Speaker
Iurii Karpenko
(Frankfurt Institute for Advanced Studies)
Description
We present the first application of state-of-the-art 3D viscous hybrid model to heavy ion collisions at RHIC Beam Energy Scan (BES) energy range $\sqrt{s}=7.7\dots200$ GeV. The model employs the hadron transport approach UrQMD for the early and late non-equilibrium stages of the reaction, and 3+1 dimensional viscous hydrodynamics for the hot and dense quark-gluon plasma stage. It includes the equation of motion for finite baryon number, and employs an equation of state with finite net-baryon density to allow for calculations in a large range of beam energies. The parameter space of the model is explored, and constrained by comparison with the experimental data for bulk observables from SPS and the phase I BES at RHIC. The favored value of the shear viscosity coefficient over entropy density ratio $\eta/s$ in the fluid phase depends on collision energy. It increases with decreasing collision energy, which may indicate that $\eta/s$ of the quark-gluon plasma increases with increasing baryochemical potential
$\mu_B$.
Ref: Iu.A. Karpenko, P. Huovinen, H. Petersen, M. Bleicher, Phys. Rev. C
91, 064901 (2015)
| On behalf of collaboration: | NONE |
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Authors
Hannah Petersen
Iurii Karpenko
(Frankfurt Institute for Advanced Studies)
Marcus Bleicher
(Uni Frankfurt)
Pasi Huovinen
(Goethe-Universität)
