Phenomenology of supersymmetry with R-symmetry

超对称性是超越标准模型的物理学中最有动力的想法之一，欧洲核子研究中心大型强子对撞机(LHC)的实验优先寻找它。简单的超对称模型可以比标准模型更自然地解释希格斯玻色子的存在和质量，包含暗物质粒子的候选者，并且与高能下所有力的大统一相容。R对称模型可以改善标准超对称模型的两个问题：R对称模型可以解释为什么超对称粒子还没有出现在LHC上(它们产生的频率较低)，以及为什么在所谓的违反味道的过程中没有观察到超对称效应(R-对称`保护‘味道’)。R-对称性-除了超对称性和规范不变性-在量子场论中唯一可能的数学对称性类型。在这个项目中，我们的目标是对这些模型进行彻底的现象学分析。在第一个资助期，研究了重要的中心观测值，如希格斯玻色子质量和Higg性质，电弱精密观测值，超对称粒子的产生和衰变，暗物质，轻子味道物理。考虑到未来的实验，这些研究被证明是令人惊讶的丰富、现象上的成功和有前途的。此外，与标准超对称性相比，R对称性导致了显著不同的预测，并且存在被早期研究忽略的关键R对称性参数。在第二个资助期，一方面将以类似的方式研究两个进一步的重要和互补的主题：夸克味道物理和CP破坏/电偶极矩。在这里，我们可以期待对众所周知的介子衰变或电子的电偶极矩的预测，以及它们的关联性与标准超对称性的关联性有很大的不同。但我们也可以预计，与更大范围的研究的预期相比，结果会更复杂、更有趣。另一方面，将对LHC过程的计算进行理论/技术上的发展：将实施一种所谓的恢复大修正的方法(对于R对称和更一般的情况)，以提高计算的精度和可靠性。这项工作的一个重要目标是超越R-对称性的泛化。最后，将更新第一个资助期的现象学结果，并与最新的实验数据进行比较。

Supersymmetry is one of the best motivated ideas for physics beyond the Standard Model, and experiments at the Large Hadron Collider (LHC) at CERN search for it with high priority. Simple supersymmetric models can explain the existence and the mass of the Higgs boson more naturally than the Standard Model, contain candidates for dark matter particles, and are compatible with Grand Unification of all forces at high energies.R-symmetric models can ameliorate two problems of standard supersymmetric models:R-symmetric models can explain why supersymmetric particles have not yet shown up at LHC (they are produced less frequently), and why no supersymmetry effects have been observed in so-called flavour-violating processes (R-symmetry ``protects'' flavour). R-symmetryis --- besides supersymmetry and gauge invariance --- the only type of symmetries mathematically possible in quantum field theories. In this project we aim to contribute to a thorough phenomenological analysis of such models. In the first funding period important central observables such as Higgs boson masses and Higg properties, electroweak precision observables, production and decay of supersymmetric particles, dark matter, and lepton flavour physics have been studied. The studies turned out to be surprisingly rich, phenomenologically successful and promising in view of future experiments. Moreover, it has turned out that R-symmetry leads to significantly distinct predictions compared to standard supersymmetry, and that there exist crucial R-symmetry parameters neglected in earlier studies.In the second funding period, on the one hand two further important and complementary topics will be studied in an analogous way: quark flavour physics and CP-violation/electric dipole moments. Here we can expect predictions for e.g. well-known $b$-meson decays or the electric dipole moment of the electron and their correlations to differ strongly from the ones of standard supersymmetry. But we can also expect the results to be more complicated and more interesting compared to expectations fromearlier studies. On the other hand, theoretical/technical developments of computations of LHC processes will be done: a method for the so-called resummation of large corrections will be implemented (both for R-symmetry and for the more general case), to increase the accuracy and reliability of the computation. An important goal for this work is the generalizability beyond R-symmetry. Finally the phenomenological results of the first funding period will be updated and compared with the latest experimental data.