Applicability of Perturbative QCD to B →
نویسنده
چکیده
We examine the applicability of perturbative QCD to B meson decays into D mesons. We find that the perturbative QCD formalism, which includes Sudakov effects at intermediate energy scales, is applicable to the semi-leptonic decay B → Dlν, when the D meson recoils fast. Following this conclusion, we analyze the two-body non-leptonic decays B → Dπ and B → DD s. By comparing our predictions with experimental data, we extract the matrix element |V cb | = 0.044.
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