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arXiv 2210.02154hep-phnucl-th
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核子上的$J/Ψ$光生反应模型

Models of $J/Ψ$ photo-production reactions on the nucleon

T. -S. H. Lee, S. Sakinah, Yongseok Oh

摘要:

核子上的$J/Ψ$光生反应可以提供有关胶子在决定$J/Ψ$ -核子($J/Ψ$ -N)相互作用和核子结构中的作用的信息。$J/Ψ$相互作用的信息是检验格点量子色动力学(LQCD)计算和理解核子共振(如LHCb协作组最近报道的$N^*(P_c)$)所必需的。此外,还需要研究具有隐藏魅力的核的产生,并提取核中的胶子分布。本文主要综述了六种已经和可以用于分析托马斯·杰斐逊国家加速器实验室(JLab)数据的$γ+ p \rightarrow J/Ψ+p$反应模型。每个模型的公式给出,并用于获得的结果,以显示在何种程度上可用的数据可以描述。所提出的模型包括Donnachie和Landshoff的Pomeron交换模型(Pom-DL)及其扩展,以包括从LQCD(Pom-pot)提取的$J/Ψ$ -N势,并且还使用组分夸克模型(CQM)来解释$J/Ψ$的夸克子结构(Pom-CQM)。其他三个模型是从微扰QCD方法来计算两胶子交换使用的广义部分子分布(GPD)的核子(GPD为基础),两个和三个胶子交换使用的部分子分布的核子($2g+3g$),和交换的标量($0^{++}$)和张量($2^{++}$)胶球全息公式(holog)。文中还给出了研究$γ+ p \rightarrow J/Ψ+p$反应中核子共振$N^*(P_c)$激发的结果。

英文摘要:

The $J/Ψ$ photo-production reactions on the nucleon can provide information on the roles of gluons in determining the $J/Ψ$-nucleon ($J/Ψ$-N) interactions and the structure of the nucleon. The information on the $J/Ψ$-N interactions is needed to test lattice QCD (LQCD) calculations and to understand the nucleon resonances such as $N^*(P_c)$ recently reported by the LHCb Collaboration. In addition, it is also needed to investigate the production of nuclei with hidden charms and to extract the gluon distributions in nuclei. The main purpose of this article is to review six reaction models of $γ+ p \rightarrow J/Ψ+p$ reactions which have been and can be applied to analyze the data from Thomas Jefferson National Accelerator Facility (JLab). The formulae for each model are given and used to obtain the results to show the extent to which the available data can be described. The models presented include the Pomeron-exchange model of Donnachie and Landshoff (Pom-DL) and its extensions to include $J/Ψ$-N potentials extracted from LQCD (Pom-pot) and to also use the constituent quark model (CQM) to account for the quark substructure of $J/Ψ$ (Pom-CQM). The other three models are developed from applying the perturbative QCD approach to calculate the two-gluon exchange using the generalized parton distribution (GPD) of the nucleon (GPD-based), two- and three-gluon exchanges using the parton distribution of the nucleon ($2g+3g$), and the exchanges of scalar ($0^{++}$) and tensor ($2^{++}$) glueballs within the holographic formulation (holog). The results of investigating the excitation of the nucleon resonances $N^*(P_c)$ in the $γ+ p \rightarrow J/Ψ+p$ reactions are also given.

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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