Single vector leptoquark production in e(+)e(-) and gamma e colliders

We consider the single vector leptoquark (LQ) production at e(+)e(-) and gamma e colliders for two values of the center-of-mass energy root s = 500 GeV and root s = 1090 GeV, in a model-independent framework. We find that the cross sections for the single gauge and nongauge vector LQ productions are almost equal. The discovery limit for a single vector LQ production is obtained for both cases. It is shown that in e(+)e(-) collisions the single vector LQ production is more favorable than the vector LQ pair production, if the Yukawa coupling constant is kappa similar to 1.