Search for the charged lepton flavor violating decay $\psi (3686)\to e^{\pm }{\mu }^{\mp }$

Abstract

By analyzing $(2367.0\pm 11.1)\times 10^6$ $\psi (3686)$ events collected in $e^{+}{e}^{-}$ collisions at $\sqrt{s}=3.686\mathrm{GeV}$ with the BESIII detector at the BEPCII collider, we report the first search for the charged lepton flavor violating decay $\psi (3686)\to e^{\pm }{\mu }^{\mp }$. No signal is found. An upper limit on the branching fraction $\mathcal{B}(\psi (3686)\to e^{\pm }{\mu }^{\mp })$ is determined to be $1.4\times 10^{-8}$ at the 90\% confidence level.

12 pages, 4 figures

References in corpus (14)

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• Method for detector description transformation to Unity and application in BESIII
• Determination of the number of $\psi (3686)$ events taken at BESIII
• Lepton flavor violating quarkonium decays
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• Search for the lepton flavor violating decay $J/\psi \to e\mu$
• Experimental dataset from BESIII detector at Beijing electron positron collider