An, CS (reprint author), Inst High Energy Phys, CAS, POB 918, Beijing 100049, Peoples R China.
The contributions from the qqqq (q) over bar components to the magnetic moments of the octet as well as the Delta(++) and Omega(-) decuplet baryons are calculated for the configurations that are expected to have the lowest energy if the hyperfine interaction depends on both spin and flavor. The contributions from the u (u) over bar ,d (d) over bar, and the s (s) over bar components are given separately. It is shown that addition of qqqq (q) over bar admixtures to the ground state baryons can improve the overall description of the magnetic moments of the baryon octet and decuplet in the quark model without SU(3) flavor symmetry breaking, beyond that of the different constituent masses of the strange and light-flavor quarks. The explicit flavor (and spin) wave functions for all the possible configurations of the qqqq (q) over bar components with light and strange q (q) over bar pairs are given for the baryon octet and decuplet. Admixtures of similar to 10% of the qqqq (q) over bar configuration where the flavor-spin symmetry is (FS)(F)(S), which is likely to have the lowest energy, in particular reduces the deviation from the empirical values of the magnetic moments Sigma(-) and the Xi(0) compared with the static qqq quark model.