJ_MM(), MINSTEP, RKutta(), and GFException::setFatal().

Referenced by extrapolate(), extrapolateToLine(), extrapolateToPoint(), getMom(), getPos(), getPosMom(), and stepalong().

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double RKTrackRep::extrapolate	(	const GFDetPlane &	pl,
		TMatrixD &	statePred,
		TMatrixD &	covPred
	)

returns the tracklength spanned in this extrapolation

The covariance matrix is transformed from the plane coordinate system to the master reference system (for the propagation) and, after propagation, back to the plane coordinate system.
Also the parameter spu (which is +1 or -1 and indicates the direction of the particle) is calculated and stored in fCacheSpu. The plane is stored in fCachePlane.
The transformation from plane- to master reference system obeys:

$\begin{eqnarray*} \boldsymbol{\mathbf{x}} & = \boldsymbol{\mathbf{O}}+u\boldsymbol{\mathbf{U}}+v\boldsymbol{\mathbf{V}} \\ \boldsymbol{\mathbf{a}} & = \frac{\boldsymbol{\mathbf{\widetilde{p}}}}{\widetilde{p}} \\ \frac{q}{p} & = \frac{q}{p} \end{eqnarray*}$

with

$\begin{eqnarray*} \boldsymbol{\mathbf{\widetilde{p}}} & = spu \cdot \left(\boldsymbol{\mathbf{N}}+u^{\prime} \boldsymbol{\mathbf{U}} + v^{\prime} \boldsymbol{\mathbf{V}}\right) \\ \widetilde{p} & = \left| \boldsymbol{\mathbf{\widetilde{p}}} \right| \textrm{.} \end{eqnarray*}$

The following equations define the transformation from master- to plane reference system:

$\begin{eqnarray*} \frac{q}{p} & = \frac{q}{p} \\ u^{\prime} & = \frac{\boldsymbol{\mathbf{a}} \boldsymbol{\mathbf{U}}}{\boldsymbol{\mathbf{a}} \boldsymbol{\mathbf{N}}} \\ v^{\prime} & = \frac{\boldsymbol{\mathbf{a}} \boldsymbol{\mathbf{V}}}{\boldsymbol{\mathbf{a}} \boldsymbol{\mathbf{N}}} \\ u & = \left(\boldsymbol{\mathbf{x}}-\boldsymbol{\mathbf{O}}\right)\boldsymbol{\mathbf{U}}\\ v & = \left(\boldsymbol{\mathbf{x}}-\boldsymbol{\mathbf{O}}\right)\boldsymbol{\mathbf{V}}\\ \end{eqnarray*}$

with

$\begin{eqnarray*} spu & = \frac{\boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}}}{\left|\boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}} \right| }=\pm1 \textrm{.} \end{eqnarray*}$

Jacobians:

