  We propose a model for the antihyperon polarization in high-energy
proton-nucleus inclusive reactions, based on the final-state interactions
between the antihyperons and other produced particles (predominantly pions). To
formulate this idea, we use the previously obtained low-energy
pion-(anti-)hyperon interaction using effective chiral Lagrangians, and a
hydrodynamic parametrization of the background matter, which expands and
decouples at a certain freezeout temperature.
