Theoretical Study of the Quark-Gluon Plasma and Ultrarerativistic Nudeus-Nudeus Collisions

夸克-胶子等离子体和超相对论核-核碰撞的理论研究

基本信息

批准号：
13440067
负责人：
MATSUI Tetsuo
金额：
$ 4.99万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2004
项目状态：
已结题

项目摘要

In this research project, we have studied various theoretical problems related to the properties of matter under extreme physical conditions in temperatures and baryon number densities, ranging from the nature of the QCD phase transitions to the signals of the new phase of matter (the quark-gluon plasma) expected to be formed in the course of ultra-relativistic nucleus-nucleus collisions.We have computed the topological susceptibilities in terms of NJL model supplemented with 't Hooft interaction and obtained a results very similar to the lattice QCD results. We also studied the nature of the chiral phase transition and clarified the role of the hydrodynamic mode near the critical end point (CEP) in the QCD phase diagram on temperature v.s. baryon chemical potential plane as well as in the dynamical scaling behavior. The absorption of high energy charmonium traversing in random color medium was studied in order to access the utility of charmonium as a probe of the quark-gluon plasma and we have shown that the high-energy behavior is qualitatively different from the naive nuclear absorption model.In addition to these problems, we obtained many important results in related theoretical problems such as connection of Casimir effect to finite temperature problem, topological model of baryons, spontaneous symmetry breaking in light-front quantization method and the application of the variational method in quantum field theory to the dynamics of Base-Einstein condensates.

在该研究项目中，我们研究了与物质在温度和重子数量密度下在极端物理条件下的特性相关的各种理论问题，从QCD期过渡的性质到新阶段的信号（Quark--预计将在超偏见的核核碰撞过程中形成Gluon等离子体。我们已经根据补充了Hooft相互作用的NJL模型计算了拓扑敏感性，并获得了与Lattice QCD结果非常相似的结果。我们还研究了手性相变的性质，并阐明了临界终点（CEP）在温度v.s的QCD相图中的水动力模式的作用。 Baryon化学平面以及动态缩放行为。研究了在随机颜色培养基中遍历高能炭遍历的吸收，以便访问炭含量作为Quark-Gluon等离子体的探针，我们已经表明，高能量行为与天真的核吸收模型在质上不同。除这些问题外，我们还获得了相关理论问题的许多重要结果，例如Casimir效应与有限温度问题的连接，重子的拓扑模型，在轻范围量化方法中的自发对称性破坏以及变量方法在量子场中的应用理论基础 - 基因凝结物的动力学。