SINGLE VECTOR LEPTOQUARK PRODUCTION IN E(-) AND GAMMA-E COLLIDERS()E()

We consider the single vector leptoquark (LQ) production at e(+)e(-) a nd 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. W e find that the cross sections for the single gauge and nongauge vecto r LQ productions are almost equal. The discovery limit for a single ve ctor LQ production is obtained for both cases. It is shown that in e()e(-) collisions the single vector LQ production is more favorable tha n the vector LQ pair production, if the Yukawa coupling constant is ka ppa similar to 1.