Moments of the neutron \(g_2\) structure function at intermediate \(Q^2\)

Moments of the neutron \(g_2\) structure function at intermediate \(Q^2\)

We present new experimental results of the \(^3\)He spin structure function \(g_2\) in the resonance region at \(Q^2\) values between 1.2 and 3.0 (GeV/c)\(^2\). Spin dependent moments of the neutron were then extracted. Our main result, the resonance contribution to the neutron \(d_2\) matrix elemen...

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Veröffentlicht in:arXiv.org 2015-06
Hauptverfasser: Solvignon, P, Liyanage, N, J -P Chen, Choi, Seonho, Slifer, K, Aniol, K, Averett, T, Boeglin, W, Camsonne, A, Cates, G D, Chang, C C, 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, B Ma, Margazioti, D J, Markowitz, P, McCormick, K, Z -E Meziani, Michaels, R, Moffit, B, Monaghan, P, C Munoz Camacho, Paschke, K, Reitz, B, Saha, A, Shneor, R, Singh, J, Sulkosky, V, Tobias, A, Urciuoli, G M, Wang, K, Wijesooriya, K, Wojtsekhowski, B, Woo, S, J -C Yang, Zheng, X, Zhu, L
Format: Artikel
Sprache:eng
Schlagworte:
Quantum chromodynamics
Spin structure
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Zusammenfassung:We present new experimental results of the \(^3\)He spin structure function \(g_2\) in the resonance region at \(Q^2\) values between 1.2 and 3.0 (GeV/c)\(^2\). Spin dependent moments of the neutron were then extracted. Our main result, the resonance contribution to the neutron \(d_2\) matrix element, was found to be small at \(\)=2.4 (GeV/c)\(^2\) and in agreement with the Lattice QCD calculation. The Burkhardt-Cottingham sum rule for \(^3\)He and the neutron was tested with the measured data and using the Wandzura-Wilczek relation for the low \(x\) unmeasured region. A small deviation was observed at \(Q^2\) values between 0.5 and 1.2 (GeV/c)\(^2\) for the neutron.
ISSN:2331-8422
DOI:10.48550/arxiv.1304.4497