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arxiv 1402.4025 v2 pith:P3MCEU5J submitted 2014-02-17 hep-ex
Search for the rare decays J/psi to D_s^-rho^+ and J/psi to overline{D}{}⁰overline{K}{}^(ast0)
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A search for the rare decays of $J/\psi \to D_s^-\rho^+ + c.c.$ and $J/\psi \to \overline{D}{}^0\overline{K}{}^{\ast0} + c.c.$ is performed with a data sample of 225.3 million $J/\psi$ events collected with the BESIII detector. No evident signal is observed. Upper limits on the branching fractions are determined to be $\mathcal{B}(J/\psi \to D_s^-\rho^+ + c.c.) < 1.3 \times 10^{-5}$ and $\mathcal{B}(J/\psi \to \overline{D}{}^0\overline{K}{}^{\ast0} + c.c.) < 2.5 \times 10^{-6}$ at the $90\%$ confidence level.
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