Towards the supersymmetric Standard Model from intersecting D6-branes on the image orientifold Original Research Article

We construct image supersymmetric fractional branes on the image orientifold. Intersecting stacks of such branes are needed to build a supersymmetric Standard Model. If image are the stacks that generate the image and image gauge particles, then, in order to obtain just the chiral spectrum of the (supersymmetric) Standard Model (with non-zero Yukawa couplings to the Higgs multiplets), it is necessary that the number of intersections image of the stacks a and b, and the number of intersections image of a with the orientifold image image of b satisfy image or image. It is also necessary that there is no matter in symmetric representations of the gauge group, and not too much matter in antisymmetric representations, on either stack. We provide a number of examples having these properties. Different lattices give different solutions and different physics.