Publications
Publication Information
| Title | Isovector EMC effect from global QCD analysis with MARATHON data |
| Authors | Christopher Cocuzza, Cynthia Keppel, Hanjie Liu, Wolodymyr Melnitchouk, Andreas Metz, Nobuo Sato, Anthony Thomas |
| JLAB number | JLAB-THY-21-3352 |
| LANL number | arXiv:2104.06946 |
| Other number | DOE/OR/23177-5171 |
| 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 Letters Volume 127 Page(s) 242001 Refereed | |
| Publication Abstract: | We report the results of a Monte Carlo global QCD analysis of unpolarized parton distribution functions (PDFs), including for the first time constraints from ratios of $^3$He to $^3$H structure functions recently obtained by the \mar experiment at Jefferson Lab. Our simultaneous analysis of nucleon PDFs and nuclear effects in $A=2$ and $A=3$ nuclei reveals the first indication for an isovector nuclear EMC effect in light nuclei. We find that while the \mar data yield relatively weak constraints on the $F_2^n/F_2^p$ neutron to proton structure function ratio and the $d/u$ PDF ratio, they suggest a strongly enhanced nuclear effect on the $d$-quark PDF in the bound proton. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevLett.127.242001 |
| Accepted Manuscript: | PhysRevLett.127.242001.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |