Publications
Publication Information
| Title | Polarized Antimatter in the Proton from Global QCD Analysis |
| Authors | Christopher Cocuzza,Wolodymyr Melnitchouk,Andreas Metz,Nobuo Sato Gonzalez |
| JLAB number | JLAB-THY-22-3562 |
| LANL number | arXiv:2202.03372 |
| Other number | DOE/OR/23177-5423 |
| 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 Refereed | |
| Publication Abstract: | We present a global QCD analysis of spin-dependent parton distribution functions (PDFs) that includes the latest polarized $W$-lepton production data from the STAR collaboration at RHIC. These data allow the first data-driven extraction of a nonzero polarized light quark sea asymmetry $\Delta \bar{u} - \Delta \bar{d}$ within a global QCD framework with minimal theoretical assumptions. Within our simultaneous extraction of polarized PDFs, unpolarized PDFs, and pion and kaon fragmentation functions, we also extract a self-consistent set of antiquark polarization ratios $\Delta \bar{u}/\bar{u}$ and $\Delta \bar{d}/\bar{d}$. |
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| Group: | THEORY CENTER |
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