Detecting a light stop from top decays at the Tevatron

We study the possibility of discovering or excluding a light top squark (stop) t̃1 based on top quark decays in the tt events produced at the Fermilab Tevatron. In particular, we consider the Minimal Supersymmetric Standard Model with the sparticle spectrum mχ1± + mb, Mw + mχ10 + mb > mt̃1 > mχ10 + mc, where χ10 is the lightest neutralino, so that t → t̃1χ10 and t̃1 → cχ10. All other sparticle masses are assumed to be heavier than mt. Such a spectrum seeks to explain the experimental values of αs(Mz2), Rb and Alr obtained from LEP/SLC data. We find that the prospect to observe a light stop via channel at the Tevatron is very promising.