手征相变、退禁闭相变及QCD临界终点

项目名称： 手征相变、退禁闭相变及QCD临界终点

项目编号： No.11275213

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 黄梅

作者单位： 中国科学院高能物理研究所

项目金额： 80万元

中文摘要： 手征相变和退禁闭相变一直是QCD相结构的核心课题，目前还没有很好的能同时描述手征相变和退禁闭相变的有效模型。QCD有效动力学模型里虽然有比较好的描述手征对称性破缺和恢复的模型，如南部模型，但是还没有比较好的描述禁闭和退禁闭相变的动力学模型。而 5维全息QCD模型中虽然有比较好的描述禁闭和退禁闭相变的模型，但是还没有比较好的描述手征相变的全息模型。本项目将充分借鉴这两类模型的优点，分别建立能同时描述手征相变和退禁闭相变的QCD动力学模型以及5维全息QCD模型，并研究有限温度密度下的QCD相结构以及探寻QCD临界终点。另外，本项目还将结合强子物理对轻标量介子的最新研究进展,考察标量四夸克态、标量胶球与传统的标量夸克-反夸克态的耦合对手征对称性自发破缺和恢复、QCD相结构及QCD临界终点的影响，并将研究有限重子数密度下奇特强子态的产生及其媒介性质。

中文关键词： 手征破缺和线性禁闭；动力学全息QCD模型；标量四夸克-夸克反夸克耦合；温度相关输运系数；强磁场

英文摘要： The chiral and deconfinement phase transitions at finite temperature and density are of great interests for studying the QCD phase structure. No effective model exists yet, which can describe the chiral restoration and deconfinement phase transition simultaneously. In the framework of 4D effective dynamical models, the chiral symmetry breaking and restoration has been described very well by some dynamical models, such as the Nambu- - Jona-Lasinio (NJL) model. In spite of that, a 4D dynamical model which can accommodate the deconfinement phase transition very well is still missing. To contrast, in the framework of 5D holographic QCD model, some models can describe deconfinement phase transition successfully. Nevertheless, no holographic model can accommodate the chiral phase transition nicely. In our research proporsal, we aim at developing two models: a 4D QCD dynamical model and a 5D holographic QCD model, respectively. These two models are supposed to describe both the chiral and deconfinement phase transitions self-consistently. In the framweork of these two models, we plan to investigate the QCD phase structure and QCD critical end point (CEP). In addition, based on the latest progress on lightest scalar mesons in hadron physics, we plan to explore how the chiral phase transition and QCD CEP as well as the

英文关键词： chiral symmetry breaking and linear confinement；dynamical holographic QCD model；scalar tetraquark and quark-antiquark coupling；temperature dependent transport coeffient；strong magnetic field