Kinetic Freeze-out and Radial Flow in 11.6 A GeV Au + Au Collisions

We study the kinetic freeze-out conditions of hadrons in Au+Au collisions at 11.6 A GeV/c using different parametrizations of an expanding thermal fireball. We take into account the available double differential momentum spectra of a variety of particle species, covering a large fraction of the total momentum space. The overall fit to the data is very good and indicates a relatively low kinetic freeze-out temperature of approximately 90 MeV with an average transverse expansion velocity at midrapidity of approximately 0.5 c.