The Coleman–Glashow sum-rule for magnetic moments is always fulfilled in the chiral quark model, independently of SU(3) symmetry breaking. This is due to the structure of the wave functions, coming from the non-relativistic quark model. Experimentally, the Coleman–Glashow sum-rule is violated by about ten standard deviations. To overcome this problem, two models of wave functions with configuration mixing are studied. One of these models violates the Coleman–Glashow sum-rule to the right degree and also reproduces the octet baryon magnetic moments rather accurately.

• Received 11 April 1997

DOI:https://doi.org/10.1103/PhysRevD.57.452