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By using the UrQMD model we have investigated the influence of the symmetry potential on the ratios between negative and positive charged pions and Σ hyperons in central collisions of 132Sn+132Sn and 112Sn+112Sn at energies 1.5, 2.5 and 3.5 AGeV. Two for
By using the UrQMD model we have investigated the influence of the symmetry potential on the ratios between negative and positive charged pions and Σ hyperons in central collisions of 132Sn + 132Sn and 112Sn + 112Sn at energies 1.5, 2.5 and 3.5 AGeV. Two for