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Vacua of Massive Hyper-Kahler Sigma Models with Non-Abelian Quotient
The Higgs branch of N=2 supersymmetric gauge theories with non-Abelian gauge
groups are described by hyper-Kahler (HK) nonlinear sigma models with potential
terms. With the non-Abelian HK quotient by U(M) and SU(M) gauge groups, we give
the massive HK sigma models that are not toric in the N=1 superfield formalism
and the harmonic superspace formalism. The U(M) quotient gives N!/[M! (N-M)!]
discrete vacua that may allow various types of domain walls, whereas the SU(M)
quotient gives no discrete vacua.Comment: 37 pages, one figure, final version to appear in Prog. Theor. Phy
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