Higher twists and color polarizabilities in the neutron
/ Authors
Z. Meziani, W. Melnitchouk, J. Chen, Seonho Choi, T. Averett, G. Cates, C. Jager, A. Deur, Haiyan Gao, F. Garibaldi
and 8 more authors
R. Gilman, E. Hughes, X. Jiang, W. Korsch, K. Kramer, N. Liyanage, K. Slifer, J. C. Yang
/ Abstract
Abstract Color polarizabilities of the neutron are extracted from data on the lowest moment of the spin-dependent g 1 structure function. New data in the resonance region from Jefferson Lab at Q 2 ≲ 1 GeV 2 , in combination with world data at higher Q 2 , allow a systematic determination of the 1 / Q 2 corrections, and provide the first constraints on 1 / Q 4 corrections. The results suggest that higher-twist effects in the neutron are small, and that quark–hadron duality may be approximately valid, even down to Q 2 ∼ 1 GeV 2 .
Journal: Physics Letters B