Abstract
Abstract Using a data sample corresponding to an integrated luminosity of 300 pb −1 obtained at PEP with the High Resolution Spectrometer, the wrong-sign decay D 0 →K + π − has been searched for using a sample of D ∗ →D 0 π events. A 4% upper limit is obtained at the 90% confidence level for the ratio of the wrong sign to the right sign decay rate in the Kπ mode.
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