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- Title
Gottfried Sum Rule in QCD Nonsinglet Analysis of DIS Fixed-Target Data.
- Authors
Kotikov, A. V.; Krivokhizhin, V. G.; Shaikhatdenov, B. G.
- Abstract
Deep-inelastic-scattering data from fixed-target experiments on the structure function <italic>F</italic>2 were analyzed in the valence-quark approximation at the next-to-next-to-leading-order accuracy level in the strong-coupling constant. In this analysis, parton distributions were parametrized by employing information from the Gottfried sum rule. The strong-coupling constant was found to be <italic>α</italic><italic>s</italic>(<italic>M</italic>2Z) = 0.1180 ± 0.0020 (total expt. error), which is in perfect agreement with the world-averaged value from an updated Particle Data Group (PDG) report, <italic>α</italic>PDG<italic>s</italic> (<italic>M</italic>2Z) = 0.1181 ± 0.0011. Also, the value of 〈<italic>x</italic>〉<italic>u</italic>−<italic>d</italic> = 0.187 ± 0.021 found for the second moment of the difference in the <italic>u</italic>- and <italic>d</italic>-quark distributions complies very well with the most recent lattice result 〈<italic>x</italic>〉LATTICE<italic>u</italic>−<italic>d</italic> = 0.208 ± 0.024.
- Subjects
INELASTIC scattering; QUARKS; PARTICLES (Nuclear physics); LEPTON-hadron scattering; NUCLEAR physics
- Publication
Physics of Atomic Nuclei, 2018, Vol 81, Issue 2, p244
- ISSN
1063-7788
- Publication type
Article
- DOI
10.1134/S1063778818020126