$\begin{eqnarray*} C_M & = J_{p,M} \, C_p \, J_{p,M}^T \\ J_{p,M} & = \begin{pmatrix} \frac{\partial x}{\partial\frac{q}{p}} & \frac{\partial x}{\partial u^{\prime}} & \frac{\partial x}{\partial v^{\prime}} & \frac{\partial x}{\partial u} & \frac{\partial x}{\partial v} \\ \frac{\partial y}{\partial\frac{q}{p}} & \frac{\partial y}{\partial u^{\prime}} & \frac{\partial y}{\partial v^{\prime}} & \frac{\partial y}{\partial u} & \frac{\partial y}{\partial v} \\ \frac{\partial z}{\partial\frac{q}{p}} & \frac{\partial z}{\partial u^{\prime}} & \frac{\partial z}{\partial v^{\prime}} & \frac{\partial z}{\partial u} & \frac{\partial z}{\partial v} \\ \frac{\partial a_{x}}{\partial\frac{q}{p}} & \frac{\partial a_{x}}{\partial u^{\prime}} & \frac{\partial a_{x}}{\partial v^{\prime}} & \frac{\partial a_{x}}{\partial u} & \frac{\partial a_{x}}{\partial v} \\ \frac{\partial a_{y}}{\partial\frac{q}{p}} & \frac{\partial a_{y}}{\partial u^{\prime}} & \frac{\partial a_{y}}{\partial v^{\prime}} & \frac{\partial a_{y}}{\partial u} & \frac{\partial a_{y}}{\partial v} \\ \frac{\partial a_{z}}{\partial\frac{q}{p}} & \frac{\partial a_{z}}{\partial u^{\prime}} & \frac{\partial a_{z}}{\partial v^{\prime}} & \frac{\partial a_{z}}{\partial u} & \frac{\partial a_{z}}{\partial v} \\ \frac{\partial\frac{q}{p}}{\partial\frac{q}{p}} & \frac{\partial\frac{q}{p}}{\partial u^{\prime}} & \frac{\partial\frac{q}{p}}{\partial v^{\prime}} & \frac{\partial\frac{q}{p}}{\partial u} & \frac{\partial\frac{q}{p}}{\partial v} \\ \end{pmatrix} \\ & = \begin{pmatrix} 0 & 0 & 0 & U_{x} & V_{x} \\ 0 & 0 & 0 & U_{y} & V_{y} \\ 0 & 0 & 0 & U_{z} & V_{z} \\ 0 & \frac{d}{\widetilde{p}} \left( U_{x} - \frac{\widetilde{p}_{x}}{\widetilde{p}^2} \boldsymbol{\mathbf{U}} \boldsymbol{\mathbf{\widetilde{p}}}\right) & \frac{d}{\widetilde{p}} \left( V_{x} - \frac{\widetilde{p}_{x}}{\widetilde{p}^2} \boldsymbol{\mathbf{V}} \boldsymbol{\mathbf{\widetilde{p}}}\right) & 0 & 0 \\ 0 & \frac{d}{\widetilde{p}} \left( U_{y} - \frac{\widetilde{p}_{x}}{\widetilde{p}^2} \boldsymbol{\mathbf{U}} \boldsymbol{\mathbf{\widetilde{p}}}\right) & \frac{d}{\widetilde{p}} \left( V_{y} - \frac{\widetilde{p}_{x}}{\widetilde{p}^2} \boldsymbol{\mathbf{V}} \boldsymbol{\mathbf{\widetilde{p}}}\right) & 0 & 0 \\ 0 & \frac{d}{\widetilde{p}} \left( U_{z} - \frac{\widetilde{p}_{x}}{\widetilde{p}^2} \boldsymbol{\mathbf{U}} \boldsymbol{\mathbf{\widetilde{p}}}\right) & \frac{d}{\widetilde{p}} \left( V_{z} - \frac{\widetilde{p}_{x}}{\widetilde{p}^2} \boldsymbol{\mathbf{V}} \boldsymbol{\mathbf{\widetilde{p}}}\right) & 0 & 0 \\ 1 & 0 & 0 & 0 & 0 \end{pmatrix} \\ C_p & = J_{M.p} \, C_M \, J_{M,p}^T \\ J_{M,p} & = \begin{pmatrix} \frac{\partial\frac{q}{p}}{\partial x} & \frac{\partial\frac{q}{p}}{\partial y} & \frac{\partial\frac{q}{p}}{\partial z} & \frac{\partial\frac{q}{p}}{\partial a_{x}} & \frac{\partial\frac{q}{p}}{\partial a_{y}} & \frac{\partial\frac{q}{p}}{\partial a_{z}} & \frac{\partial\frac{q}{p}}{\partial\frac{q}{p}} \\ \frac{\partial u^{\prime}}{\partial x} & \frac{\partial u^{\prime}}{\partial y} & \frac{\partial u^{\prime}}{\partial z} & \frac{\partial u^{\prime}}{\partial a_{x}} & \frac{\partial u^{\prime}}{\partial a_{y}} & \frac{\partial u^{\prime}}{\partial a_{z}} & \frac{\partial u^{\prime}}{\partial\frac{q}{p}} \\ \frac{\partial v^{\prime}}{\partial x} & \frac{\partial v^{\prime}}{\partial y} & \frac{\partial v^{\prime}}{\partial z} & \frac{\partial v^{\prime}}{\partial a_{x}} & \frac{\partial v^{\prime}}{\partial a_{y}} & \frac{\partial v^{\prime}}{\partial a_{z}} & \frac{\partial v^{\prime}}{\partial\frac{q}{p}} \\ \frac{\partial u}{\partial x} & \frac{\partial u}{\partial y} & \frac{\partial u}{\partial z} & \frac{\partial u}{\partial a_{x}} & \frac{\partial u}{\partial a_{y}} & \frac{\partial u}{\partial a_{z}} & \frac{\partial u}{\partial\frac{q}{p}} \\ \frac{\partial v}{\partial x} & \frac{\partial v}{\partial y} & \frac{\partial v}{\partial z} & \frac{\partial v}{\partial a_{x}} & \frac{\partial v}{\partial a_{y}} & \frac{\partial v}{\partial a_{z}} & \frac{\partial v}{\partial\frac{q}{p}} \\ \end{pmatrix} \\ & = \begin{pmatrix} 0 & 0 & 0 & 0 & 0 & 0 & 1\\ 0 & 0 & 0 & \frac{U_{x} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}} - N_{x} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{U}}}{\left(\boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}}\right)^{2}} & \frac{U_{y} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}} - N_{y} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{U}}}{\left(\boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}}\right)^{2}} & \frac{U_{z} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}} - N_{z} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{U}}}{\left(\boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}}\right)^{2}} & 0\\ 0 & 0 & 0 & \frac{V_{x} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}} - N_{x} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{V}}}{\left(\boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}}\right)^{2}} & \frac{V_{y} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}} - N_{y} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{V}}}{\left(\boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}}\right)^{2}} & \frac{V_{z} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}} - N_{z} \boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{V}}}{\left(\boldsymbol{\mathbf{a}}\boldsymbol{\mathbf{N}}\right)^{2}} & 0\\ U_{x} & U_{y} & U_{z} & 0 & 0 & 0 & 0\\ V_{x} & V_{y} & V_{z} & 0 & 0 & 0 & 0\\ \end{pmatrix} \end{eqnarray*}$

