无序瞬子媒质中的三胶子凝聚

无序瞬子媒质中的三胶子凝聚 THREE-GLUON CONDENSATES IN THE INSTANTON MEDIUM OF A DISORDERED PHASE 杨平雄 Yang Pingxiong 1 first-author 刘觉平 Liu Jueping 1 武汉大学物理系 武汉大学物理系 Department of Physics ,Wuhan University Department of Physics ,Wuhan University 在有限温度量子色动力学（ＱＣＤ）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≈３．０Ａｍｓ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. 量子色动力学 瞬子媒质 三胶子凝聚 quantum chromodynarnics instanton medium three-gluon condensates O572.2 国家自然科学基金(61672102) 1995-01-01 2021-04-01 1