Effects of initial-state dynamics on collective flow within a coupled transport and viscous hydrodynamic approach

Abstract : We evaluate the effects of preequilibrium dynamics on observables in ultrarelativistic heavy-ion collisions. We simulate the initial nonequilibrium phase within A MultiPhase Transport (AMPT) model, while the subsequent near-equilibrium evolution is modeled using (2+1)-dimensional relativistic viscous hydrodynamics. We match the two stages of evolution carefully by calculating the full energy-momentum tensor from AMPT and using it as input for the hydrodynamic evolution. With a shear viscosity to entropy density ratio of $0.12$, our model describes quantitatively a large set of experimental data on Pb+Pb collisions at the Large Hadron Collider(LHC) over a wide range of centrality: differential anisotropic flow $v_n(p_T) ~(n=2-6)$, event-plane correlations, correlation between $v_2$ and $v_3$, and cumulant ratio $v_2\{4\}/v_2\{2\}$.
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https://hal-cea.archives-ouvertes.fr/cea-01613944
Contributor : Emmanuelle de Laborderie <>
Submitted on : Tuesday, October 10, 2017 - 11:55:30 AM
Last modification on : Wednesday, January 23, 2019 - 2:39:04 PM

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Chandrodoy Chattopadhyay, Rajeev S. Bhalerao, Jean-Yves Ollitrault, Subrata Pal. Effects of initial-state dynamics on collective flow within a coupled transport and viscous hydrodynamic approach. 2017. ⟨cea-01613944⟩

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