Measurement of B(D+ --> mu+ nu) and the Pseudoscalar Decay Constant fD+
D. Besson, CLEO Collaboration
Abstract
In 60 pb-1 of data taken on the psi(3770) resonance with the CLEO-c detector, we find 8 D+ to mu+ nu event candidates that are mostly signal, containing only 1 estimated background. Using this statistically compelling sample, we measure preliminary values of B(D+ to mu+ nu) = (3.5 +- 1.4 +- 0.6)*10-4, and determine fD+ =(201+- 41+- 17) MeV.
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