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 04:00:00 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]

---

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), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:9; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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