hep.lcd.vertexing.zvtop
Class ZvTopParam

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

public class ZvTopParam

extends Object

ZvTopParam -- ZvTop's constant parameters

To be set before running ZvTop.

Version:

$Id: ZvTopParam.java,v 1.2 2001/06/05 18:20:57 walkowia Exp $

Author:

W.Walkowiak, 09/29/00

Source Code:

ZvTopParam.java

Constructor Summary

ZvTopParam()
constructor; provides default parameter settings

ZvTopParam(ZvTopParam tp)
copy constructor

Method Summary

ZvTopParam	copy() get a copy of this instance
double	getBackwardCutoff() get the backward cutoff for the tube list
double	getCang() get the weight vertex finding probabality currently set
double	getChi2TrackCut() get the current setting for the cut on the chi^2 contribution of a track to a vertex
double	getForwardCutoff() get the forward cutoff for the tube list
double	getIPWeight() get the IP weight currently set
double[]	getJetMomentum() get the currently set jet momentum
int	getMode() get the currently set lepton/high impact track mode
double	getPlaneWidth() get the gaussian width of plan currently set
double	getResolCut() get the currently set resolubility cut
double	getResolMin() get the currently set minimum resolubility for spatial points
int	getResolNSteps() get the currently set number of steps used to evaluate the resolution of spatial points
double	getTubeScaleFac() get the probabilty tube scale factor currently set
double	getVSigMin() get the minimum required vertex significance for a spatial point
double	getVSigMinFrac() set the minimum vertex significance fraction for a spatial point with respect to the maximum per track
double	guessDistMax() get the maximum distance cutoff for initial 2-track vertex guess
void	setBackwardCutoff(double cutoff) set the backward cutoff for the tube list default: -0.01 cm
void	setCang(double cang) set the weight vertex finding probability Weights the vertex finding probability by the factor exp(-cang*alpha^2) where alpha is the angle (in radians) between the line joining the IP to the 3d spatial coordinate and the jet axis.
void	setChi2TrackCut(double chi2TrackCut) set the cut on the chi^2 contribution of a track to a vertex default: 10.0
void	setForwardCutoff(double cutoff) set the forward cutoff for the tube list default: 10 cm
void	setGuessDistMax(double cutoff) set the maximum distance cutoff for initial 2-track vertex guess default: 4.0 cm
void	setIPWeight(double ipWeight) set the IP weight weights the significance of the IP, large values will tend to absorb nearby vertices/fakes into the primary vertex.
void	setJetMomentum(double[] pJet) set the jet momentum default: (0,0,0) -- take mean of track momenta
void	setMode(int mode) set lepton/high impact track mode 0 normal ZvTop 1 lepton or high impact track mode 2 like 1 but remove track for vertex finding 3 ...
void	setPlaneWidth(double planeWidth) set the gaussian width of plane for mode >= 1 in cm Default: 0.01
void	setResolCut(double resolCut) set resolubility cut can vary 0.0 < resolCut < 1.0 larger values produce more vertices default: 0.6
void	setResolMin(double resolMin) set minimum resolubility for spatial points smaller values may produce more vertices default: 10 um
void	setResolNSteps(int resolNSteps) set number of steps used to evaluate the resolution of spatial points default: 16
void	setTubeScaleFac(double factor) set probablity tube scale factor factor = 0.0 -- use constant tube width factor = 1.0 -- use track swim errors for the probabilty tubes (parabolic approximation) factor > 0.0 -- multiply swam track tube by this factor factor < 0 -- mulltiply non-swam track by abs(factor) Default: 0.0
void	setUseJetAxis(boolean useJetAxis) if true, use jet momentum vector of vertex originating at beam spot as axis for the calculation of track's transverse and longitudinal distance from decay, use axis between beam spot and the vertex furthest out. default: false
void	setUseStrongBeamSpot(boolean useStrongBeamSpot) Use a strong beamspot constraint: -- use beamspot constraint in final track fit, if vertex contains beamspot -- use beamspot position/error martrix for vertex with beamspot but without any tracks default: false (usual ZVTOP3 behavior)
void	setVSigMin(double vSigMin) set the minimum required vertex significance for a spatial point default: 0.001
void	setVSigMinFrac(double fraction) set the minimum vertex significance fraction for a spatial point with respect to the maximum per track default: 0.10
boolean	useJetAxis() setting for useJetAxis
boolean	useStrongBeamSpot() Get the setting for the use of a strong beam spot constraint.

