Speaker
Alexander Ochirov
(University of Edinburgh)
Description
I will present a general method to account for full colour dependence Yang-Mills amplitudes at loop level. The method fits most naturally into the framework of multi-loop integrand reduction and in a nutshell amounts to consistently retaining the colour structures of the unitarity cuts from which the integrand is gradually constructed. I will discuss connections to loop-level Kleiss-Kuijf relations and implications for cancellation of nontrivial symmetry factors at two loops. I will illustrate this technique on the recent calculation of the two-loop five-gluon amplitude with all positive-helicity gluons, as well as a three-loop example in supersymmetric Yang-Mills.
Primary authors
Alexander Ochirov
(University of Edinburgh)
Dr
Ben Page
(University of Freiburg)