Definition at line 742 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 742 of file RKTrackRep.cxx

References Extrap(), fCachePlane, fCacheSpu, GFAbsTrackRep::fCov, GFAbsTrackRep::fRefPlane, fSpu, GFAbsTrackRep::fState, getState5(), getState7(), transformM7P(), and transformPM7().

Referenced by getPosMomCov().

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double RKTrackRep::extrapolate	(	const GFDetPlane &	pl,
		TMatrixD &	statePred
	)

returns the tracklength spanned in this extrapolation

Definition at line 769 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 769 of file RKTrackRep.cxx

References Extrap(), getState5(), and getState7().

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void RKTrackRep::extrapolateToLine	(	const TVector3 &	point1,
		const TVector3 &	point2,
		TVector3 &	poca,
		TVector3 &	dirInPoca,
		TVector3 &	poca_onwire
	)

virtual

This method extrapolates to the point of closest approach to a line.

Reimplemented from GFAbsTrackRep.

Definition at line 683 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 683 of file RKTrackRep.cxx

References Extrap(), fDir, getState7(), MINSTEP, poca2Line(), GFDetPlane::setO(), GFDetPlane::setU(), GFDetPlane::setV(), and Acts::Test::step().

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void RKTrackRep::extrapolateToPoint	(	const TVector3 &	pos,
		TVector3 &	poca,
		TVector3 &	dirInPoca
	)

virtual

This method is to extrapolate the track to point of closest approach to a point in space.

Reimplemented from GFAbsTrackRep.

Definition at line 616 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 616 of file RKTrackRep.cxx

References Extrap(), fDir, getState7(), MINSTEP, GFDetPlane::setON(), and Acts::Test::step().

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const TMatrixD * RKTrackRep::getAuxInfo ( const GFDetPlane & )

virtual

Get auxillary information from the track representation.

AuxInfo is a mechanism which allows creators of track repersentations to hand out any information they like (as long as it is compatible with a TMatrixT<double>). It should be used if setData requires additional information to update the representation, but it can also be used for debugging information if needed. See also the documentation of GFAbsTrackRep::setData().

Reimplemented from GFAbsTrackRep.

