期刊
PHYSICAL REVIEW D
卷 96, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.96.014011
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资金
- Bundesministerium fur Bildung und Forschung [05H15GUCC1]
- European Commission (HIGGSTOOLS) [PITN-GA-2012-316704]
We determine a new set of parton distribution functions (ABMP16), the strong coupling constant as and the quark masses m(c), m(b) and m(t) in a global fit to next-to-next-to-leading order (NNLO) in QCD. The analysis uses the (MS) over bar scheme for alpha(s) and all quark masses and is performed in the fixed-flavor number scheme for n(f) = 3, 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 alpha((nf = 5))(s)(M-Z) = 0.1147 +/- 0.0008.
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