Publications
Publication Information
| Title | Bayesian Monte Carlo extraction of sea asymmetry with SeaQuest and STAR data |
| Authors | Christopher Cocuzza, Wolodymyr Melnitchouk, Andreas Metz, Nobuo Sato |
| JLAB number | JLAB-THY-21-3491 |
| LANL number | arXiv:2109.00677 |
| Other number | DOE/OR/23177-5308 |
| 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 D Volume 104 Page(s) 074031 Refereed | |
| Publication Abstract: | We perform a global QCD analysis of unpolarized parton distributions within a Bayesian Monte Carlo framework, including for the first time $W$-lepton production data from the STAR Collaboration at RHIC and Drell-Yan di-muon data from the SeaQuest experiment at Fermilab. We assess the impact of these two new measurements on the light antiquark sea in the proton, and the $\dbar-\ubar$ asymmetry in particular. The SeaQuest data are found to significantly reduce the uncertainty on the $\dbar/\ubar$ ratio at large parton momentum fractions $x$, strongly favoring an enhanced $\bar d$ sea up to $x \approx 0.4$, in general agreement with nonperturbative calculations based on chiral symmetry breaking in QCD. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevD.104.074031 |
| Accepted Manuscript: | PhysRevD.104.074031.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |