Revisit of directed flow in relativistic heavy-ion collisions from a multiphase transport model

Abstract

We have revisited several interesting questions on how the rapidity-odd directed flow is developed in relativistic ${}^{197}$Au+${}^{197}$Au collisions at $\sqrt{s_{NN}}$ = 200 and 39 GeV based on a multiphase transport model. As the partonic phase evolves with time, the slope of the parton directed flow at midrapidity region changes from negative to positive as a result of the later dynamics at 200 GeV, while it remains negative at 39 GeV due to the shorter life time of the partonic phase. The directed flow splitting for various quark species due to their different initial eccentricities is observed at 39 GeV, while the splitting is very small at 200 GeV. From a dynamical coalescence algorithm with Wigner functions, we found that the directed flow of hadrons is a result of competition between the coalescence in momentum and coordinate space as well as further modifications by the hadronic rescatterings.

8 pages, 8 figures, version after major revision

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Cited by in corpus (12)

• Bulk Properties of the System Formed in Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 14.5 GeV
• Longitudinal distribution of initial energy density and directed flow of charged particles in relativistic heavy-ion collisions
• Splitting of proton-antiproton directed flow in relativistic heavy-ion collisions
• Energy dependence study of directed flow in Au+Au collisions using an improved coalescence in AMPT model
• Directed flow of open charm in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV using a quark coalescence model
• Directed flow and global polarization in Au+Au collisions across energies covered by the beam energy scan at RHIC
• Hadronization using the Wigner function approach for a multiphase transport model
• Directed flow in an extended multiphase transport model
• Elliptic flow of hadrons via quark coalescence mechanism using Boltzmann transport equation for Pb+Pb collision at $\sqrt{s_{NN}}$=2.76 TeV
• Hydrodynamic simulations of directed flow for light hadrons in Au+Au and isobar collisions $\sqrt{s_{\text{NN}}}=$ 200 GeV
• Probing the profile of bulk matter in p+Pb collisions via directed flow of heavy quarks
• System size dependence of charged hadrons directed flow at $\sqrt{s_{NN}}$ = 200 GeV using a multi-phase transport model