Kinetic Freeze-Out Temperature and Transverse Flow Velocity in Au-Au Collisions at RHIC-BES Energies

By using the method of data-driven reanalysis, the midrapidity transverse momentum ðpTÞ spectra of charged hadrons (π+, K+,
and p) 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 ðT0Þ, transverse flow velocity ðβTÞ, mean transverse momentum ðhpTiÞ,
and initial temperature ðTi
Þ increase with collision energy as well as with event centrality