First Global Extraction of Generalized Parton Distributions from Experiment and Lattice Data with Next-to-Leading-Order Accuracy
Year: 2025
Type: article
Abstract: We report the first global extraction of generalized parton distributions, GUMP 1.0, by combining deeply virtual Compton scattering and ρ-meson production data from Jefferson Lab and the Hadron-Electron Ring Accelerator with global fits of parton distribution functions, charge form factors, and lattice quantum chromodynamics simulations. Using a conformal moment space parametrization, we achieve a unified description across low- and high-x regions at next to leading order accuracy in perturbative corrections. The results provide state-of-the-art generalized parton distributions consistent with almost all known facts, enabling three-dimensional nucleon imaging in impact parameter space and, at the same time, establishing a benchmark for future theoretical and experimental studies of the nucleon structure.
Source: Physical Review Letters
DOI: 10.1103/qct5-y7rp
Authors: Yuxun Guo, Fatma P. Aslan, Xiangdong Ji, M. Gabriel Santiago
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Awards: G1286236842, G1728142190, G1848180026, G222768804, G2263355576, G2399599801, G2821925151, G2988778103, TOPICS IN THEORETICAL NUCLEAR PHYSICS, G3083819904, G419881185, G42916606, G4501827968, TOPICS IN THEORETICAL NUCLEAR PHYSICS, G498139845, G5027663112, G6427981414, G6674091005, G760235919, THEORETICAL STUDIES IN HADRONIC PHYSICS AND FUNDAMENTAL SYMMETRIES, 3D QUARK-GLUON STRUCTURE OF HADRONS: MASS, SPIN, AND TOMOGRAPHY, G969889393
OpenAlex ID: W4417200911