Diquark production in ep collisions

We examine the production of single diquarks (D) and diquark pairs (Danti D) in ep collisions using the effective photon approximation. Cross-sections for both mechanisms are found to be quite sensitive to the assumed charges of the diquark but can lead to significant production rates in all cases at HERA and future ep colliders. Backgrounds from QCD jet production are found to be potentially significant in the case of single D production where the signal to background is approximately one-to-one whereas the production of Danti D pairs is relatively background free. (orig.)