A DYNAMICAL, CONFINING MODEL AND BULK VISCOSITY OF QCD MATTER AT FINITE TEMPERATURE

被引：2
作者：
Jiang, Yu [1 ]
Wang, Bin [1 ]
Sun, Wei-Min [1 ,2 ]
Zong, Hong-Shi [1 ,2 ]
机构：
[1] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
[2] Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China
来源：
MODERN PHYSICS LETTERS A | 2010年 / 25卷 / 20期
基金：
中国国家自然科学基金;
关键词：
Bulk viscosity; quantum chromodynamics (QCD); Dyson-Schwinger equations; DYSON-SCHWINGER EQUATIONS; QUARK-GLUON PLASMA; PERSPECTIVE; HADRONS;
D O I：
10.1142/S0217732310033293
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this paper we calculate the thermodynamic quantities and bulk viscosity in a simple confining Dyson-Schwinger equation model of two-flavor QCD. Our results show that the velocity of sound shows a sharp increase around (T) over bar = T/eta similar to 0.1 (eta = 1.06 GeV) and at the phase transition temperature (T) over bar (c) = 1/2 pi approximate to 0.159 the derivative of the velocity with respect to T has a distinct change. It is also found that the trace anomaly increases sharply below the phase transition point and the bulk viscosity has a peak located at (T) over bar similar to 0.12 which is almost the same as the peak of the trace anomaly. A comparison of our results with those in the previous literature is given.
引用
收藏
页码：1689 / 1696
页数：8
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