通过ePump (error PDF (parton distribution function) updating method package)研究了大型强子对撞机(large hadron collider, LHC)在质心能量$ \sqrt{s}=2.76 $ TeV时, 来自ATLAS (a toroidal LHC apparatus)探测器单喷注的双微分散射截面的实验数据对CT18NNLO (next-to-next-to-leading order)部分子分布函数(PDF)的影响. 首先, 使用CT18NNLO 部分子分布函数计算了单喷注的双微分散射截面, 观察到理论预测与实验数据符合得较好; 其次, 计算了单喷注双微分散射截面的理论预测值与CT18NNLO胶子部分子分布函数的关联余弦$\mathrm{c}\mathrm{o}\mathrm{s}\phi$; 最后, 使用ePump更新了CT18NNLO 部分子分布函数, 并研究了实验数据与全局拟合数据间的冲突. 通过比较在$ Q=100 $ GeV时CT18NNLO 胶子部分子分布函数和ePump更新的胶子部分子分布函数, 发现ATLAS 2.76 TeV单喷注双微分散射截面实验数据在大和小的动量分数$ x $区域对CT18NNLO 胶子部分子分布函数的约束较小.

This study aimed to investigate the impact of the inclusive jet double differential cross-section data retrieved from the ATLAS at the large hadron collider(LHC), at the center-of-mass energy of $ \sqrt{s}=2.76 $ TeV, on CT18NNLO parton distribution functions(PDFs) by applying the error PDF updating method package(ePump). First, the inclusive jet double differential cross-sections were calculated with non-perturbative correction using the CT18NNLO PDFs. It was observed that the theoretical predictions concurred with the experimental data. Thereafter, the correlation $ \mathrm{c}\mathrm{o}\mathrm{s}\phi $ was established between theoretical predictions for the inclusive jet double differential cross-sections and the CT18NNLO gluon PDFs. Finally, the ePump was applied to update the CT18NNLO PDFs; the differences between these data and the original global fitting data were investigated. The CT18NNLO gluon PDFs and ePump updated gluon PDFs were compared at $ Q=100 $ GeV, and it was found that the ATLAS 2.76 TeV inclusive jet double differential cross-sections data could slightly constrain the CT18NNLO gluon PDFs at both small and large $ x $ regions.