Hyperon Polarization from Unpolarized pp and ep Collisions

Cross section formulas for the $\mathrm{\Lambda }$ polarization in $pp\to {\mathrm{\Lambda }}^{\uparrow }({\mathrm{\ell }}_T)X$ and $ep\to {\mathrm{\Lambda }}^{\uparrow }({\mathrm{\ell }}_T)X$ are derived and its characteristic features are discussed.