STI Publications - View Publication Form #17203
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Publication Information
| Title | Non-singlet quark helicity PDFs of the nucleon from pseudo-distributions | ||||
| Abstract | The non-singlet helicity quark parton distribution functions (PDFs) of the nucleon are determined from lattice QCD, by jointly leveraging pseudo-distributions and the distillation spatial smearing paradigm. A Lorentz decomposition of appropriately isolated space-like matrix elements reveals pseudo-distributions that contain information on the leading-twist helicity PDFs, as well as an invariant amplitude that induces an additional $z^2$ contamination of the leading-twist signal. Novel to this calculation is the establishment of a prescription for rigorously removing this contamination from the leading-twist signal. An analysis of the short-distance behavior of the leading pseudo-distribution using matching coefficients computed to next-to-leading order (NLO) exposes the desired PDF. Due to the non-conservation of the axial current, we elect to isolate the helicity PDFs normalized by the nucleon axial charge at the same scale $\mu^2$. In particular, the leading-twist helicity PDFs as we | ||||
| Author(s) | Robert Edwards, Colin Egerer, Joseph Karpie, Nikhil Nikhil Sridharan Karthik, Christopher Monahan  , Wayne Morris, Konstantinos Orginos, Anatoly Radyushkin, David Richards, Eloy Romero Alcalde, Raza Sufian , Savvas Zafeiropoulos |
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| Publication Date | March 2023 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Journal of High Energy Physics |
| Refereed | Yes |
| Volume | |
| Issue | |
| Page(s) | 86 |
Attachments/Datasets/DOI Link
| Document(s) |
Helicity_PDF_from_Pseudo_Dists.pdf
(STI Document)
JHEP03(2023)086.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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