GRK 2044: Mass and Symmetries after the Discovery of the Higgs Particle at the LHC

2012年，在欧洲核子研究中心的大型强子对撞机（LHC）上发现了希格斯玻色子，这是一个里程碑式的发现，但关键的基本问题仍然没有答案：发现的希格斯玻色子是否符合标准模型（SM）的预测，它如何适应扩展模型？在多大的能量下SM才是有效的，我们关于电弱对称性破缺的描述是正确的吗？在TeV尺度上有新的对称性和新的粒子吗？哪些粒子形成暗物质（DM），它们如何适应理论模型？大型强子对撞机能产生和检测DM粒子吗？它们能在天体粒子物理学实验中被直接探测到吗？计划中的研究培训小组的目标是做出重大的，并在许多地方领先的贡献，以回答理论和实验物理学的合作和相互作用中的那些开放的关键问题。相互关联的研究活动属于以下领域：（a）实验粒子物理学：分析在大型强子对撞机上进行的ATLAS实验收集的数据，并为ATLAS实验进行探测器研究和开发，以便对大型强子对撞机进行高光度升级，从而对希格斯玻色子、电弱对称性破缺和重要的关键过程进行精确研究，寻找新的粒子和对称性，特别是关于DM的性质。B）实验性天体粒子物理学：分析LNGS和CAST实验中氙的数据，并为直接寻找DM候选物的达尔文实验进行探测器研究和开发。（3）理论粒子物理学：精确预测的希格斯粒子的性质的调查，电弱对称性破缺和测试明确的模型超越SM和发展fieldtheoretical概念和方法。在研究培训组的结构化教育包括，除了在各个研究领域的专业化，实验和理论之间的知识和方法的转移，因此，不仅激发了自己的研究项目的创造力，而且还培养了学术和非学术职业道路的关键专业技能。此外，与CERN的密切合作，与LHC希格斯截面工作组的联系，以及弗赖堡在国际ATLAS，CAST，XENON实验为最高水平的教育和研究以及科学界的网络建立了良好的基础。

After the milestone of the discovery of the Higgs boson at the Large Hadron Collider (LHC) at CERN in2012 crucial basic questions remain still unanswered: Is the discovered Higgs boson in line with the Standard Model (SM) prediction, how does it fit into extended models? Up to which energy is the SM valid, and is our picture of electroweak symmetry breaking correct? Are there new symmetries and new particles at the TeV scale? Which particles form Dark Matter (DM), and how do they fit into theoretical models? Can DM particles be produced and detected at the LHC? Can they be detected directly in astroparticle physics experiments?The goal of the planned research training group is to make significant and in many places leading contributions to answer those open key questions in the cooperation and interplay of theoretical and experimental physics. The interconnected research activities belong to the following areas: a) Experimental particle physics: analysis of data collected by the ATLAS experiment at the LHC and detector research and development for the ATLAS experiment for the high-luminosity upgrade of the LHC for precision investigations of the Higgs boson, of electroweak symmetry breaking and important key processes, the search for new particles and symmetries in particular with respect to the nature of DM. b) Experimental astroparticle physics: analysis of data from the XENON at the LNGS and CAST experiments and detector research and development for the DARWIN experiment for the direct search for candidates for DM. c) Theoretical particle physics: precision predictions for the investigation of the nature of the Higgs particle, electroweak symmetry breaking and for testing explicit models beyond the SM and development of fieldtheoretical concepts and methods.The structured education in the research training group comprises, apart from specializations in the various research fields, the transfer of knowledge and methodologies between experiment and theory and, thus, does not only stimulate the creativity in the own research project, but also fosters key professional skills for an academic as well as a non-academic career path. Moreover, the strong engagement with CERN, the connection to the LHC Higgs Cross Section Working Group, as well as Freiburg's cooperationin international ATLAS, CAST, and XENON experiments oer an excellent basis for education and research at the highest possible level and networking within the scientific community.