Improved matrix-model calculation of the N=2 prepotential
arXiv:hep-th/0403129 · doi:10.1088/1126-6708/2004/04/033
Abstract
We present a matrix-model expression for the sum of instanton contributions to the prepotential of an N=2 supersymmetric U(N) gauge theory, with matter in various representations. This expression is derived by combining the renormalization-group approach to the gauge theory prepotential with matrix-model methods. This result can be evaluated order-by-order in matrix-model perturbation theory to obtain the instanton corrections to the prepotential. We also show, using this expression, that the one-instanton prepotential assumes a universal form.
20 pages, LaTeX, 2 figures