KA,K*, andφDecay Calculations with Hard Kaons

Abstract

The strong decays of $K_A$, $K^{*}$, and $\phi$ mesons are calculated using (a) Ward identities derived from equaltime commutation relations of chiral $\mathrm{SU}\left(3\right)\mathrm{}\otimes \mathrm{SU}\left(3\right)\mathrm{}$, (b) the notion of a partially conserved strangeness-changing axial-vector current, (c) dominance of spectral functions by gauge mesons, and (d) maximum smoothness of proper vertex functions. This method was originally introduced by Weinberg and Schnitzer for $\mathrm{SU}\left(2\right)\mathrm{}\times \mathrm{SU}\left(2\right)\mathrm{}$ and applied to $A_1$ and $\rho$ decays. We describe the $\omega -\phi$ system by the current-mixing model. The resonance contribution to the $K_A$-decay Dalitz plot is obtained.