Scattering amplitudes at the high-multiplicity frontier
Date: 22 NOVEMBER 2022 from 14:30 to 15:30
I discuss the recent advances in the computation of two-loop scattering amplitudes for five-particle processes with an external massive particle. The latter are fundamental ingredients to obtain predictions at the next-to-next-to-leading order (NNLO) in QCD for many interesting LHC processes. I give an overview of the modern workflow for computing scattering amplitudes analytically, and present cutting-edge mathematical techniques to overcome the main bottlenecks: a systematic strategy to construct a basis of transcendental functions which allows us to evaluate the required Feynman integrals efficiently, and finite field methods to tame the algebraic complexity of the expressions. Finally, I showcase the recent applications of these techniques to a number of processes of interest for the LHC physics programme, and present the first phenomenological study at NNLO QCD for a process of this class.