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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
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
JLAB Number: JLAB-THY-22-3751 OSTI Number: 1962984
LANL Number: arXiv:2211.04434 Other Number: DOE/OR/23177-5644
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)
JHEP03(2023)086.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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