Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/140340
Title: Measurement of the Pseudoscalar Decay Constant fDs Using Charm-Tagged Events in e+e− Collisions at √s=10.58 GeV
Author: Graugés Pous, Eugeni
BABAR Collaboration
Keywords: Física de partícules
Experiments
Particle physics
Experiments
Issue Date: 5-Apr-2007
Publisher: American Physical Society
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.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.98.141801
It is part of: Physical Review Letters, 2007, vol. 98, num. 14, p. 141801
URI: http://hdl.handle.net/2445/140340
Related resource: https://doi.org/10.1103/PhysRevLett.98.141801
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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