Applicability of perturbative QCD to {ital B}{r_arrow}{ital D} decays
- Department of Physics, National Chung-Cheng University, Chia-Yi, Taiwan (Taiwan, Province of China)
We examine the applicability of perturbative QCD to {ital B} meson decays into {ital D} mesons. We find that the perturbative QCD formalism, which includes Sudakov effects at intermediate energy scales, is applicable to the semileptonic decay {ital B}{r_arrow}{ital Dl}{nu}, when the {ital D} meson recoils fast. Following this conclusion, we analyze the two-body nonleptonic decays {ital B}{r_arrow}{ital D}{pi} and {ital B}{r_arrow}{ital DD}{sub {ital s}}. By comparing our predictions with experimental data, we extract the matrix element {vert_bar}{ital V}{sub {ital c}{ital b}}{vert_bar}=0.044.
- OSTI ID:
- 249530
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 7 Vol. 52; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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