We have measured the production of strange baryons and antibaryons in 340-GeV/c ${\Sigma }^{-}+\mathrm{C}$ and 260-GeV/c $n+\mathrm{C}$ interactions. The single $x_F$ distributions show the expected leading particle effect, and the single $p_t^2$ distributions show a distinct nonthermal behavior. The $x_F$ distributions of Λ-Λ pairs indicate two different phase space distributions for the two coincident baryons. On the other hand two $\overline{\Lambda }\mathrm{’}\mathrm{s}$ show identical distributions. Momentum conservation during the formation process may represent a significant source for the observed behavior.

• Received 21 September 2001

DOI:https://doi.org/10.1103/PhysRevC.65.042202