Abstract
Supersymmetric QCD is studied by an effective lagrangian method. When all flavours are massive supersymmetric vacua, reproducing the known value of Witten's index, do exist and decoupling of heavy flavours occurs When one or more flavours become massless, some chirality breaking order parameters run to infinity suggesting a non-smooth zero mass limit, in contrast with the case of ordinary QCD. Possible implications of these results on chiral and/or supersymmetry breaking patterns in the massless theory are briefly discussed.
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