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Search for the Decay J/psi -> gamma + invisible
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Search for the Decay J/psi -> gamma + invisible
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A search for J/psi radiative decay to weakly interacting neutral final states was performed using the CLEO-c detector at CESR. A total of 3.7 x 10^{6} tagged J/psi events was collected at the psi(2S) resonance and used to study the decay J/psi -> gamma+X, where X is a narrow state that is invisible to the detector. No significant signal was observed and upper limits on the branching fraction were set for masses m_X up to 960 MeV/c^2. The upper limit corresponding to m_X=0 is 4.3x 10^{-6} at the 90% confidence level.
Forward citations
Cited by 1 Pith paper
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Lattice determination of the neutrino background for $J/\psi \rightarrow \gamma + \textrm{invisible}$
Lattice QCD predicts Br(J/ψ → γννbar) = 1.00(9)(7)×10^-10, the Standard Model neutrino background for J/ψ → γ + invisible.
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