Vector-meson dominance and other models of parity-violating D and F decays

Journal Article · Thu May 01 04:00:00 EDT 1980 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.21.2636· OSTI ID:5411173

McKay, D W; Young, B

A vector-meson-dominance model is presented for nonleptonic decays of the charmed mesons D and F into two uncharmed pseudoscalar mesons. Generalized Cabibbo mixing as suggested by the standard six-quark model is incorporated into the vector-pseudoscalar transition junction. Explicit SU(3) mass-splitting factors give distinctive departures from the predictions based on SU(3). Comparison with the SU(3) parametrization and soft-gluon-corrected charmed-quark decay model are discussed. For Cabibbo-favored modes the latter model makes predictions which are identical to those of the SU(3) limit of our vector-meson pole model. A clear test of the pole model is the prediction that GAMMA(D/sup +/ ..-->.. K-bar/sup 0/K/sup +/)=GAMMA(D/sup 0/ ..-->.. K/sup +/K/sup -/). The D/sup 0/ bold-arrow-left-right D-bar/sup 0/ mixing question is touched on briefly, and it is argued that the experimentally measured disparity between D/sup 0/ ..-->.. K/sup +/K/sup -/ and D/sup 0/ ..-->.. ..pi../sup +/..pi../sup -/ branching ratios means that D/sup 0/ bold-arrow-left-right D-bar/sup 0/ mixing will be a ''normal'' tan/sup 2/theta/sub C/ in amplitude: not suppressed as in the SU(3) limit. The argument is illustrated by the vector-pole-model amplitudes. To organize the decay patterns and to compare different models, we propose a mnemonic quark-graph rule. For K (D) decays, the strange- (charmed-) quark decay graphs: called radiation graphs: are asserted to be suppressed relative to others. The F-meson decays will be critical in testing this rule. The extension to decays of mesons which carry b-quark constituent is outlined briefly.

• Research Organization: Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045
• OSTI ID: 5411173
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 21:9; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BRANCHING RATIO
CABIBBO ANGLE
CHARM PARTICLES
CHARMED MESON RESONANCES
COMPOSITE MODELS
D RESONANCES
DECAY
ELEMENTARY PARTICLES
F-2030 RESONANCES
FIELD THEORIES
HADRONS
HAMILTONIANS
INVARIANCE PRINCIPLES
LIE GROUPS
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MESON RESONANCES
MESONS
P INVARIANCE
PARTICLE DECAY
PARTICLE MODELS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUANTUM OPERATORS
QUARK MODEL
RESONANCE PARTICLES
SU GROUPS
SU-3 GROUPS
SU-4 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
VECTOR DOMINANCE MODEL
WEAK HADRONIC DECAY
WEAK PARTICLE DECAY