Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2008-03-20
Phys.Lett.B666:446-450,2008
Physics
High Energy Physics
High Energy Physics - Experiment
5 pages, 5 figures, 1 table; text slightly expanded, 10 references added
Scientific paper
10.1016/j.physletb.2008.07.090
The momentum and helicity density distributions of the strange quark sea in the nucleon are obtained in leading order from charged-kaon production in deep-inelastic scattering on the deuteron. The distributions are extracted from spin-averaged K+/- multiplicities, and from K+/- and inclusive double-spin asymmetries for scattering of polarized positrons by a polarized deuterium target. The shape of the momentum distribution is softer than that of the average of the ubar and dbar quarks. In the region of measurement 0.02 < x < 0.6 and Q^2 > 1.0 GeV^2, the helicity distribution is zero within experimental uncertainties.
Airapetian A.
HERMES Collaboration
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