Flavor Asymmetry of Antiquark Distributions in the Nucleon

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  • 19 February 1997
Abstract
[1] Introduction, [2] Possible violation of the Gottfried sum rule, (2.1) Gottfried sum rule, (2.2) Early experimental results, (2.3) NMC finding and recent progress, (2.4) Existing Drell-Yan data, [3] Expectations in perturbative QCD, (3.1) Operator product expansion, (3.2) Perturbative correction to the Gottfried sum, [4] Theoretical ideas for the sum-rule violation, (4.1) Small x contribution, (4.2) Lattice QCD, (4.3) Pauli exclusion principle, (4.4) Mesonic models, (4.4.1) Meson-cloud contribution, (4.4.2) Chiral models, (4.4.3) Anomalous Q^2 evolution, (4.5) Diquark model, (4.6) Isospin symmetry violation, (4.7) Nuclear correction: shadowing in the deuteron, (4.8) Parametrization of antiquark distributions, (4.9) Flavor asymmetry ubar-dbar in nuclei, (4.10) Relation to nucleon spin, (4.11) Comment on a kinematical effect, [5] Finding the flavor asymmetry ubar-dbar in various processes, (5.1) Drell-Yan process, (5.2) W and Z production, (5.3) Quarkonium production at large x_F, (5.4) Charged hadron production, (5.5) Neutrino scattering, [6] Related topics on antiquark distributions, [7] Summary and outlook

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