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Measuring cal B(D^+ --> mu^+ nu) and the Pseudoscalar Decay Constant f_D^+

G. Bonvicini·CLEO Collaboration
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Abstract

In 60 inverse-pb of data taken on the psi(3770) resonance with the CLEO-c detector, we find 8 D+ -> mu+ nu decay candidates that are mostly signal, containing only 1 estimated background. Using this statistically compelling sample, we measure a value of B(D+ -> mu+ nu) = (3.5 +/- 1.4 +/- 0.6) x10^(-4), and determine fD+=(202 +/- 41 +/-17) MeV.

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G. Bonvicini, CLEO Collaboration. 2004-11-26. Measuring cal B(D^+ --> mu^+ nu) and the Pseudoscalar Decay Constant f_D^+. https://doi.org/10.1103/physrevd.70.112004

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