Publications
Publication Information
| Title | How well do we know the gluon polarization in the proton? |
| Authors | Y. Zhou, Nobuo Sato, Wolodymyr Melnitchouk |
| JLAB number | JLAB-THY-22-3462 |
| LANL number | arXiv:2201.02075 |
| Other number | DOE/OR/23177-5397 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | Yes |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Physical Review D Volume 105 Page(s) 074022 Refereed | |
| Publication Abstract: | We perform the first simultaneous global QCD analysis of spin-averaged and spin-dependent parton distribution functions (PDFs), including single jet production data from unpolarized and polarized hadron collisions. We critically assess the impact of SU(3) flavor symmetry and PDF positivity assumptions on the quark and gluon helicity PDFs, and find strong bias from these, particularly on the gluon polarization. The simultaneous analysis allows for the first time extraction of individual helicity aligned and antialigned PDFs with a consistent treatment of uncertainties. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.105.074022 |
| Accepted Manuscript: | PhysRevD.105.074022.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |