Causal Viscous Hydrodynamics for Central Heavy-Ion Collisions II: Meson Spectra and HBT Radii

Details Causal Viscous Hydrodynamics for Central Heavy-Ion Collisions II: Meson Spectra and HBT Radii Causal Viscous Hydrodynamics for Central Heavy-Ion Collisions II: Meson Spectra and HBT Radii

2007-01-11

arxiv.org/abs/nucl-th/0701032v2

Eur.Phys.J.C52:203-209,2007

Physics

Nuclear Physics

Nuclear Theory

10 pages, 6 figures; v2: bug corrected, minor changes in results

Scientific paper

10.1140/epjc/s10052-007-0354-z

Causal viscous hydrodynamic fits to experimental data for pion and kaon transverse momentum spectra from central Au+Au collisions at \sqrt{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\simeq 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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