Light hadron spectroscopy ((05) S03)

轻夸克的对称性和长程动力学表现在强子的复激发谱中。特别是，质子和中子的激发是这个项目的中心。在几个研究机构对介子光产生中的自旋自由度的详细研究将允许在不久的将来以前所未有的完整性和精确度描述这些过程。届时，模型依赖性显著降低的新的分波分析将成为可能。该项目致力于在Mami/Mainz、ELSA/Bonn和BEPC-II/Beijing加速器上的专用实验的性能、分析和解释。这些测量是进行分波分析以及识别和表征重子共振的基础。

The symmetries and long-range dynamics of light quarks are manifest in the complex excitation spectra of hadrons. In particular, the excitations of protons and neutrons are at the center of this project. The detailed study of spin degrees of freedom in meson photoproduction at several research facilities will allow for a description of these processes with unprecedented completeness and precision in the near future. New partial wave analyses with a significantly reduced model dependence will then be possible. This project is devoted to the performance, analysis, and interpretation of dedicated experiments at the accelerators MAMI/Mainz, ELSA/Bonn and BEPC-II/Beijing. These measurements are the basis for partial wave analyses and the identification and characterisation of baryon resonances.