Strange magnetic moment of the nucleon and SU(3) breaking: group theoretical approach

Abstract

An extended group-theoretical approach to magnetic moments of the octet baryons is proposed with the aim of extracting the strange magnetic moment of the nucleon. Special attention is given to flavor SU(3) breaking. In this approach, isoscalar and isovector magnetic moments are treated separately in view of their different behavior under SU(3) breaking. We conclude that the anomalous magnetic moment associated with the flavor singlet current is small. Together with the small isoscalar anomalous magnetic moment of the nucleon, this implies suppression of the strange magnetic moment of the proton which is found to be small and positive, mu^(s) = (0.16 \pm 0.03) mu_N in units of the nuclear magneton.

arXiv comment6 pages, no figure, 6 tables, use REVTeX4

References in corpus (18)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Measurement of Strange Quark Contributions to the Nucleon's Form Factors at Q^2=0.230 (GeV/c)^2
• The Strange Quark Contribution to the Proton's Magnetic Moment
• Parity-violating electroweak asymmetry in $\vec{e}p$ scattering
• Evidence for Strange Quark Contributions to the Nucleon's Form Factors at $Q^2$ = 0.108 (GeV/c)${}^2$
• Precise determination of the strangeness magnetic moment of the nucleon
• Parity-violating Electron Deuteron Scattering and the Proton's Neutral Weak Axial Vector Form Factor
• New Measurement of Parity Violation in Elastic Electron-Proton Scattering and Implications for Strange Form Factors
• The $s\bar{s}$ component of the proton and the strangeness magnetic moment
• The Strangeness Radius and Magnetic Moment of the Nucleon Revisited
• Strange vector currents and the OZI-rule
• QCD Equalities for Baryon Current Matrix Elements
• Strange magnetism in the nucleon
• Strange form factors in the context of SAMPLE, HAPPEX, and A4 experiments
• Chiral Symmetry and the Nucleon's Vector Strangeness Form Factors
• Strange and singlet form factors of the nucleon: Predictions for G0, A4, and HAPPEX-II experiments
• Dispersion Analysis of the Strange Vector Form Factors of the Nucleon
• Flavor structure of the octet magnetic moments

Cited by in corpus (2)

• Isospin violation in the vector form factors of the nucleon
• Baryon Tri-local Interpolating Fields