Flavour and CP physics in supersymmetric theories

随着大型强子对撞机（欧洲核子研究中心，日内瓦）在2008年9月的启动，一个基本粒子物理学的新时代正在到来。最有可能的是，在大型强子对撞机上，超越粒子物理标准模型的物理信号将被发现。超对称是标准模型最有希望的扩展之一。寻找超对称粒子在大型强子对撞机中具有很高的优先级。“味物理和超对称理论中的CP违反”研究项目是维也纳大学（奥地利）和维尔茨堡大学（德国）的联合研究项目。迄今为止，大多数关于未来对撞机超对称的研究都是在最小超对称标准模型中进行的，假设混合可以忽略，r宇称守恒。本研究项目的主要目的是探索标准模型的超对称扩展的风味部分，有或没有r宇称守恒。我们计划一方面研究在超对称破缺项中具有代际混合的最小超对称标准模型，另一方面研究具有r宇称违反的模型。在系统的研究中，我们要考虑最一般的情况，包括CP违反相和风味违反参数。为了找出味道和CP违反参数对确定潜在超对称参数的影响，我们将系统地分析超对称粒子在对撞机上的产生和衰变过程。我们想要考虑现有的实验和理论对风味违反参数的限制以及来自暗物质密度的限制。尽管有严格的限制，我们预计在超对称的生产和衰变过程中会有很大的风味破坏信号。因此，“味物理和超对称理论中的CP违反”研究项目的结果将对大型强子对撞机和其他未来对撞机的实验起到重要作用。

With the start of the Large Hadron Collider LHC (CERN, Geneva) in September 2008 a new era of elementary particle physics is arising. Most likely, at the LHC signals of physics beyond the Standard Model of particle physics will be discovered. Supersymmetry is one of the most promising extensions of the Standard Model. The search for supersymmetric particles has a very high priority at LHC.The research project “Flavour physics and CP violation in supersymmetric theories” is a joint research project of the University of Vienna (Austria) and the University of Würzburg (Germany). Up to now most studies concerning supersymmetry at future colliders have been performed in the Minimal Supersymmetric Standard Model under the assumption that flavour mixing can be neglected and that R-parity is conserved. The main purpose of the present research project is to explore the flavour sector of supersymmetric extensions of the Standard Model, with and without R-parity conservation. We plan to investigate on the one hand the Minimal Supersymmetric Standard Model with intergenerational mixing in the supersymmetry breaking terms and on the other hand models with R-parity violation. In a systematic study we want to consider the most general case including CP violating phases as well as flavour violating parameters. In order to work out the implications of flavour and CP violating parameters for the determination of the underlying supersymmetric parameters, we are going to analyze in a systematic way production and decay processes of supersymetric particles at colliders. We want to take into account the existing experimental and theoretical constraints for the flavour violating parameters and the constraints from the dark matter density. In spite of the severe restrictions we expect large flavour violating signals in the supersymmetric production and decay processes. Therefore, the results of the research project “Flavour physics and CP violation in supersymmetric theories” will play an important role for the experiments at the LHC and other future colliders.