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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1984, vol. 144, p. 136-140

Measurement of ø-meson radiative decays at the storage ring VEPP-2M with the neutral detector

Druzhinin V. P., Golubev V. B., Ivanchenko V. N., Peryshkin A. N., Redko I. Yu, Serednyakov S. I., Shatunov Yu M., Sidorov V. A., Skrinsky A. N., Vasserman I. B., Vorobyov P. V.

Results of the first experiments with the Neutral Detector at the electron-positron storage ring VEPP-2M are presented. Branching ratios of the ø-meson radiative decays have been measured: B(ø→ηγ)=(1.30±0.06)%, B(ø→π0γ)=(0.130±0.013)%, their accuracy being several times higher than the world average. The width ratio is Γ(ø→ηγ) Γ(ø→π0γ)=(10±1). Using the abovementioned quantities, the ω-ø mixing angle θv=(38.3±0.2)°, as well as the ratio between the effective magnetic moments of the s- and u-quarks, μs μu=(0.57±0.03) have been calculated. © 1984.