hep.lcd.mc.fast
Class ReconTrack

java.lang.Object
  |
  +--hep.lcd.mc.fast.ReconTrack

public final class ReconTrack

extends Object

implements Track, Serializable

Provides MC smeared track.
Handles to smeared and not-smeared set of DocaTrackParameters are provided.
Updated to run with track curvature flipping (optional flag for MCFast).

Version:

$Id: ReconTrack.java,v 1.5 2001/06/18 22:39:12 walkowia Exp $

Author:

Tony Johnson, Wolfgang Walkowiak

See Also:

Serialized Form

Source Code:

ReconTrack.java

Field Summary

static int	FLIPPED
static int	NOTFLIPPED

Method Summary

double[][]	calcMomentumErrorMatrix(double l) Calculate the error matrix for the momentum for a point on the smeared track specified by l.
double[][]	calcPositionErrorMatrix(double l) Calculate the error matrix for the position coordinates for a point on the smeared track specified by l.
double	cosTheta() Get cos(theta) at DOCA.
boolean	fitSuccess() This method is not yet implemented.
int	getCharge() Get the full charge.
double	getChi2() Get the chi2 from smearing.
double	getCosTheta() Get cos(theta) at DOCA.
double[]	getDoca() Get DOCA (2-dim) of smeared track.
double[]	getDocaMomentum() Get momentum at DOCA (2-dim) of smeared track.
double[]	getDocaMomentum(double[] refPoint)
Hep3Vector	getDocaMomentumVec(double[] refPoint)
Hep3Vector	getDocaMomentumVec(Hep3Vector refPoint)
double	getDocaMomentumX() Get x coordinate of momentum of the smeared track at DOCA.
double	getDocaMomentumY() Get y coordinate of momentum of the smeared track at DOCA.
double	getDocaMomentumZ() Get z coordinate of momentum of the smeared track at DOCA.
double[]	getDocaPosition(double[] refPoint)
Hep3Vector	getDocaPositionVec(double[] refPoint)
Hep3Vector	getDocaPositionVec(Hep3Vector refPoint) Calculate and get Doca position on the smeared track with respect to any space point.
double	getDocaPt() Get transverse momentum of the smeared track at DOCA.
double	getDocaTransversePathLength(double[] refPoint)
double	getDocaTransversePathLength(Hep3Vector refPoint) Calculate and get path length on the smeared track for a doca to any space point in respect to the track defining doca (with respect to the origin).
double	getDocaX() Get x coordinate of DOCA of smeared track.
double	getDocaY() Get y coordinate of DOCA of smeared track.
double	getDocaZ() Get z coordinate of DOCA of smeared track.
double[][]	getErrorMatrix() Get the full error matrix.
double	getErrorMatrixElement(int i, int j) Get an individual error matrix element.
MCParticle	getMCParticle() Get the MC particle for this track.
double[]	getMomentum() Get momentum of smeared track at original vertex point.
double[]	getMomentum(double l)
Hep3Vector	getMomentumVec(double l) Calculate and get momentum on track with respect to any path length l on track (l in xy plane).
double	getMomentumX() Get x coordinate of momentum of the smeared track at original vertex.
double	getMomentumY() Get y coordinate of momentum of the smeared track at original vertex.
double	getMomentumZ() Get z coordinate of momentum of the smeared track at original vertex.
double	getNDF() Get the number degrees of freedom.
DocaTrackParameters	getNotSmearedTrack() Get the complete parameter set for the not smeared track.
double[]	getOrigin() Get the original vertex point of smeared MC track.
double	getOriginX() Get x coordinate of the original vertex point of smeared MC track.
double	getOriginY() Get y coordinate of the original vertex point of smeared MC track.
double	getOriginZ() Get z coordinate of the original vertex point of smeared MC track.
double[]	getPosition(double l)
Hep3Vector	getPositionVec(double l) Calculate and get position on track with respect to any path length l on track (l in xy plane).
double	getPt() Get transverse momentum of the smeared track at original vertex.
double	getPX() Get x coordinate of momentum of the smeared track at original vertex.
double	getPY() Get y coordinate of momentum of the smeared track at original vertex.
double	getPZ() Get z coordinate of momentum of the smeared track at original vertex.
DocaTrackParameters	getSmearedTrack() Get the complete parameter set for the smeared track.
double	getTrackParameter(int i) Get an individual track parameter.
double[]	getTrackParameters() Get the track parameters as an array
boolean	isFlipped() Check whether this track has been curvature flipped.
double	mag() Unsigned distance of DOCA from origin.
double	mag2() Square of distance of DOCA from origin.
double[]	v() array of coordinates at DOCA for smeared track.
double	x() x coordinate at DOCA for smeared track.
double	y() y coordinate at DOCA for smeared track.
double	z() z coordinate at DOCA for smeared track.

