A model for leptons

~~ In obtaining the expression (11) the mass difference between the charged and neutral has been ignored. ~2M. Adernollo and R. Gatto, Nuovo Cimento 44A, 282 (1966); see also J. Pasupathy and H, . E. Marshak, Phys. Rev. Letters 17, 888 (1966). ~3The predicted ratio I.eq. |,'12)] from the current algebra is slightly larger than that (0.23%) obtained from the p-dominance model of Ref. 2. This seems to be true also in the other case of the ratio &(t) ~+m y}/ &(V V} calculated in Refs. 12 and 14. L. M. Brown and P. Singer, Phys. Rev. Letters 8, 460 (1962}.