Search for the charmonium weak decay $J/\psi \to {\bar{D}}^0{\bar{K}}^{\ast 0}+c.c.$

Abstract

Based on a sample of $(10087\pm 44)\times 10^6$ $J/\psi$ events collected at the center-of-mass energy $\sqrt{s}$ = 3.0969 GeV with the BESIII detector, we search for the charmonium rare weak decay $J/\psi \to {\bar{D}}^0{\bar{K}}^{\ast 0}+c.c.$. No significant signal is observed, and the upper limit on its decay branching fraction at the 90% confidence level is set as $1.4\times 10^{-7}$, improving the sensitivity of the previous best limit by an order of magnitude.

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Cited by in corpus (1)

• Exclusive semileptonic and nonleptonic $J/\psi$ decays