Divergence-type 2+1 dissipative hydrodynamics applied to heavy-ion collisions

被引：58

作者：

Peralta-Ramos, J. ^{[1
]}

Calzetta, E.

机构：

[1] Univ Buenos Aires, Dept Fis, FCEyN, RA-1428 Buenos Aires, DF, Argentina

来源：

PHYSICAL REVIEW C | 2010年 / 82卷 / 05期

关键词：

ELLIPTIC FLOW; RELATIVISTIC THERMODYNAMICS; FREEZE-OUT; TRANSITION; VISCOSITY; SPECTRA; MATTER; ORDER;

D O I：

10.1103/PhysRevC.82.054905

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：

We apply divergence-type theory (DTT) dissipative hydrodynamics to study the 2 + 1 space-time evolution of the fireball created in Au+Au relativistic heavy-ion collisions at root sNN = 200 GeV. DTTs are exact hydrodynamic theories that do not rely on velocity gradient expansions and therefore go beyond second-order theories. We numerically solve the equations of motion of the DTT for Glauber initial conditions and compare the results with those of second-order theory based on conformal invariance (Baier-Romatschke-Son-Starinets model) and with data. We find that the charged-hadron minimum-bias elliptic flow reaches its maximum value at lower p(T) in the DTT, and that the DTT allows for a value of eta/s slightly larger than that of the BRSS. Our results show that the differences between viscous hydrodynamic formalisms are a significant source of uncertainty in the precise extraction of eta/s from experiments.

引用

页数：11

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