New measurement of the rare decay $φ\to η' γ$ with CMD-2

Details New measurement of the rare decay $φ\to η' γ$ with CMD-2 New measurement of the rare decay $φ\to η' γ$ with CMD-2

1999-11-24

arxiv.org/abs/hep-ex/9911036v1

Phys.Lett.B473:337-342,2000

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages, 4 figures, LaTex

Scientific paper

10.1016/S0370-2693(99)01475-6

A new measurement of the rare decay \phi \to \eta' \gamma performed with the CMD-2 detector at Novosibirsk is described. Of the data sample corresponding to the integrated luminosity of 14.5 pb^{-1}, twenty one events have been selected in the mode \eta'\to\pi^+\pi^-\eta, \eta\to\gamma\gamma. The following branching ratio was obtained: B(\phi \to \eta' \gamma) = (8.2^{+2.1}_{-1.9} \pm 1.1) 10^{-5}.

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