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; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 7277594
- 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
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
B MESONS
SEMILEPTONIC DECAY
DESIGN
FORM FACTORS
QUANTUM CHROMODYNAMICS
SYMMETRY BREAKING
BEAUTY PARTICLES
BOSONS
DECAY
ELEMENTARY PARTICLES
FIELD THEORIES
HADRONS
MESONS
PARTICLE DECAY
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
WEAK PARTICLE DECAY
662350* - Decays of Mesons- (1992-)
662230 - Quantum Chromodynamics- (1992-)