Determination of [vert bar][ital V][sub [ital t][ital s]][vert bar] from [ital D][r arrow][ital K][sup *][ital l][nu] and [ital B][r arrow][ital K][sup *][gamma] data via heavy quark symmetry and perturbative QCD

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.5751· OSTI ID:7006657

Griffin, P A; Masip, M; McGuigan, M ^[1]

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1. Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)

We use heavy quark effective theory (HQET) and perturbative QCD to study the heavy-meson--light-vector-meson transitions involved in [ital D] and [ital B] decays. HQET is used to relate the measured [ital D][r arrow][ital K][sup *][ital l][nu] vector and axial-vector form factors at four-momentum transfer [ital q][sup 2]=0 to the [ital B][r arrow][ital K][sup *][gamma] tensor and axial-tensor form factors at [ital q][sup 2]=16.5 GeV[sup 2]. Perturbative QCD is then used to find matching conditions for the [ital B]-meson form factors at [ital q][sup 2]=0. A five parameter vector-dominance''-type fit of the two HQET form factors, consisting of single pole, double pole, and subtraction terms, is used to match the data at [ital q][sup 2]=16.5 GeV[sup 2] to QCD at [ital q][sup 2]=0. The values at [ital q][sup 2]=0 are compared with recent data on the exclusive rate for [ital B][r arrow][ital K][sup *][gamma] decay to extract a value for the Cabibbo-Kobayashi-Maskawa matrix element [vert bar][ital V][sub [ital t][ital s]][vert bar]=0.026, with 23% experimental uncertainty, and 29% theoretical uncertainty from higher order QCD effects and violations of heavy quark symmetry.

• DOE Contract Number: FG05-86ER40272
• OSTI ID: 7006657
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 50:9; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Pa
B MESONS
RADIATIVE DECAY
D MESONS
SEMILEPTONIC DECAY
KOBAYASHI-MASKAWA MATRIX
MATRIX ELEMENTS
QUANTUM CHROMODYNAMICS
PERTURBATION THEORY
QUARKS
SYMMETRY
ELECTRONS
FORM FACTORS
K -892 MESONS
MOMENTUM TRANSFER
NEUTRINOS
VECTOR MESONS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
LEPTONS
MASSLESS PARTICLES
MATRICES
MESONS
PARTICLE DECAY
PARTICLE PROPERTIES
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
STRANGE MESONS
STRANGE PARTICLES
UNIFIED-FIELD THEORIES
WEAK PARTICLE DECAY
662210* - Specific Theories & Interaction Models
Particle Systematics- Unified Theories & Models- (1992-)
662240 - Models for Strong Interactions- (1992-)
662350 - Decays of Mesons- (1992-)
662390 - Electromagnetic Processes & Properties- (1992-)