New measurement of the rare decay $\varphi \to {\eta }^{\prime }\gamma$ with CMD-2

Abstract

A new measurement of the rare decay ϕ\to η' γperformed 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 η'\toπ^+π^-η, η\toγγ. The following branching ratio was obtained: B(ϕ\to η' γ) = (8.2^{+2.1}_{-1.9} \pm 1.1) 10^{-5}.

12 pages, 4 figures, LaTex

References in corpus (1)

• Study of the radiative decay $\varphi \to \eta \gamma$ with CMD-2 detector

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