Gl. Castro et al., FURTHER REMARKS ON ISOSPIN BREAKING IN CHARMLESS SEMILEPTONIC B DECAYS, Physical review. D. Particles and fields, 56(9), 1997, pp. 6025-6027
We consider the isospin-breaking corrections to charmless semileptonic
decays of B mesons. Both the recently measured branching ratios of ex
clusive decays by the CLEO Collaboration and the end-point region of t
he inclusive lepton spectrum in form factor models can be affected by
these corrections. Isospin corrections can affect the determination of
\V-nb\ from exclusive semileptonic B decays at a level comparable to
present statistical uncertainties.