Measurement of parton distributions of strange quarks in the nucleon from charged-kaon production in deep-inelastic scattering on the dueteron.
Journal Article
·
· Phys. Lett. B
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{sup {+-}} multiplicities, and from K{sup {+-}} 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 {bar u} and {bar d} quarks. In the region of measurement 0.02 < x < 0.6 and Q{sup 2} > 1.0 GeV{sup 2}, the helicity distribution is zero within experimental uncertainties.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC; DESY
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 978570
- Report Number(s):
- ANL/PHY/JA-61588
- Journal Information:
- Phys. Lett. B, Journal Name: Phys. Lett. B Journal Issue: 2008 Vol. 666
- Country of Publication:
- United States
- Language:
- ENGLISH
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