${\Sigma }^{-}/{\Sigma }^{+}$ ratio as a candidate for probing the density dependence of the symmetry potential at high nuclear densities

Qingfeng LI, Zhuxia LI, Enguang Zhao +1

Based on the UrQMD model, we have investigated the influence of the symmetry potential on the negatively and positively charged $\pi$ and $\Sigma$ hyperon production ratios in heavy ion c…