Abstract
We determine a new set of parton distribution functions (ABMP16), the strong coupling constant and the quark masses , and in a global fit to next-to-next-to-leading order (NNLO) in QCD. The analysis uses the scheme for and all quark masses and is performed in the fixed-flavor number scheme for , 4, 5. Essential new elements of the fit are the combined data from HERA for inclusive deep-inelastic scattering (DIS), data from the fixed-target experiments NOMAD and CHORUS for neutrino-induced DIS, data from Tevatron and the LHC for the Drell-Yan process and the hadro-production of single-top and top-quark pairs. The theory predictions include new improved approximations at NNLO for the production of heavy quarks in DIS and for the hadro-production of single-top quarks. The description of higher twist effects relevant beyond the leading twist collinear factorization approximation is refined. At NNLO, we obtain the value .
27 More- Received 31 January 2017
DOI:https://doi.org/10.1103/PhysRevD.96.014011
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