Measurement of thett¯Production Cross Section inpp¯Collisions ats=1.8TeV

We present a measurement of the $t\overline{t}$ production cross section in $p\overline{p}$ collisions at $\sqrt{s}=1.8\mathrm{TeV}$ using an integrated luminosity of $109{\mathrm{pb}}^{-1\mathrm{}}$ collected with the Collider Detector at Fermilab. The measurement uses $t\overline{t}$ decays into final states which contain one or two high transverse momentum leptons and multiple jets, and final states which contain only jets. Using acceptances appropriate for a top quark mass of $175\mathrm{GeV}{/c}^2$, we find ${\sigma }_{t\overline{t}}{=7.6\mathrm{}}_{-1.5\mathrm{}}^{+1.8\mathrm{}}\mathrm{pb}$.