[HET seminar] QCD scattering amplitudes: strolling around the three-loop frontier

by Prof. Fabrizio Caola (Oxford)

Friday 7 Jul 2023, 12:30 → 14:00 US/Eastern

Small Seminar Room, Bldg. 510 (https://bnl.zoomgov.com/j/1605999124?pwd=eCs3M0t2eGtiL0dyMGNoUDIzamxqQT09)

In this talk, I will discuss recent results for three-loop QCD scattering amplitudes. After a quick and 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 gauge theories. 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.