Theoretical studies on SUSY-particle search at colliders

超对称过程的横截面的计算是非常繁琐的玻恩水平上已经由于存在大量的粒子，特别是马约拉纳粒子，和费米子数违反顶点。我们，南立谷小组，已经完成了在MSSM玻恩截面计算的自动化。在GRACE/SUSY的基础上增加了计算单圈振幅的程序，构造了包括单圈辐射修正和初、终态真实的光子辐射的MSSM自动计算程序GRACE/SUSY/L。关于重整化过程，我们使用了以下方案：[1]在壳重整化。[2]降维。[3]规范对称重整化。[4]线性定尺功能。该包已通过两种方法检查。(1)紫外发散和红外发散的消失。(2)与手工计算所得结果或已发表在期刊上的结果进行比较。由于这两种方法都不足以检测到包中的一些潜在错误，我们在包中加入了非线性规范固定函数，在标准模型的情况下，这被证明是一个强有力的工具，用于检查包的自洽性。

The computation of the cross section of the SUSY processes is very cumbersome already on the Born level due to the existence of a large number of particles, in particular of Majorana particles, and fermion number violating vertices. We, the Minami Tateya group, have completed the automatization of the computation of the Born cross section in MSSM. The result is crystallized as the program package GRACE/SUSY.Supplementing GRACE/SUSY with the routines for the computation of the one-loop amplitudes, we have constructed the package of the automatic computation of the MSSM processed including the one-loop radiative corrections as well as the initial and final state real photon radiation GRACE/SUSY/L. Concerning renormalization procedure we have used the following scheme : [1] The on-shell renormalization. [2] The dimensional reduction. [3] The gauge symmetric renormalization. [4] A linear gauge-fixing functions. The package has been checked in two methods. (1) The vanishing of ultraviolet divergence and the infrared divergence. (2) The comparison with the results obtained by hand-computing or with the result already published in journals. Since these two method are not sufficient to detect some potential errors in the package, we are installing the non-linear gauge fixing functions in this package, which in the case of the Standard Model, is proven to provide a powerful tool for the check of self-consistency of the package.For the practical application, we analyzed in detail five processes of Higgs production.