Spin-Dependent Twist-Four Matrix Elements from g_1 Data in the Resonance Region
High Energy Physics - Phenomenology
2010-01-06 v1 High Energy Physics - Experiment
Nuclear Theory
Abstract
Matrix elements of spin-dependent twist-four operators are extracted from recent data on the spin-dependent g_1 structure function of the proton and deuteron in the resonance region. We emphasize the need to include the elastic contributions to the first moments of the structure functions at Q^2 < 2 GeV^2. The coefficients of the 1/Q^2 corrections to the Ellis-Jaffe sum rules are found to be 0.04 \pm 0.02 and 0.03 \pm 0.04 GeV^2 for the proton and neutron, respectively.
Keywords
Cite
@article{arxiv.hep-ph/9703363,
title = {Spin-Dependent Twist-Four Matrix Elements from g_1 Data in the Resonance Region},
author = {Xiangdong Ji and W. Melnitchouk},
journal= {arXiv preprint arXiv:hep-ph/9703363},
year = {2010}
}
Comments
10 pages REVTeX, 4 figures