Particle-antiparticle asymmetries of Λ production in hadron-nucleon collisions

The particle-antiparticle asymmetries of Λ production in 250 GeV/c π±, K±, and p-nucleon collisions are studied with two model parametrizations of quark to Λ fragmentation functions. It is shown that the available data can be qualitatively explained by the calculated results in both the quark-diquark model and a pQCD based analysis of fragmentation functions. The differences in the two model predictions are significant for K+/- beams, and high precision measurements of the asymmetries with detailed xF and PT information can discriminate between different predictions