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We summarize a search for the top quark with the Collider Detector atFermilab (CDF) in a sample of $\bar{p}p$ collisions at $\sqrt{s}$= 1.8 TeV withan integrated luminosity of 19.3~pb$^{-1}$. We find 12 events consistent witheither two $W$ bosons, or a $W$ boson and at least one $b$ jet. The probabilitythat the measured yield is consistent with the background is 0.26%. Though thestatistics are too limited to establish firmly the existence of the top quark,a natural interpretation of the excess is that it is due to $t\bar{t}$production. Under this assumption, constrained fits to individual events yielda top quark mass of $174 \pm 10^{+13}_{-12}$ GeV/c$^2$. The $t\bar{t}$production cross section is measured to be $13.9^{+6.1}_{-4.8}$~pb. (Submittedto Physical Review Letters on May 16, 1994).Comment: 15 pages (Latex), 2 PostScript figure

Evidence for top quark production inp¯pcollisions at √s=1.8 TeV