Asymmetries In The Production Of Lambda Superscript 0 Xi Superscript Minus And Omega Superscript Minus Hyperons In 500 Gev C Pi Superscript Minus Nucleon Interactions
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Hyperon Production Asymmetries in 500 GeV/c Pion Nucleus Interactions
We present a preliminary study from Fermilab experiment E791 of[Lambda][sup 0]/[anti[Lambda]][sup 0], [Xi][sup -]/[Xi][sup+] and[Omega][sup -]/[Omega][sup+] production asymmetries from[pi][sup -] nucleus interactions at 500 Gev/c. The production asymmetries for these particles are studied as a function of x[sub F] and p[sup 2][sub T]. We observed an asymmetry in the target fragmentation region for[Lambda][sup 0]'s larger than that for[Xi]'s, suggesting diquark effects. The asymmetry for[Omega]'s is significatively smaller than for the other two hyperons consistent with the fact that[Omega]'s do not share valence quarks with either the pion or the target particle. In the beam fragmentation region, the asymmetry tends to 0.1 for both[Lambda][sup 0]'s and[Xi]'s. The asymmetries vs p[sup 2][sub T] are approximately constant for the three strange baryons under study.