Abstract
In this article, we present a Next-to-Leading Order (NLO) QCD analysis to determine of Parton Distribution Functions (PDFs) and the strong coupling αs(MZ2) based on four different, Thorne-Roberts (TR or RT), Thorne-Roberts Fast (RT FAST), Thorne-Roberts Optimal (RTOPT) and Thorne-Roberts Optimal Fast (RTOPT FAST) heavy-quark schemes and compare the central values of PDFs, fit quality and numerical values of the strong coupling with each other. We show the best fit quality is corresponding to RTOPT FAST heavy-quark scheme with χTotal2/dof=1.077 and the best improvement in the uncertainty of the strong coupling is corresponding again to RTOPT FAST scheme with αs(MZ2)=0.1184±0.0030.
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