Beam energy scan using a viscous hydro+cascade model

2013/10/02 by Iu. A. Karpenko, M. Bleicher, P. Huovinen +1 · 1 citation
Physics and Astronomy · #nucl-th #hep-ph

paper · pdf · doi:10.1088/1742-6596/509/1/012067

published as J. Phys.: Conf. Ser. 509 012067 (2014) · 4 pages, to appear in the proceedings of Strangeness in Quark Matter 2013 conference

arxiv created 2013/10/02 · arxiv updated 2014/05/27

Abstract

Following the experimental program at BNL RHIC, we perform a similar "energy scan" using 3+1D viscous hydrodynamics coupled to the UrQMD hadron cascade, and study the collision energy dependence of pion and kaon rapidity distributions and m_T-spectra, as well as charged hadron elliptic flow. To this aim the equation of state for finite baryon density from a Chiral model coupled to the Polyakov loop is employed for hydrodynamic stage. 3D initial conditions from UrQMD are used to study gradual deviation from boost-invariant scaling flow. We find that the inclusion of shear viscosity in the hydrodynamic stage of evolution consistently improves the description of the data for Pb-Pb collisions at CERN SPS, as well as of the elliptic flow measurements for Au-Au collisions in the Beam Energy Scan (BES) program at BNL RHIC. The suggested value of shear viscosity is η/s≥0.2 for √s_NN=6.3…39 GeV.

Cited by

• 3+1 dimensional viscous hydrodynamics at high baryon densities

Related

• Anisotropic flow decorrelation in heavy-ion collisions at RHIC-BES energies with 3D event-by-event viscous hydrodynamics
• Beam energy dependence of the viscous damping of anisotropic flow
• Relativistic Viscous Hydrodynamics for High Energy Heavy Ion Collisions
• Viscosities of the Baryon-Rich Quark-Gluon Plasma from Beam Energy Scan Data
• Collision Energy Evolution of Elliptic and Triangular Flow in a Hybrid Model