1998/09/22 by B. Dressler, Dressler, B., K. Goeke +9 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9809487
12 pages, LaTeX, 3 figures included using epsf. Part of Plenary Talk given by C. Weiss at the XI International Conference ``Problems of Quantum Field Theory'' (In Memory of D.I. Blokhintsev), Dubna, July 13-17, 1998
arxiv created 1998/09/22 · openalex publication_date 1998/09/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We summarize recent attempts to calculate the flavor asymmetry of the nucleon's sea quark distributions in the large-Nc limit, where the nucleon can be described as a soliton of an effective chiral theory. We discuss the leading-twist longitudinally polarized and transversity antiquark distributions, Δ u (x) - Δ d (x) and δ u (x) - δ d (x), as well as the unpolarized one, u (x) - d (x), which appears only in the next-to-leading order of the 1/Nc-expansion. Results for u (x) - d (x) are in good agreement with the recent Drell-Yan data from the FNAL E866 experiment. The longitudinally polarized antiquark asymmetry, Δ u (x) - Δ d (x), is found to be larger than the unpolarized one.