Electromagnetic Perturbation of the Pseudoscalar-Mass Spectrum

Using the formalism developed in the preceding paper, we investigate electromagnetic perturbations in a rather general chiral $\mathrm{SU}\left(3\right)\mathrm{}\times \mathrm{SU}\left(3\right)\mathrm{}$ model of mesons. The meson and octet baryon mass shifts can be successfully correlated, and it is found that the electromagnetic breaking term in the Lagrangian may be of the same order of magnitude as the chiral-symmetry-breaking term. We also discuss the speculation that all strong symmetry breaking may be of electromagnetic and weak origin.