无序瞬子媒质中的三胶子凝聚  

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

作　　者：杨平雄 刘觉平 

机构地区：武汉大学物理系

出　　处：《武汉大学学报（自然科学版）》1995年第1期73-77,共5页Journal of Wuhan University(Natural Science Edition)

基　　金：国家自然科学基金

摘　　要：在有限温度量子色动力学瞬子真空模型中，考虑瞬子间的相互作用，应用费曼变分原理和平均场近似，研究了三胶子凝聚的温度依赖性，结果表明：三胶子凝聚随温度升高而衰减，并在Ｔ≈３．０∧ｍｓ时几乎为零，三胶子凝聚的干涉部分与非干涉部分相比可以忽略，低温近似仅在Ｔ＜６０ＭｅＶ温度区域成立。in consideration of the interaction between instantons,the temparature dependence of the three-gluon condensates in the instanton model of the finite temperature QCDvacuum is studied by using Feynman varational principle and mean-field approximation. The values of the three-gluon condensates are found to be decreasing with the temperature and vanishing at Tca3. OAfs. The interference parts of the three-gluon condensates are negligible with respect to the corresponding non-interference ones. Our results show that the low temperature approximation is only valid in the range of T<60 MeV.

关 键 词：量子色动力学 瞬子媒质 胶子凝聚 瞬子真空 

分 类 号：O572.2[理学—粒子物理与原子核物理]