Three photon production at the LHC: Amplitudes and Phenomenology

by Rene Poncelet (Cambridge University)

Wednesday 19 Feb 2020, 11:10 → 12:10 Europe/Zurich

Edificio U2, Aula 5017 (Dipartimento di Fisica G. Occhialini, U2, Università degli Studi di Milano-Bicocca)

Precise predictions for total and differential cross sections at hadron colliders
became an important corner stone of LHC physics. The lack of new
'smoking-gun' physics signals requires precise comparisons between
measurements and Standard Model predictions to get a handle on new
physics effects. For low multiplicity processes NNLO QCD (and possibly
combined with NLO-EW) has become the state-of-the-art. Multi-leg two-loop
amplitudes are the bottleneck for the computation of higher multiplicity
processes. I will discuss the calculation of 5 point amplitudes in a traditional
integration-by-parts approach and elaborate on the impact of NNLO QCD on
production of three photons at the LHC.

talk.pdf