N=2 Supersymmetric Gauge Theories, Branes and Orientifolds
Karl Landsteiner, Esperanza Lopez, David A. Lowe
Abstract
Starting with configurations of fourbranes, fivebranes, sixbranes and orientifolds in Type IIA string theory we derive via M-theory the curves solving N=2 supersymmetric gauge theories with gauge groups SO(N) and Sp(2N). We also obtain new curves describing theories with product gauge groups. A crucial role in the discussion is played by the interaction of the orientifolds with the NS-fivebranes.