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

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

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