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Updated: Sep 11, 2025

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带电哈德龙的碎片化函数在下一个到下一个到领先的顺序和对质子分离函数的限制
Jun Gao1, XiaoMin Shen1,2, Hongxi Xing3,4,5
1Shanghai Jiao Tong University, State Key Laboratory of Dark Matter Physics, Shanghai Key Laboratory for Particle Physics and Cosmology, Key Laboratory for Particle Astrophysics and Cosmology (MOE), School of Physics and Astronomy, Shanghai 200240, China.
Physical review letters
|August 12, 2025
概括
这项研究提供了第一个对光带电的子 (pions,kaons) 碎片化函数的全球分析,在量子染色力学中排名次于次于领先的顺序. 结果影响了部分分布函数,表明奇怪夸克分布中的不对称性减少.
科学领域:
- 高能物理学的高能物理学
- 量子色态动力学 是一个量子色态动力学.
- 哈德龙物理学 哈德龙物理学
背景情况:
- 分碎函数描述了高能碰撞中的哈德龙化.
- 之前的分析缺乏全球数据在更高的扰乱顺序.
- 分子分布函数 (PDF) 对于理解核子结构至关重要.
研究的目的:
- 在量子染色动力学中,进行对具有光电荷的哈德龙 (pions,kaons) 在完整的下一个到下一个到领先的顺序 (NNLO) 的碎片化函数的第一个全球分析.
- 调查这项新分析对Parton分布函数 (PDF) 的影响.
- 用实验数据测试对线式因子分解.
主要方法:
- 全球对碎片化函数的分析,使用来自电子-正子灭绝和深不弹性散射实验的世界数据.
- 在量子染色动力学中,以完整的下一个到下一个到领先的顺序 (NNLO) 进行计算.
- 研究子生产数据对奇怪夸克PDF文件的影响.
主要成果:
- 介绍了第一个对π^{±}和K^{±}的全局NNLO碎片化函数.
- 对于低和高动量转移模式,对线性因子化得到了验证.
- 与基于包容性数据的PDF的预测相比,对子生产的全球数据有利于减少奇怪夸克PDF中的不对称性.
结论:
- 在NNLO的碎片化函数提供一个更精确的描述的hadronization.
- 这项研究完善了我们对核子内部结构的理解,特别是奇怪的夸克海.
- 这项工作为未来的高能物理学精度研究提供了关键的投入.
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