Shear viscosity in a perturbative quark-gluon plasma

被引：15

作者：

Fuini, John, III ^{[1
,2
]}

Demir, Nasser S. ^{[2
]}

Srivastava, Dinesh K. ^{[3
]}

Bass, Steffen A. ^{[2
]}

机构：

[1] Univ Texas San Antonio, San Antonio, TX 78249 USA

[2] Duke Univ, Dept Phys, Durham, NC 27708 USA

[3] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, India

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2011年 / 38卷 / 01期

关键词：

PARTON-CASCADES; COLLISIONS; PERSPECTIVE; DYNAMICS;

D O I：

10.1088/0954-3899/38/1/015004

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Among the key features of hot and dense QCD matter produced in ultra-relativistic heavy-ion collisions at RHIC is its very low shear viscosity, indicative of the properties of a near-ideal fluid, and a large opacity demonstrated by jet energy loss measurements. In this work, we utilize a microscopic transport model based on the Boltzmann equation with quark and gluon degrees of freedom and cross sections calculated from perturbative quantum chromodynamics to simulate an ideal quark-gluon plasma in full thermal and chemical equilibrium. We then use the Kubo formalism to calculate the shear viscosity to entropy-density ratio of the medium as a function of temperature and system composition. One of our key results is that the shear viscosity over entropy-density ratio eta/s becomes invariant to the chemical composition of the system when plotted as a function of energy-density instead of temperature.

引用

页数：10

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