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arxiv: 1208.0897 · v3 · pith:4QX36EBFnew · submitted 2012-08-04 · ⚛️ nucl-th · nucl-ex

Constraining the initial temperature and shear viscosity in a hybrid hydrodynamic model of sqrt{s_(NN)}=200 GeV Au+Au collisions using pion spectra, elliptic flow, and femtoscopic radii

classification ⚛️ nucl-th nucl-ex
keywords flowinitialmodelcollisionshydrodynamicpre-equilibriumscalingwere
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A new framework for evaluating hydrodynamic models of relativistic heavy ion collisions has been developed. This framework, a Comprehesive Heavy Ion Model Evaluation and Reporting Algorithm (CHIMERA) has been implemented by augmenting UVH 2+1D viscous hydrodynamic model with eccentricity fluctuations, pre-equilibrium flow, and the Ultra-relativistic Quantum Molecular Dynamic (UrQMD) hadronic cascade. A range of initial temperatures and shear viscosity to entropy ratios were evaluated for four initial profiles, $N_{part}$ and $N_{coll}$ scaling with and without pre-equilibrium flow. The model results were compared to pion spectra, elliptic flow, and femtoscopic radii from 200 GeV Au+Au collisions for the 0--20% centrality range.Two sets of initial density profiles, $N_{part}$ scaling with pre-equilibrium flow and $N_{coll}$ scaling without were shown to provide a consistent description of all three measurements.

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