Viscosity information from relativistic nuclear collisions: How perfect is the fluid observed at RHIC?

被引：926

作者：

Romatschke, Paul

Romatschke, Ulrike

机构：

[1] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

[2] Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.99.172301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Relativistic viscous hydrodynamic fits to Brookhaven Relativistic Heavy Ion Collider data on the centrality dependence of multiplicity, transverse, and elliptic flow for root s = 200 GeV Au + Au collisions are presented. For standard (Glauber-type) initial conditions, while data on the integrated elliptic flow coefficient v(2) are consistent with a ratio of viscosity over entropy density up to n/s similar or equal to s 0.16 data on minimum bias v(2) seem to favor a much smaller viscosity over entropy ratio, below the bound from the anti-de Sitter conformal field theory conjecture. Some caveats on this result are discussed.

引用

页数：4

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