Simulation study of elliptic flow of charged hadrons produced in Au + Au collisions at energies available at the Facility for Antiproton and Ion Research

摘要

Centrality and system geometry dependence of azimuthal anisotropy of charged hadrons measured in terms of the elliptic flow parameter are investigated using Au+Au event samples at incident beam energy 20A and 40A GeV generated by ultrarelativistic quantum molecular dynamics (UrQMD) and a multiphase transport (AMPT) models. The Monte Carlo–Glauber model is employed to estimate the eccentricity of the overlapping zone at an early stage of the collisions. Anisotropies present both in the particle multiplicity distribution and in the kinetic radial expansion are examined by using standard statistical and phenomenological methods. In the context of the upcoming Compressed Baryonic Matter experiment to be held at the Facility for Antiproton and Ion Research (FAIR), the present set of simulated results provide us not only with an opportunity to examine the expected collective behavior of hadronic matter at high baryon density and moderate temperature, but when compared with similar results obtained from Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) experiments, they also allow us to investigate how anisotropy of hadronic matter may differ or agree with its low-baryon-density and high-temperature counterpart.