Nearly perfect fluid in Au+Au collisions at RHIC

Details Nearly perfect fluid in Au+Au collisions at RHIC Nearly perfect fluid in Au+Au collisions at RHIC

2009-09-02

arxiv.org/abs/0909.0391v2

Phys.Lett.B681:418-422,2009

Physics

Nuclear Physics

Nuclear Theory

5 pages, 6 figures. Version accepted for publication in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2009.10.068

In the Israel-Stewart's theory of dissipative hydrodynamics, we have analysed the STAR data on $\phi$ meson production in Au+Au collisions at $\sqrt{s}$=200 GeV. From a simultaneous fit to $\phi$ mesons multiplicity, mean $p_T$ and integrated $v_2$, we obtain a phenomenological estimate of QGP viscosity, $\eta/s =0.07 \pm 0.03 \pm 0.14$, the first error is due to the experimental uncertainty in STAR measurements, the second reflects the uncertainties in initial and final conditions of the fluid.

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