Publications
Publication Information
| Title | Towards High-Precision Parton Distributions From Lattice QCD via Distillation |
| Authors | Colin Egerer, Robert Edwards, Christos Kallidonis, Konstantinos Orginos, Anatoly Radyushkin, David Richards, Eloy Romero Alcalde, Savvas Zafeiropoulos |
| JLAB number | JLAB-THY-21-3457 |
| LANL number | arXiv:2107.05199 |
| Other number | DOE/OR/23177-5274 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Journal of High Energy Physics Volume 11 Page(s) 148 Refereed | |
| Publication Abstract: | We apply the Distillation spatial smearing program to the extraction of the unpolarized isovector valence PDF of the nucleon. The improved volume sampling and control of excited-states afforded by distillation leads to a dramatically improved determination of the requisite Ioffe-time Pseudo-distribution (pITD). The impact of higher-twist effects is subsequently explored by extending the Wilson line length present in our non-local operators to one half the spatial extent of the lattice ensemble considered. The valence PDF is extracted by analyzing both the matched Ioffe-time Distribution (ITD), as well as a direct matching of the pITD to the PDF. Through development of a novel prescription to obtain the PDF from the pITD we establish a concerning deviation of the pITD from the expected DGLAP evolution of the pseudo-PDF. The presence of DGLAP evolution is observed once more following introduction of a discretization term into the PDF extractions. Observance and correction of this discrepancy further highlights the utility of distillation in such structure studies. |
| Experiment Numbers: | other |
| Group: | THEORY CENTER |
| Document: | |
| DOI: | https://doi.org/10.1007/JHEP11(2021)148 |
| Accepted Manuscript: | JHEP11-148_2021.pdf |
| Supporting Documents: | |
| Supporting Datasets: | |