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We estimate the isospin-violating QED radiative corrections to thecharged-to-neutral ratios of the decay rates for B^+ and B^0 in non-leptonic Bmeson decays. In particular, these corrections are potentially important forprecision measurement of the charged-to-neutral production ratio of B meson ine^+e^- annihilation. We calculate explicitly the QED corrections to the ratiosof two different types of decay rates \Gamma(B^+ \to J/\psi K^+)/\Gamma(B^0 \toJ/\psi K^0) and \Gamma(B^+ \to D^+_S \bar{D^0})/\Gamma(B^0 \to D^+_S D^-)taking into account the form factors of the mesons based on the vector mesondominance model, and compare them with the results obtained for the point-likemesons.Comment: 7 pages, 9 eps figure

QED CORRECTIONS TO ISOSPIN-RELATED DECAY RATES OF CHARGED AND NEUTRAL B MESONS