Definition at line 161 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 161 of file RKTrackRep.cxx

References fAuxInfo, fCachePlane, fCacheSpu, and fDirection.

double RKTrackRep::getCharge ( ) const

inlinevirtual

Returns charge.

Implements GFAbsTrackRep.

Definition at line 192 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 192 of file RKTrackRep.h

References fCharge.

TVector3 RKTrackRep::getMom ( const GFDetPlane & pl )

virtual

Returns momentum of the track in the plane.

If GFDetPlane equals the reference plane fRefPlane, returns current momentum; otherwise it extrapolates the track to the plane and returns the momentum.

Implements GFAbsTrackRep.

Definition at line 541 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 541 of file RKTrackRep.cxx

References Extrap(), fCharge, GFAbsTrackRep::fRefPlane, getState7(), and charm_jet_coverage::mom.

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int RKTrackRep::getPDG ( )

inlinevirtual

method which gets pdg particle code

default implementation in cxx; should be implemented in a ConcreteTrackRep

Reimplemented from GFAbsTrackRep.

Definition at line 194 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 194 of file RKTrackRep.h

References fPdg.

TVector3 RKTrackRep::getPos ( const GFDetPlane & pl )

virtual

Returns position of the track in the plane.

If GFDetPlane equals the reference plane fRefPlane, returns current position; otherwise it extrapolates the track to the plane and returns the position.

Implements GFAbsTrackRep.

Definition at line 530 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 530 of file RKTrackRep.cxx

References Extrap(), GFAbsTrackRep::fRefPlane, and getState7().

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void RKTrackRep::getPosMom	(	const GFDetPlane &	pl,
		TVector3 &	pos,
		TVector3 &	mom
	)

virtual

Gets position and momentum in the plane.

If GFDetPlane equals the reference plane fRefPlane, it gets current position and momentum; otherwise it extrapolates the track to the plane and gets the position and momentum.

Implements GFAbsTrackRep.

Definition at line 555 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 555 of file RKTrackRep.cxx

References Extrap(), fCharge, GFAbsTrackRep::fRefPlane, and getState7().

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void RKTrackRep::getPosMomCov	(	const GFDetPlane &	pl,
		TVector3 &	pos,
		TVector3 &	mom,
		TMatrixD &	cov
	)

Definition at line 569 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 569 of file RKTrackRep.cxx

References extrapolate(), fCacheSpu, fCharge, GFAbsTrackRep::fCov, GFAbsTrackRep::fRefPlane, fSpu, GFAbsTrackRep::fState, getState7(), and transformPM6().

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TMatrixD RKTrackRep::getState5	(	const M1x7 &	state7,
		const GFDetPlane &	pl,
		double &	spu
	)

private

Definition at line 273 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 273 of file RKTrackRep.cxx

References fDir, fPos, fU, fV, GFDetPlane::getNormal(), GFDetPlane::getO(), GFDetPlane::getU(), and GFDetPlane::getV().

Referenced by extrapolate().

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void RKTrackRep::getState7 ( M1x7 & state7 )

private

Definition at line 245 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 245 of file RKTrackRep.cxx

References GFAbsTrackRep::fRefPlane, fSpu, and GFAbsTrackRep::fState.

Referenced by extrapolate(), extrapolateToLine(), extrapolateToPoint(), getMom(), getPos(), getPosMom(), getPosMomCov(), setPosMomCov(), and stepalong().

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void RKTrackRep::getState7	(	M1x7 &	state7,
		const TMatrixD &	state5,
		const GFDetPlane &	pl,
		const double &	spu
	)

private

Definition at line 250 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 250 of file RKTrackRep.cxx

References fO, fU, fV, fW, GFDetPlane::getNormal(), GFDetPlane::getO(), GFDetPlane::getU(), and GFDetPlane::getV().

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bool RKTrackRep::hasAuxInfo ( )

inlinevirtual

See if the track representation has auxillary information stored.

See if auxillary information is stored in the track representation. See the documentation of GFAbsTrackRep::getAuxInfo() for details.

Reimplemented from GFAbsTrackRep.

