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The Impact of Single Top Data on CT14nnlo PDFs
International Journal of Theoretical Physics ( IF 1.3 ) Pub Date : 2020-08-17 , DOI: 10.1007/s10773-020-04473-6
Alim Ablat , Sayipjamal Dulat , Reyima Rashidin , Alim Ruzi , Nijat Yalkun

In this paper we study the impact of ATLAS 8 TeV t-channel single top quark production data on CT14nnlo PDFs. First, we calculate the total cross section, cross section ratio, differential cross section, and normalized differential cross section as a function of transverse momentum pT and rapidity y, at next-to-leading order QCD by MadGraph using CT14nnlo PDFs. And then we update CT14nnlo PDFs and observables by applying Error PDF Updating method. We find that down quark PDF increased roughly about 3% in 10− 4 < x < 4 × 10− 3 range at Q = 1.3 GeV, when weight factor equals to six. Furthermore, for data and theory comparison, we get slightly better agreement after updating observables.

中文翻译:

单顶数据对 CT14nnlo PDF 的影响

在本文中,我们研究了 ATLAS 8 TeV t 通道单顶夸克产生数据对 CT14nnlo PDF 的影响。首先,我们通过 MadGraph 使用 CT14nnlo PDF 计算总横截面、横截面比、微分横截面和归一化微分横截面作为横向动量 pT 和速度 y 的函数。然后我们通过应用错误 PDF 更新方法更新 CT14nnlo PDF 和可观察值。我们发现,当权重因子等于 6 时,在 Q = 1.3 GeV 时,下夸克 PDF 在 10− 4 < x < 4 × 10− 3 范围内增加了大约 3%。此外,对于数据和理论的比较,我们在更新观察值后获得了稍微更好的一致性。
更新日期:2020-08-17
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