The calculation of sparticle and Higgs decays in the minimal and next-to-minimal supersymmetric standard models: SOFTSUSY4.0

We describe a major extension of the SOFTSUSY spectrum calculator to include the calculation of the decays, branching ratios and lifetimes of sparticles into lighter sparticles, covering the next-to-minimal supersymmetric standard model (NMSSM) as well as the minimal supersymmetric standard model (MSSM). This document acts as a manual for the new version of SOFTSUSY, which includes the calculation of sparticle decays. We present a comprehensive collection of explicit expressions used by the program for the various partial widths of the different decay modes in the appendix.

本描述扩展了SOFTSUSY谱计算器，纳入了对超粒子（sparticles）衰变、分支比和寿命的计算，涵盖了次最小超对称标准模型（NMSSM）以及最小超对称标准模型（MSSM）。本文档作为SOFTSUSY新版本的指南，其中包括了超粒子衰变的计算。附录中提供了程序用于不同衰变模式各种部分宽度所使用的显式公式的详尽集合。