We obtain the brane setup describing 3d N = 2 dualities for U Sp(2N c ) and U (N c ) SQCD with monopole superpotentials. This classification follows from a complete analysis of affine and twisted affine compactifications from 4d. The analysis leads to a new duality for the unitary case that has been previously overlooked in the literature. We check this by matching of the three sphere partition function of the two sides of this new duality and find a perfect agreement. Furthermore we use the partition function to predict new 3d N = 2 dualities for SQCD with monopole superpotentials and tensorial matter.
arXiv:1901.07559v1 [hep-th] 22 Jan 2019
ContentsOur construction is based on [8]: we consider a brane setup that engineers a 4d theory, with a compact space-like direction. Typically there are D4, D6 and NS branes in such setups. In addition O4 and O6 planes are added, in order to extend the analysis to the cases with real gauge groups and/or tensorial matter. We perform T-duality along the compact direction and study the effective 3d models in the T-dual configuration. The 3d dualities follow from the transition through infinite coupling obtained after an opportune move among the NS branes [12]. Such move modifies the number of D3 branes that engineer the gauge sectors of the effective 3d models. A common configuration corresponds to having stacks of D3 branes separated along the compact direction. This separation is associated to the presence of D1 branes, that engineer the presence of interactions involving monopole operators. The simplest cases correspond, at the algebraic level, to affine Dynkin diagrams, and the affine root is associated to a linear monopole superpotential, usually referred to as the Kaluza-Klein monopole superpotential. The construction has been shown in [10] to reproduce also the linear monopole superpotentials introduced in [16] for U (1) models and then extended in [21] to the U (N c ) case.Here we introduce in this description a new ingredient, in order to reproduce also the dualities with quadratic monopole superpotentials discussed in [35]. It consists in considering compactifications with a twist by an outer automorphism of the gauge algebra. Eventually we observe that D-branes provide a classification principle for the 3d N = 2 dualities with monopole superpotentials.The general setup is introduced in section 2, where we discuss general aspects of the affine and the twisted affine algebras. In section 3 we discuss the dualities with real gauge groups. We observe that by considering the affine and the twisted affine compactifications we can reproduce the various dualities obtained in [1,35,36] for U Sp(2N c ) gauge theories involving monopole superpotentials. In section 4 we consider the case of U (N c ) gauge groups. In this case we reproduce all the known dualities studied in [21,35]. Furthermore we obtain a model that has been previously overlooked in the literature. This corresponds to SQCD with a linear (quadratic) monopole plus a quadratic (linear) anti-monopole superpotential....