Measurement of the ratio of branching fractions B(D0πe+νe)/B(D0Ke+νe)

Abstract
Using 3.0 fb1 of data collected with the CLEO-II detector, we study the Cabibbo-suppressed decay D0π e+ νe. The ratio of the branching fractions B(D0π e+ νe)/B(D0K e+ νe) is measured to be (10.3±3.9±1.3)%, corresponding to an upper limit of 15.6% at the 90% confidence level.

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