Eur. Phys. J. C (2005) 39: 439-450
https://doi.org/10.1140/epjc/s2004-02105-y

theoretical physics

Improved phase space treatment of massive multi-particle final states

¹ Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000, Ljubljana, Slovenia
² Jozef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
³ Institute of Physics, Jagellonian University, ul. Reymonta 4, 30-059, Krakow, Poland
⁴ Institute of Nuclear Physics PAS, ul. Radzikowskiego 152, 31-342, Krakow, Poland

^* e-mail: borut.kersevan@ijs.si

Abstract

In this paper the revised Kajantie-Byckling approach and improved phase space sampling techniques for the massive multi-particle 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 multi-particle phase space sampling while retaining a respectable weight variance reduction and unweighing efficiencies in the event generation process.