Asymmetry in charmed-particle production in a Σ − beam

We present a calculation of the inclusive xF distributions of charmed hadrons produced in a high-energy Σ− beam. The calculation is based on the modified mechanism of charmed-quark fragmentation, as well as on the mechanism of c-quark recombination with the valence quarks from initial hadrons. We predict additional asymmetry in the production of charmed hadrons due to different distributions of the valence s and d quarks in a Σ− beam.