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

Journal Article · Thu May 01 00:00:00 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), Vol. 21:9
• Country of Publication: United States
• Language: English

Related Subjects

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