Evidence for Magnetic Fields in Light Meson Spectra

Mac Gregor's constituent-quark model is reviewed with currently published data from light meson spectroscopy. It was previously shown that magnetic sources were responsible for the quantization of several mass-splittings in Mac Gregor's model. The existence of a 70-MeV quantum was postulated by Mac Gregor and was shown to fit the Nambu empirical mass formula mn = (n/2)137me, n a positive integer. It is shown in this paper that the light meson spectra also fit into the constituent-quark model and are in agreement with the Russell-Saunders coupling scheme. The existence of magnetic fields is suggested by the successful accounting of these meson spectra.