Determination of flavor asymmetry for ${\Sigma }^{\pm }$ by the Drell-Yan process

Abstract

Flavor asymmetries for the valence and sea quarks of the ${\Sigma }^{\pm }$ can be obtained from Drell-Yan experiments using charged hyperon beams on proton and deuteron targets. A large, measurable difference in sea quark asymmetries is predicted between SU(3) and pseudoscalar meson models. The latter predict that in ${\Sigma }^{+}$, $\bar{u}/\bar{d}\le 1/2$, whereas the former predict $\bar{u}/\bar{d}\approx 4/3$. Estimates of valence quark asymmetries based on quark models also show large deviations from SU(3) predictions, which should be measurable.

15 pages, latex. Figures available from [email protected]. To be published in Phys. Lett. B

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• Lambda Polarization in Polarized Proton-Proton Collisions at RHIC
• Structure and Production of Lambda Baryons
• The Quark Distributions in the Σ^+ Hyperon
• Sea quark contents of octet baryons
• Flavor and Spin Structure of Octet Baryons at Large x
• The flavour asymmetry and quark-antiquark asymmetry in the ${\Sigma }^{+}$-sea
• The Quark Distributions of Baryons
• The spin structure function of the neutron
• Flavor symmetry breaking of the nucleon sea in the statistical approach