Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-06-15
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages, with two figs. Talk given at Novosibirsk Workshop 1-5 Mar 1999
Scientific paper
We present a VMD based model aiming to describe all radiative decays of light mesons. We show that the SU(3) breaking mechanism proposed by Bando, Kugo and Yamawaki (BKY), supplemented by nonet symmetry breaking in the pseudoscalar sector are sufficient to provide a nice description of all data, except the charged K* radiative width. It is also shown that nonet symmetry breaking has effects which cannot be disantangled from those produced by coupling of glue to the eta' meson. Coupling of glue to $\eta$ is not found to be required by the data. Asssuming the charged K* radiative width is indeed at its presently accepted value necessitates to supplement the BKY breaking in a way which finally preserves an equivalence statement between the VMD approach to radiative decays and the Wess-Zumino-Witten Lagrangian.
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