Is $M_t\simeq M_w$ Ruled Out?

Abstract

A four generation supersymmetric model is proposed, in which the Tevatron ``top-quark'' events are reinterpreted as the production of $t^{\prime }$ which decays dominantly to $b{W}^{+}$. In this model, $m_t\simeq m_W$, and $t\text{rta}\tilde{t}{\tilde{\chi }}_1^0$, with $\tilde{t}\text{rta}c{\tilde{\chi }}_1^0$. This decay chain, which rarely produces a hard isolated lepton, would have been missed in all previous top quark searches. A narrow region of the model parameter space exists which cannot yet be ruled out by present data. This model predicts a rich spectrum of new physics which can be probed at LEP-II and the Tevatron.

Comments: 8 pages, PHYZZX macropackage, postscript file of the full manuscript available via anonymous ftp at ftp://scipp.ucsc.edu/pub/haber/fourgen.ps