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JSci is a set of open source Java packages. The aim is to encapsulate scientific methods/principles in the most natural way possible. As such they should greatly aid the development of scientific based software.
It offers: abstract math interfaces, linear algebra (support for various matrix and vector types), statistics (including probability distributions), wavelets, newtonian mechanics, chart/graph components (AWT and Swing), MathML DOM implementation, ...
Note: some packages, like javax.comm, for the astro and instruments package aren't listed as dependencies (not available).
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package JSci.physics.particles;
import JSci.physics.quantum.QuantumParticle;
/**
* A class representing antitau neutrinos.
* @version 1.5
* @author Mark Hale
*/
public final class AntiTauNeutrino extends AntiLepton {
/**
* Constructs an antitau neutrino.
*/
public AntiTauNeutrino() {}
/**
* Returns the rest mass (MeV).
* @return 0.0
*/
public double restMass() {return 0.0;}
/**
* Returns the electric charge.
* @return 0
*/
public int charge() {return 0;}
/**
* Returns the electron lepton number.
* @return 0
*/
public int eLeptonQN() {return 0;}
/**
* Returns the muon lepton number.
* @return 0
*/
public int muLeptonQN() {return 0;}
/**
* Returns the tau lepton number.
* @return -1
*/
public int tauLeptonQN() {return -1;}
/**
* Returns the antiparticle of this particle.
*/
public QuantumParticle anti() {
return new TauNeutrino();
}
/**
* Returns true if qp is the antiparticle.
*/
public boolean isAnti(QuantumParticle qp) {
return (qp!=null) && (qp instanceof TauNeutrino);
}
/**
* Returns a string representing this class.
*/
public String toString() {
return new String("Antitau neutrino");
}
/**
* Emits a W-.
*/
public AntiTau emit(WMinus w) {
AntiTau e=new AntiTau();
e.momentum=momentum.subtract(w.momentum);
return e;
}
/**
* Absorbs a W+.
*/
public AntiTau absorb(WPlus w) {
AntiTau e=new AntiTau();
e.momentum=momentum.add(w.momentum);
return e;
}
/**
* Emits a Z0.
*/
public AntiTauNeutrino emit(ZZero z) {
momentum=momentum.subtract(z.momentum);
return this;
}
/**
* Absorbs a Z0.
*/
public AntiTauNeutrino absorb(ZZero z) {
momentum=momentum.add(z.momentum);
return this;
}
}