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

Abstract:

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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Publication status:
Published

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Journal:
Physical Review Letters
Volume:
92
Issue:
1
Pages:
012004
Publication date:
2004-01-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Source identifiers:
172777
Language:
English
Keywords:
Pubs id:
pubs:172777
UUID:
uuid:3694e511-e119-49b4-a6f4-8875c5b2f2a1
Local pid:
pubs:172777
Deposit date:
2012-12-19

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