PJC: Federico Ripani "Full top-quark mass dependence in diphoton production at NNLO in QCD"

Thursday 9 Nov 2023, 13:00 → 14:00 Europe/Rome

Sala Direzione INFN (Marconi)

I will present the Next-to-next-to-leading order QCD massive corrections, induced by the top quark, to di-photon production in proton-proton collisions. This process is very important as a test of perturbative QCD and as a background process for the decay of a Higgs into two photons. All the
involved partonic subprocesses are taken into account; in particular the quark-antiquark annihilation channel, which has required the computation of new two-loop Master Integrals, evaluated using the differential equations method, in the semi-analitical approach based on generalised power series
expansion. I will then present a phenomenological study of the impact of these corrections for the invariant mass distribution of the two photons.

 

Based on https://arxiv.org/abs/2308.10885

and https://arxiv.org/abs/2308.11412