TRR 110: Symmetries and the Emergence of Structure in Quantum Chromodynamics (QCD)

这次CRC的主题是对称性的作用和量子色动力学(QCD)中结构的出现。这里，所研究的复杂结构包括强子和原子核，因为它们是强力的不同表现形式。将强子物理和核物理领域放在一起考虑，这是这个CRC的巨大优势，因为它现在也被全世界所接受。我们在所有不同的项目中都取得了相当大的进展，特别是在所谓的奇异XYZ态(和其他奇异或不寻常的态)方面，这些态在过去几年里一直是世界各地许多实验和理论研究的中心。这种CRC还以一种独特的方式结合了各种技术来解决这些困难的强相互作用的多粒子问题，即有效场论、晶格模拟和建模。特别是，晶格模拟现在也应用于原子核，我们打算进一步加强这一领域的研究，与使用这种方法研究强子结构和动力学的同事们密切合作。在第二个资助期，由于与中国同事的现有合作，继续关注强子物理方面。在第二个资助期，我们也开始了核物理方面的合作，相应地，在这一时期，核物理研究增加了。因此，强子和核物理也将是第三阶段的主要主题，重点将更加集中在需要大量计算资源的项目上。这反映了高性能计算在物理学中的贡献增加。

The main theme of this CRC is the role of symmetries and the emergence of structure in Quantum Chromodynamics (QCD). Here, the complex structures that are investigated include hadrons as well as nuclei, as these are different manifestations of the strong force. It is the great strength of this CRC that the fields of hadronic and nuclear physics are considered together, as it is now accepted also world-wide. We have made quite some progress in all the various projects, with particular emphasis on the so-called exotic XYZ-states (and other exotic or unusual states) that have been at the center of many experimental and theoretical investigations all over the world in the past years. This CRC also combines in a unique fashion various techniques to tackle these difficult strongly interacting many-particle problems, namely effective field theories, lattice simulations and modeling. In particular, lattice simulations are now also applied to atomic nuclei and we intend to further strengthen this line of research, in strong synergy with the colleagues who investigate hadron structure and dynamics using such methods. In the second funding period, there was a continued focus on hadron physics aspects which was due to the existing collaborations with Chinese colleagues. In the second funding period we started collaborations in nuclear physics too, and accordingly in this period nuclear physics research increased. Consequently, hadron and nuclear physics will also be the main themes in the third period with an increased focus on projects requiring substantial computational resources. This reflects the increased contribution of high-performance computing in physics.