Recent developments in the theory of heavy-quark decays

Conference · Mon Jun 01 04:00:00 EDT 1992

OSTI ID:7277594

Neubert, M

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: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 7277594
• Report Number(s): SLAC-PUB-5842; CONF-9204126--2; ON: DE92017598
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BEAUTY PARTICLES
BOSONS
DECAY
DESIGN
ELEMENTARY PARTICLES
FIELD THEORIES
FORM FACTORS
HADRONS
MESONS
PARTICLE DECAY
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SEMILEPTONIC DECAY
SYMMETRY BREAKING
WEAK PARTICLE DECAY