HERBVI - a program for simulation of baryon and lepton number violating processes ∗

We describe a Monte Carlo event generator for the simulation of baryon-and lepton-number violating processes at supercolliders. The package, HERBVI, is designed as a hard-process generator interfacing to the general hadronic event simulation program HERWIG. In view of the very high multiplicity of gauge bosons expected in such processes, particular attention is paid to the efficient generation of multiparticle phase space. The program also takes account of the expected colour structure of baryon-number violating vertices, which has important implications for the hadronization of the final state. Nature of physical problem: simulation of baryon and lepton number violating processes with an associated large gauge boson multiplicity. Method of solution: generation of phase space configurations using an efficient algorithm , coupled to a phenomenological model of the physical processes under study. Typical running time: 2-3 hours for a 10 4 event simulation (DEC ALPHA 4000), dependent on the process simulated Unusual features of the program: none.