Observation of the conversion decay $\varphi \to {\pi }^0{e}^{+}{e}^{-}$ at CMD-2

Abstract

Using 15.1^{-1} of data collected by CMD-2 in the $\varphi$-meson energy range, the branching ratio of the conversion decay $\varphi \to {\pi }^0{e}^{+}{e}^{-}$ has been measured for the first time: B(ϕ\toπ^0e^+e^-) = (1.22 \pm 0.34 \pm 0.21) \cdot 10 ^{-5}.

13 pages, 6 PostScript figures, uses refmerge.sty. To be published in Phys. Lett. B

References in corpus (1)

• Cross section of the reaction $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ below 1 GeV at CMD-2

Cited by in corpus (4)

• Measurement of the $\varphi \to {\pi }^0{e}^{+}{e}^{-}$ transition form factor with the KLOE detector
• Observation of Electromagnetic Dalitz decays J/ψ\to P e^+e^-
• Study of the $\rho$ and $\omega$ meson decays into pseudoscalar meson and $e^{+}{e}^{-}$ pair with the CMD-2 detector
• CMD-2 and SND results on the rho, omega and phi