Leptoquark search at e+e− colliders

We investigate the possibility of detecting a scalar leptoquark, coupling to the electron and the top, at a linear collider. For coupling strength equalling the weak coupling constant, the present mass bounds are of the order of 300 GeV. We demonstrate that at the NLC, one could detect such particles if their mass were upto a few TeVs. Similar constraints also obtain for the R-parity violating sector in the MSSM.