This paper presents perturbative QCD predictions of the electron charge asymmetry for inclusive production in proton-proton (pp) collisions. Perturbative QCD calculations are performed at next-to-next-to-leading order (NNLO) accuracy using different parton distribution function (PDF) models at 8, 13, and 14 TeV center-of-mass energies of CERN LHC pp collisions. NNLO calculations are performed for electrons with transverse momenta above 20 GeV in the forward electron pseudorapidity region . NNLO predictions are first compared at 8 TeV with the measurements of the LHCb experiment at the LHC for the / cross section ratio and charge asymmetry distributions. The 8 TeV predictions using NNPDF3.1, CT14, and MMHT2014 PDF sets are reported to be in good agreement with the LHCb data for the entire region, justifying the extension of the calculations to 13 and 14 TeV energies. The charge asymmetry predictions at NNLO accuracy are reported in the forward bins at 13 and 14 TeV and compared among NNPDF3.1, CT14, and MMHT2014 PDF sets. Overall, the predicted differential cross-section and charge asymmetry distributions based on different PDF sets are found to be consistent with each other for the entire region. The charge asymmetry distributions are shown to be more sensitive to discriminate among different PDF models in terms of the 14 TeV predictions.

本文介绍了质子 - 质子 ( pp ) 碰撞中包含性产生的电子电荷不对称性的微扰 QCD 预测。微扰 QCD 计算是在 CERN LHC pp碰撞的8、13 和 14 TeV 质心能量下使用不同的部分分布函数 (PDF) 模型以次先行顺序 (NNLO) 精度执行的。NNLO 计算是针对正向电子赝快速区中横向动量高于 20 GeV 的电子进行的。NNLO预测是在8 TeV能与LHCb的实验在LHC用于测量第一比较/横截面比和电荷不对称分布。据报道，使用 NNPDF3.1、CT14 和 MMHT2014 PDF 集的 8 TeV 预测与整个区域的 LHCb 数据非常吻合，证明将计算扩展到 13 和 14 TeV 能量是合理的。NNLO 精度下的电荷不对称预测在13 和 14 TeV的前向bin中报告，并在 NNPDF3.1、CT14 和 MMHT2014 PDF 集之间进行比较。总体而言，发现基于不同 PDF 集的预测微分横截面和电荷不对称分布在整个区域中彼此一致。根据 14 TeV 预测，电荷不对称分布对区分不同 PDF 模型更敏感。