The centrality dependence of ν/&z.epsiv;: the ideal hydro limit and η/s
Abstract
The large elliptic flow observed at RHIC is considered to be evidence for almost perfect liquid behavior of the strongly coupled quark-gluon plasma produced in the collisions. In these proceedings we present a two parameter fit for the centrality dependence of the elliptic flow ν scaled by the spatial eccentricity &z.epsiv;. We show by comparing to viscous hydrodynamical calculations that these two parameters are in good approximation proportional to the shear viscosity over entropy ratio η/s and the ideal hydro limit of the ratio ν/&z.epsiv;.
- Publication:
-
Nuclear Physics A
- Pub Date:
- November 2009
- DOI:
- 10.1016/j.nuclphysa.2009.10.103
- arXiv:
- arXiv:0908.0403
- Bibcode:
- 2009NuPhA.830..463M
- Keywords:
-
- Nuclear Experiment
- E-Print:
- 4 pages, 8 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee - final version without line numbers