Search for the process ${\mathbf{e}}^{+}{\mathbf{e}}^{-}\to \eta$

Abstract

A search for the rare decay $\eta \to e^{+}{e}^{-}$ is performed using the inverse process $e^{+}{e}^{-}\to \eta$ in the decay mode $\eta \to {\pi }^0{\pi }^0{\pi }^0$. We analyze data with an integrated luminosity of 654 nb${}^{-1}$ accumulated at the VEPP-2000 $e^{+}{e}^{-}$ collider with the SND detector at the center-of-mass energy $E=m_{\eta }{c}^2\approx 548$ MeV, and set the upper limit $\mathcal{B}(\eta \to e^{+}{e}^{-})<7\times 10^{-7}$ at the 90\% confidence level.

arXiv comment9 pages, 4 figures

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Cited by in corpus (4)

• The anomalous magnetic moment of the muon in the Standard Model
• Signals of the QCD axion with mass of 17 MeV/c^2: nuclear transitions and light meson decays
• Search for direct production of the $f_1(1285)$ resonance in $e^{+}{e}^{-}$ collisions
• First Observation of the Direct Production of the ${\chi }_{c1}$ in $e^{+}{e}^{-}$ Annihilation