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

Aniol, K.; Averett, T.; Boeglin, W.; Camacho, C. Munoz; Camsonne, A.; Cates, G. D.; Chang, G.; Chen, J. -P.; Choi, Seonho; Chudakov, E.; Craver, B.; Cusanno, F.; Deur, A.; Dutta, D.; Ent, R.; Feuerbach, R.; Frullani, S.; Gao, H.; Garibaldi, F.; Gilman, R.; Glashausser, C.; Gorbenko, V.; Hansen, O.; Higinbotham, D. W.; Ibrahim, H.; Jiang, X.; Jones, M.; Kelleher, A.; Kelly, J.; Keppel, C.; Kim, W.; Korsch, W.; Kramer, K.; Kumbartzki, G.; LeRose, J. J.; Lindgren, R.; Liyanage, N.; Ma, B.; Margaziotis, D. J.; Markowitz, P.; McCormick, K.; Meziani, Z. -E.; Michaels, R.; Moffit, B.; Monaghan, P.; Paschke, K.; Reitz, B.; Saha, A.; Sheyor, R.; Singh, J.; Slifer, K.; Solvignon, P.; Sulkosky, V.; Tobias, A.; Urciuoli, G. M.; Wang, K.; Wijesooriya, K.; Wojtsekhowski, B.; Woo, S.; Yang, J. -C.; Zheng, X.; Zhu, L.

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

Abstract

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.Comment: 13 pages, 3 figure