We numerically study the effects of gauge smearing on the nucleon and meson gluon-PDF matrix elements, considering hypercubic smearing, stout smearing, and Wilson flow.
The lattice calculations are carried out with $N_\text{f} = 2 + 1 + 1$ highly improved staggered quarks in ensembles generated by the MILC Collaboration.
We use clover fermions for the valence action on one lattice spacing $a \approx 0.12$ fm and two pion masses $M_\pi \approx 310$ and $690$~MeV.
We probe the effects of gluon matrix elements with different smearing methods at various steps. We compute and compare the resulting nucleon and meson gluon PDFs using the pseudo-PDF method when using different smearing methods.
Volume 453 -
The 40th International Symposium on Lattice Field Theory (LATTICE2023) -
Structure of Hadrons and Nuclei
How Gluon Pseudo-PDF Matrix Elements Depend on Gauge Smearing
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December 27, 2023
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Abstract
DOI: https://doi.org/10.22323/1.453.0330
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.