Speaker
Colomba Brancaccio
Description
I discuss the status of the computation of two-loop QCD corrections to top quark pair
production in association with a jet at hadron colliders, which represents a bottleneck
in achieving more precise predictions for this process. I briefly introduce cutting-edge
computational techniques that tackle the extreme algebraic and analytic complexities
of two-loop multi-scale helicity amplitudes involving elliptic functions. I present first
evaluations of the helicity amplitudes for the process gg→tt̄j . Notably, ultraviolet
(UV) and infrared (IR) poles are analytically identified and the finite remainder directly
extracted through the introduction of a basis of special functions.
