Search for the Invisible Decay of $\jpsi$ in $\psi (2S)\to \pi +{\pi }^{-}J/\psi$

Abstract

Using 14.0 million $\psi (2S)eventscollectedwiththeBES-IIdetector,asearchforthedecayofthe$\jpsi$toaninvisiblefinalstatein$\psipto$isperformed.The$\jpsi$peakinthedistributionofmassrecoilingagainstthe$π^+π^-$isusedtotag$ψ$invisibledecay.Nosignalisfound,andanupperlimitatthe90$1.2\times 10^{-2}$fortheratio$\frac{{\cal B}(\jpsi\ar {invisible})}{{\cal B}(\jpsi\arμ^+μ^-)}$.Thisisthefirstsearchfor$J/ψ$ decay to an invisible final state.

5 pages, 3 figures

References in corpus (4)

• U-boson production in e+e- annihilations, psi and Upsilon decays, and Light Dark Matter
• Constraints on Light Dark Matter and U bosons, from psi, Upsilon, K+, pi0, eta and eta' decays
• Search for Invisible Decay of the ${\rm Y}(1S)$
• U-boson at BESIII

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• Search for invisible decays of ${\pi }^0,\eta ,{\eta }^{\prime },K_S$ and $K_L$: A probe of new physics and tests using the Bell-Steinberger relation
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• Probing unparticle theory via lepton flavor violating process $J/\psi \to l{l}^{\prime }$ at BESIII
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