Gottfried sum rule in QCD NS analysis of DIS fixed target data

2016/12/19 by A. V. Kotikov, Kotikov, A. V., V.G. Krivokhizhin +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1612.06412

openalex publication_date 2016/12/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Deep inelastic scattering data on F₂ structure function obtained in the fixed-target experiments were analysed in the valence quark approximation with a next-to-next-to-leading-order accuracy. Parton distribution functions are parametrized by using information from the Gottfried sum rule. The strong coupling constant is found to be α_s(M_Z²) = 0.1180 ± 0.0020~\mbox(total exp.error), which coincides very well with the average world value α_s^{\rm PDG}(M_Z²) = 0.1181 ± 0.0013 updated recently in a PDG report. The result for the second moment of the difference in u and d quark distributions _u-d=0.187 ± 0.021 is seen to be well compatible with the latest LATTICE result _u-d^{\rm LATTICE}=0.208 ± 0.024

Citations

• Massless Propagators, R(s) and Multiloop QCD

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• Experimental constraints on coefficients of α_S-expansion of Gottfried sum rule
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