Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-05-31
Phys.Rev.D54:6581-6585,1996
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revised manuscript corrects minor errors and typos. Revised figure with proper labels. 12 pages, revtex, one ps figure, BoxedE
Scientific paper
10.1103/PhysRevD.54.R6581
Data on the nucleon spin structure suggests that the $u$ (and $d$) quark distributions in the $\Lambda$ hyperon may be polarized. If this correlation carries over into fragmentation, then the study of polarized $\Lambda$'s in the current fragmentation region of deep inelastic lepton scattering will be a sensitive probe of nucleon spin structure. $\Lambda$ production by polarized electrons from unpolarized targets can search for this correlation. If it is signficant, $\Lambda$ production by unpolarized electrons from longitudinally and transversely polarized targets can probe the $u$-quark helicity and transversity distributions in the nucleon. We review what is known about quark polarization in the $\Lambda$, summarize electroproduction of polarized $\Lambda$s, and estimate the sensitivity to quark polarizations in the nucleon. We also describe polarization phenomena associated with vector meson electroproduction that can be observed in the same experimental regime.
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