无序瞬子媒质中的两胶子凝聚  

TWO-GLUON CONDENSATES IN THE INSTANTON MEDIUM OF A DISORDERED PHASE

作　　者：杨平雄 刘觉平 

机构地区：武汉大学物理学系

出　　处：《武汉大学学报（自然科学版）》1995年第1期67-72,共6页Journal of Wuhan University(Natural Science Edition)

基　　金：国家自然科学基金

摘　　要：在量子色动力学瞬子真空模型中，研究了ＳＵｃ（２）、ＳＵｃ（３）规范场论中两胶子凝聚的温度依赖关系，用费曼变分原理和平均场近似方法，发现两胶子凝聚随温度升高而衰减，在Ｔ≈４．５∧ｍｓ时，凝聚几乎消失；色磁凝聚和色电凝聚的干涉部分同非干涉部分相比，虽然比较小，但在低温区不可忽略。We investigate the temperature dependence of the two-gluon condensates for the pure SUe(2),SUc(3) gauge field theories in the instanton model of the QCD vacuum. Using Feynman variational principle and mean-field approximation, the values of twogluon condensates are found to be decreasing with the temperature and vanishing at T sc 4. SAme for Nc = 3. Compared with their non-interference ones, the interference parts of both chromomagnetic and chromoelectric condensates are insignificant but cannot be neglected at thirlow temperatures.

关 键 词：量子色动力学 瞬子媒质 胶子凝聚 夸克 瞬子真空 

分 类 号：O572.2[理学—粒子物理与原子核物理]