Particle-Antiparticle Asymmetries of $\hat{I}›$ Production in Hadron-Nucleon Collisions

Abstract

The particle-antiparticle asymmetries of $\hat{I}›$ production in 250 GeV/c $\ddot{I}{€}^{\pm }$, $K^{\pm }$, and $p$ --nucleon collisions are studied with two model parametrizations of quark to $\hat{I}›$ 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 $K^{\pm }$ beams, and high precision measurements of the asymmetries with detailed $x_F$ and $P_T$ information can discriminate between different predictions.

14 LaTex pages, 4 figures, to appear in Phys. Lett. B