There is a difference of a factor 64 between our calculation and that of Riazuddin and Fayyazuddin. We believe that the latter authors have used a wrong definition of A differing by a factor of 8 from the conventional one, so that we have to multiply their expression by 64. 8 S. Coleman and S e L. Glashow, Phys. Rev. Letters 6>, 423 (1961). Equation (13) has been also noted by E. C. G. Sudarshan (private communication). We may remark that we can estimate y by another formula, y = (l/2v r 3*)[m 2 (7r 0 ) + 3w 2 (i)) -4m 2 (K 0 )], but this gives an unreasonably large value for y (see reference 4). It might also be noted that it would not necessarily vanish in the charge-independence limit, whereas the formula used, Eq. (13), does. 9
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