Orbifolding the twistor string Original Research Article

The D-instanton expansion of the topological B-model on the supermanifold image reproduces the perturbative expansion of image super-Yang–Mills theory. In this paper we consider orbifolds in the fermionic directions of image. This operation breaks the image R-symmetry group, reducing the amount of supersymmetry of the gauge theory. As specific examples we take image and image orbifolds and obtain the corresponding superconformal quiver theories. We discuss the D1 instanton expansion in this context and explicitly compute some amplitudes.