标题： 在电子质子散射中独产生$J/ψ$的胶子 GPDs 研究 显示英文标题

标题： Study of gluon GPDs in exclusive $J/ψ$ production in electron-proton scattering

摘要： 重夸克$J/\psi$介子的独家光致产生产生于手提袋因子化方法中。 此处必不可少的胶子通用部分分布（GPDs）是通过双分布（DD）表示法构建的。 对于几个胶子GPDs集合的计算截面$H_g$能够描述从HERA到LHC能量范围内的精细$J/\psi$产生实验数据。 基于这种方法，我们估计了由$E_g$和$\tilde{H}_g$确定的$J/\psi$自旋不对称性。 GPDs因子化方法可用于分析电子-质子散射中的重矢量介子产生。 在美国和中国的未来电子-离子对撞机上对此反应的研究可以提供关于胶子GPDs的重要信息。 显示英文摘要

摘要： Exclusive photoproduction of heavy $J/\psi$ meson is performed within handbag factorization method. The General Parton Distributions (GPDs) for gluons which are an essential ingredient here, are constructed using double distribution (DD) representation. The calculated cross section for few sets of gluon GPDs $H_g$ describe fine $J/\psi$ production experimental data from HERA to LHC energies. Based on this approach we estimate $J/\psi$ spin asymmetries determined by $E_g$ and $\tilde{H}_g$. The GPDs factorization approach can be employed to analyse heavy vector meson production in electron-proton scattering. Investigations of this reactions at future electron-ion colliders in USA and China can give an essential information on gluon GPDs.