Definition at line 226 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 226 of file RKTrackRep.h

void RKTrackRep::initArrays ( )

private

Definition at line 132 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 132 of file RKTrackRep.cxx

References fJ_Mp_6x5, fJ_Mp_7x5, fJ_pM_5x6, fJ_pM_5x7, fNoise, and fStateJac.

Referenced by RKTrackRep().

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RKTrackRep& RKTrackRep::operator= ( const RKTrackRep * )

inlineprivate

Definition at line 272 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 272 of file RKTrackRep.h

TVector3 RKTrackRep::poca2Line	(	const TVector3 &	extr1,
		const TVector3 &	extr2,
		const TVector3 &	point
	)		const

private

Definition at line 670 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 670 of file RKTrackRep.cxx

References t.

Referenced by extrapolateToLine().

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virtual GFAbsTrackRep* RKTrackRep::prototype ( ) const

inlinevirtual

Implements GFAbsTrackRep.

Definition at line 75 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 75 of file RKTrackRep.h

References RKTrackRep().

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bool RKTrackRep::RKutta	(	const GFDetPlane &	plane,
		M8x7 &	P,
		double &	coveredDistance,
		std::vector< GFPointPath > &	points,
		bool &	checkJacProj,
		bool	calcCov = `true`,
		bool	onlyOneStep = `false`,
		double	maxStep = `1.E99`
	)

private

Propagates the particle through the magnetic field.

If the propagation is successfull and the plane is reached, the function returns true. The argument P has to contain the state (#P[0] - #P[6]) and a unity matrix (#P[7] - #P[55]) with the last column multiplied wit q/p (hence #P[55] is not 1 but q/p). Propagated state and the jacobian (with the last column multiplied wit q/p) of the extrapolation are written to #P. In the main loop of the Runge Kutta algorithm, the steppers in #fEffect are called and may reduce the estimated stepsize so that a maximum momentum loss will not be exceeded. If this is the case, RKutta() will only propagate the reduced distance and then return. This is to ensure that material effects, which are calculated after the propagation, are taken into account properly.

Definition at line 1011 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 1011 of file RKTrackRep.cxx

References starlightConstants::A2, charm_jet_strange_helicity::dA, GFDetPlane::distance(), estimateStep(), fCharge, fDir, fH, fPos, GFFieldManager::getFieldVal(), GFDetPlane::getNormal(), GFDetPlane::getO(), MINSTEP, momentum, GFDetPlane::Print(), Acts::IntegrationTest::R, and GFException::setFatal().

Referenced by Extrap().

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void RKTrackRep::setData	(	const TMatrixD &	st,
		const GFDetPlane &	pl,
		const TMatrixD *	cov = `NULL`,
		const TMatrixD *	aux = `NULL`
	)

Sets state, plane and (optionally) covariance.

This function also sets the parameter fSpu to the value stored in fCacheSpu. Therefore it has to be ensured that the plane #pl is the same as the plane of the last extrapolation (i.e. fCachePlane), where fCacheSpu was calculated. Hence, if the argument #pl is not equal to fCachePlane, an error message is shown an an exception is thrown.

Definition at line 144 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 144 of file RKTrackRep.cxx

References fCachePlane, fCacheSpu, fCharge, fDirection, fSpu, GFAbsTrackRep::fState, and GFAbsTrackRep::setData().

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void RKTrackRep::setPDG ( int i )

Set PDG particle code.

Definition at line 174 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 174 of file RKTrackRep.cxx

References fCharge, fMass, fPdg, and part.

Referenced by RKTrackRep().

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void RKTrackRep::setPosMomCov	(	const TVector3 &	pos,
		const TVector3 &	mom,
		const TMatrixD &	cov
	)

Sets state, plane and covariance from position, momentum and 6x6 covariance.

Also sets the reference plane at position

Definition at line 593 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 593 of file RKTrackRep.cxx

References calcState(), fCachePlane, fCacheSpu, GFAbsTrackRep::fCov, GFAbsTrackRep::fRefPlane, getState7(), and transformM6P().

