Kinetic Freeze-Out Temperature and Transverse Flow Velocity in Au-Au Collisions at RHIC-BES Energies
Bao-Chun Li (Institute of Theoretical Physics & Department of Physics & State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan, Shanxi 030006, China)
; Muhammad Waqas (Institute of Theoretical Physics & Department of Physics & State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan, Shanxi 030006, China)
By using the method of data-driven reanalysis, the midrapidity transverse momentum spectra of charged hadrons (, , and ) produced in central and peripheral gold-gold (Au-Au) collisions from the Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider (RHIC) are fitted by using the blast-wave model with the Boltzmann-Gibbs statistics. The model results are in agreement with the experimental data measured by the STAR Collaboration at the RHIC-BES energies. We observe that the kinetic freeze-out temperature , transverse flow velocity , mean transverse momentum , and initial temperature increase with collision energy as well as with event centrality.