Leptoquark Pair Production at hadron colliders: Signal and Backgrounds

We perform a systematic analysis of scalar and vector leptoquark pair production at the Fermilab Tevatron and at the CERN LHC. We evaluate signal expectations and background levels for the processes pp(p{bar p}){r_arrow}2thinspjets+e{sup +}e{sup {minus}} and 2thinspjets+e+p/{sub T}. The Monte Carlo event generator ISAJET is used to simulate the experimental conditions at the current ({radical} (s) =1.8thinspTeV, L=100thinsppb{sup {minus}1}) and upgraded (L=2thinspfb{sup {minus}1}) Tevatron as well as the LHC ({radical} (s) =14thinspTeV, L=10thinspfb{sup {minus}1}). Depending on the luminosity, and assuming a branching ratio B(LQ{r_arrow}eq)=0.5, we find a discovery reach up to 170 (255) GeV for scalar leptoquarks at the current (upgraded) Tevatron. Similarly, we find vector leptoquarks to be detectable at masses below 300 (400) GeV depending on the coupling. At the LHC, the discovery reach is enhanced to 1 TeV for scalar leptoquarks and to 1.5 TeV for vectors. {copyright} {ital 1998} {ital The American Physical Society}