Resonant bound state production at e(-)e(-) colliders

Observation of a sequence of resonances at an e(-)e(-) collider would sugge st bound states of strongly coupled constituents carrying lepton number. Ob vious candidates for these exotic constituents are leptoquarks and leptoglu ons. We show that under reasonable assumptions, the existence of one leptog luon flavor of appropriate mass can give rise to sizable "leptoglueball" pr oduction rates and observable resonance peaks. In contrast, one needs two l eptoquark flavors in order to produce the analogous "leptoquarkonium" state s. Moreover, cross-generational leptoquark couplings are necessary to give observable event rates in many cases, and leptoquarkonium mass splittings a re too small to resolve with realistic beam energy resolutions. (C) 1998 El sevier Science B.V. All rights reserved.