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void RKTrackRep::setPropDir ( int dir )

Set propagation direction. (-1,0,1) -> (backward prop,decide myself,forward)

Definition at line 1557 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 1557 of file RKTrackRep.cxx

References fDirection.

double RKTrackRep::stepalong	(	double	h,
		TVector3 &	point,
		TVector3 &	dir
	)

virtual

make step of h cm along the track, returns the tracklength spanned in this extrapolation

Also returns the position and direction by reference. It does NOT alter the state of the trackrep and starts extrapolating from fRefPlane.

Reimplemented from GFAbsTrackRep.

Definition at line 787 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 787 of file RKTrackRep.cxx

References Extrap(), getState7(), MINSTEP, and GFDetPlane::setON().

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void RKTrackRep::switchDirection ( )

inlinevirtual

Switch propagation direction. Has no effect if propdir is set to 0.

Implements GFAbsTrackRep.

Definition at line 200 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 200 of file RKTrackRep.h

References fDirection.

void RKTrackRep::transformM6P	(	const M6x6 &	in6x6,
		TMatrixD &	out5x5,
		const GFDetPlane &	pl,
		const M1x7 &	state7,
		TMatrixD *	Jac = `NULL`
	)

private

Definition at line 472 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 472 of file RKTrackRep.cxx

References fCharge, fDir, fJ_Mp_6x5, fU, fV, fW, GFDetPlane::getNormal(), GFDetPlane::getU(), GFDetPlane::getV(), RKTools::J_MpTxcov6xJ_Mp(), and p.

Referenced by setPosMomCov().

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void RKTrackRep::transformM7P	(	const M7x7 &	in7x7,
		TMatrixD &	out5x5,
		const GFDetPlane &	pl,
		const M1x7 &	state7,
		TMatrixD *	Jac = `NULL`
	)

private

Definition at line 419 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 419 of file RKTrackRep.cxx

References fDir, fJ_Mp_7x5, fU, fV, fW, GFDetPlane::getNormal(), GFDetPlane::getU(), GFDetPlane::getV(), and RKTools::J_MpTxcov7xJ_Mp().

Referenced by extrapolate().

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void RKTrackRep::transformPM6	(	const TMatrixD &	in5x5,
		M6x6 &	out6x6,
		const GFDetPlane &	pl,
		const TMatrixD &	state5,
		const double &	spu,
		TMatrixD *	Jac = `NULL`
	)

private

Definition at line 360 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 360 of file RKTrackRep.cxx

References fCharge, fJ_pM_5x6, fpTilde, fU, fV, fW, GFDetPlane::getU(), GFDetPlane::getV(), RKTools::J_pMTxcov5xJ_pM(), and p.

Referenced by getPosMomCov().

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void RKTrackRep::transformPM7	(	const TMatrixD &	in5x5,
		M7x7 &	out7x7,
		const GFDetPlane &	pl,
		const TMatrixD &	state5,
		const double &	spu,
		TMatrixD *	Jac = `NULL`
	)

private

Definition at line 304 of file RKTrackRep.cxx.

View newest version in sPHENIX GitHub at line 304 of file RKTrackRep.cxx

References fJ_pM_5x7, fpTilde, fU, fV, fW, GFDetPlane::getNormal(), GFDetPlane::getU(), GFDetPlane::getV(), and RKTools::J_pMTxcov5xJ_pM().

Referenced by extrapolate().

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Member Data Documentation

TMatrixD RKTrackRep::fAuxInfo

private

Definition at line 345 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 345 of file RKTrackRep.h

Referenced by getAuxInfo().

GFDetPlane RKTrackRep::fCachePlane

private

Definition at line 342 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 342 of file RKTrackRep.h

Referenced by extrapolate(), getAuxInfo(), setData(), and setPosMomCov().

double RKTrackRep::fCacheSpu

private

Definition at line 343 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 343 of file RKTrackRep.h

Referenced by extrapolate(), getAuxInfo(), getPosMomCov(), setData(), and setPosMomCov().

double RKTrackRep::fCharge

private

Charge.

Definition at line 340 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 340 of file RKTrackRep.h

Referenced by calcState(), calcStateCov(), estimateStep(), Extrap(), getCharge(), getMom(), getPosMom(), getPosMomCov(), RKutta(), setData(), setPDG(), transformM6P(), and transformPM6().

