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Measurement of parton distributions of strange quarks in the nucleon from charged-kaon production in deep-inelastic scattering on the deuteron
- Source :
- PHYSICS LETTERS B, Airapetian, A, Blok, H P, Hesselink, W H A, van der Nat, P B & Wang, S 2008, ' Measurement of parton distributions of strange quarks in the nucleon from charged-kaon production in deep-inelastic scattering on the deuteron ', Physics Letters B, vol. 666, no. 5, pp. 446-450 . https://doi.org/10.1016/j.physletb.2008.07.090, Physics letters / B 666, 446 (2008). doi:10.1016/j.physletb.2008.07.090, Physics Letters B, 666(5), 446-450. Elsevier
- Publication Year :
- 2008
- Publisher :
- Elsevier BV, 2008.
-
Abstract
- 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.<br />5 pages, 5 figures, 1 table; text slightly expanded, 10 references added
- Subjects :
- Quark
Particle physics
Strange quark
Nuclear and High Energy Physics
Nuclear Theory
FOS: Physical sciences
Parton
01 natural sciences
NO
High Energy Physics - Experiment
Nuclear physics
High Energy Physics - Experiment (hep-ex)
13.60.-r
13.88.+e
14.20.Dh
14.65.-q
0103 physical sciences
ddc:530
SDG 14 - Life Below Water
010306 general physics
Nuclear Experiment
Physics
010308 nuclear & particles physics
Scattering
Deep inelastic scattering
Helicity
Strange matter
Physics and Astronomy
High Energy Physics::Experiment
Nucleon
Subjects
Details
- ISSN :
- 03702693
- Volume :
- 666
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Physics Letters B
- Accession number :
- edsair.doi.dedup.....5089424905fef9af4823df610feadcc5
- Full Text :
- https://doi.org/10.1016/j.physletb.2008.07.090