hephysics.particle

Class HEParticle

java.lang.Object

hephysics.vec.HepLorentzVector

hephysics.particle.LParticle

hephysics.particle.HEParticle

All Implemented Interfaces:

Serializable, Comparable<LParticle>

public class HEParticle
extends LParticle
implements Serializable

a HEP-type basic particle based on 4-Lorentz vector. It is characterized by status, particle code, and coordinate position in (X,Y,Z,time).

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
HEParticle(double px, double py, double pz) Define a 3-momentum for a given particle.
HEParticle(double px, double py, double pz, double energy) Define a particle in momentum space.
HEParticle(double px, double py, double pz, double energy, double mass) Define a 4-momentum and energy particle
HEParticle(HepLorentzVector momentum, HepLorentzVector position, double mass) Define a particle in momentum and position
HEParticle(String name, double mass) Define a particle with a name and mass
HEParticle(String name, double px, double py, double pz, double energy, double mass) Define a Lorentz particle in momentum space.

Method Summary

Modifier and Type	Method and Description
void	add(HEParticle another) Add 2 particles
void	boost(HEParticle parent) Lorentz Boost
HEParticle	copy() Make an exact copy of this particle
void	doc() Show online documentation.
int	getBarcode() Get barcode
float	getChargeParity() Returns C charge conjugation parity
float	getIsospin() Get isospin
LParticle	getLParticle() Returns a light-weight particle class
int	getPdgcode() Get PDG code
HepLorentzVector	getPosition() Get position in X,Y,Z,time
float	getSpaceparity() get P space parity
float	getSpin() Get J total spin
int	getStatus() Status Monte Carlo code
void	print() Print particle
double	rapidity() Compute rapidity.
void	setBarcode(int barcode) Set barcode ID
void	setChargeParity(float chargeparity) Set C charge conjugation parity
void	setIsospin(float isospin) Set isospin
void	setPdgcode(int pdgcode) Set PDG code
void	setPosition(HepLorentzVector position) Set position of particle in X,Y,Z,time.
void	setSpaceParity(float spaceparity) Set P space parity
void	setSpin(float spin) Set J total spin
void	setStatus(int status) Set Monte Carlo status code
String	toString() Convert to string
void	twoBodyDecay(HEParticle prod1, HEParticle prod2, boolean randomRotate) Evaluates 4-vector of decay product in the rest frame of parent.

Methods inherited from class hephysics.particle.LParticle

abs, add, angle, boost, calcMass, compareTo, dividePxPyPzE, getCharge, getMass, getName, getParent, getV3, hashCode, mass, scalePxPyPzE, scaleXYZT, setCharge, setMass, setParent, setPtEtaPhiE, setPtEtaPhiM, setPxPyPz, setPxPyPzE, setThetaPhiP, setXYZT, twoBodyDecay

Methods inherited from class hephysics.vec.HepLorentzVector

add, add, angle, boost, boost, boost, centerOfMass, cosTheta, dot, e, equals, et, et2, getE, getEta, getT, invariantMass, invariantMass2, isLightlike, isSpacelike, m, m2, mag, mag2, mt, mt2, mult, neg, neg, perp, perp2, phi, pseudoRapidity, px, py, pz, restMass2, setE, setPx, setPy, setPz, setT, setV3, setV3, setX, setY, setZ, skp, sub, t, theta, v3, x, y, z

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

HEParticle

public HEParticle(String name,
                  double mass)

Define a particle with a name and mass

Parameters:

name - particle name

mass - mass

HEParticle

public HEParticle(double px,
                  double py,
                  double pz)

Define a 3-momentum for a given particle. Energy is set to 0.

Parameters:

px - Px

py - Py

pz - Pz

HEParticle

public HEParticle(double px,
                  double py,
                  double pz,
                  double energy,
                  double mass)

Define a 4-momentum and energy particle

Parameters:

px - Px (or X position)

py - Py (or Y position)

pz - Pz (or Z position)

energy - energy (or time)

mass - mass

HEParticle

public HEParticle(HepLorentzVector momentum,
                  HepLorentzVector position,
                  double mass)

Define a particle in momentum and position

Parameters:

momentum - 4-momentum

position - postion in X,Y,Z,time

mass - mass

HEParticle

public HEParticle(double px,
                  double py,
                  double pz,
                  double energy)

Define a particle in momentum space. Mass is set to 0

Parameters:

px - Px or X position

py - Py or Y position

pz - Pz or Z position

energy - energy or time

HEParticle

public HEParticle(String name,
                  double px,
                  double py,
                  double pz,
                  double energy,
                  double mass)

Define a Lorentz particle in momentum space.

Parameters:

name - Name of particle

px - px (or X)

py - py (or Y)

pz - pz (or Z)

energy - energy or time

mass - mass

Method Detail

setPosition

public void setPosition(HepLorentzVector position)

Set position of particle in X,Y,Z,time.

Parameters:

position -

getPosition

public HepLorentzVector getPosition()

Get position in X,Y,Z,time

Returns:

rapidity

public double rapidity()

Compute rapidity. 0.5*log( (m+z)/(m-z) );

Overrides:

rapidity in class HepLorentzVector

Returns:

add

public void add(HEParticle another)

Add 2 particles

Parameters:

another - particle to be added

setIsospin

public void setIsospin(float isospin)

Set isospin

Parameters:

isospin -

getIsospin

public float getIsospin()

Get isospin

Returns:

setChargeParity

public void setChargeParity(float chargeparity)

Set C charge conjugation parity

Parameters:

chargeparity - charge parity

getChargeParity

public float getChargeParity()

Returns C charge conjugation parity

Returns:

setSpin

public void setSpin(float spin)

Set J total spin

Parameters:

spin -

getSpin

public float getSpin()

Get J total spin

Returns:

setPdgcode

public void setPdgcode(int pdgcode)

Set PDG code

Parameters:

pdgcode -

getPdgcode

public int getPdgcode()

Get PDG code

Returns:

setSpaceParity

public void setSpaceParity(float spaceparity)

Set P space parity

Parameters:

spaceparity -

getSpaceparity

public float getSpaceparity()

get P space parity

Returns:

getStatus

public int getStatus()

Status Monte Carlo code

Returns:

status

setStatus

public void setStatus(int status)

Set Monte Carlo status code

Parameters:

status -

getBarcode

public int getBarcode()

Get barcode

Returns:

barcode

setBarcode

public void setBarcode(int barcode)

Set barcode ID

Parameters:

barcode -

toString

public String toString()

Convert to string

Overrides:

toString in class LParticle

copy

public HEParticle copy()

Make an exact copy of this particle

Overrides:

copy in class LParticle

Returns:

new copy

getLParticle

public LParticle getLParticle()

Returns a light-weight particle class

Returns:

twoBodyDecay

public void twoBodyDecay(HEParticle prod1,
                         HEParticle prod2,
                         boolean randomRotate)

Evaluates 4-vector of decay product in the rest frame of parent.

Parameters:

prod1 - first decay product

prod2 - second decay product

randomRotate - is Phi randomly rotated?

boost

public void boost(HEParticle parent)

Lorentz Boost

Parameters:

parent - parent particle

print

public void print()

Print particle

Overrides:

print in class LParticle

doc

public void doc()

Show online documentation.

Overrides:

doc in class LParticle