Higher Twists and Color Polarizabilities in the Neutron

Meziani, Z. -E.; Melnitchouk, W.; Chen, J. -P.; Choi, Seonho; Averett, T.; Cates, G.; de Jager, C. W.; Deur, A.; Gao, H.; Garibaldi, F.; Gilman, R.; Hughes, E. W.; Jiang, X.; Korsch, W.; Kramer, K.; Liyanage, N.; Slifer, K.; Yang, J. -C.

Higher Twists and Color Polarizabilities in the Neutron

Authors

Description

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 $Q^2 \alt 1$ 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 $Q^2 \sim 1$ GeV$^2$.
11 pages, 2 figures, minor changes following referees comments