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hep-ph2025
Two-loop QCD corrections for real and off-shell diphoton and triphoton production via quark loops
Dario Kermanschah, Matilde Vicini
We compute squared matrix elements at next-to-next-to-leading order in perturbative quantum chromodynamics for the production of two or three (on- or off-shell) photons mediated vi…
hep-ph2025
General finite two-loop amplitude integrand for photoproduction in quark annihilation
Charalampos Anastasiou, Julia Karlen, Roshni Sahoo +2
The construction of integrands free of infrared and ultraviolet singularities may enable the application of numerical methods to evaluate loop amplitudes that are inaccessible with…