Coulomb Interaction Effects on Pion Production in Au+Au Collisions at Relativistic Energies

Figure 6

The kinetic freeze-out radius (solid symbols) as a function of collision centrality for Au+Au collisions at 7.7 GeV (black symbols), 11.5 GeV (blue), and 19.6 GeV (red symbols). The open symbols are the chemical freeze-out radii obtained by STAR experiment [14].