Methods inherited from class java.lang.Object

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

Field Detail

NOTFLIPPED

public static final int NOTFLIPPED

FLIPPED

public static final int FLIPPED

Method Detail

getDocaPositionVec

public Hep3Vector getDocaPositionVec(Hep3Vector refPoint)

Calculate and get Doca position on the smeared track with respect to any space point.

getDocaPositionVec

public Hep3Vector getDocaPositionVec(double[] refPoint)

getDocaPosition

public double[] getDocaPosition(double[] refPoint)

getDocaMomentumVec

public Hep3Vector getDocaMomentumVec(Hep3Vector refPoint)

getDocaMomentumVec

public Hep3Vector getDocaMomentumVec(double[] refPoint)

getDocaMomentum

public double[] getDocaMomentum(double[] refPoint)

getPositionVec

public Hep3Vector getPositionVec(double l)

Calculate and get position on track with respect to any path length l on track (l in xy plane).

getPosition

public double[] getPosition(double l)

getMomentumVec

public Hep3Vector getMomentumVec(double l)

Calculate and get momentum on track with respect to any path length l on track (l in xy plane).

getMomentum

public double[] getMomentum(double l)

getDocaTransversePathLength

public double getDocaTransversePathLength(Hep3Vector refPoint)

Calculate and get path length on the smeared track for a doca to any space point in respect to the track defining doca (with respect to the origin). The length l is given in the transverse plane.
Use L = l*tan(lambda) to convert.

getDocaTransversePathLength

public double getDocaTransversePathLength(double[] refPoint)

calcPositionErrorMatrix

public double[][] calcPositionErrorMatrix(double l)

Calculate the error matrix for the position coordinates for a point on the smeared track specified by l. Result is given as a 3x3 array for the matrix.

calcMomentumErrorMatrix

public double[][] calcMomentumErrorMatrix(double l)

Calculate the error matrix for the momentum for a point on the smeared track specified by l. Result is given as a 3x3 array for the matrix.

getCharge

public int getCharge()

Get the full charge.

Specified by:

getCharge in interface Track

getOrigin

public double[] getOrigin()

Get the original vertex point of smeared MC track.

Specified by:

getOrigin in interface Track

getOriginX

public double getOriginX()

Get x coordinate of the original vertex point of smeared MC track.

Specified by:

getOriginX in interface Track

getOriginY

public double getOriginY()

Get y coordinate of the original vertex point of smeared MC track.

Specified by:

getOriginY in interface Track

getOriginZ

public double getOriginZ()

Get z coordinate of the original vertex point of smeared MC track.

Specified by:

getOriginZ in interface Track

getDoca

public double[] getDoca()

Get DOCA (2-dim) of smeared track.
Note: Use #getNotSmearedTrack().getDOCA() to access parameters of the not smeared track.

getDocaX

public double getDocaX()

Get x coordinate of DOCA of smeared track.

getDocaY

public double getDocaY()

Get y coordinate of DOCA of smeared track.

getDocaZ

public double getDocaZ()

Get z coordinate of DOCA of smeared track.

getMomentum

public double[] getMomentum()

Get momentum of smeared track at original vertex point.
Note: Use #getNotSmearedTrack().getMomentum() to access parameters of the not smeared track.

Specified by:

getMomentum in interface Track

getDocaMomentum

public double[] getDocaMomentum()

Get momentum at DOCA (2-dim) of smeared track.
Note: Use #getNotSmearedTrack().getMomentum() to access parameters of the not smeared track.

getPt

public double getPt()

Get transverse momentum of the smeared track at original vertex.

getDocaPt

public double getDocaPt()

Get transverse momentum of the smeared track at DOCA.

getMomentumX

public double getMomentumX()

Get x coordinate of momentum of the smeared track at original vertex.

