Constraining the initial temperature and shear viscosity in a hybrid hydrodynamic model of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn></mml:mrow></mml:math>GeV Au+Au collisions using pion spectra, elliptic flow, and femtoscopic radii

A new framework for evaluating hydrodynamic models of relativistic heavy ion collisions has been developed. This framework, a comprehensive 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 ultrarelativistic quantum molecular dynamic (UrQMD) hadronic cascade. A range of initial temperatures and shear viscosity to entropy ratios were evaluated for four initial profiles, ${N}_{\mathrm{part}}$ and ${N}_{\mathrm{coll}}$ 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, ${N}_{\mathrm{part}}$ scaling with pre-equilibrium flow and ${N}_{\mathrm{coll}}$ scaling without were shown to provide a consistent description of all three measurements.

Перевод пока недоступен