Two-loop leading-color helicity amplitudes for three-photon production at the LHC by Chawdhry, HA, Czakon, M, Mitov, A, Poncelet, R

NNLO QCD corrections to diphoton production with an additional jet at the LHC by Chawdhry, HA, Czakon, M, Mitov, A, Poncelet, R

Two-loop leading-colour QCD helicity amplitudes for two-photon plus jet production at the LHC by Chawdhry, HA, Czakon, M, Mitov, A, Poncelet, R