Hadron Many-Body Systems and Quark Many-Body Systems

在强相互作用多体系统的研究中，必须考虑强子和夸克复合两个方面，并阐明它们的互补作用。除了对个别主题的研究之外，我们还强调了这一点，作为该主题的共同立场。主要研究成果如下：1。重子的结构;在手性袋模型中，阐明了矢量介子和袋内真空的影响，并说明了它们与Skyrme模型的关系。2. 核力量;建立了包含奇异自由度的夸克-簇模型，并研究了原子核中的夸克交换效应。已经开发了Skyrme模型和手性袋模型中的描述。3. 原子核中的相对论和交换电流效应；在将原子核描述为重子-介子系统的研究中，已经建立了一个考虑到包括负能态在内的相对论效应的框架，并成功地将统一处理核力和交换电流的微观公式应用于氘核的电子衰变。4. 核物质的不同阶段；一个新的介子凝聚中子星模型已经成功地应用于中子星的冷却、小故障和中微子暴等现象。有限温度下的核物质理论是在考虑中子星形成阶段和高能核碰撞的基础上发展起来的。5. 高能核-核碰撞；一种新的级联模型已成功地应用于再现亚gev区域的现有数据，并在改进的Glauber近似中对停止功率作出了可能的解释。6. 超原子核;对超核的产生、结构和衰变的理论分析作了进一步的发展，特别是再现了现有的^9_ Be数据，并提出了一个新的^9_ Be模型。

In the studies of strongly interacting many-body systems, it is important to take into consideration two facets, hadronic and quark-composite, and to clarify their complementary roles. We have put emphasis on this point as a common standpoint of the subject, in addition to the studies of the individual themes. The main achievements are as follows: 1. Baryonic structure; in the chiral bag model, the effects of vector mesons and of the vacuum inside the bag have been clarified and the relation to the Skyrme model has been shown. 2. Nuclear forces; the quark-cluster model has been developed to include the strangeness degress of freedom and to study the quark-exchange effects in nuclei. Descriptions in the Skyrme model and the chiral-bag model have been developed. 3. Relativistic and exchange current effects in nuclei; in the studies describing nuclei as the baryon-meson system, a framework has been developed by taking into account relativistic effects including negative energy states and also a microscopic formulation to unifiedly treat nuclear forces and exchange currents has been successfully applied to electron disintegration of deuteron. 4. Various phases of nuclear matter; a new model of pion-condensed neutron stars has been succesfully applied to neutron star phenomena such as cooling, glitches and neutrino bursts. Nuclear matter theory at finite temperature has been developed by keeping in mind on neutron-star formation stage and high-energy nuclear collisions. 5. High-energy nucleus-nucleus collisions; a new cascade model has been succesfully applied to reproduce the existing data in the sub-GeV region and a possible explanation of stopping power has been made in a modified Glauber approximation. 6. Hypernucleus; further development of theoretical analyses on production, structure and decay of hypernuclei has been made, especially in reproducing the existing ^9_ Be data and proposing a new model for ^9_ Be.