What information can we obtain from the yield ratio ${\pi }^{-}/{\pi }^{+}$ in heavy-ion collisions ?

T. Osada, S. Sano, M. Biyajima +1

The recently reported data on the yield ratio ${\pi }^{-}/{\pi }^{+}$ in central rapidity region of heavy-ion collisions are analyzed by theoretical formula which accounts for Coulomb interactio…