hep.lcd.vertexing.zvtop
Class ZvProbTube

java.lang.Object
  |
  +--hep.lcd.vertexing.zvtop.ZvProbTube

public class ZvProbTube

extends Object

ZvProbTube -- probablity tube approximation for a ZvTrack

Hold the gaussian probabilty tube approximation for a ZvTrack.
Calculate the probability density at a given point.

Version:

$Id: ZvProbTube.java,v 1.2 2001/06/05 18:20:56 walkowia Exp $

Author:

W.Walkowiak, 09/21/00

Source Code:

ZvProbTube.java

Constructor Summary

ZvProbTube()
constructor without initialization
to be used, if scale factor change is desired initially

ZvProbTube(Swimmer swimmer)

ZvProbTube(ZvProbTube tube)
copy constructor

ZvProbTube(ZvTrack track)

ZvProbTube(ZvTrack track, double[] refPoint)

ZvProbTube(ZvTrack track, double[] refPoint, double scaleFac)

ZvProbTube(ZvTrack track, double[] refPoint, Swimmer swimmer, double scaleFac)

Method Summary

double[]	cKsi() get the approximation coefficients in ksi direction
ZvProbTube	copy() provide a deep copy (track as handle, though)
double	cosN() get the cosine of normal vector to momentum in xy plane
double[]	cZ() get the approximation coefficients in z direction
double	getTubeScaling() report the 'scaling' factor for tube coefficients
void	initTube(ZvTrack track) initialize the tube with a track; use default reference point (origin)
void	initTube(ZvTrack inTrack, double[] refPoint) initialize the tube with a track; use reference point; calculate quadratic approximation of probability tube: error = c0 + c1 * y + c2 * y*y where y is the travelled distance in track direction
void	initTube(ZvTrack track, double[] refPoint, double scaleFac) initialize the tube with a track; use reference point; calculate quadratic approximation of probability tube: error = c0 + c1 * y + c2 * y*y where y is the travelled distance in track direction
double	omkap() get omkap = sgn(q)*Bz*kappa/333.567 -- this is neither full omega, nor a true kappa ...
double	prob(double[] xc) get the probablity density at point x_c
void	setSwimmer(Swimmer swimmer) set the Swimmer to be used default: ZvSwimmer (with it's default settings)
void	setTubeScaling(double scaleFac) set the 'scaling' factor for tube coefficients fac = 1. : no scaling fac > 0. : scaling with fac fac = 0. : only constant approximation, no scaling fac < 0. : only constant approximation, scaling with abs(fac)
double	sinN() get the sine of normal vector to momentum in xy plane
double	sKsi2AtTp() get sigma(ksi)^2 at initial track point
Swimmer	swimmer() get a handle to the swimmer used
ZvSwimStatus	swimStatus() get the status of the swimming done
double	sZ2AtTp() get sigma(z)^2 at initial track point
double	tanL() get tan(lambda)
ZvTrack	track() get handle to track for this probabilty tube
double	x0p() get the distance x0p along normal vector in xy (presumably to IP)
double[]	xRef() get reference point, which was used
double	z0() get the z0 (presumably to IP)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ZvProbTube

public ZvProbTube()

constructor without initialization
to be used, if scale factor change is desired initially

ZvProbTube

public ZvProbTube(Swimmer swimmer)

See Also:

setSwimmer(hep.lcd.vertexing.zvtop.Swimmer)

ZvProbTube

public ZvProbTube(ZvTrack track)

See Also:

initTube(hep.lcd.vertexing.zvtop.ZvTrack)

ZvProbTube

public ZvProbTube(ZvTrack track,
                  double[] refPoint)

See Also:

initTube(hep.lcd.vertexing.zvtop.ZvTrack)

ZvProbTube

public ZvProbTube(ZvTrack track,
                  double[] refPoint,
                  double scaleFac)

See Also:

initTube(hep.lcd.vertexing.zvtop.ZvTrack)

ZvProbTube

public ZvProbTube(ZvTrack track,
                  double[] refPoint,
                  Swimmer swimmer,
                  double scaleFac)

See Also:

setSwimmer(hep.lcd.vertexing.zvtop.Swimmer), initTube(hep.lcd.vertexing.zvtop.ZvTrack)

ZvProbTube

public ZvProbTube(ZvProbTube tube)

copy constructor

Method Detail

setSwimmer

public void setSwimmer(Swimmer swimmer)

set the Swimmer to be used
default: ZvSwimmer (with it's default settings)

swimmer

public Swimmer swimmer()

get a handle to the swimmer used

initTube

public void initTube(ZvTrack track)

initialize the tube with a track; use default reference point (origin)

initTube

public void initTube(ZvTrack track,
                     double[] refPoint,
                     double scaleFac)

initialize the tube with a track; use reference point;
calculate quadratic approximation of probability tube:
error = c0 + c1 * y + c2 * y*y
where y is the travelled distance in track direction

initTube

public void initTube(ZvTrack inTrack,
                     double[] refPoint)

initialize the tube with a track; use reference point;
calculate quadratic approximation of probability tube:
error = c0 + c1 * y + c2 * y*y
where y is the travelled distance in track direction

setTubeScaling

public void setTubeScaling(double scaleFac)

set the 'scaling' factor for tube coefficients

fac =	1.	: no scaling
fac >	0.	: scaling with fac
fac =	0.	: only constant approximation, no scaling
fac <	0.	: only constant approximation, scaling with abs(fac)

getTubeScaling

public double getTubeScaling()

report the 'scaling' factor for tube coefficients

See Also:

setTubeScaling(double)

prob

public double prob(double[] xc)

get the probablity density at point x_c

Parameters:

xc - -- 3 dimensional point

Throws:

ZvException - if tube is not initialized

swimStatus

public ZvSwimStatus swimStatus()

get the status of the swimming done

cKsi

public double[] cKsi()

get the approximation coefficients in ksi direction

See Also:

initTube(hep.lcd.vertexing.zvtop.ZvTrack)

cZ

public double[] cZ()

get the approximation coefficients in z direction

See Also:

initTube(hep.lcd.vertexing.zvtop.ZvTrack)

cosN

public double cosN()

get the cosine of normal vector to momentum in xy plane

sinN

public double sinN()

get the sine of normal vector to momentum in xy plane

z0

public double z0()

get the z0 (presumably to IP)

x0p

public double x0p()

get the distance x0p along normal vector in xy (presumably to IP)

omkap

public double omkap()

get omkap = sgn(q)*Bz*kappa/333.567
-- this is neither full omega, nor a true kappa ...

tanL

public double tanL()

get tan(lambda)

sKsi2AtTp

public double sKsi2AtTp()

get sigma(ksi)^2 at initial track point

sZ2AtTp

public double sZ2AtTp()

get sigma(z)^2 at initial track point

xRef

public double[] xRef()

get reference point, which was used

track

public ZvTrack track()

get handle to track for this probabilty tube

copy

public ZvProbTube copy()

provide a deep copy (track as handle, though)