Speaker
Description
We compute the two-loop helicity amplitudes for the scattering of five partons, including all contributions beyond the leading-color approximation. The analytic expressions are represented as linear combinations of transcendental functions with rational coefficients, which we reconstruct from finite-field samples obtained with the numerical unitarity method. Guided by the requirement of removing unphysical singularities, we find a remarkably compact generating set of rational coefficients, which we are able to display entirely on a few pages. Such results call for further investigations in analytic properties of multi-loop multi-scale scattering amplitudes with the goal to simplify computations and to optimise final results for phenomenological applications.
