Publications
Publication Information
| Title | Resonant contributions to polarized proton structure functions |
| Authors | A. Hiller Blin, Victor Mokeev, W. Melnitchouk |
| JLAB number | JLAB-THY-23-3739 |
| LANL number | arXiv:2212.11952 |
| Other number | DOE/OR/23177-5674 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Physical Review C Volume 107 Page(s) 035202 Refereed | |
| Publication Abstract: | Nucleon resonance contributions to the polarized proton $g_1$ and $g_2$ structure functions are computed from resonance electroexcitation amplitudes extracted from CLAS exclusive meson electroproduction data. Including resonances in the mass range up to 1.75~GeV, and taking into account the interference between excited states, we compare the resonant contributions with the polarized proton structure function and polarization asymmetry data from Jefferson Lab 6~GeV measurements. All resonance-like structure observed in the polarized structure functions and asymmetries can be attributed to the resonant contributions, suggesting their essential role in the behavior of $g_1$ and $g_2$ at large parton momentum fraction $x$ in the resonant region over the entire range $Q^2 < 7.5$~GeV$^2$ covered by the measurements. Comparing the resonance contributions with the $g_1$ and $g_1$ structure functions computed from parton distribution functions extrapolated from the deep-inelastic region, we also quantify the degree to which quark-hadron duality holds for $g_1$ and $g_2$ and their moments. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevC.107.035202 |
| Accepted Manuscript: | PhysRevC.107.035202.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |