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
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.
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页数:6
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