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Improved measurement of the branching ratio of J/psi-->K_S K_L

J. Z. Bai, for the BES Collaboration

Published 2003-10-13Version 1

The branching ratio of J/psi-->K_S K_L is measured with improved precision to be B(J/psi-->K_S K_L) = (1.82\pm 0.04\pm 0.13)\times 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.

Comments: 10 pages, 14 figures, 2 tables, submitted to Phys. Rev. D
Journal: Phys.Rev.D69:012003,2004
Categories: hep-ex
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