TVector3 RKTrackRep::fDir

private

Definition at line 349 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 349 of file RKTrackRep.h

Referenced by extrapolateToLine(), extrapolateToPoint(), getState5(), RKutta(), transformM6P(), and transformM7P().

int RKTrackRep::fDirection

private

Definition at line 332 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 332 of file RKTrackRep.h

Referenced by estimateStep(), getAuxInfo(), setData(), setPropDir(), and switchDirection().

TVector3 RKTrackRep::fDirectionAfter

private

Definition at line 351 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 351 of file RKTrackRep.h

Referenced by Extrap().

TVector3 RKTrackRep::fDirectionBefore

private

Definition at line 351 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 351 of file RKTrackRep.h

Referenced by Extrap().

TVector3 RKTrackRep::fH

private

Definition at line 352 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 352 of file RKTrackRep.h

Referenced by RKutta().

M6x5 RKTrackRep::fJ_Mp_6x5

private

Definition at line 363 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 363 of file RKTrackRep.h

Referenced by initArrays(), and transformM6P().

M7x5 RKTrackRep::fJ_Mp_7x5

private

Definition at line 362 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 362 of file RKTrackRep.h

Referenced by initArrays(), and transformM7P().

M5x6 RKTrackRep::fJ_pM_5x6

private

Definition at line 361 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 361 of file RKTrackRep.h

Referenced by initArrays(), and transformPM6().

M5x7 RKTrackRep::fJ_pM_5x7

private

Definition at line 360 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 360 of file RKTrackRep.h

Referenced by initArrays(), and transformPM7().

double RKTrackRep::fMass

private

Mass (in GeV)

Definition at line 338 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 338 of file RKTrackRep.h

Referenced by setPDG().

M7x7 RKTrackRep::fNoise

private

Definition at line 357 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 357 of file RKTrackRep.h

Referenced by Extrap(), and initArrays().

bool RKTrackRep::fNoMaterial

private

Definition at line 333 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 333 of file RKTrackRep.h

Referenced by disableMaterialEffects(), estimateStep(), and Extrap().

TVector3 RKTrackRep::fO

private

Definition at line 348 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 348 of file RKTrackRep.h

Referenced by getState7().

M7x7 RKTrackRep::fOldCov

private

Definition at line 358 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 358 of file RKTrackRep.h

Referenced by Extrap().

int RKTrackRep::fPdg

private

PDG particle code.

Definition at line 336 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 336 of file RKTrackRep.h

Referenced by estimateStep(), Extrap(), getPDG(), and setPDG().

TVector3 RKTrackRep::fPos

private

Definition at line 349 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 349 of file RKTrackRep.h

Referenced by Extrap(), getState5(), and RKutta().

TVector3 RKTrackRep::fpTilde

private

Definition at line 350 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 350 of file RKTrackRep.h

Referenced by transformPM6(), and transformPM7().

double RKTrackRep::fSpu

private

Definition at line 344 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 344 of file RKTrackRep.h

Referenced by calcState(), extrapolate(), getPosMomCov(), getState7(), and setData().

M8x7 RKTrackRep::fStateJac

private

Definition at line 356 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 356 of file RKTrackRep.h

Referenced by Extrap(), and initArrays().

TVector3 RKTrackRep::fU

private

Definition at line 348 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 348 of file RKTrackRep.h

Referenced by calcStateCov(), getState5(), getState7(), transformM6P(), transformM7P(), transformPM6(), and transformPM7().

TVector3 RKTrackRep::fV

private

Definition at line 348 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 348 of file RKTrackRep.h

Referenced by calcStateCov(), getState5(), getState7(), transformM6P(), transformM7P(), transformPM6(), and transformPM7().

TVector3 RKTrackRep::fW

private

Definition at line 348 of file RKTrackRep.h.

View newest version in sPHENIX GitHub at line 348 of file RKTrackRep.h

Referenced by calcStateCov(), getState7(), transformM6P(), transformM7P(), transformPM6(), and transformPM7().

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

EicRoot/blob/master/GenfitTools/trackrep/RKTrackRep/RKTrackRep.h
EicRoot/blob/master/GenfitTools/trackrep/RKTrackRep/RKTrackRep.cxx

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