Flavor Asymmetry in Hyperons and Drell-Yan Processes

Abstract

SU(3), baryon octets and a meson cloud model are compared for the flavor asymmetry of sea quarks in the ${\Sigma }^{+}$, as an example. Large differences are found, especially between SU(3) and the meson cloud model. We suggest Drell-Yan measurements of ${\Sigma }^{+}-p$ and ${\Sigma }^{+}-d$ to test the prediction of various models. We use the meson cloud model to predict both valence and sea quark distributions.

Comments: 6 pages; 10 figures (can be obtained as ps. files); talk given at the Conference on Mesons, Baryons and Nuclei, Cracow