Meson Production in Antinucleon-Reactions on Atomic Nuclei: Theoretical Foundations for AIC and PANDA Experiments

我们提出了一个反质子-离子对撞机（AIC）设计研究的理论和实验联合项目，AIC将是一个重要的新设施，用于研究极端同位旋下反质子与奇异核的相互作用，特别强调稳定和短寿命核的结构研究。该项目的一个重要部分将是发展适合于物理理解和定量描述高能反质子与核子和原子核之间反应的理论方法。为此，将研究高能反质子与实验储存环中循环的核的束内碰撞，作为分别确定质子和中子的物质分布的工具。除了观察最终离子反应的质量和电荷外，还可以通过观察反应产物（如π介子）来获得关于反应类型的更多信息。作为AIC物理计划的一个有趣的延伸，我们将研究稀有同位素上反质子湮灭产生奇异超核。该项目涵盖了广泛的新问题，从反质子湮灭截面和远离稳定核的粒子产生的物理学到储存环中的束流实验技术和相应探测器的设计。探索性的实验和理论研究的结果将进入一个事件发生器和模拟框架的发展。从实验和理论方面的密切合作，我们期望一个特别有效的方法，允许在迭代过程中相互改进。反应的大规模模拟是该项目的一个组成部分，用于确定反应参数，检测器设置和分析技术的最佳范围。

We propose a joint theoretical and experimental project for a Design Study for an antiproton-ion collider (AIC), The AIC will be a major new facility for the investigation of the interactions of antiprotons with exotic nuclei at extreme isospin with special emphasis on structure investigations in stable and short-lived nuclei. An important part of the project will be to develop theoretical methods appropriate for a physical understanding and a quantitative description of the reactions between high energy antiprotons and nucleons and nuclei. For that purpose, in-beam collisions of high energy antiprotons with nuclei circulating in an experimental storage ring will be investigated as a tool to determine the matter distribution of protons and neutrons, respectively. Additional information on the type of reaction will be obtained by observing in addition to the mass and charge of the final ion reaction also reaction products liku the pions. As an interesting extension of the AIC physics program we will study the production of exotic hypernuclei by antiproton annihilation on rare isotopes. The project covers a broad spectrum of new questions ranging from the physics of antiproton annihilation cross sections and particle production on nuclei far from stability to the technology of in-beam experiments in storage rings and the desiign of the corresponding detectors. The results of the exploratory experimental and theoretical studies will enter into the development of an event generator and simulation framework. From the close collaboration between the experimental and the theoretical sides we expect a particular efficient approach, allowing mutual improvements in an iterative process. Large scale simulations of the reactions are an integral part the project, serving to determine the optimal range of reaction parameters, detector set-up and analysis techniques.