Search For Narrow Pbarp States Produced By Meson Exchange

The results are reported of a search for narrow $\overline{p}p$ states in the mass range 1.9 to 2.5 ${\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c}}^{2}$ produced in the meson-exchange reaction ${\ensuremath{\pi}}^{+}p\ensuremath{\rightarrow}{(\overline{p}p)}_{f}{\ensuremath{\Delta}}^{++}$ at 9.8 GeV/c. This measurement is sensitive to production of the controversial $S(1935)$ meson. It is also sensitive to multiquark exchange leading to the production of four-quark states. We find no evidence for narrow states at the \ensuremath{\sim}20-nb level.