Improved measurement of the branching ratio of J/psi-->KS KL
Abstract
The branching ratio of J/psi-->KS KL is measured with improved precision to be B(J/psi-->KS KL) = (1.82 0.04 0.13)× 10-4. using J/psi data collected with the Beijing Spectrometer (BESII) at the Beijing Electron-Positron Collider. This result is used to test the perturbative QCD ``12%'' rule between psi(2S) and J/psi decays and to investigate the relative phase between the three-gluon and one-photon annihilation amplitudes in J/psi decays.
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