Measurement of the Pseudoscalar Decay Constant fDs Using Charm-Tagged Events in e+e− Collisions at √s=10.58 GeV
Using 230.2 fb − 1 of e + e − annihilation data collected with the BABAR detector at and near the peak of the Υ ( 4 S ) resonance, 489 ± 55 events containing the pure leptonic decay D + s → μ + ν μ have been isolated in charm-tagged events. The ratio of partial widths Γ ( D + s → μ + ν μ ) / Γ (...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2007 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/140340 |
| Acceso en línea: | https://hdl.handle.net/2445/140340 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Experiments Particle physics |
| Sumario: | Using 230.2 fb − 1 of e + e − annihilation data collected with the BABAR detector at and near the peak of the Υ ( 4 S ) resonance, 489 ± 55 events containing the pure leptonic decay D + s → μ + ν μ have been isolated in charm-tagged events. The ratio of partial widths Γ ( D + s → μ + ν μ ) / Γ ( D + s → ϕ π + ) is measured to be 0.143 ± 0.018 ± 0.006 allowing a determination of the pseudoscalar decay constant f D s = ( 283 ± 17 ± 7 ± 14 ) MeV . The errors are statistical, systematic, and from the D + s → ϕ π + branching ratio, respectively. |
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