Inside an enhançon: monopoles and dual Yang–Mills theory Original Research Article

In this paper we study wrapped brane configurations that give rise to three-dimensional pure Yang–Mills theory with eight supercharges. The corresponding supergravity solution is singular and it was conjectured that the singularity is removed by an enhançon mechanism. Instead, we incorporate non-perturbative gauge fields into supergravity and find a smooth solution for these configurations. Along the way we derive a non-Abelian supergravity Lagrangian for type IIA on K3 and explicit formulae for the toroidal reduction of the heterotic string with non-Abelian gauge fields. We proceed to analyze the duality with Yang–Mills theory and find that the dual background is a monopole configuration in little string theory.