Limits on neutral $D$ mixing in semileptonic decays

Using the CLEO II.V detector observing

e^{+} e^{-}

collisions at around 10.6 GeV we search for neutral

D

mixing in semileptonic

D^{0}

decays tagged in charged

D^{*}

decays. Combining the results from the

K e ν

and

K^{*} e ν

channels we find that the rate for

D

mixing is less than 0.0078 at

90 %

C.L.

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Limits on neutralDmixing in semileptonic decays