Exotic Hadrons from Continuum QCD II

该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，以根据夸克和胶子含量计算四夸克态、常规介子态和胶球态的质量和混合矩阵。 这些计算的结果将被用来提供一个理论基础，在现有的和未来的实验中获得的数据的解释。特别是，我们将解决的基本问题的内部结构的四夸克态（介子介子与双夸克反双夸克）和潜在的混合之间的奇异的四夸克和胶球状态与传统的介子。该项目的一个重要技术目标是考虑到分析结构，允许在复杂的能量平面中进行显式计算。该项目分为两个部分，分别与1 GeV以下和1 GeV以上的物理相关联。我们的理论工具是朗道规范QCD的Dyson-Schwinger和Bethe-Salpeter方程以及相应的束缚态和共振四体方程。

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.