Search for the Lepton Flavor Violation Processes $J/\psi \to$ $\mu \tau$ and $e\tau$

Abstract

The lepton flavor violation processes $J/\psi \to \mu \tau$ and $e\tau$ are searched for using a sample of 5.8$\times 10^7$ $J/\psi$ events collected with the BESII detector. Zero and one candidate events, consistent with the estimated background, are observed in $J/\psi \to \mu \tau ,\tau \to e{\bar{\nu }}_e{\nu }_{\tau }$ and $J/\psi \to e\tau ,\tau \to \mu {\bar{\nu }}_{\mu }{\nu }_{\tau }$ decays, respectively. Upper limits on the branching ratios are determined to be $Br(J/\psi \to \mu \tau )<2.0\times 10^{-6}$ and $Br(J/\psi \to e\tau )<8.3\times 10^{-6}$ at the 90% confidence level (C.L.).

9 pages, 2 figures

References in corpus (4)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• First Results from KamLAND: Evidence for Reactor Anti-Neutrino Disappearance
• Measurement of the rate of nu_e + d --> p + p + e^- interactions produced by 8B solar neutrinos at the Sudbury Neutrino Observatory
• Search for Lepton Flavor Violation Process J/$\psi \to e\mu$

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• Snowmass 2021 White Paper: Charged lepton flavor violation in the tau sector
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