Magnetic moments of octet baryons and sea antiquark polarizations

Abstract

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.

Latex, 19 pages 5 eps figures, 2 references added, changes in text to apear in Phys. Rev. D

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• Quark Orbital Angular Momentum in the Baryon
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Cited by in corpus (4)

• Covariant spectator quark model description of the ${\gamma }^{\ast }\Lambda \to {\Sigma }^0$ transition
• Light-cone QCD Sum Rules for the $\Lambda$ Baryon Electromagnetic Form Factors and its magnetic moment
• Tensor charge and anomalous magnetic moment correlation
• Magnetic moments of octet baryons, angular momenta of quarks and sea antiquark polarizations