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Title: | Effects of initial-state dynamics on collective flow within a coupled transport and viscous hydrodynamic approach |
Authors: | Chattopadhyay, Chandrodoy BHALERAO, RAJEEV S. Ollitrault, Jean-Yves Pal, Subrata Dept. of Physics |
Keywords: | Dynamics on collective flow Hydrodynamic approach Anisotropic flow Hydrodynamics 2018 |
Issue Date: | Mar-2018 |
Publisher: | American Physical Society |
Citation: | Physical Review C, 97(3), 034915. |
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. We find that when the preequilibrium evolution is taken into account, final-state observables are insensitive to the switching time from AMPT to hydrodynamics. Unlike some earlier treatments of preequilibrium dynamics, we do not find the initial shear viscous tensor to be large. 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 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 } . |
URI: | http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/3872 https://doi.org/10.1103/PhysRevC.97.034915 |
ISSN: | 2469-9985 2469-9993 |
Appears in Collections: | JOURNAL ARTICLES |
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