Measurement of the $\overline{p}p\to K_S{K}_S\hat{I}\cdot$ cross section at beam momenta in the regions of 1.45 and 1.7 GeV/c

Abstract

The PS185 experiment at LEAR/CERN has investigated strangeness production in antiproton-proton collisions with final states such as $\overline{\hat{I}}›\hat{I}›$, $\overline{\hat{I}}{\pounds }^0\hat{I}›+c.c$, $\overline{\hat{I}{\pounds }^{+}}\hat{I}{\pounds }^{+}$, $\overline{\hat{I}{\pounds }^{-}}\hat{I}{\pounds }^{-}$ and $K_S{K}_S$. Results are presented from a study of about 32,000 {$K_S{K}_{S}X$} events obtained at several antiproton momenta in the regions of 1.45 and 1.7 GeV/c. The $\overline{p}p\to K_S{K}_S\hat{I}\cdot$ cross sections extracted at these momenta constitute the first measurement of this reaction in flight and are broadly consistent with expectations of a phase-space extrapolation of branching ratios from annihilation at rest.

10 pages, 6 figures, LaTeX, less figures to save space, adapted text