NLL Corrections for B-Meson Radiative Exclusive Decays
arXiv:hep-ph/9905412 · doi:10.1016/S0370-2693(99)01304-0
Abstract
We calculate the next-to-leading corrections to the branching ratio of exclusive $B\to K^* γ$ decay. The renormalization scale dependence is reduced compared to the leading logarithmic result but there remains a dependence on a cutoff parameter of the hadronic model. The calculated corrections increase the predicted branching ratio by about 10%, but it remains in agreement with the experimental value.
16 pages, 8 figures