Directed flow of transported and non-transported protons in Au+Au collisions from UrQMD model

Abstract

The directed flow of inclusive, transported and non-transported (including produced) protons, as well as antiprotons, has been studied in the framework of Ultra-Relativistic Quantum Molecular Dynamics approach (UrQMD model) for Au+Au collisions at\surdsNN =7.7, 11.5, 19.6, 27, 39, 62.4 and 200 GeV. The rapidity, centrality and energy dependence of directed flow for various proton groups are presented. It is found that the integrated directed flow decreases monotonically as a function of collision energy for\surdsNN =11.5 GeV and beyond. However, the sign-change of directed flow of inclusive protons, seen in experimental data as a function of centrality and collision energy, can be explained by the competing effect of directed flow between transported and non-transported protons. Similarly the difference in directed flow between protons and antiprotons can be explained. Our study offers a conventional explanation on the cause of the v1 sign-change other than the antiflow component of protons alone which is argued to be linked to a phase transition.

5 pages,5 figures

References in corpus (5)

• Directed flow in ultrarelativistic heavy-ion collisions
• System-size independence of directed flow at the Relativistic Heavy-Ion Collider
• Directed Flow of Identified Particles in Au + Au Collisions at $\sqrtsNN = 200$ GeV at RHIC
• Pseudorapidity shape of elliptic flow as signature for fast equilibration in relativistic heavy-ion collisions at energies up to sqrt(s) = 200 GeV
• Energy Dependence of Directed Flow in Au+Au Collisions from a Multi-phase Transport Model

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• Directed flow and global polarization in Au+Au collisions across energies covered by the beam energy scan at RHIC
• Testing the impact of electromagnetic fields on the directed flow of constituent quarks in heavy-ion collisions
• Elliptic flow of transported and non-transported proton in Au+Au collisions within the UrQMD model
• Elliptic flow splitting between protons and antiprotons from hadronic potentials
• Dependence on beam energy and nuclear equation of state dependence of anisotropic flow and particle production in low-energy heavy-ion collisions
• Examining the influence of hadronic interactions on the directed flow of identified particles in RHIC Beam Energy Scan energies using UrQMD model
• Exploring Electromagnetic Field Effects and Constraining Transport Parameters of QGP using STAR BES-II data