出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We report on the QCD calculation of the hadronic matrix elements relevant for the exclusive rare B decays, such as B → K(∗)ℓ+ℓ− and B → K∗g . The hadronic input for the decay observables, in addition to the heavy-light form factors, contains specific contributions, generated by the fourquark and penguin operators, such as the charm-loop effects. The corresponding hadronic matrix elements are calculated by the same method as the form factors, applying OPE and light-cone sum rules in QCD. This technique allows one to take into account the nonfactorizable soft-gluon contributions. The results are expressed in terms of (process-dependent) corrections to the shortdistance coefficients of the effective Hamiltonian. The impact of these corrections on the most important observables, e.g., on the forward-backward asymmetry in B→K∗ℓ+ℓ−, is estimated.
