Elliptic flow from partially thermalized heavy-ion collisions
Ulrich Heinz, Stephen M. H. Wong
Abstract
We study to what extent the measured elliptic flow at RHIC constrains viscous deviations from ideal hydrodynamics. We solve a toy model where only transverse momenta are thermalized while the system undergoes longitudinal free-streaming. We show that RHIC data exclude such a model and thus require fast 3-dimensional thermalization.
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