Baryon exchange is studied in relation to the production of ${\Xi }^{-}$ and ${\Xi }^0$ hyperons in $K^{-}p$ interactions. Amplitudes for these reactions are derived from the exchanges of $\Lambda$, $\Sigma$, ${Y_1}^{*}\mathrm{}\left(1385\right)\mathrm{}$, and ${Y_0}^{*}\mathrm{}\left(1405\right)\mathrm{}$ baryons, with couplings determined from experimental data and ${\mathrm{SU}}_3$; absorptive corrections and vertex form factors are allowed as possible modifications of these amplitudes. The effects of interference between these exchanges simultaneously account for the observed partial-wave structure in ${\Xi }^{-}$ production and the suppression of ${\Xi }^0$ production relative to ${\Xi }^{-}$ production at intermediate energies; no enhancement of the ${Y_0}^{*}\mathrm{}\left(1405\right)\mathrm{}$ contribution, previously invoked to reconcile these two features, is necessary. The implications of the model for ${\Xi }^0$ production are discussed.

• Received 10 November 1966

DOI:https://doi.org/10.1103/PhysRev.158.1617