1997/12/23 by S. B. Gerasimov, Gerasimov, S. B. · 1 citation
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9712511
8 pages, Latex, no figures, Talk given at the VII-th International Workshop on High Energy Spin Physics, Dubna, 7-12 July 1997, to be published in Proceedings
arxiv created 1997/12/23 · openalex publication_date 1997/12/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The phenomenological sum-rule-based approach is used to discuss the quark composition dependence of some static and quasi-static electroweak characteristics of nucleons.The role of nonvalence degrees of freedom, the nucleon sea partons and/or peripheral meson currents, is shown to be important to select and make use of the relevant symmetry parametrization of hadron observables. With our preferable universal value of the SU(3)-symmetry parameter αD=D/F+D=.58, taken for both magnetic moments and axial-vector constants entering into the semi-leptonic baryon decays, we obtain the following values for moments Δq of the spin-dependent structure function of the proton: Δu ≃ .84(.82), Δd ≃ -.42(-.44), Δs=-.22 ± .05 (-.10 ± .03), where the values in parentheses correspond to the widely used "standard" value of αaxialD=.63. The estimations of the strange sea contributions to the nucleon magnetic moments and rms are also presented.