Moving Forward to Constrain the Shear Viscosity of QCD Matter

被引：69

作者：

Denicol, Gabriel ^{[1
]}

Monnai, Akihiko ^{[2
]}

Schenke, Bjorn ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[2] Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 21期

关键词：

NONLINEAR GLUON EVOLUTION; COLOR GLASS CONDENSATE; SCATTERING; FLOW; EQUATION; PROTON; QUARK; STATE;

D O I：

10.1103/PhysRevLett.116.212301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that measurements of rapidity differential anisotropic flow in heavy-ion collisions can constrain the temperature dependence of the shear viscosity to entropy density ratio eta/s of QCD matter. Comparing results from hydrodynamic calculations with experimental data from the RHIC, we find evidence for a small eta/s approximate to 0.04 in the QCD crossover region and a strong temperature dependence in the hadronic phase. A temperature independent eta/s is disfavored by the data. We further show that measurements of the event-by-event flow as a function of rapidity can be used to independently constrain the initial state fluctuations in three dimensions and the temperature dependent transport properties of QCD matter.

引用

页数：6

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