Relativistic flux tube model calculation of the Isgur-Wise function
- Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
The relativistic flux tube model is used to calculate the Isgur-Wise (IW) functions describing the exclusive semileptonic decays of [ital [bar B]] and [ital [bar B]][sub [ital s]] mesons. The light quark mass dependence is investigated and the predicted universal function agrees well with the results of lattice simulations, and with the experimental data. Recent experimental measurements of the [ital [bar B]][r arrow][ital D][sup *][ital l][bar [nu]][sub [ital l]] decay distribution yield the Cabibbo-Kobayashi-Maskawa element [ital V][sub [ital b][ital c]]=0.035[plus minus]0.001. The IW function slope and second derivative at the zero recoil point are predicted to be [xi][prime](1)=[minus]0.93[plus minus]0.04 and [xi][prime][prime](1)=1.7[plus minus]0.1 for a range of light quark masses. The importance of including higher derivatives in analyses of experiment is emphasized.
- DOE Contract Number:
- AC02-76ER00881
- OSTI ID:
- 6579686
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 51:5; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTI-B NEUTRAL MESONS
B MESONS
B NEUTRAL MESONS
BEAUTY PARTICLES
BOSONS
BRANCHING RATIO
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
KOBAYASHI-MASKAWA MATRIX
LATTICE FIELD THEORY
MASS
MATRICES
MATRIX ELEMENTS
MESONS
PARTICLE DECAY
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
SEMILEPTONIC DECAY
SIMULATION
UNIFIED-FIELD THEORIES
WEAK PARTICLE DECAY