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arXiv 2305.06992hep-phhep-latnucl-ex
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用于探测质子胶子引力形状因子的近阈值重夸克偶素产生的最新分析

Updated analysis of near-threshold heavy quarkonium production for probe of proton's gluonic gravitational form factors

Yuxun Guo, Xiangdong Ji, Yizhuang Liu, Jinghong Yang

AI总结:

本文修正并重分析近阈值重夸克偶素产生过程,结合新实验与胶子GFF格点结果,探讨利用大动量转移可靠提取质子胶子引力结构。

摘要:

人们对重夸克偶素的近阈值产生越来越感兴趣,因为该过程能够触及核子中的胶子结构。此前,我们利用量子色动力学(QCD)研究了这一过程,并表明在重夸克极限下,它可以通过胶子广义部分子分布(GPDs)进行因子化。我们进一步论证,在该极限下,强子矩阵元由对应于胶子引力形状因子(GFFs)的领头矩主导。自那时以来,这一课题出现了许多新进展:更多实验测量已经完成并发表,胶子GFFs的格点模拟也得到了改进。在本工作中,我们对先前的一项结果作出重要修正,并利用新的输入进行最新分析。我们还研究了在该框架下可靠提取这些胶子结构时,大动量转移的重要性。

英文摘要:

There has been growing interest in the near-threshold production of heavy quarkonium which can access the gluonic structure in the nucleon. Previously we studied this process with quantum chromodynamics (QCD) and showed that it can be factorized with the gluon generalized parton distributions (GPDs) in the heavy quark limit. We further argued that the hadronic matrix element is dominated by its leading moments corresponding to the gluonic gravitational form factors (GFFs) in this limit. Since then, there have been many new developments on this subject. More experimental measurements have been made and published, and the lattice simulation of gluonic GFFs has been improved as well. In this work, we make an important revision to a previous result and perform an updated analysis with the new inputs. We also study the importance of the large momentum transfer to extract these gluonic structures reliably in this framework.

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。

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