Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-02-19
Phys.Rept.303:183-257,1998
Physics
High Energy Physics
High Energy Physics - Phenomenology
3+79 pages, LATEX2e, 29 eps figures. Physics Reports in press. Complete postscript file is available at http://www.cc.saga-u
Scientific paper
10.1016/S0370-1573(98)00016-7
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 Small $x$ contribution 2.5 Nuclear correction: shadowing in the deuteron 2.6 Parametrization of antiquark distributions 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 Lattice QCD 4.2 Pauli exclusion principle 4.3 Mesonic models 4.3.1 Meson-cloud contribution 4.3.2 Chiral models 4.3.3 Anomalous $Q^2$ evolution 4.4 Diquark model 4.5 Isospin symmetry violation 4.6 Flavor asymmetry ubar-dbar in nuclei 4.7 Relation to nucleon spin 4.8 Comment on effects of quark mass and transverse motion 5 Finding the flavor asymmetry ubar-dbar in various processes 5.1 Drell-Yan process 5.1.1 Fermilab-E866 results 5.2 W and Z production 5.3 Quarkonium production at large $x_{_F}$ 5.4 Charged hadron production 5.5 Neutrino scattering 5.6 Experiments to find isospin symmetry violation 6 Related topics on antiquark distributions 7 Summary and outlook
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