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Java > Open Source Codes > JSci > physics > particles > Graviton


1 package JSci.physics.particles;
2
3 import JSci.physics.quantum.QuantumParticle;
4
5 /**
6 * A class representing gravitons.
7 * @version 1.5
8 * @author Mark Hale
9 */
10 public final class Graviton extends GaugeBoson {
11         /**
12         * Constructs a graviton.
13         */
14         public Graviton() {}
15         /**
16         * Returns the rest mass (MeV).
17         * @return 0.0
18         */
19         public double restMass() {return 0.0;}
20         /**
21         * Returns the number of 1/2 units of spin.
22         * @return 4
23         */
24         public int spin() {return 4;}
25         /**
26         * Returns the electric charge.
27         * @return 0
28         */
29         public int charge() {return 0;}
30         /**
31         * Returns the antiparticle of this particle.
32         */
33         public QuantumParticle anti() {
34                 return new Graviton();
35         }
36         /**
37         * Returns true if qp is the antiparticle.
38         */
39         public boolean isAnti(QuantumParticle qp) {
40                 return (qp!=null) && (qp instanceof Graviton);
41         }
42         /**
43         * Returns a string representing this class.
44         */
45         public String JavaDoc toString() {
46                 return new String JavaDoc("Graviton");
47         }
48 }
49
50
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