Specified by:

getMomentumX in interface Track

getMomentumY

public double getMomentumY()

Get y coordinate of momentum of the smeared track at original vertex.

Specified by:

getMomentumY in interface Track

getMomentumZ

public double getMomentumZ()

Get z coordinate of momentum of the smeared track at original vertex.

Specified by:

getMomentumZ in interface Track

getPX

public double getPX()

Get x coordinate of momentum of the smeared track at original vertex.

Specified by:

getPX in interface Track

getPY

public double getPY()

Get y coordinate of momentum of the smeared track at original vertex.

Specified by:

getPY in interface Track

getPZ

public double getPZ()

Get z coordinate of momentum of the smeared track at original vertex.

Specified by:

getPZ in interface Track

getDocaMomentumX

public double getDocaMomentumX()

Get x coordinate of momentum of the smeared track at DOCA.

getDocaMomentumY

public double getDocaMomentumY()

Get y coordinate of momentum of the smeared track at DOCA.

getDocaMomentumZ

public double getDocaMomentumZ()

Get z coordinate of momentum of the smeared track at DOCA.

getCosTheta

public double getCosTheta()

Get cos(theta) at DOCA.

getErrorMatrixElement

public double getErrorMatrixElement(int i,
                                    int j)

Get an individual error matrix element.

Specified by:

getErrorMatrixElement in interface Track

See Also:

getTrackParameter(int)

getErrorMatrix

public double[][] getErrorMatrix()

Get the full error matrix.

Specified by:

getErrorMatrix in interface Track

See Also:

getTrackParameter(int)

getTrackParameter

public double getTrackParameter(int i)

Get an individual track parameter.
The track parameters for LCD are defined as follows

Index	Meaning
0	d0 = XY impact parameter
1	phi0
2	omega = 1/curv.radius (negative for negative tracks)
3	z0 = z of track (z impact parameter)
4	s = tan lambda

Specified by:

getTrackParameter in interface Track

Parameters:

i - The index of the track parameter

Returns:

The track parameter with the specified index All parameters are given at the DOCA.

getTrackParameters

public double[] getTrackParameters()

Get the track parameters as an array

Specified by:

getTrackParameters in interface Track

See Also:

getTrackParameter(int)

getChi2

public double getChi2()

Get the chi2 from smearing.

Specified by:

getChi2 in interface Track

Following copied from interface: hep.lcd.event.Track

Returns:

Chi Squared

See Also:

Track.getNDF()

getNDF

public double getNDF()

Get the number degrees of freedom.

Specified by:

getNDF in interface Track

Following copied from interface: hep.lcd.event.Track

Returns:

The number of degrees of freedom

See Also:

Track.getChi2()

getMCParticle

public MCParticle getMCParticle()

Get the MC particle for this track.

Specified by:

getMCParticle in interface Track

getSmearedTrack

public DocaTrackParameters getSmearedTrack()

Get the complete parameter set for the smeared track.

getNotSmearedTrack

public DocaTrackParameters getNotSmearedTrack()

Get the complete parameter set for the not smeared track.

fitSuccess

public boolean fitSuccess()

This method is not yet implemented.

Specified by:

fitSuccess in interface Track

x

public double x()

x coordinate at DOCA for smeared track.

Specified by:

x in interface Hep3Vector

y

public double y()

y coordinate at DOCA for smeared track.

Specified by:

y in interface Hep3Vector

z

public double z()

z coordinate at DOCA for smeared track.

Specified by:

z in interface Hep3Vector

v

public double[] v()

array of coordinates at DOCA for smeared track.

Specified by:

v in interface Hep3Vector

mag

public double mag()

Unsigned distance of DOCA from origin.

Specified by:

mag in interface Hep3Vector

mag2

public double mag2()

Square of distance of DOCA from origin.

Specified by:

mag2 in interface Hep3Vector

cosTheta

public double cosTheta()

Get cos(theta) at DOCA.
Note: Same as getCosTheta();

Specified by:

cosTheta in interface Hep3Vector

isFlipped

public boolean isFlipped()

Check whether this track has been curvature flipped.