Estimation of shear viscosity based on transverse momentum correlations

Abstract

Event anisotropy measurements at RHIC suggest the strongly interacting matter created in heavy ion collisions flows with very little shear viscosity. Precise determination of "shear viscosity-to-entropy" ratio is currently a subject of extensive study. We present preliminary results of measurements of the evolution of transverse momentum correlation function with collision centrality of $Au+Au$ interactions at $\sqrt{s_{NN}}$ = 200 GeV. We compare two differential correlation functions, namely {\it inclusive} and a differential version of the correlation measure $\tilde{C}$ introduced by Gavin $et.al.$. These observables can be used for the experimental study of the shear viscosity per unit entropy.

4 pages, 8 figures, proceedings re-submitted for Quark Matter 2009 conference. This paper contains revision of one of the figures

References in corpus (4)

• Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
• The centrality dependence of elliptic flow, the hydrodynamic limit, and the viscosity of hot QCD
• Measuring Shear Viscosity Using Transverse Momentum Correlations in Relativistic Nuclear Collisions
• Methods for the Study of Transverse Momentum Differential Correlations

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