Dissipation and elliptic flow at RHIC

Details Dissipation and elliptic flow at RHIC Dissipation and elliptic flow at RHIC

2004-04-22

arxiv.org/abs/nucl-th/0404065v1

Phys.Rev.Lett. 94 (2005) 012302

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 EPS figs

Scientific paper

10.1103/PhysRevLett.94.012302

We compare elliptic flow evolution from ideal hydrodynamics and covariant parton transport theory, and show that, for conditions expected at RHIC, dissipation significantly reduces elliptic flow even for extreme parton cross sections and/or densities sigma_gg * dN/d\eta(b=0) ~ 45 mb * 1000. The difference between transport and hydrodynamic elliptic flow is established rather early during the evolution of the system, but the buildup of elliptic flow is surprisingly insensitive to the choice of the initial (formation or thermalization) time in both models.

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