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Measuring B(D^+ -> μ^+ν) and the Pseudoscalar Decay Constant f_{D^+}

N. Menaa
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Abstract

In 60 pb$^{-1}$ of data taken on the $ψ(3770)$ resonance with the CLEO-c detector, we find 8 $D^+\toμ^+ν$ event candidates that are mostly signal, containing only 1 estimated background. Using this statistically compelling sample, we measure the value of ${\cal{B}}(D^+\toμ^+ν)=(3.5\pm 1.4 \pm 0.6)\times 10^{-4}$, and determine $f_{D^+}=(198\pm 41\pm 17)$ MeV.

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N. Menaa. 2004-10-28. Measuring B(D^+ -> μ^+ν) and the Pseudoscalar Decay Constant f_{D^+}. https://doi.org/10.1142/s0217751x05027291

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