Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-08-03
Phys.Lett. B598 (2004) 211-217
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 LaTex pages, 4 figures, to appear in Phys. Lett. B
Scientific paper
10.1016/j.physletb.2004.07.049
The particle-antiparticle asymmetries of $\Lambda$ production in 250 GeV/c $\pi^{\pm}$, $K^{\pm}$, and $p$ --nucleon collisions are studied with two model parametrizations of quark to $\Lambda$ 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.
Ma Bo-Qiang
Schmidt Ivan
Yang Jian-Jun
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