English

GUMP1.0 -- First global extraction of generalized parton distributions from experiment and lattice data with NLO accuracy

High Energy Physics - Phenomenology 2025-09-11 v1 High Energy Physics - Lattice Nuclear Experiment Nuclear Theory

Abstract

We report the first global extraction of generalized parton distributions (GPDs), GUMP1.0, by combining deeply virtual Compton scattering and ρ\rho-meson production data from Jefferson Lab and 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-xx regions at next to leading order (NLO) accuracy in perturbative corrections. The results provide state-of-the-art GPDs 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.

Keywords

Cite

@article{arxiv.2509.08037,
  title  = {GUMP1.0 -- First global extraction of generalized parton distributions from experiment and lattice data with NLO accuracy},
  author = {Yuxun Guo and Fatma P. Aslan and Xiangdong Ji and M. Gabriel Santiago},
  journal= {arXiv preprint arXiv:2509.08037},
  year   = {2025}
}

Comments

7 pages, 5 figures + 9-page supplemental