Unconfined heavy-fermion model of the upsilons

It is considered the possibility that the upsilon peaks are bound states of F and anti F, where F is a heavy spin-1/2 particle with integral charge. The presently known spectroscopy of the upsilons, neglecting spin effects, can readily be reproduced by a simple potential (which, of course, allows also for the existence of unconfined continuum states of F anti F as well). Predictions are made concerning hadronic production of upsilons, widths of the upsilon system, and other experimental signatures which might differentiate the model from the conventional b-quark picture. (author)