Generalized parton distributions through universal moment parameterization: non-zero skewness case

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13130_2023_Article_20901.pdf(2.31 MB)
Date
2023-05-18
Authors
Guo, Yuxun
Ji, Xiangdong
Santiago, M. G.
Shiells, Kyle
Yang, Jinghong
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Publisher
SpringerOpen
Abstract
Abstract We present the first global analysis of generalized parton distributions (GPDs) combing lattice quantum chromodynamics (QCD) calculations and experiment measurements including global parton distribution functions (PDFs), form factors (FFs) and deeply virtual Compton scattering (DVCS) measurements. Following the previous work where we parameterize GPDs in terms of their moments, we extend the framework to allow for the global analysis at non-zero skewness. Together with the constraints at zero skewness, we fit GPDs to global DVCS measurements from both the recent JLab and the earlier Hadron-Electron Ring Accelerator (HERA) experiments with two active quark flavors and leading order QCD evolution. With certain choices of empirical constraints, both sea and valence quark distributions are extracted with the combined inputs, and we present the quark distributions in the proton correspondingly. We also discuss how to extend the framework to accommodate more off-forward constraints beyond the small ξ expansion, especially the lattice calculated GPDs.
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Keywords
Parton Distributions, Properties of Hadrons, Specific QCD Phenomenology
Citation
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
Journal of High Energy Physics. 2023 May 18;2023(5):150
URI
https://doi.org/10.1007/JHEP05(2023)150
 http://hdl.handle.net/1993/37379
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University of Manitoba Scholarship