QCD scattering amplitudes: promenades along the three-loop frontier

by Fabrizio Caola (University of Oxford (GB))

Friday 3 Mar 2023, 14:00 → 16:00 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

In this talk, I will discuss recent results for three-loop QCD scattering amplitudes. After a gentle review of the techniques that enabled our calculations, I will illustrate their relevance both for phenomenological studies and for refining our understanding of perturbative QCD. Specifically, I will discuss how the three-loop gg->γγ amplitude allowed us to obtain improved theoretical predictions relevant for bounding the Higgs-boson total width through interferometry, and how the three-loop amplitudes for parton-partons scattering helped to shed some light on the structure of all-order QCD in the high-energy, or Regge, regime.

 

caola_CERN_3L.pdf