Strong Interactions and Hadron Physics

1.本研究的主要目的是基于量子色动力学（QCD）阐明非微扰区手征对称相转变为自发破缺相的机制，以及强子是如何被色禁闭构造的，使得微扰区的结果与实验一致.沿着这条路线，我们利用格点规范理论、阿贝尔投影和反演方法，发展了几种处理包括非微扰效应在内的问题的新方法，并将其应用于相变、禁闭等机制的研究.人们已经做了一些努力将QCD与被认为是QCD低能有效理论的非线性σ模型联系起来。利用非线性sigma模型的孤子解skyrmion和手征袋模型研究了重子及其相互作用的性质.本文以格点规范理论为基础，利用计算机对QCD系统的相结构、强子的质量谱和Regge轨线的斜率等进行了直接研究。由于新的计算方法和计算机的迅速发展，最近的结果是高度可信的，因此以前的结果需要重新考虑.统一包括量子色动力学在内的相互作用和克服所谓标准模型的尝试已在积极进行。结合在100GeV附近及以上的实验结果，计算了CP破坏和顶夸克质量的理论预言。关于早期宇宙的创生，我们用有限温度QCD研究了夸克胶子等离子体和高密度物质。

1. The main purpose of this research project was to clarify the mechanisms how transfer the chiral symmetric phase into spontaneously broken phase and how hadrons are constructed with color confinement in the non-perturbative regions on the basis of QCD(Quantum Chromodynamics) which leads to results coincide with the experiments in the perturbative regions.2. Along this line in terms of the lattice gauge theory, Abelian projection and inverse method several new methods which can treat the problems including the non-perturbative effects are developed and applied to investigate mechanism of the phase transition, confinement, etc.3. Several efforts have been done to relate QCD to the non-linear sigma model which are considered as the low energy effective theory of QCD. In terms of skyrmion which is the soliton solution of the non-linear sigma model the properties of baryons and their interactions are studied as well as in terms of the chiral bag model.4. Based on the lattice gauge theory and by use of computer the direct study of the phase structure of QCD system, mass spectra of hadrons and the slope of the Regge trajectories, etc. has been continued. Due to the new method of calculation and rapid progress of computer machine the recent results are highly plausible so that the earlier results have to be required another look.5. The attempts to unify the interactions including QCD and to over come so called the standard model have been actively carried. In connection with the experimental situations where new results around and above 10OGeV have been obtained, the theoretical predictions on the CP violation and top quark mass are calculated. Regarding to the creation of early universe the quark-gluon plasma and high density matter are studied by the finite temperature QCD.