  We discuss interplay of the scalar and vector diquarks which decide the
characteristics of the spin polarization as functions of $p_T$ and $x_F$ in the
wide kinematical range. We demonstrate a significant effect of quark masses on
the pair-creation probabilities from vacuum in $pp \to \Sigma^- X$ and $\gamma
p \to \Lambda X$ collisions, and also a remarkable correction induced by the
diquark form factor in $ \Sigma^- p \to \Lambda X $ collision.
