Abstract
TheSU3 breaking in the effective coupling constants for a vector meson decaying into two ps mesons is discussed from the point of view of a Lagrangian field theory of vector mesons, essentially based on the Ward identity and the Johnson sum rule. With reasonable approximations, the results of current algebra or of sum rules for the spectral functions ofSU3 symmetry are reproduced, although the dynamical assumption on the symmetry breaking is not the same.
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