Curvature of Pseudocritical Transition Line for Two-Flavor QCD with Improved Kogut–Susskind Quarks
Liang-Kai Wu1** , Xiang-Fei Meng2 , Fa-Ling Zhang1
1 Faculty of Science, Jiangsu University, Zhenjiang 2120132 National Supercomputer Center, Tianjin 300457
Abstract ：The results on the curvature of a pseudocritical transition line for two-flavor QCD through lattice simulations are presented. The simulations are carried out with Symanzik-improved gauge action and Asqtad fermion action on a lattice $12^3\times4$ at quark mass $am=0.010$. At the imaginary chemical potentials $a\mu_{_{\rm I}}=0.050$, 0.150, 0.200, 0.225 and 0.250, we investigate the chiral condensate $\bar\psi\psi$, plaquette variable $P$ and imaginary part of Polyakov loop ${\rm Im}(L)$ and their susceptibilities. Analytic continuation from an imaginary chemical potential to a real one is used to obtain the expression for transition temperature as a function of the chemical potential. The curvature is 0.0326(46).
收稿日期: 2016-11-02
出版日期: 2017-03-21
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2017, Vol. 34 
