Search for the rare decays $J/\psi \to D_s^-\rho^+$ and $J/\psi \to \overline{D}{}^0\overline{K}{}^{\ast0}$

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.

Categories: hep-ex