diff -u -r1.1 -r1.2
--- Particles.java	18 Feb 2009 03:29:09 -0000	1.1
+++ Particles.java	3 Mar 2009 21:25:35 -0000	1.2
@@ -8,7 +8,7 @@

  * Frequently used particle types.
  *
  * @author D. Onoprienko

- * @version $Id: Particles.java,v 1.1 2009/02/18 03:29:09 onoprien Exp $

+ * @version $Id: Particles.java,v 1.2 2009/03/03 21:25:35 onoprien Exp $

  */
 public class Particles {
   

@@ -21,6 +21,11 @@

   public static final ParticleType TAU_MINUS = PROVIDER.get(15);
   public static final ParticleType TAU_PLUS = PROVIDER.get(-15);
 

+  public static final ParticleType PHOTON = PROVIDER.get(22);
+  public static final ParticleType Z_0 = PROVIDER.get(23);
+  public static final ParticleType W_PLUS = PROVIDER.get(24);
+  public static final ParticleType W_MINUS = PROVIDER.get(-24);
+

   public static final ParticleType PI_PLUS = PROVIDER.get(211);
   public static final ParticleType PI_MINUS = PROVIDER.get(-211);
   public static final ParticleType PI_0 = PROVIDER.get(111);