Álvarez-Gaumé, Luis; Mariño, Marcos More on softly broken \(N=2\) QCD. (English) Zbl 1161.81420 Int. J. Mod. Phys. A 12, No. 5, 975-1002 (1997). Summary: We extend previous work on the soft breaking of \(N = 2\) supersymmetric QCD. We present the formalism for the breaking due to a dilaton spurion for a general gauge group and obtain the exact effective potential. We obtain some general features of the vacuum structure in the pure \(\text{SU}(N)\) Yang-Mills theory and we also derive a general mass formula for this class of theories, in particular we present explicit results for the mass spectrum in the \(\text{SU}(2)\) case. Finally we analyze the vacuum structure of the \(\text{SU}(2)\) theory with one massless hypermultiplet. This theory presents dyon condensation and a first order phase transition in the supersymmetry breaking parameter driven by nonmutually local BPS states. This could be a hint of Argyres-Douglas-like phases in nonsupersymmetric gauge theories. Cited in 4 Documents MSC: 81T60 Supersymmetric field theories in quantum mechanics 81R40 Symmetry breaking in quantum theory 81T13 Yang-Mills and other gauge theories in quantum field theory 81V05 Strong interaction, including quantum chromodynamics PDFBibTeX XMLCite \textit{L. Álvarez-Gaumé} and \textit{M. Mariño}, Int. J. Mod. Phys. A 12, No. 5, 975--1002 (1997; Zbl 1161.81420) Full Text: DOI arXiv