Measurement of the Absolute Branching Fraction of D_s^+ --> tau^+ nu_tau Decay

Abstract

Using a sample of tagged D_s decays collected near the D^*_s D_s peak production energy in e+e- collisions with the CLEO-c detector, we study the leptonic decay D^+_s to tau^+ nu_tau via the decay channel tau^+ to e^+ nu_e bar{nu}_tau. We measure B(D^+_s to tau^+ nu_tau) = (6.17 +- 0.71 +- 0.34) %, where the first error is statistical and the second systematic. Combining this result with our measurements of D^+_s to mu^+ nu_mu and D^+_s to tau^+ nu_tau (via tau^+ to pi^+ bar{nu}_tau), we determine f_{D_s} = (274 +- 10 +- 5) MeV.

9 pages, postscript also available through http://www.lns.cornell.edu/public/CLNS/2007/, revised

References in corpus (8)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• High Precision determination of the pi, K, D and D_s decay constants from lattice QCD
• Evidence of the Purely Leptonic Decay B- --> tau- nu_tau-bar
• Relativistic treatment of the decay constants of light and heavy mesons
• Measurement of the Decay Constant $f_D{}_S^{+}$ using $D_S^+ --> ell^+ nu
• Measurement of the Pseudoscalar Decay Constant fDs Using Charm-Tagged Events in e+e- Collisions at \sqrt{s}=10.58GeV
• Effect of H^\pm on B^\pm\to τ^\pmν_τand D^\pm_s\to μ^\pmν_μ,τ^\pmν_τ

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