ar X iv : h ep - p h / 04 02 14 5 v 3 2 M ar 2 00 4 Automatic one - loop calculation of MSSM processes with GRACE

ar X iv : h ep - p h / 04 02 14 5 v 1 1 3 Fe b 20 04 Automatic one - loop calculation of MSSM processes with GRACE

We have developed the system for the automatic computation of cross-sections, GRACE/SUSY , including the one-loop calculations for processes of the minimal supersymmetric extension of the the standard model. We discuss how to check our system for the one-loop calculations in comparison with the case for the tree-level calculations. For an application, we investigate the process e + e − → Z 0 h 0 .

ar X iv : h ep - p h / 04 02 14 5 v 2 2 1 Fe b 20 04 Automatic one - loop calculation of MSSM processes with GRACE

Supersymmetry (SUSY) between bosons and fermions at the unification-energy scale is one of the most promising hypothesis, which is expecteted to resolve the remaining problems in the standard model. In particular, the minimal supersymmetric extension of the the standard model (MSSM) [1] has been extensively studied in the last decade due to the simplicity. For more than ten years, we have been ...

ar X iv : h ep - p h / 04 07 07 9 v 1 7 J ul 2 00 4 Multi - leg calculations with the GRACE / 1 - LOOP system

ar X iv : h ep - p h / 04 02 19 0 v 2 2 6 M ay 2 00 4 1 Pentaquarks in the 10 F - and 10 F - plets

ar X iv : h ep - p h / 04 02 14 7 v 1 1 3 Fe b 20 04 Contribution of dimension - six bosonic operators to H → γγ at one - loop level

The decay process H → γγ is examined in a model-independent way within the effective Lagrangian approach. Contribution of one-loop diagrams including SU(2) × U(1) invariant dimension-six bosonic operators is evaluated explicitly. The calculation is intended to fill a gap that exists in the current literature of the subject. [email protected] [email protected]