NLO PDFs from the ABMP16 fit

作者：Alekhin S; Bluemlein J; Moch S^*

来源：European Physical Journal C, 2018, 78(6): 477.

DOI：10.1140/epjc/s10052-018-5947-1

We perform a global fit of parton distribution functions (PDFs) together with the strong coupling constant as and the quark masses m(c), m(b) and m(t) at next-to-leading order (NLO) in QCD. The analysis applies the (MS) over bar renormalization scheme for alpha(s) and all quark masses. It is performed in the fixed-flavor number scheme for n(f) = 3, 4, 5 and uses the same data as the previous ABMP16 fit at next-to-next-to-leading order (NNLO). The new NLO PDFs complement the set of ABMP16 PDFs and are to be used consistently with NLO QCD predictions for hard scattering processes. At NLO we obtain the value alpha((nf = 5))(s) (M-Z) = 0.1191 +/- 0.0011 compared to a(s)((nf = 5)) (M-Z) = 0.1147 +/- 0.0008 at NNLO.

• 出版日期2018-6-11