arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2509.08037hep-phhep-latnucl-exnucl-th
收藏

GUMP1.0——首次从实验和格点数据中全局提取广义部分子分布,达到NLO精度

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

Yuxun Guo, Fatma P. Aslan, Xiangdong Ji, M. Gabriel Santiago

AI总结:

本文首次结合实验与格点数据全局提取GPDs(GUMP1.0),在NLO精度下统一描述低高x区域,实现三维核子成像并建立基准。

摘要:

我们报告了首次全局提取广义部分子分布(GPDs)的结果,即GUMP1.0,该结果结合了来自杰斐逊实验室和强子-电子环形加速器的深度虚康普顿散射和ρ介子产生数据,以及部分子分布函数的全局拟合、电荷形状因子和格点量子色动力学模拟。利用共形矩空间参数化,我们在微扰修正的次领头阶(NLO)精度下实现了对低x和高x区域的统一描述。这些结果提供了与几乎所有已知事实一致的最先进的GPDs,使得在冲击参数空间中进行三维核子成像成为可能,同时为未来核子结构的理论和实验研究建立了基准。

英文摘要:

We report the first global extraction of generalized parton distributions (GPDs), GUMP1.0, by combining deeply virtual Compton scattering and $ρ$-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-$x$ 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