Abstract
We discuss the magnetic moments of the baryons allowing for flavor symmetry breaking in the quark magnetic moments. We show that there is a correlation between isospin symmetry breaking and data for the nucleon spin structure obtained from deep inelastic scattering. For small values of the isospin symmetry breaking, of the order of 5%, the magnetic moments and weak axial-vector form factors alone indicate a value of the spin polarization ΔΣ≤0.20. Larger values of the spin polarization are compatible only with large isospin symmetry breaking. We also calculate weak axial-vector form factors, which are independent of the symmetry breakings, from magnetic moment data and find good agreement with experiment.
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Supported by the Swedish Natural Science Research Council (NFR), contract F-UR32821-105
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Linde, J., Snellman, H. Flavor symmetry breaking in quark magnetic moments. Z. Phys. C - Particles and Fields 64, 73–77 (1994). https://doi.org/10.1007/BF01557236
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DOI: https://doi.org/10.1007/BF01557236