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A Measurement Of The Branching Fraction Of The Ds Meson To A Muon And A Neutrino
The purely leptonic decay D<sub>s</sub> → μ ν is studied in a sample of four million hadronic Z decays collected in 1991- 1995 with the ALEPH detector at LEP. A linear discriminant analysis and a kinematic fit to the missing neutrino four-momentum are used to measu...
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| Lenguaje: | eng |
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Washington U.
1999
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| Acceso en línea: | http://cds.cern.ch/record/439664 |
| Sumario: | The purely leptonic decay D<sub>s</sub> → μ ν is studied in a sample of four million hadronic Z decays collected in 1991- 1995 with the ALEPH detector at LEP. A linear discriminant analysis and a kinematic fit to the missing neutrino four-momentum are used to measure the branching fraction β (D<sub>s</sub> → μ ν ) = (0.65 ± 0.085 [stat] ± 0.134 [sys] ± 0.157 [bf])%, where the last uncertainty is from the branching fraction β (D<sub>s</sub> → μ ν ). Within the Standard Model, this result corresponds to <italic><super>f</super></italic>D<sub> s</sub> = (285 ± 19 [stat] ± 29 [sys] ± 41 [bf)] MeV. --- 26 --- AN |
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