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Measurement of the Branching Ratio for D_s->tau nu_tau Decays

The OPAL collaboration·G. Abbiendi
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Abstract

Using about 3.9 million hadronic Z decays from e+e- collisions recorded by the OPAL detector at LEP at centre-of-mass energies near MZ the branching ratio for the decay D_s -> tau nu_tau has been measured to be (7.0 +/- 2.1(stat) +/- 2.0 (syst))%. This result can be used to derive the decay constant of the D_s meson: f(D_s) = 286 +/- 44(stat) +/- 41(syst) MeV.

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The OPAL collaboration, G. Abbiendi. 2001-03-11. Measurement of the Branching Ratio for D_s->tau nu_tau Decays. https://doi.org/10.1016/s0370-2693(01)00936-4

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