Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-11-22
Z.Phys.C54:73-77,1994
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, REVTeX, TRITA-TFY-93-08 1 figure has been added (available via conventional mail), some parts has been rewritten
Scientific paper
10.1007/BF01557236
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 $\Delta\Sigma \leq 0.20$. 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.
Linde Johan
Snellman Hakan
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