Search For Narrow States With Baryon Number Zero And Strangeness - 1 In Pbarp-]K-Slow+X- At 5 Gev/C

A search for narrow states with baryon number zero and strangeness -1 was conducted in $\stackrel{-}{p}p$ collisions. These hypothetical states could be composed of two quarks and two antiquarks and are similar to baryonium states. The experiment studied the missing mass recoiling against a slow ${K}^{+}$. No narrow resonances were observed, corresponding to cross-section upper limits of 4 \ensuremath{\mu}b for masses below 2.75 Gev/${\mathit{c}}^{2}$.