Radiative decays of vector mesons and off-shell factors in the vector-dominance model

Journal Article · Fri Dec 01 04:00:00 EST 1978 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.18.4350· OSTI ID:6506610

Bagchi, B; Nandy, A

The recent measurements of V ..-->.. P..gamma.. decays have led to a number of theoretical formulations to explain the low rates. In the vector-meson-dominance model this is accomplished by introducing a suppression factor at one of the vertices of the off-shell vector meson, but this leads to inconsistencies when compared with experimental data. For the case of new mesons we have found that suppression factors need to be introduced at both vertices to give a good fit to the data. In this paper we show that this scheme, applied to the case of the old mesons assuming only simple SU(3), gives fits that are as good as or better than other generally more complicated models.

• Research Organization: Department of Theoretical Physics, Indian Association for the Cultivation of Science, Calcutta 700 032 India
• OSTI ID: 6506610
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 18:11; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
COMPOSITE MODELS
COUPLING CONSTANTS
DECAY
ELECTROMAGNETIC PARTICLE DECAY
ELEMENTARY PARTICLES
GAMMA SPECTRA
HADRONS
LIE GROUPS
MATHEMATICAL MODELS
MESON RESONANCES
MESONS
NUCLEAR MODELS
PARTICLE DECAY
PARTICLE MODELS
PSEUDOSCALAR MESONS
QUARK MODEL
RADIATIVE DECAY
RESONANCE PARTICLES
SHELL MODELS
SPECTRA
SU GROUPS
SU-3 GROUPS
SYMMETRY BREAKING
SYMMETRY GROUPS
VECTOR DOMINANCE MODEL
VECTOR MESONS
WEAK PARTICLE DECAY