Connections between inclusive and exclusive semileptonic B decay

Journal Article · Sat Mar 01 04:00:00 EST 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.53254· OSTI ID:580224

Wise, M B ^[1]

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1. California Institute of Technology, Pasadena, California 91125 (United States)

B decay sum rules relate exclusive B semileptonic decay matrix elements to forward B-meson matrix elements of operators in HQET. At leading order the operators that occur are the b-quark kinetic energy {lambda}{sub 1} and chromomagnetic energy {lambda}{sub 2}. The latter is determined by the measured B{sup {asterisk}}{minus}B mass splitting. The derivation of these sum rules is reviewed and perturbative QCD corrections are discussed. A determination of {lambda}{sub 1} and the energy of the light degrees of freedom in a B-meson, {bar {Lambda}}, from semileptonic B decay data is presented. Future prospects for improving these sum rules are discussed. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: California Institute of Technology
• Sponsoring Organization: USDOE
• DOE Contract Number: FG03-92ER40701
• OSTI ID: 580224
• Report Number(s): CONF-9610310--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 400; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
B MESONS
MATRIX ELEMENTS
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
SEMILEPTONIC DECAY
SUM RULES