Jm. Soares, CONSTRAINTS ON VERTICAL-BAR-V(TD)VERTICAL-BAR FROM RADIATIVE DECAYS OF THE B-MESONS, Physical review. D. Particles and fields, 49(1), 1994, pp. 283-288
The possibility of using a future measurement of the ratio B(B --> rho
gamma)/(B --> Kgamma) to improve the constraints on the CKM parameter
\V(td)\ is investigated. Special attention is paid to the two main so
urces of theoretical uncertainties: the SU(3) flavor symmetry-breaking
effects and the contribution from final-state interactions.