Hydrodynamic simulation of elliptic flow
P. F. Kolb, J. Sollfrank, P. V. Ruuskanen, U. Heinz
Abstract
We use a hydrodynamic model to study the space-time evolution transverse to the beam direction in ultrarelativistic heavy-ion collisions with nonzero impact parameters. We focus on the influence of early pressure on the development of radial and elliptic flow. We show that at high energies elliptic flow is generated only during the initial stages of the expansion while radial flow continues to grow until freeze-out. Quantitative comparisons with SPS data from semiperipheral Pb+Pb collisions suggest the applicability of hydrodynamical concepts already ≈ 1 fm/c after impact.
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