Abstract
We revisit the study of singular points in the Coulomb branch of N = 2 SQCD in four dimensions with gauge group SU(N) and odd number of flavors. For certain choices of the mass parameters these vacua are not lifted by a mass term for the chiral multiplet in the adjoint representation. By using recent results about the M5 brane description of N = 1 theories we study the resulting vacua and argue that the low-energy effective theory has a simple Lagrangian description involving a free chiral multiplet in the adjoint representation of the flavor symmetry group, a system somewhat reminiscent o f the standard low-energy pion description of the real-world QCD. This fact is quite remarkable in view of the fact that the underlying N = 2 SCFT (the Argyres-Douglas systems) are strongly-coupled non-local theories of quarks and monopoles.
Highlights
For certain choices of the mass parameters these vacua are not lifted by a mass term for the chiral multiplet in the adjoint representation
By using recent results about the M5 brane description of N = 1 theories we study the resulting vacua and argue that the low-energy effective theory has a simple Lagrangian description involving a free chiral multiplet in the adjoint representation of the flavor symmetry group, a system somewhat reminiscent of the standard low-energy pion description of the real-world QCD
The special feature of the quadratic superpotential is that the resulting IR effective theory turns out to be extremely simple: after the N = 1 deformation the AD theory flows to a theory describing a free chiral multiplet in the adjoint representation of the global symmetry group of the underlying gauge theory
Summary
We shall deform the gauge theories mentioned in the previous section by adding a mass term for the chiral multiplet in the adjoint (μ d2θ Tr Φ2).
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