论文标题
$ j/ψ$的模型在核子上的照片产生反应
Models of $J/Ψ$ photo-production reactions on the nucleon
论文作者
论文摘要
核子上的$ j/ψ$照片产生反应可以提供有关胶子在确定$ j/ψ$ -nucleon（$ j/ψ$ -n）相互作用和细胞核结构中的作用的信息。需要有关$ J/ψ$ -N交互的信息来测试晶格QCD（LQCD）计算，并了解LHCB协作最近报告的$ n^*（p_c）$等细胞核共振。另外，还需要研究用隐藏魅力的核的产生，并提取核中的gluon分布。本文的主要目的是审查$γ+ P \ Rightarrow J/ψ+ P $反应的六个反应模型，并且可以应用于托马斯·杰斐逊国家加速器设施（JLAB）的数据。给出了每个模型的公式，并用于获得结果，以显示可以描述可用数据的程度。提出的模型包括Donnachie和Landshoff（POM-DL）的Pomeron-Exchange模型及其扩展名，包括从LQCD（POM-POT）提取的$ j/ψ$ -n电位，还使用构成夸克模型（CQM）来说明QUARK的QUARK子结构$ J/ψ$（POM-CQM）。其他三个模型是通过应用扰动的QCD方法来开发的，以使用核子（基于GPD）的广义Parton分布（GPD），使用核的两种和三胶质交换来计算两丝汇率，并使用核的分布（$ 2G+3G $），以及scalar（$ 0^$ 0^^$} $++++++++++++++++++++++++++++++++++++0^^^+++++0^^{++++++0^^^++} （$ 2^{++} $）胶球中的胶球（全息）。还给出了调查$γ+ p \ rightarrow j/ψ+ p $反应中核子共振激发$ n^*（p_c）$的激发的结果。
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.
