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, 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
TL;DR
This study provides high-precision experimental evidence that quark-hadron duality holds for the neutron's spin-structure function g_1 in a broad Q^2 range, using polarized helium-3 targets.
Contribution
First high-precision test of quark-hadron duality in neutron spin structure function g_1 with polarized 3He over a wide Q^2 range.
Findings
Global duality observed for g_1 down to Q^2 = 1.8 GeV^2
Photon-nucleon asymmetry A_1 shows no strong Q^2 dependence above 2.2 GeV^2
Results support quark-hadron duality in neutron 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 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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