Magnetic moments of octet baryons and sea antiquark polarizations
| Autor: | Jan Bartelski, Stanisław Tatur |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Physics
Quark Nuclear and High Energy Physics Angular momentum Particle physics Octet Magnetic moment High Energy Physics::Lattice Nuclear Theory High Energy Physics::Phenomenology FOS: Physical sciences Lambda baryon Deep inelastic scattering Baryon High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Quantum electrodynamics High Energy Physics::Experiment Sum rule in quantum mechanics |
| DOI: | 10.48550/arxiv.hep-ph/0407369 |
| Popis: | Using generalized Sehgal equations for magnetic moments of baryon octet and taking into account $\Sigma^{0}-\Lambda$ mixing and two particle corrections to independent quark contributions we obtain very good fit using experimental values for errors of such moments. We present sum rules for quark magnetic moments ratios and for integrated spin dendities ratios. Due to the SU(3) structure of our equations the results for magnetic moments of quarks and their densities depend on two additional parameters. Using information from deep inelastic scattering and baryon $\beta$-decays we discuss the dependence of antiquark polarizations on introduced parameters. For some plausible values of these parameters we show that these polarizations are small if we neglect angular momenta of quarks. Our very good fit to magnetic moments of baryon octet can still be improved by using specific model for angular momentum of quarks. Comment: Latex, 19 pages 5 eps figures, 2 references added, changes in text to apear in Phys. Rev. D |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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