New recursion relations for M2-brane matrix models

A bstract In this paper we investigate the finite N exact values of the S 3 partition function of the N N = 4 super Yang-Mills theory with one adjoint hypermultiplet and N f fundamental hypermultiplets, which describes N M2-branes on C² C²/Z₍_₅ ℂ 2 × ℂ 2 / ℤ N f, with mass and FI deformations. We claim that the grand canonical sum of the partition function obeys a bilinear difference relation with respect to the shifts of the mass parameters of the fundamental hypermultiplets, which results in a new recursion relation for the partition function with respect to N. As an application, we also determine the analytic expression for the leading 1/ N non-perturbative correction to the free energy of these models, which would correspond holographically to the contribution from an M2-brane wrapped on a 3d volume in the internal space of AdS 4 × S 7 / Z₍_₅ ℤ N f.