Recent developments in the theory of heavy-quark decays
I report on recent developments in the heavy-quark effective theory and its application to B meson decays. The parameters of the effective theory, the spin-flavor symmetry limit, and the leading symmetry-breaking corrections to it are discussed. The results of a QCD sum rule analysis of the universal Isgur-Wise functions that appear at leading and subleading order in the 1 /m {sub Q} expansion are presented. I illustrate the phenomenological applications of this formalism by focusing on two specific examples: the determination of V {sub cb} from the endpoint spectrum in semileptonic decays, and the study of spin-symmetry violating effects in ratios of form facts. I also briefly comment on nonleptonic decays.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 10161944
- Report Number(s):
- SLAC-PUB-5842; CONF-9204126-2; ON: DE92017598
- Resource Relation:
- Conference: B factories: state of the art in accelerators, detectors, and physics,Stanford, CA (United States),6-10 Apr 1992; Other Information: PBD: Jun 1992
- Country of Publication:
- United States
- Language:
- English
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