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2007-04-05

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/140340

Measurement of the Pseudoscalar Decay Constant fDs Using Charm-Tagged Events in e+e− Collisions at √s=10.58 GeV

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https://doi.org/10.1103/PhysRevLett.98.141801

Abstract

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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Física de partícules, Experiments

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Particle physics, Experiments

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citation

GRAUGÉS POUS, Eugeni and BABAR Collaboration. Measurement of the Pseudoscalar Decay Constant fDs Using Charm-Tagged Events in e+e− Collisions at √s=10.58 GeV. Physical Review Letters. 2007. Vol. 98, num. 14, pags. 141801. ISSN 0031-9007. [consulted: 14 of August of 2026]. Available at: https://hdl.handle.net/2445/140340

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