The strange quark spin of the proton in semi-inclusive $\Lambda$ leptoproduction

Abstract

Considering the possible interpretation of the Ellis-Jaffe sum rule violation that the strange quark in the polarized proton is remarkably polarized in the opposite direction of the proton spin, we investigate its implication in the semi-inclusive $\Lambda$ production in deep inelastic process with the electron beam unpolarized and proton target polarized longitudinally. As a result, we find that the measurement of the $\Lambda$ polarization in the process considered can provide clean information about the strange quark spin distribution in the proton.

9 pages, revtex, no figures, to be published in Phys. Lett. B

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• New Sum Rules for Nucleon Tensor Charges
• The Quark-Antiquark Asymmetry of the Nucleon Sea from $\Lambda$ and $\bar{\Lambda }$ Fragmentation
• Quark to $\Lambda$-hyperon spin transfers in the current-fragmentation region
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