Speaker
Matteo Tresoldi
Description
Beyond leading order in QCD, infrared singularities arise in real and virtual corrections and must cancel in physical observables. At NNLO, organising this cancellation becomes considerably more involved due to the presence of a myriad of unresolved limits. I will discuss how these can be systematically treated within the nested soft-collinear subtraction scheme for arbitrary processes with massless partons. This leads to a fully local, analytic and process-independent subtraction framework, in which the NNLO cross section is written in terms of explicitly finite contributions, completing the generalization of the scheme to arbitrary massless QCD processes at NNLO.