Polarization of Inclusive ${\Lambda }_c$'s in a Hybrid Model

Abstract

A hybrid model is presented for hyperon polarization that is based on perturbative QCD subprocesses and the recombination of polarized quarks with scalar diquarks. The updated hybrid model is applied to $p+p\to \Lambda +X$ and successfully reproduces the detailed kinematic dependence shown by the data. The hybrid model is extended to include pion beams and polarized ${\Lambda }_c$'s. The resulting polarization is found to be in fair agreement with recent experiments. Predictions for the polarization dependence on $x_F$ and $p_T$ is given.

Comments: Talk presented at Hyperon99. Latex2e and 4 PostScript figures. Style file hyperon99_paper.sty included