Limits on the masses of supersymmetric particles from 1.8-TeV<i>pp¯</i>collisions

An analysis of pp\ifmmode\bar\else\textasciimacron\fi{} collision events at \ensuremath{\surd}s =1.8 TeV with jets and large missing transverse energy finds no event with missing transverse energy &gt;40 GeV. This result yields a 90%-C.L. limit on the cross section for one-jet-event production of &lt;0.1 nb for events with the jet in the pseudorapidity range \ensuremath{\Vert}\ensuremath{\eta}\ensuremath{\Vert}&lt;1.0 and with jet ${E}_{T}$&gt;52 GeV. Limits on the masses of squarks and gluinos in a minimal supersymmetry model are also set. At the 90% C.L., ${m}_{q\ifmmode \tilde{}\else \~{}\fi{}}$&gt;74 GeV and ${m}_{g\ifmmode \tilde{}\else \~{}\fi{}}$&gt;73 GeV.