Publications
Publication Information
Title | Pion Valence Quark Distribution at Large x from Lattice QCD |
Authors | Raza Sufian, Colin Egerer, Joseph Karpie, Robert Edwards, Balint Joo, Yan-Qing Ma, Konstantinos Orginos, Jianwei Qiu, David Richards |
JLAB number | JLAB-THY-20-3131 |
LANL number | arXiv:2001.04960 |
Other number | DOE/OR/23177-4892 |
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 D Volume 102 Page(s) 054508 Refereed | |
Publication Abstract: | Using a short-distance collinear factorization, the pion valence quark distribution $q^\pi_{\rm v}(x)$ is extracted from spacelike correlations of antisymmetrized vector and axial vector (V-A) currents, where the employed perturbative hard coefficient is derived to one-loop. Finite lattice spacing, volume, and quark mass dependencies are investigated in a simultaneous fit of matrix elements computed on four gauge ensembles, providing a physical limit Ioffe time distribution. Using two different phenomenologically motivated parametrizations of $q^\pi_{\rm v}(x)$, the $q^\pi_{\rm v}(x)$ distribution is found to be in very good agreement with that extracted from experimental data. At large $x$, a softer valence quark distribution is slightly favored by the figure of merit of this calculation. These two distributions are consistent within uncertainty and reproduce the extraction of $q^\pi_{\rm v}(x)$ from the experimental data in the entire $x$-region, showing the robustness of our calculation. |
Experiment Numbers: | |
Group: | THEORY CENTER |
Document: | |
DOI: | https://doi.org/10.1103/PhysRevD.102.054508 |
Accepted Manuscript: | PhysRevD.102.054508.pdf |
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