Add DIF to MC production scripts

Control/CalypsoExample/Generation/python/faser_parser.py

@@ -47,6 +47,12 @@ def faser_pgparser():
     parser.add_argument("--zpos", default=None, type=float,
                         help="Specify z position of particles (in mm) (helpful to avoid FASERnu)")
 
+    parser.add_argument("--pidd1", default=211, type=int, 
+                        help="Specify PDG ID of daugther 1 for DIF generator")
+    parser.add_argument("--pidd2", default=None, type=int, 
+                        help="Specify PDG ID of daugther 2 for DIF generator")
+
+
     parser.add_argument("--sampler", default="log",
                         help="Specify energy sampling (log, lin, const, hist, hist2D)")
     parser.add_argument("--hist_name", default="log",