Observation of rapidity gaps in p-barp collisions at 1.8 TeV.
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In pp collisions at s=1.8 TeV we find jet events with a rapidity gap topology. The number of hadrons in the rapidity interval D between leading-jet cones was sampled by charged tracks with PT>400 MeV/c. We find excess trackless events beyond that expected in a smooth multiplicity distribution. In a control region outside D we see no excess. For D>0.8, the fraction of excess trackless events, consistent with estimates based on exchange of color-singlet digluons, is R(gap)=jet(gap) jet=0.00850.0012(stat)-0.0012+0.0024(syst). 1995 The American Physical Society.