The qqqqq̄ components and hidden flavor contributions to the baryon magnetic moments

Abstract The contributions from the qqqqq̄ components to the magnetic moments of the octet as well as the ∆++ and Ω 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 uū, dd̄ and the ss̄ components are given separately. It is shown that addition of qqqqq̄ 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 qqqqq̄ components with light and strange qq̄ pairs are given for the baryon octet and decuplet. Admixtures of ∼ 10% of the qqqqq̄ configuration where the flavor-spin symmetry is [4]FS [22]F [22]S , which is likely to have the lowest energy, in particular reduces the deviation from the empirical values of the magnetic moments Σ and the Ξ0 compared with the static qqq quark model.