Viscous hydrodynamics description of φ meson production in Au+Au and Cu+Cu collisions
Abstract
In the Israel-Stewart's theory of 2nd order dissipative hydrodynamics, we have simulated φ production in Au+Au and Cu+Cu collisions at sNN=200 GeV. Evolution of QGP fluid with viscosity over the entropy ratio η/s=0.25, thermalised at τi=0.2 fm, with initial energy density εi=5.1 GeV/fm3 explains the experimental data on φ multiplicity, integrated v2, mean pT, pT spectra and elliptic flow in central and mid-central Au+Au collisions. η/s=0.25 is also consistent with centrality dependence of φ pT spectra in Cu+Cu collisions. The central energy density in Cu+Cu collisions is εi=3.48 GeV/fm3.
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