Search for the rare decays J/ψ→Ds−e+νe, J/ψ→D−e+νe, and J/ψ→D0¯e+e−

We report on a search for the decays J/ψ→Ds−e+νe+c.c., J/ψ→D−e+νe+c.c., and J/ψ→D0¯e+e−+c.c. in a sample of 5.8×107J/ψ events collected with the BESII detector at the BEPC. No excess of signal above background is observed, and 90% confidence level upper limits on the branching fractions are set: B(J/ψ→Ds−e+νe+c.c.)<4.9×10−5, B(J/ψ→D−e+νe+c.c.)<1.2×10−5, and B(J/ψ→D0¯e+e−+c.c.)<1.1×10−5.