Search for the baryon and lepton number violating decay $J/\psi \to p{e}^{-}$ + c.c

Abstract

Based on $(2712.4\pm 14.3)\times 10^6$ $\psi (3686)$ events collected by the BESIII detector operating at the BEPCII storage ring, we perform a search for the baryon- and lepton-number violating decay $J/\psi \to p{e}^{-}+c.c.$ via $\psi (3686)\to {\pi }^{+}{\pi }^{-}J/\psi$. No significant signal is found. An upper limit on the branching fraction of $\mathcal{B}(J/\psi \to p{e}^{-}+c.c.)<3.1\times 10^{-8}$ at 90\% confidence level.

arXiv comment8 pages, 1 figure

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• Search for heavy Majorana neutrino in lepton number violating decays of D-> K pi e+ e+
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• Search for baryon and lepton number violating decays $D^{+}\to \bar{\Lambda }({\bar{\Sigma }}^0)e^{+}$ and $D^{+}\to \Lambda ({\Sigma }^0)e^{+}$
• Search for baryon and lepton number violating decays $D^0\to \bar{p}{e}^{+}$ and $D^0\to p{e}^{-}$
• Search for $\bar{\Lambda }$-$\Lambda$ oscillations in the decay $J/\psi \to p{K}^{-}\bar{\Lambda }+c.c.$
• Search for baryon and lepton number violation decay $D^{\pm }\to n(\bar{n})e^{\pm }$
• Search for the lepton number violation decay $\varphi \to {\pi }^{+}{\pi }^{+}{e}^{-}{e}^{-}$ via $J/\psi \to \varphi \eta$