Abstract
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.
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