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Measurement of the absolute branching fractions for D−s→ℓ−v̄ℓ and extraction of the decay constant fDs

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The absolute branching fractions for the decays D−s→ℓ−¯νℓ (ℓ=e, μ, or τ) are measured using a data sample corresponding to an integrated luminosity of 521 fb−1 collected at center-of-mass energies near 10.58 GeV with the BABAR detector at the PEP-II e+e− collider at SLAC. The number of D−s mesons is...

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Main Authors: Amo Sanchez, Pablo del (Author) , Adametz, Aleksandra (Author) , Marks, Jörg (Author) , Uwer, Ulrich (Author) , Hartmann, Thomas (Author) , Leddig, Torsten (Author) , Schröder, Henning (Author) , Waldi, Roland (Author)
Corporate Author: BABAR Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 10 November 2010
In: Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2010, Volume: 82, Issue: 9, Pages: 1-8
ISSN:1550-2368
DOI:10.1103/PhysRevD.82.091103
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.82.091103
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.82.091103
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Author Notes:BABAR Collaboration
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Summary:The absolute branching fractions for the decays D−s→ℓ−¯νℓ (ℓ=e, μ, or τ) are measured using a data sample corresponding to an integrated luminosity of 521 fb−1 collected at center-of-mass energies near 10.58 GeV with the BABAR detector at the PEP-II e+e− collider at SLAC. The number of D−s mesons is determined by reconstructing the recoiling system DKXγ in events of the type e+e−→DKXD*−s, where D*−s→D−sγ and X represents additional pions from fragmentation. The D−s→ℓ−νℓ events are detected by full or partial reconstruction of the recoiling system DKXγℓ. The branching fraction measurements are combined to determine the D−s decay constant fDs=(258.6±6.4±7.5) MeV, where the first uncertainty is statistical and the second is systematic.
Item Description:Gesehen am 23.08.2023
Im Titel ist "function" als mathematisches Zeichen dargestellt
Im Titel steht der Buchstabe "v" mit einem Oberstrich
BABAR Collaboration: P. del Amo Sanchez, A. Adametz, J. Marks, U. Uwer, T. Hartmann, T. Leddig, H. Schröder, R. Waldi [und viele weitere]
Physical Description:Online Resource
ISSN:1550-2368
DOI:10.1103/PhysRevD.82.091103

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