Studies of supersymmetric and non-supersymmetric models: Development of FlexibleSUSY and phenomenological applications

在接下来的十年里，基本粒子物理学将由欧洲核子研究中心的大型强子对撞机(LHC)的实验所主导，从而允许在电弱对称破缺的能量尺度和TeV尺度上进行越来越精确的物理测量。与此同时，一些较小的实验研究了特定的、互补的可观测到的现象，如Muon的反常磁矩和电偶极矩。综上所述，这些实验允许在回答基本问题方面取得进展：希格斯场和希格斯玻色子的弱电弱对称破缺的潜在动力学是什么，以及是否存在与标准模型预测的偏差？“味道”，即三代夸克和轻子的起源是什么/这一领域有新的物理学吗？宇宙中重子-反重子不对称的起源是什么？有没有其他原因导致CP破坏？除了即将进行的实验外，还需要在理论上取得进展，以解释标准模型以外的不同物理场景下的测量结果。通过这种方式，新理论的候选者可以被测试、证伪或缩小范围。本课题研究的是计算机程序包FlexibleSUSY。FlexibleSUSY构成了对新物理模型进行精确研究的通用工具。它是一个通用的、与模型无关的代码，为具体的模型生成编译后的程序。该程序是在第一个资助期开发的，第二个资助期致力于增加重要的功能：新功能包括超对称理论中希格斯玻色子质量的高精度预测(包括最小和非最小模型)，以及衰变的计算，特别是希格斯玻色子衰变。在所有量的计算中，都强调高精度--这意味着考虑到微扰理论中的高阶，以及重整化方案和计算策略的最佳选择。在第三个资助期内，FlexibleSUSY的功能和精度将得到进一步的改进和扩展。希格斯玻色子质量的计算将以更高的阶数进行，其他种类的衰变过程将以更高的精度计算。虽然可能的模型范围已经很大，但我们计划以特殊的方式对待特别重要的模型，并实施和发布具有更高预测精度的专用代码。此外，将实施对电偶极矩和风味变化过程的预测，以允许在许多模型中根据实验结果测试对CP破坏和风味物理的预测。

The forthcoming decade of elementary particle physics will be dominated by experiments at the Large Hadron Collider (LHC) at CERN, allowing more and more accurate measurements of physics at the energy scale of electroweak symmetry breaking and the TeV-scale. At the same time a number of smaller experiments investigate specific, complementary observables such as the anomalous magnetic moment of the muon and electric dipole moments. Taken together, these experiments allow progress towards answering fundamental questions: What is the underlying dynamics of electroweak symmetry breaking/of the Higgs field and Higgs boson, and are there deviations from the ``Standard Model'' predictions? What is the origin of ``flavour'', i.e. the three generations of quarks and leptons/is there new physics in this sector? What is the origin of the baryon-antibaryon asymmetry in theuniverse/are there additional sources of the responsible CP-violation?Apart from the forthcoming experiments, progress in theory is required in order to interpret measurements in different scenarios for physics beyond the Standard Model. In this way candidates for new theories can be tested, falsified or narrowed down. The present project focuses on the computer program package FlexibleSUSY. FlexibleSUSY constitutes a versatile tool for precision-investigations of new physics models. It is a generic, model-independent code which produces compiled programs forconcrete models. The program was developed during the first funding period, and the second funding period was devoted to adding important functionality: the new functions include high-precision predictions of Higgs boson masses in supersymmetric theories (both in minimal and non-minimal models) and the computation of decays, particularly Higgs boson decays. In the computations of all quantities strong emphasis is put on high precision - this implies taking into account higher orders in perturbation theory and optimal choices of renormalization schemes and computational strategies.During the third funding period the functionality and precision of FlexibleSUSY will be further improved and extended. Computations of Higgs boson masses will be done at even higher orders, and additional kinds of decay processes will be computed at higher precision. While the range of possible models is already very large, we plan to treat particularly important models in a special way and implement and publish dedicated codes with higher precision predictions. Furthermore, predictions for electric dipole moments and flavour-changing processes will be implemented, to allow testing predictions for CP-violation and flavour physics in many models against experimental results.