Moller bremsstrahlung
$e^-e^- \to e^-e^-\gamma$
Moller scattering with emission of a real photon. The simplest bremsstrahlung process for electron-electron scattering. The cross section for this process, integrated over soft photon energies, cancels the infrared divergence of the one-loop Moller amplitude.
This is the real-emission counterpart required by the KLN theorem: the IR divergence from virtual soft photons in one-loop Moller cancels against the IR divergence from this real soft photon emission process.
No diagrams cataloged for this process yet.