Methods inherited from class java.lang.Object

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

Constructor Detail

ZvTopParam

public ZvTopParam()

constructor; provides default parameter settings

ZvTopParam

public ZvTopParam(ZvTopParam tp)

copy constructor

Method Detail

setJetMomentum

public void setJetMomentum(double[] pJet)

set the jet momentum
default: (0,0,0) -- take mean of track momenta

getJetMomentum

public double[] getJetMomentum()

get the currently set jet momentum

setMode

public void setMode(int mode)

set lepton/high impact track mode

getMode

public int getMode()

get the currently set lepton/high impact track mode

setResolCut

public void setResolCut(double resolCut)

set resolubility cut
can vary 0.0 < resolCut < 1.0
larger values produce more vertices
default: 0.6

getResolCut

public double getResolCut()

get the currently set resolubility cut

setResolMin

public void setResolMin(double resolMin)

set minimum resolubility for spatial points
smaller values may produce more vertices
default: 10 um

getResolMin

public double getResolMin()

get the currently set minimum resolubility for spatial points

setResolNSteps

public void setResolNSteps(int resolNSteps)

set number of steps used to evaluate the resolution of spatial points
default: 16

getResolNSteps

public int getResolNSteps()

get the currently set number of steps used to evaluate the resolution of spatial points

setChi2TrackCut

public void setChi2TrackCut(double chi2TrackCut)

set the cut on the chi^2 contribution of a track to a vertex
default: 10.0

getChi2TrackCut

public double getChi2TrackCut()

get the current setting for the cut on the chi^2 contribution of a track to a vertex

setCang

public void setCang(double cang)

set the weight vertex finding probability
Weights the vertex finding probability by the factor exp(-cang*alpha^2) where alpha is the angle (in radians) between the line joining the IP to the 3d spatial coordinate and the jet axis. (Positive values ~10 increase vertex finding efficiency in the core of the jet.)
Default: 5.0

getCang

public double getCang()

get the weight vertex finding probabality currently set

setPlaneWidth

public void setPlaneWidth(double planeWidth)

set the gaussian width of plane for mode >= 1 in cm
Default: 0.01

getPlaneWidth

public double getPlaneWidth()

get the gaussian width of plan currently set

setIPWeight

public void setIPWeight(double ipWeight)

set the IP weight
weights the significance of the IP, large values will tend to absorb nearby vertices/fakes into the primary vertex.
Default: 1.0

getIPWeight

public double getIPWeight()

get the IP weight currently set

setUseStrongBeamSpot

public void setUseStrongBeamSpot(boolean useStrongBeamSpot)

Use a strong beamspot constraint:
-- use beamspot constraint in final track fit, if vertex contains beamspot
-- use beamspot position/error martrix for vertex with beamspot but without any tracks
default: false (usual ZVTOP3 behavior)

useStrongBeamSpot

public boolean useStrongBeamSpot()

Get the setting for the use of a strong beam spot constraint.

See Also:

setUseStrongBeamSpot(boolean)

setTubeScaleFac

public void setTubeScaleFac(double factor)

set probablity tube scale factor
factor = 0.0 -- use constant tube width
factor = 1.0 -- use track swim errors for the probabilty tubes (parabolic approximation)
factor > 0.0 -- multiply swam track tube by this factor
factor < 0 -- mulltiply non-swam track by abs(factor)
Default: 0.0

getTubeScaleFac

public double getTubeScaleFac()

get the probabilty tube scale factor currently set

setForwardCutoff

public void setForwardCutoff(double cutoff)

set the forward cutoff for the tube list
default: 10 cm

getForwardCutoff

public double getForwardCutoff()

get the forward cutoff for the tube list

setBackwardCutoff

public void setBackwardCutoff(double cutoff)

set the backward cutoff for the tube list
default: -0.01 cm

getBackwardCutoff

public double getBackwardCutoff()

get the backward cutoff for the tube list

setGuessDistMax

public void setGuessDistMax(double cutoff)

set the maximum distance cutoff for initial 2-track vertex guess
default: 4.0 cm

guessDistMax

public double guessDistMax()

get the maximum distance cutoff for initial 2-track vertex guess

setVSigMin

public void setVSigMin(double vSigMin)

set the minimum required vertex significance for a spatial point
default: 0.001

getVSigMin

public double getVSigMin()

get the minimum required vertex significance for a spatial point

setVSigMinFrac

public void setVSigMinFrac(double fraction)

set the minimum vertex significance fraction for a spatial point with respect to the maximum per track
default: 0.10

getVSigMinFrac

public double getVSigMinFrac()

set the minimum vertex significance fraction for a spatial point with respect to the maximum per track

setUseJetAxis

public void setUseJetAxis(boolean useJetAxis)

if true, use jet momentum vector of vertex originating at beam spot as axis for the calculation of track's transverse and longitudinal distance from decay,
use axis between beam spot and the vertex furthest out.
default: false

useJetAxis

public boolean useJetAxis()

setting for useJetAxis

See Also:

setUseJetAxis(boolean)

copy

public ZvTopParam copy()

get a copy of this instance