含真空贡献的3种味道的QM模型的手征相变  

Three Flavors of Chiral Phases with Vacuum Contribution in the Quark-Meson Model Including the Vacuum Fluctuation

作　　者：鲁海鹏 刘敏 LU Haipeng;LIU Min(College of Mathematics and Physics,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学数理学院,北京102206

出　　处：《吉首大学学报（自然科学版）》2018年第5期46-52,共7页Journal of Jishou University(Natural Sciences Edition)

摘　　要：首先对夸克凝聚作平均场近似得到热力学势,并利用PV正规化在热力学势中产生收敛的真空贡献,重新确定模型参数,然后通过热力学势的平衡方程得出凝聚随温度和化学势的变化,并通过凝聚和相图说明真空贡献对手征相变的影响.结果表明,零化学势下,真空贡献的加入会使凝聚溶解变慢,相变分界线对应的温度和化学势也更高,而增大mσ会使凝聚溶解变慢.Because the influence of vacuum contribution on the chiral phase transition,the mean -field approximation is used for quark condensate to obtain the thermodynamic potential,and the PV normalization is used to generate a convergent vacuum contribution in the thermodynamic potential.The model parameters are then redetermined.The solution of the equilibrium equation is applied to determine changes of the condensateas with temperature and chemical potential,and then the influence of vacuum contribution on the chiral phase transition is explained by the condensation and phase diagram.For zero chemical potential,the addition of vacuum contribution will make the condensaes dissolve slowly,and the temperature and chemical potential corresponding to the phase transition boundary will be higher;the increase of the mσ will make the quark condensaes dissolve slowly.

关 键 词：夸克介子模型 真空贡献 奇异夸克 手征相变 

分 类 号：O572.33[理学—粒子物理与原子核物理]