Observation of Top Quark Production in Pbar-P Collisions
The CDF Collaboration
Abstract
We establish the existence of the top quark using a 67 pb-1 data sample of Pbar-P collisions at Sqrt(s) = 1.8 TeV collected with the Collider Detector at Fermilab (CDF). Employing techniques similar to those we previously published, we observe a signal consistent with t-tbar decay to WW b-bbar, but inconsistent with the background prediction by 4.8 sigma. Additional evidence for the top quark is provided by a peak in the reconstructed mass distribution. We measure the top quark mass to be 176 +/-8(stat) +/- 10(sys.) GeV/c2, and the t-tbar production cross section to be 6.8 +3.6 -2.4 pb.
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