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Updated: Sep 13, 2025

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格子-QCD可计算的三环顺序上的夸克相关函数和分割函数的提取
Chen Cheng1, Li-Hong Huang1, Xiang Li1
1Peking University, School of Physics, Beijing 100871, China.
Physical review letters
|July 31, 2025
概括
我们以迄今为止最高的精度计算了Parton分布函数的匹配系数. 这减少了理论上的不确定性,并使分割函数的精确提取成为可能,从而推进了理论物理计算.
科学领域:
- 高能物理 高能物理
- 量子色态动力学 量子色态动力学
- 计算物理 计算物理
背景情况:
- 分子分布函数 (PDF) 描述了子内部的粒子动量.
- 格子量子染色力学 (QCD) 为QCD提供了一种非扰动的方法.
- 匹配系数对于将理论计算与实验可观测值联系起来至关重要.
研究的目的:
- 执行匹配系数的第一个完整的下一个到下一个到下一个到最重要的顺序 (N3LO) 计算.
- 为了减少理论上的不确定性在分析的非极化风味非单体PDFs.
- 为了提取三环非极化风味非片分裂功能.
主要方法:
- 在N3LO.中计算匹配系数的计算.
- 使用格子QCD可计算的相关函数.
- 从计算的系数中提取分割函数.
主要成果:
- 第一个完整的N3LO对非极化风味非单片子匹配系数的计算. PDFs.
- 与低级计算相比,理论不确定性的显著减少.
- 提取三环分割函数,与现有的最先进的结果相一致.
结论:
- N3LO计算提供了一个更精确的PDF和格子QCD之间的联系.
- 开发的方法简化了分割函数的提取.
- 这项工作为未来分割函数的四循环顺序计算铺平了道路.
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