This process computes the contribution of light-quark loops to the process gg → γγ. It is calculable at leading LO and next-to-leading order NLO. The calculation and a phenomenological analysis are described in Ref. [1]. This process includes the one-loop gluon-gluon contribution as given in ref. [2].

This process computes the contribution of light-quark loops to the process gg → γγ. It is calculable at leading LO and next-to-leading order NLO. The calculation and a phenomenological analysis are described in Ref. [1]. This process includes the one-loop gluon-gluon contribution as given in ref. [2].

nplotter_gamgam.f is the default plotting routine.

[1] J.M. Campbell, R.K. Ellis, Y. Li and C. Williams, Predictions for diphoton production at the LHC through NNLO in QCD, JHEP 07 (2016) 148 [1603.02663].

[2] Z. Bern, L.J. Dixon and C. Schmidt, Isolating a light Higgs boson from the diphoton background at the CERN LHC, Phys. Rev. D66 (2002) 074018 [hep-ph/0206194].