A twistor approach to one-loop amplitudes in image supersymmetric Yang–Mills theory Original Research Article

We extend the twistor string theory inspired formalism introduced in for calculating loop amplitudes in image super-Yang–Mills theory to the case of image (and image) super-Yang–Mills. Our approach yields a novel representation of the gauge theory amplitudes as dispersion integrals, which are surprisingly simple to evaluate. As an application we calculate one-loop maximally helicity violating (MHV) scattering amplitudes with an arbitrary number of external legs. The result we obtain agrees precisely with the expressions for the image MHV amplitudes derived previously by Bern, Dixon, Dunbar and Kosower using the cut-constructibility approach.