A SYSTEM FOR THE AUTOMATIC COMPUTATION OF CROSS-SECTIONS INCLUDING SUSY PARTICLES

We introduce a new method to treat Majorana fermions on the GRACE system, which has already been developed for the computation of the matrix elements for the processes of the standard model. In the standard model, we already have included such particles as Dirac fermions, gauge bosons and scalar bosons in the system. On the other hand, there are four Majorana fermions called neutralinos in the minimal SUSY standard model (MSSM). In consequence, we have constructed a system for the automatic computation of cross-sections for the processes of the MSSM. It is remarkable that our system is also applicable for another model including Majorana fermions once the de・］ition of the model ・〕e is given.
Authors: MASATO JIMBO, TADASHI KON, HIDEKAZU TANAKA, TOSHIAKI KANEKO and MINAMI-TATEYA COLLABORATION

Proceedings of the Fourth International Workshop on Software Engineering, Artificial Intelligence and Expert Systems for High Energy and Nuclear Physics (AIHENP ’95), New Computing Techniques in Physics Research IV,  Pisa, Italy, April 3-8, 1995, edited by B.Denby  and D.Perret-Gallix, (World Scientific, Singapore, 1995)

149-154