Supersymmetry relations and MHV amplitudes in superstring theory Original Research Article

We discuss supersymmetric Ward identities relating various scattering amplitudes in type I open superstring theory. We show that at the disk level, the form of such relations remains exactly the same, to all orders in image, as in the low-energy effective field theory describing the image limit. This result holds in image for all compactifications, even for those that break supersymmetry. We apply SUSY relations to the computations of N-gluon MHV superstring amplitudes, simplifying the existing results for image and deriving a compact expression for image.