Z0+jets+pTevents as a signal for supersymmetry at the Fermilab Tevatron collider

We examine the processes $p\overline{p}\to \tilde{g}\tilde{g}$, $\tilde{q}\tilde{g}$, and $\tilde{q}\tilde{q}$ at Fermilab Tevatron collider energies and find an observable signal for $Z^0+\ge 2 \mathrm{jets}+\mathrm{missing} p_T$ events due to cascade and loop decays of squarks and gluinos. This signal occurs in a substantial region of the supersymmetric parameter space provided only that the Higgsino-mixing mass parameter is small. We evaluate several different standard-model backgrounds, and show that the signal (which can yield up to 25 events in the next Tevatron run) exceeds background for $m_{\tilde{q}}$ or $m_{\tilde{g}}$ as large as 200 GeV. Distributions which discriminate the supersymmetric signal from background are also shown.