D0-branes, constrained instantons and D = 4 Super Yang-Mills theories Original Research Article

We consider in more detail the role of D0-branes as instantons in the construction of SU(N) Super Yang-Mills and Super QCD theories in four space-time dimensions with D4-, D6- and NS branes. In particular, we show how the D0-branes describe both the exact and constrained instantons and reproduce the correct pattern of lifting of zero-modes on the various branches of these models.