Existence of the critical point in finite density lattice QCD

被引：73
作者：
Ejiri, Shinji [1 ]
机构：
[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
来源：
PHYSICAL REVIEW D | 2008年 / 77卷 / 01期
关键词：
D O I：
10.1103/PhysRevD.77.014508
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We propose a method to probe the nature of phase transitions in lattice QCD at finite temperature and density, which is based on the investigation of an effective potential as a function of the average plaquette. We analyze data obtained in a simulation of two-flavor QCD using p4-improved staggered quarks with bare quark mass m/T=0.4 and find that a first order phase transition line appears in the high density regime for mu(q)/T greater than or similar to 2.5. We also discuss the difference between the phase structures of QCD with nonzero quark chemical potential and nonzero isospin chemical potential.
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页数：14
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