Limits on neutral<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>D</mml:mi></mml:math>mixing in semileptonic decays

Abstract

Using the CLEO II.V detector observing ${e}^{+}{e}^{\ensuremath{-}}$ 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 $Ke\ensuremath{\nu}$ and ${K}^{*}e\ensuremath{\nu}$ channels we find that the rate for $D$ mixing is less than 0.0078 at $90%$ C.L.