Search for the lepton number violation decay $\varphi \to {\pi }^{+}{\pi }^{+}{e}^{-}{e}^{-}$ via $J/\psi \to \varphi \eta$

Abstract

Using $(1.0087\pm 0.0044)\times 10^{10}$ $J/\psi$ events collected by the BESIII detector at the BEPCII collider, we search for the lepton number violation decay $\varphi \to {\pi }^{+}{\pi }^{+}{e}^{-}{e}^{-}$ via $J/\psi \to \varphi \eta$. No signal is found and the upper limit on the branching fraction of $\varphi \to {\pi }^{+}{\pi }^{+}{e}^{-}{e}^{-}$ is set to be $9.7\times 10^{-6}$ at the 90\% confidence level.

arXiv comment10 pages, 5 figures

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