DETERMINATION OF FLAVOR ASYMMETRY FOR SIGMA(+ -) BY THE DRELL-YAN PROCESS/

Flavor asymmetries for the valence and sea quarks of the Sigma(+/-) ca n be obtained from Drell-Yan experiments using charged hyperon beams o n proton and deuteron targets. A large, measurable difference in sea q uark asymmetries is predicted between SU(3) and pseudoscalar meson mod els. The latter predict that in Sigma(+), (u) over bar/(d) over bar le ss than or equal to 1/2, whereas the former predict (u) over bar/(d) o ver bar approximate to 4/3. Estimates of valence quark asymmetries bas ed on quark models also show large deviations from SU(3) predictions, which should be measurable.