Two-particle correlations involving neutral strange particles

Two-particle correlation functions $R(\ensuremath{\Delta}y)$ have been studied for ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, ${K}_{S}^{0}{K}_{S}^{0}$, ${K}_{S}^{0}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, $\ensuremath{\Lambda}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, and $\overline{\ensuremath{\Lambda}}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ pairs in ${\ensuremath{\pi}}^{\ensuremath{-}}p$ interactions at 250 GeV/c. Dynamical correlations are estimated by subtracting a Monte Carlo calculation containing only energy and momentum conservation correlations. ${K}_{S}^{0}{K}_{S}^{0}$ correlation is found to be considerably larger than ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ correlation, while ${K}_{S}^{0}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, $\ensuremath{\Lambda}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, and $\ensuremath{\Lambda}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ correlations are small.