hephysics.jet

Class ParticleF

java.lang.Object

hephysics.jet.ParticleF

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<ParticleF>

public class ParticleF
extends java.lang.Object
implements java.lang.Comparable<ParticleF>, java.io.Serializable

A class representing a jet or particle with pre-computed et, et2, phi, eta (float values). It uses floats to speedup calculations for jet fundings. The class is used by light-weight hephysics.jets.KTjet algorithm. "F" means float calculations The class has a minimum dynamic computation to minimize CPU. Use LParticle for (slower) dynamic calculations. To use double precision calculations, use hephysics.jets.ParticleD class.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ParticleF() Initialize pseudoparticle.
ParticleF(float px, float py, float pz, float energy) Initialize fast particle from 4-momenta.
ParticleF(LParticle p) Initialize pseudoparticle.

Method Summary

Modifier and Type	Method and Description
void	add(ParticleF a) Add to this particle and recalculate all characteristics.
int	compareTo(ParticleF o) Comparator.
void	doc() Show online documentation.
float	eta() Same as getEta().
float	getEt()
float	getEt2()
float	getEta()
LParticle	getLParticle()
float	getPhi()
int	hashCode() Get a hash code
float	perp() Same as getEt().
void	setEt2(float et2)
void	setEta(float eta)
void	setPhi(float phi)
void	setPxPyPzE(float px, float py, float pz, float energy) Initialize from 4-momenta.
java.lang.String	toString() Convert a particle to a string.

Methods inherited from class java.lang.Object

equals, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ParticleF

public ParticleF(LParticle p)

Initialize pseudoparticle.

Parameters:

p - initialisation particle.

ParticleF

public ParticleF()

Initialize pseudoparticle.

ParticleF

public ParticleF(float px,
                 float py,
                 float pz,
                 float energy)

Initialize fast particle from 4-momenta. The methods precomputes internal variables et, et, phi, eta.

Parameters:

px -

py -

pz -

energy -

Method Detail

setPxPyPzE

public void setPxPyPzE(float px,
                       float py,
                       float pz,
                       float energy)

Initialize from 4-momenta. Recompute et2, et, eta, and phi.

Parameters:

px -

py -

pz -

energy -

getEta

public float getEta()

getPhi

public float getPhi()

getEt2

public float getEt2()

getEt

public float getEt()

perp

public float perp()

Same as getEt(). Returns perp without calculations.

eta

public float eta()

Same as getEta(). Returns pseudo-rapidity without calculations.

setEta

public void setEta(float eta)

setEt2

public void setEt2(float et2)

setPhi

public void setPhi(float phi)

getLParticle

public LParticle getLParticle()

compareTo

public int compareTo(ParticleF o)

Comparator. using perp2 for comparison (in increasing order)

Specified by:

compareTo in interface java.lang.Comparable<ParticleF>

Parameters:

o -

Returns:

doc

public void doc()

Show online documentation.

toString

public java.lang.String toString()

Convert a particle to a string.

Overrides:

toString in class java.lang.Object

Returns:

a string with the particle

add

public void add(ParticleF a)

Add to this particle and recalculate all characteristics.

Parameters:

a -

hashCode

public int hashCode()

Get a hash code

Overrides:

hashCode in class java.lang.Object