Measurement of \calB(D⁺ --> mu⁺ nu) and the Pseudoscalar Decay Constant f_D⁺

2004/08/16 by D. Besson, Besson, D., CLEO Collaboration +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0408071

17 pages postscript, also available through http://www.lns.cornell.edu/public/CONF/2004/, Presented at ICHEP Aug 16-22,2004, Beijing, China

arxiv created 2004/08/16 · arxiv updated 2009/12/01

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 f_D+ =(201+- 41+- 17) MeV.

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