利用格点量子色动力学研究手征平滑过渡温度和手征相变温度  

Chiral Crossover and Chiral Phase Transition Temperatures from Lattice QCD

作　　者：李胜泰 丁亨通[2] LI Shengtai;DING Hengtong(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Key Laboratory of Quark&Lepton Physics(MOE)and Institute of Particle Physics,Central China Normal University,Wuhan 430079,China)

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]华中师范大学“夸克与轻子”教育部重点实验室&粒子物理研究所,武汉430079

出　　处：《原子核物理评论》2020年第3期674-678,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(11947237,11775096)。

摘　　要：回顾了最近关于手征平滑过渡温度和手征相变温度的研究结果。首先给出了在零重子化学势能下的手征平滑过渡温度为156.5(1.5)MeV,其次,给出了在非零重子化学势能下手征相转变曲线的二阶及四阶曲率分别为0.012(4)和0.000(4)。接着讨论了在格点QCD中第一次得到的量子色动力学的手征相变温度。在热力学极限、连续极限及手征极限下,我们得到手征相变温度为132_(-6)^(+3)MeV。We review our recent studies on chiral crossover and chiral phase transition temperatures in this special issue.We will firstly present a lattice QCD based determination of the chiral crossover transition temperature at zero and nonzero baryon chemical potentialμB which is T_(pc)=(156.5±1.5)MeV.At nonzero temperature the curvatures of the chiral crossover transition line areκ_(2)^(B)=0.012(4)andκ_(4)^(B)=0.000(4)for the 2 nd and 4 th order ofμB/T.We will then present a first determination of chiral phase transition temperature in QCD with two degenerate,massless quarks and a physical strange quark.After thermodynamic,continuum and chiral extrapolations we find the chiral phase transition temperature T_(c)^(0)=132_(-6)^(+3)MeV.

关 键 词：手征平滑过渡温度 手征相变温度 QCD临界点 格点量子色动力学 

分 类 号：O571.53[理学—粒子物理与原子核物理]