Strongly Coupled N=1 Supersymmetric SO(Nc) Gauge Theories without Magnetic Degrees of Freedom
Abstract
In strongly coupled supersymmetric SO(Nc) gauge theories with Nf-quarks for Nc-2<=Nf(<=3(Nc-2)/2), their low-energy physics can be described by Nambu-Goldstone superfields associated with dynamical flavor symmetry breaking, which should be compared with the absence of flavor symmetry breaking in the conventional description in terms of magnetic degrees of freedom. The presence of the flavor symmetry breaking is confirmed by the well-known instanton effects in SO(Nc) with Nf=Nc-2, which are also described by our proposed effective superpotential. For Nf>=Nc-1, our effective superpotentials utilize baryonic configurations as well as mesons composed of two quarks. The baryonic configurations are supplied by "diquarks" made of Nc-1 quarks for Nf=Nc-1 and by baryons composed of Nc quarks for Nc>=Nf. It is argued that our effective superpotentials exhibit the holomorphic decoupling property, the anomaly-matching property and correct description of instanton effects in SO(Nc) when Nf-Nc+2 quarks become massive if Nf>=Nc-1.
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