Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/3872
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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