Search for the lepton number violation decay $\omega \to {\pi }^{+}{\pi }^{+}{e}^{-}{e}^{-}+c.c.$

Abstract

The lepton number violation decay $\omega \to {\pi }^{+}{\pi }^{+}{e}^{-}{e}^{-}+c.c.$ is searched for via $J/\psi \to \omega \eta$ using a data sample of $(1.0087\pm 0.0044)\times 10^{10}$ $J/\psi$ events collected by the BESIII detector at the BEPCII collider. No significant signal is observed, and the upper limit on the branching fraction of $\omega \to {\pi }^{+}{\pi }^{+}{e}^{-}{e}^{-}+c.c.$ at the 90\% confidence level is determined for the first time to be $2.8\times 10^{-6}$.

arXiv comment9 pages, 3 figures

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