Speaker
Valentin Jonathan Hirschi
(University of Bern)
Description
I will briefly present a recent application of Local Unitarity to the calculation of the NNLO QCD correction to $\gamma \gamma \rightarrow Q \bar{Q}$.
Local Unitarity is a computational technique achieving the local cancellation of infrared singularities at the integrand level, unlocking the computation of perturbative cross-section fully numerically in momentum space.
This will set me up for giving a more general overview of the challenges that such numerical methods face, especially regarding the various types of singularities requiring regularisation, and what solutions are currently being considered.