A new family of exact analytic viscous hydrodynamic solutions is derived for Hubble-flow fireballs, in which shear viscosity cancels and only bulk viscosity affects the temperature evolution.
Indication of quark deconfinement and evidence for a Hubble flow in 130 and 200 GeV Au+Au collisions
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abstract
Buda-Lund hydro model fits are compared to BRAHMS, PHENIX, PHOBOS and STAR data on identified particle spectra, two-particle Bose-Einstein or HBT correlations, charged particle pseudorapidity distributions and pseudorapidity as well as p_t dependent elliptic flow in sqrt(s_NN) = 130 and 200 GeV Au+Au collisions at RHIC. Preliminary results indicate that 7/8-th of the particle emitting volume is rather cold, with surface temperature of 105 MeV, but the temperature has a distribution and the most central 1/8-th of the volume is superheated to temperatures above the critical value, T(x) > T_c = 172 \pm 3 MeV.
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A simple family of solutions of relativistic viscous hydrodynamics for fireballs with Hubble flow and ellipsoidal symmetry
A new family of exact analytic viscous hydrodynamic solutions is derived for Hubble-flow fireballs, in which shear viscosity cancels and only bulk viscosity affects the temperature evolution.