TwoTrackMinimumDistanceHelixLine Class Reference

#include <TwoTrackMinimumDistanceHelixLine.h>

Public Member Functions
bool	calculate (const GlobalTrajectoryParameters &, const GlobalTrajectoryParameters &, const float qual=.0001)
double	firstAngle () const
std::pair< double, double >	pathLength () const
std::pair< GlobalPoint, GlobalPoint >	points () const
double	secondAngle () const
	TwoTrackMinimumDistanceHelixLine ()
	~TwoTrackMinimumDistanceHelixLine ()

Private Member Functions
void	finalPoints () const
bool	oneIteration (double &thePhiH, double &fct, double &derivative) const
bool	updateCoeffs ()

Private Attributes
double	aa
double	baseDer
double	baseFct
double	bb
double	cc
double	dd
double	ee
double	ff
GlobalTrajectoryParameters *	firstGTP
double	helixPath
GlobalPoint	helixPoint
double	Hn
double	linePath
GlobalPoint	linePoint
double	Ln
bool	pointsUpdated
GlobalVector	posDiff
double	px
double	px2
double	py
double	py2
double	pz
double	pz2
GlobalTrajectoryParameters *	secondGTP
double	thecosPhiH0
GlobalTrajectoryParameters *	theH
double	theh
GlobalTrajectoryParameters *	theL
GlobalVector	theLp
int	themaxiter
double	thePhiH
double	thePhiH0
double	thesinPhiH0
double	thetanlambdaH
double	tL
double	X
double	Y
double	Z

Detailed Description

This is a helper class for TwoTrackMinimumDistance, for the case where one of the tracks is charged and the other not. No user should need direct access to this class. It implements a Newton method for finding the minimum distance between two tracks.

Definition at line 17 of file TwoTrackMinimumDistanceHelixLine.h.

Constructor & Destructor Documentation

TwoTrackMinimumDistanceHelixLine::TwoTrackMinimumDistanceHelixLine ( )

inline

Definition at line 21 of file TwoTrackMinimumDistanceHelixLine.h.

                                    : theH(0), theL(0), themaxiter(12),
    pointsUpdated(false){}

TwoTrackMinimumDistanceHelixLine::~TwoTrackMinimumDistanceHelixLine ( )

inline

Definition at line 23 of file TwoTrackMinimumDistanceHelixLine.h.

{}

Member Function Documentation

bool TwoTrackMinimumDistanceHelixLine::calculate	(	const GlobalTrajectoryParameters &	theFirstGTP,
		const GlobalTrajectoryParameters &	theSecondGTP,
		const float	qual = .0001
	)

Calculates the PCA between a charged particle (helix) and a neutral particle (line). The order of the trajectories (helix-line or line-helix) is irrelevent, and will be conserved.

Definition at line 113 of file TwoTrackMinimumDistanceHelixLine.cc.

void TwoTrackMinimumDistanceHelixLine::finalPoints ( ) const

private

Definition at line 175 of file TwoTrackMinimumDistanceHelixLine.cc.

double TwoTrackMinimumDistanceHelixLine::firstAngle

(

)

const

Definition at line 146 of file TwoTrackMinimumDistanceHelixLine.cc.

bool TwoTrackMinimumDistanceHelixLine::oneIteration ( double &  thePhiH, double &  fct, double &  derivative  ) const

private

Definition at line 80 of file TwoTrackMinimumDistanceHelixLine.cc.

pair< double, double > TwoTrackMinimumDistanceHelixLine::pathLength

(

)

const

Definition at line 167 of file TwoTrackMinimumDistanceHelixLine.cc.

pair< GlobalPoint, GlobalPoint > TwoTrackMinimumDistanceHelixLine::points

(

)

const

Returns the PCA's on the two trajectories. The first point lies on the first trajectory, the second point on the second trajectory.

Definition at line 158 of file TwoTrackMinimumDistanceHelixLine.cc.

double TwoTrackMinimumDistanceHelixLine::secondAngle

(

)

const

Definition at line 152 of file TwoTrackMinimumDistanceHelixLine.cc.

bool TwoTrackMinimumDistanceHelixLine::updateCoeffs ( )

private

Definition at line 10 of file TwoTrackMinimumDistanceHelixLine.cc.

Member Data Documentation

double TwoTrackMinimumDistanceHelixLine::aa

private

Definition at line 55 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::baseDer

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::baseFct

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::bb

private

Definition at line 55 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::cc

private

Definition at line 55 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::dd

private

Definition at line 55 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::ee

private

Definition at line 55 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::ff

private

Definition at line 55 of file TwoTrackMinimumDistanceHelixLine.h.

GlobalTrajectoryParameters * TwoTrackMinimumDistanceHelixLine::firstGTP

private

Definition at line 48 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::helixPath

mutableprivate

Definition at line 62 of file TwoTrackMinimumDistanceHelixLine.h.

GlobalPoint TwoTrackMinimumDistanceHelixLine::helixPoint

mutableprivate

Definition at line 61 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::Hn

private

Definition at line 54 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::linePath

mutableprivate

Definition at line 62 of file TwoTrackMinimumDistanceHelixLine.h.

GlobalPoint TwoTrackMinimumDistanceHelixLine::linePoint

mutableprivate

Definition at line 61 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::Ln

private

Definition at line 54 of file TwoTrackMinimumDistanceHelixLine.h.

bool TwoTrackMinimumDistanceHelixLine::pointsUpdated

mutableprivate

Definition at line 63 of file TwoTrackMinimumDistanceHelixLine.h.

GlobalVector TwoTrackMinimumDistanceHelixLine::posDiff

private

Definition at line 49 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::px

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::px2

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::py

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::py2

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::pz

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::pz2

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.

GlobalTrajectoryParameters * TwoTrackMinimumDistanceHelixLine::secondGTP

private

Definition at line 48 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::thecosPhiH0

private

Definition at line 52 of file TwoTrackMinimumDistanceHelixLine.h.

GlobalTrajectoryParameters* TwoTrackMinimumDistanceHelixLine::theH

private

Definition at line 48 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::theh

private

Definition at line 52 of file TwoTrackMinimumDistanceHelixLine.h.

GlobalTrajectoryParameters * TwoTrackMinimumDistanceHelixLine::theL

private

Definition at line 48 of file TwoTrackMinimumDistanceHelixLine.h.

GlobalVector TwoTrackMinimumDistanceHelixLine::theLp

private

Definition at line 50 of file TwoTrackMinimumDistanceHelixLine.h.

int TwoTrackMinimumDistanceHelixLine::themaxiter

private

Definition at line 57 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::thePhiH

private

Definition at line 53 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::thePhiH0

private

Definition at line 52 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::thesinPhiH0

private

Definition at line 52 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::thetanlambdaH

private

Definition at line 52 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::tL

mutableprivate

Definition at line 62 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::X

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::Y

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.

double TwoTrackMinimumDistanceHelixLine::Z

private

Definition at line 51 of file TwoTrackMinimumDistanceHelixLine.h.