Exotic Hadrons from Continuum QCD II

这个项目的中心目标是进一步改进基于QCD的非微扰连续统框架，用于根据夸克和胶子含量计算四夸克、常规介子和胶球状态的质量和混合矩阵。这些计算结果将被用来为解释现有和未来实验中获得的数据提供理论基础。特别是，我们将讨论四夸克态(介子-介子对双夸克-反双夸克)的内部结构以及奇异的四夸克态和胶球态与常规介子的潜在混合问题。该项目的一个重要技术目标是允许在考虑到解析结构的情况下在复杂的能量平面上进行显式计算。该项目分为两个部分，分别与1GeV以下和1GeV以上的物理有关。我们的理论工具是Landau规范QCD的Dyson-Schwinger方程和Bethe-Salpeter方程，以及相应的束缚态和共振的四体方程。

The central goal of this project is to further improve a QCD-based, non-perturbative continuum framework for the calculation of masses and mixing matrices of four-quark, conventional meson and glueball states on basis of their quark and gluon content. The results of these calculations will be used to provide a theoretical foundation for the interpretation of data obtained in existing and future experiments. In particular we will address the fundamental questions of the internal structure of four-quark states (meson-meson vs. diquark-antidiquark) and the potential mixing between the exotic four-quark and glueball states with conventional mesons. An important technical goal of the project is to allow for explicit calculations in the complex energy plane taking the analytic structure into account. The project is organized into two parts which are associated with the physics below and above 1 GeV. Our theoretical tools are the Dyson-Schwinger and Bethe-Salpeter equations of Landau gauge QCD as well as the corresponding four-body equation for bound states and resonances.