Precision measurement of the neutron spin asymmetryA(n)(1) and spin-flavor decomposition in the valence quark region.

Journal article

We have measured the neutron spin asymmetry A(n)(1) with high precision at three kinematics in the deep inelastic region at x=0.33, 0.47, and 0.60, and Q(2)=2.7, 3.5, and 4.8 (GeV/c)(2), respectively. Our results unambiguously show, for the first time, that A(n)(1) crosses zero around x=0.47 and becomes significantly positive at x=0.60. Combined with the world proton data, polarized quark distributions were extracted. Our results, in general, agree with relativistic constituent quark models a...

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Authors: Zheng, X; Aniol, K; Armstrong, D; Averett, T; Bertozzi, W

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 92
• Issue: 1
• Pages: 012004
• Publication date: 2004-01-01
• DOI: 10.1103/physrevlett.92.012004
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English
• Keywords: Jefferson Lab Hall A Collaboration