夸克胶子真空凝聚对温度的依赖  

Temperature dependence of quarks and gluon vacuum condensate

作　　者：周丽娟[1] 钟红伟[1] 

机构地区：[1]广西科技大学理学院,广西柳州545006

出　　处：《广西科技大学学报》2014年第4期1-4,共4页Journal of Guangxi University of Science and Technology

基　　金：国家自然科学基金项目(11365002);广西青年基金滚动项目(2013GXNSFBB053007);广西教育厅科研课题重点项目(2013ZD049)资助

摘　　要：基于"彩虹"近似,在有限温度下,求解Dyson-Schwinger方程,计算两夸克真空凝聚、四夸克真空凝聚和夸克胶子混合真空凝聚对温度的依赖关系.这些凝聚值是QCD求和规则的重要输入参数,对阐明QCD结构和强子性质非常重要.计算结果表明:在临界温度T_c以上,将会发生手征对称性的恢复,而在临界温度以下,两夸克真空凝聚、四夸克真空凝聚和夸克胶子混合真空凝聚对温度有弱的依赖性.Based on the Dyson-Schwinger Equations （DSEs）, the two quark vacuum condensate, the four quark vacuum condensate, and quark gluon mixed vacuum condensate in non-perturbative QCD vacuum state are investigated by solving the DSEs with rainbow truncation at finite temperature. These condensates are important input parameters in QCD sum rule with zero and finite temperature, and in studying hadron physics. The present calculated results show that these physical quantities are almost independent of the temperature below the critical point temperature Tc = 131MeV, and above Tc the chiral symmetry is of restoration.

关 键 词：Dyson—Schwinger方程 手征对称性破缺 夸克胶子真空凝聚 

分 类 号：O572.33[理学—粒子物理与原子核物理]