Publications
Publication Information
| Title | Confronting lattice parton distributions with global QCD analysis |
| Authors | Nobuo Sato, Wolodymyr Melnitchouk, Fernanda Steffens, Jianwei Qiu, Martha Constantinou, Jacob Bringewatt |
| JLAB number | JLAB-THY-21-3606 |
| LANL number | (None) |
| Other number | DOE/OR/23177-6155 |
| Document Type(s) | (Meeting) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Meeting Contributed Talk compiled for DIS2021 | |
| Publication Abstract: | We present the first Monte Carlo based global QCD analysis of spin-averaged and spin-dependent parton distribution functions (PDFs) that includes nucleon isovector matrix elements in coordinate space from lattice QCD. We investigate the degree of universality of the extracted PDFs when the lattice and experimental data are treated under the same conditions within the Bayesian likelihood analysis. For the unpolarized sector, we find rather weak constraints from the current lattice data on the phenomenological PDFs, and difficulties in describing the lattice matrix elements at large spatial distances. In contrast, for the polarized PDFs we find good agreement between experiment and lattice data, with the latter providing significant constraints on the spin-dependent isovector quark and antiquark distributions.
YouTube: https://youtu.be/FGEtvMqKAX0?t=6558 |
| Experiment Numbers: | |
| Group: | THEORY CENTER |
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