论文标题
$ j/ψ$在两股票交易模型中的接近阈值光生产
Near-threshold photoproduction of $J/ψ$ in two-gluon exchange model
论文作者
论文摘要
$ j/ψ$的接近阈值光生产被认为是一个黄金过程，以揭示Nucleon质量结构，涉及魅力夸克的五角夸克状态，以及在大$ x $（$> 0.1 $）下核子的受限制性的GLUON分布较差。在本文中，我们在两胶弹交换模型下对当前的实验数据进行了分析，该数据显示出良好的一致性。使用带有三个自由参数的参数化函数形式，我们在$ j/ψ$质量尺度上确定了核子gluon分布。此外，我们预测$ j/ψ$的电气生产的差分横截面是EICC最终Hadrons $ W $不变质量的函数，作为模型的实际应用和获得的Gluon分布。根据我们的估计，在阈值附近的EICC上，每年可以检测到成千上万的$ J/ψ$事件。因此，建议在EICC上进行相关的实验测量。
The near-threshold photoproduction of $J/ψ$ is regarded as one golden process to unveil the nucleon mass structure, pentaquark state involving the charm quarks, and the poorly constrained gluon distribution of the nucleon at large $x$ ($>0.1$). In this paper, we present an analysis of the current experimental data under a two-gluon exchange model, which shows a good consistency. Using a parameterized function form with three free parameters, we have determined the nucleonic gluon distribution at the $J/ψ$ mass scale. Moreover, we predict the differential cross section of the electroproduction of $J/ψ$ as a function of the invariant mass of the final hadrons $W$, at EicC, as a practical application of the model and the obtained gluon distribution. According to our estimation, thousands of $J/ψ$ events can be detected per year on EicC near the threshold. Therefore, the relevant experimental measurements are suggested to be carried out on EicC.
