Axial-vector meson mixing in orthocharmonium decays
Abstract
The new BES measurement on the two-body decays of J/psi and psi' into an axial-vector meson and a pseudoscalar meson is analyzed with the axial-K mixing including the one-photon annihilation contribution. A somewhat puzzling pattern of the K1+ K- decay channels can be understood with no tight constraint on the mixing angle. The branching fractions of the K10 K-bar0 channels will be the cleanest source of information to determine the mixing angle from the 1+ 0- decays of J/psi and psi'.
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