Limits onξ(2.2) formation in p¯p→K+K−

We report the results of a search at the Brookhaven National Laboratory’s Alternating-Gradient Synchrotron for the ξ(2.2) observed by the Mark III group at the SLAC $e^{+}$ $e^{\mathrm{-}}$ storage ring SPEAR. 37 000 p¯p→$K^{+}$ $K^{\mathrm{-}}$ events and 200 000 p¯p→${\pi }^{+}$ ${\pi }^{\mathrm{-}}$ events were studied in the incident-momentum interval from 1.25 to 1.56 GeV/c, corresponding to a mass interval of 110 MeV/$c^2$ about the reported ξ mass. The mass resolution was 3 MeV/$c^2$. We find no evidence for ξ formation and determine that the product B(ξ→p¯p)B(ξ→$K^{+}$ $K^{\mathrm{-}}$) is <2×${10}^{\mathrm{-}4}$ for $J^{\mathrm{PC}}$ ${=2\mathrm{}}^{++}$ and Γ=35 MeV/$c^2$.