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

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

2004-10-28

arxiv.org/abs/hep-ex/0410089v1

Int.J.Mod.Phys. A20 (2005) 3680-3682

Physics

High Energy Physics

High Energy Physics - Experiment

3 pages, 2 figures, submitted to DPF 2004 conference proceedings, UC Riverside, CA

Scientific paper

10.1142/S0217751X05027291

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 the value of ${\cal{B}}(D^+\to\mu^+\nu)=(3.5\pm 1.4 \pm
0.6)\times 10^{-4}$, and determine $f_{D^+}=(198\pm 41\pm 17)$ MeV.

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