There are many ways to motivate need of supersymmetries, However, the introduction of the supersymmetries in realistic field theory models always accompanies the problem of how to break them at low energy, In this sense, it should be celebrated that Intriligator, Seiberg and Shih [2] found recently that one of the simplest supersymmetric field theories, the supersymmetric QCD (SQCD), admits supersymmetry-breaking meta-stable vacua via the Seiberg's duality.
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