Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 52, Issue 1, Pages 203-209Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-007-0354-z
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Causal viscous hydrodynamic fits to experimental data for pion and kaon transverse momentum spectra from central Au + Au collisions at root s(NN) = 200 GeV are presented. Starting the hydrodynamic evolution at 1 fm/c and using small values for the relaxation time, reasonable fits up to moderate ratios, eta/s similar or equal to 0.4, can be obtained. It is found that a percentage of roughly 50 eta/s to 75 eta/s of the final meson multiplicity is due to viscous entropy production. Finally, it is shown that with increasing viscosity, the ratio of HBT radii R-out/R-side approaches and eventually matches the experimental data.
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