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Quark-Hadron Duality in Neutron (3He) Spin Structure

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arxiv 0803.3845 v2 pith:3OL2FC2K submitted 2008-03-27 nucl-ex

Quark-Hadron Duality in Neutron (3He) Spin Structure

P. Solvignon , N. Liyanage , J.-P. Chen , Seonho Choi , K. Aniol , T. Averett , W. Boeglin , A. Camsonne
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G. D. Cates G. Chang E. Chudakov B. Craver F. Cusanno A. Deur D. Dutta R. Ent R. Feuerbach S. Frullani H. Gao F. Garibaldi R. Gilman C. Glashausser V. Gorbenko O. Hansen D. W. Higinbotham H. Ibrahim X. Jiang M. Jones A. Kelleher J. Kelly C. Keppel W. Kim W. Korsch K. Kramer G. Kumbartzki J. J. LeRose R. Lindgren B. Ma D. J. Margaziotis P. Markowitz K. McCormick Z.-E. Meziani R. Michaels B. Moffit P. Monaghan C. Munoz Camacho K. Paschke B. Reitz A. Saha R. Sheyor J. Singh K. Slifer V. Sulkosky A. Tobias G. M. Urciuoli K. Wang K. Wijesooriya B. Wojtsekhowski S. Woo J.-C. Yang X. Zheng L. Zhu
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keywords dualityfunctionneutronquark-hadronspin-structureaboveasymmetrydependence
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present experimental results of the first high-precision test of quark-hadron duality in the spin-structure function g_1 of the neutron and $^3$He using a polarized 3He target in the four-momentum-transfer-squared range from 0.7 to 4.0 (GeV/c)^2. Global duality is observed for the spin-structure function g_1 down to at least Q^2 = 1.8 (GeV/c)^2 in both targets. We have also formed the photon-nucleon asymmetry A_1 in the resonance region for 3He and found no strong Q^2-dependence above 2.2 (GeV/c)^2.

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