Single-spin asymmetries for small-angle pion production in high-energy hadron collisions

Within the framework of a simple model, we study single-spin asymmetries fo r pion production in hadron-hadron collisions at high energies with one had ron polarized. The asymmetries are generated via a mechanism of final- (ini tial-) state interactions. For peripheral kinematics, rye find nonzero asym metries at the high-energy limit when the pion belongs to the fragmentation region of the polarized proton. Numerical results and comparison with exis ting experimental data are presented. We also discuss the relationship with Odderon exchange phenomenology.