Improved phase space treatment of massive multiparticle final states

In this paper the revised Kajantie-Byckling approach and improved phase space sampling techniques for the massive multiparticle final states are presented. The application of the developed procedures to the processes representative for LHC physics indicates the possibility of a substantial simplification of multiparticle phase space sampling while retaining a respectable weight variance reduction and unweighing efficiencies in the event generation process.