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

超对称和非超对称模型的研究：FlexibleSUSY 的开发和唯象应用

• 批准号: 190169142
• 负责人: Professor Dr. Dominik Stöckinger
• 金额: --
• 依托单位: Institut für Kern- und Teilchenphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/190169142?language=en
• 关键词: Studies; supersymmetric; non; models; Development

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.

在接下来的十年里，基本粒子物理学将以欧洲核子研究中心的大型强子对撞机（LHC）实验为主导，这使得在电弱对称性破缺的能量尺度和TeV尺度上对物理学的测量越来越精确。与此同时，一些较小的实验研究特定的，互补的观测值，如μ子的异常磁矩和电偶极矩。总的来说，这些实验有助于回答基本问题：希格斯场和希格斯玻色子的电弱对称性破缺的潜在动力学是什么，以及是否偏离了“标准模型”的预测？什么是“味道”的起源，即三代夸克和轻子/在这个领域有新的物理学吗？宇宙中重子-反重子不对称性的起源是什么/是否存在CP破坏的额外来源？除了即将进行的实验，还需要在理论上取得进展，以便解释标准模型之外的不同物理场景中的测量结果。通过这种方式，新理论的候选者可以被检验、证伪或缩小范围。本项目的重点是计算机程序包的可扩展性SUSY。超对称性是一个多功能的工具，用于精确研究新的物理模型。它是一个通用的，独立于模型的代码，为具体的模型生成编译程序。该计划是在第一个资助期内开发的，第二个资助期致力于增加重要的功能：新功能包括在超对称理论中（在最小和非最小模型中）对希格斯玻色子质量的高精度预测以及衰变的计算，特别是希格斯玻色子衰变。在所有量的计算中，高度重视高精度-这意味着要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，将进一步改进和扩展可扩展超对称性的功能和精度。希格斯玻色子质量的计算将在更高的阶次上进行，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非常大，但我们计划以特殊的方式处理特别重要的模型，并实施和发布具有更高精度预测的专用代码。此外，预测电偶极矩和风味变化过程将实施，允许测试预测CP违规和风味物理在许多模型对实验结果。